# Granny flat construction evidence and development comparisons Granny flat construction evidence for Victorian owners: organise site records, compare quote scope, test completed-property comparables and connect handover to the first lease. A backyard project brings together land, an existing home, a proposed dwelling and a future operating plan. These guides show which record answers each question, how to recognise a weak comparison and what to resolve before moving to the next commitment. Victoria · original decision guidance Examples describe how to assess evidence. Planning, building, title, service and operating requirements need separate project checks. Research filters describe a chosen product; they do not define a legal category. Yan Zhu · E2ES · 2026-10-09 Original text: CC BY 4.0 with attribution. Gallery photographs and linked material retain their existing rights; they are outside this text licence. ## Granny flat site evidence: a brief that survives design and quoting https://e2es.com.au/construction-evidence/granny-flat-site-evidence-pack Granny flat site evidence is most useful when every record has a job. A listing photograph can help you discuss an idea; a title plan, a survey and a service response answer different questions. Give the designer a pack that keeps those jobs visible. ### Start with the land you actually control Record the address, lot and plan identifier, existing dwelling and intended work area on the same brief. If a listing describes a unit or a large shared site, establish which land belongs to the property and which areas depend on common property or another party. An advertised land size alone does not locate the usable backyard. Attach the current contract and title material for review rather than translating a restriction into a casual yes/no. Ask the relevant adviser to identify easements, covenants and other interests that affect the intended work. Keep the document date and the unresolved question next to the record. [Inspect properties before you buy](https://www.consumer.vic.gov.au/housing/buying-and-selling-property/buying-property/inspect-properties-before-you-buy) ### Keep planning information separate from dimensions A Planning Property Report identifies zones and overlays and links to applicable provisions. Put it in the pack as planning evidence, with the report date and parcel identifier. It does not become a measured set-out drawing because it contains a map. In the proposed-use note, distinguish a small second dwelling from a rooming house or a separately saleable unit. Those labels should follow the intended project and applicable assessment. A market comparison with another dwelling form cannot establish the approval pathway for this site. [Planning property report and VicPlan](https://www.planning.vic.gov.au/planning-schemes/planning-property-report); [Small second homes: planning and building framework](https://www.planning.vic.gov.au/guides-and-resources/strategies-and-initiatives/small-second-dwellings) ### Show what was measured and what was inferred Mark the existing house, fences, trees, sheds, changes in level and access corridor. For each dimension, say whether it came from a survey, a site measurement or an online image. A roof edge, fence and legal boundary can be different lines; merging them can produce a convincing plan with the wrong clearance. Use a concept footprint to discover questions, then record the dimensions that require confirmation. The most helpful drawing may show a disputed edge or missing measurement rather than a polished dwelling squeezed into an assumed envelope. This gives the next professional a specific task. ### Connect the layout to services and everyday use List the water, sewer, stormwater, electricity and communication information available, plus records still to be obtained. Show proposed routes and who will check them. A short visual distance to an existing bathroom does not prove a connection is available or that the proposed route is acceptable. Add the intended occupants, storage, laundry, privacy, accessibility needs and construction access. Explain what must keep working in the front home during the build. A design brief that omits those needs can pass a drawing review yet create an expensive change when work starts. [Work near water assets and easements](https://southeastwater.com.au/building-and-development/water-and-sewer-assets/work-near-assets-and-easements/) ### Leave an auditable next decision Finish with a compact decision record: proposed option, evidence supporting it, unresolved issue, person responsible and next review date. Keep superseded drawings alongside the current revision so a builder is not quoting one layout while the engineer designs another. Treat confidence as specific to a question. You may know the intended room layout while still lacking a sewer response. Marking the entire project “confirmed” hides that distinction. Move to the next commitment when the evidence required for that commitment is available, with residual assumptions clearly priced or assigned. ### Documents to take to the next conversation - Current property identity and title material, with questions for the adviser. - Dated planning report and a measured or clearly labelled concept plan. - Existing-service records, proposed routes and responsibility for verification. - One current design revision and a list of unresolved decisions. ### Questions owners ask #### Can an online backyard plan replace a survey? Use an online plan to test a concept and identify missing measurements. Keep its inferred lines separate from survey dimensions, title boundaries and construction set-out. #### What should I send before asking for a granny flat quote? Send the intended layout and current revision, property identity, available site and service records, and a list of unresolved items. Ask which assumptions the quote includes. ## Backyard feasibility: when a map cannot find the existing house https://e2es.com.au/construction-evidence/backyard-map-missing-building-footprint Backyard feasibility can fail before the proposed granny flat is assessed: the map may not reliably identify the existing house. That is a data question. Resolve it before interpreting an empty overlay as an empty backyard or an uncertain result as a building prohibition. ### Separate an empty layer from an unsuccessful request An online screen can show no building outline because coverage is missing, a request failed, the source was temporarily unavailable or the dwelling is newer than the imagery. These situations produce similar pictures but need different follow-up. Record the source and response state instead of a single “no house” label. If a layer failed to load, repeat the check or seek another source before drawing a geometric conclusion. If the source loaded and genuinely contains no outline, use current site information to identify the dwelling. The absence of a feature is evidence about that source, not automatically evidence about the property. ### Check what the address pin represents An address point may mark the parcel frontage, entrance or another representative location. It need not sit in the centre of the roof. A workflow that assumes it must lie inside a roof polygon can reject an obvious house; one that accepts any nearby polygon can choose a shed or a neighbour. Check the address, parcel, street frontage and roof together. Where the candidate is ambiguous, keep the identity unresolved rather than moving the pin until the result becomes favourable. A relocation needs a reason and a saved comparison with the original position. [Planning property report and VicPlan](https://www.planning.vic.gov.au/planning-schemes/planning-property-report) ### Inspect the whole roof, not just the largest segment Tree shadows, roof colour and changes in roof direction can split one dwelling into several detected shapes. Selecting a neat rectangle may omit the wing that occupies the proposed access corridor. Conversely, joining every adjacent shape may incorporate a veranda, garage or neighbouring structure. A useful review overlays the candidate boundary on imagery and compares it with photographs or a measured plan. Record which parts are roof, which parts are enclosed dwelling and which are uncertain. Roof geometry supports screening; it does not establish wall positions or construction setbacks. ### Turn uncertainty into a task Distinguish “not assessed”, “source unavailable”, “candidate house uncertain” and “identified house, proposed layout constrained”. These labels tell the owner whether the next step is a data refresh, a photograph, a survey or a design revision. One generic fail result gives no such direction. Do not upgrade a result just because a second automated method agrees with the first. Both may use the same aerial image or mistaken parcel. Seek an independent record that addresses the disputed fact, and preserve the original result so a later reviewer can see what changed. ### Confirm the relevant dimensions before committing Check the actual boundary, house wall, eaves, service corridor and access width that control the proposal. An apparently generous garden can have a constrained service route or a fence that does not follow the title line. The site evidence pack should describe the remaining work explicitly. Carry the corrected geometry into the designer’s current revision and ask which dimensions require formal confirmation. For planning information, refer to the actual zone and overlay provisions; for building and siting, use the project assessment. A repaired map is an improved concept input, not a permit. [Planning property report and VicPlan](https://www.planning.vic.gov.au/planning-schemes/planning-property-report); [Small second homes: planning and building framework](https://www.planning.vic.gov.au/guides-and-resources/strategies-and-initiatives/small-second-dwellings) ### Documents to take to the next conversation - Saved original result with source date and any failed-layer status. - Photographs or an independent plan identifying the existing dwelling. - Disputed boundary, eaves and access dimensions listed for measurement. - A revised concept with the change and its reason recorded. ### Questions owners ask #### Does a missing footprint mean no house exists? No. It may reflect missing coverage, a failed request or an identification problem. Check the source state and independent site records before drawing that conclusion. #### Can roof outlines determine buildable setbacks? Roof outlines help screen a concept. Wall positions, legal boundaries, siting requirements and project-specific approvals need separate verification. ## Granny flat quote comparison: put scope beside the price https://e2es.com.au/construction-evidence/granny-flat-quote-scope-comparison A granny flat quote comparison begins with the deliverable. Two totals can describe different buildings, different site assumptions or different stages of completion. Put the scope beside the price so the comparison survives contact with the actual site. ### Ask each builder to price the same current brief Use one drawing revision, one specification and the same owner requirements. Include the bathroom arrangement, laundry, appliances, heating, storage and finishes you expect. If one quote prices a different layout, identify that difference before debating its total. Keep a quote register showing the date, validity period, drawing revision and exclusions. When the brief changes, ask for a revised quote or a clearly identified adjustment. A later email should not silently replace the scope attached to an earlier number. [Building contracts checklist](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/building-contracts) ### Build a responsibility matrix for the whole project For each work item, record whether it is included, an allowance, excluded, owner-supplied or awaiting information. Include demolition, foundation preparation, service trenching, switchboard work, paths, fences, landscaping, waste removal and reinstatement where relevant. Blank cells are unresolved scope, not free work. Specify the starting and finishing point of each item. “Sewer connection” can leave open the route, tie-in, authority process and reinstatement. “Site access” can leave open whether fences are removed and who restores them. The matrix should identify the party completing each interface. ### Separate a selected item from an uncertain quantity Consumer Affairs Victoria distinguishes prime cost items, involving selections not finally identified and costed, from provisional sums for work whose cost is still estimated. Ask what each allowance covers and what evidence will make it final. Keep your comparison on the same basis: item, allowance, assumed quantity, excluded components and adjustment method. Do not simply add an arbitrary contingency to one builder and leave another unchanged. Track the specific unresolved items so the budget can improve as the evidence improves. [Building contracts checklist](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/building-contracts) ### Make the price basis and completion point visible Check whether each quoted amount includes GST and whether costs paid directly by the owner sit outside it. Identify which inspections, documents, connections and practical tasks remain before the dwelling can be used as intended. The relevant permit determines the completion documentation required. Separate the building quote from the project budget. Adviser fees, owner works, financing costs and operating setup may have different suppliers and dates. A quote can be internally accurate while still representing only part of the cash commitment. [At the end of your building project](https://www.bpc.vic.gov.au/home-owners/home-renovation-and-building-essentials/at-the-end-of-your-building-project) ### Compare how unresolved items will be closed Ask who obtains missing information, when a decision is required and how a change affects the scope, price and programme. A clear route to closing uncertainty is useful evidence when comparing offers; an unsupported promise that nothing will change is not. For a proposed variation, keep the reason, current and revised scope, cost and timing together. CAV provides guidance on written changes to major domestic building contracts. Get the project-specific terms reviewed before relying on an informal message as authority to proceed. [Changing a major domestic building contract](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/changing-a-major-domestic-building-contract) ### Documents to take to the next conversation - The same drawing revision and specification attached to every quote. - An item-by-item inclusion, allowance, exclusion and responsibility matrix. - GST basis, owner-paid costs and the intended completion point. - Open questions with evidence required, owner and due date. ### Questions owners ask #### Is the lowest granny flat quote necessarily the cheapest project? The total alone cannot answer that. Compare the same design, included site and service work, allowances, owner-paid items and completion point. #### How should I compare provisional sums? Compare what each sum covers, the quantity and site assumptions, excluded components and adjustment method. Identify which record will resolve the uncertainty. ## Granny flat site costs: foundations, access and service routes https://e2es.com.au/construction-evidence/site-cost-foundations-service-routes Granny flat site costs depend on how the dwelling meets this particular backyard. The useful question is which site facts the quote relies on, what is still assumed and who closes each gap before the corresponding work is committed. ### Connect the footing proposal to this site’s evidence CAV explains that slope, soil and foundation data affect design and cost. Obtain the relevant report and identify its test locations, date and limitations. A nearby property’s slab or a standard plan is not a substitute for the evidence used for this project. Ask how the footing proposal relates to the intended building location and what further information is needed. Keep engineering, site preparation and existing structures visible in the scope. A quote that assumes clear ground needs a review if the work area contains old foundations or other obstructions. [Foundation data and soil reports](https://www.consumer.vic.gov.au/housing/building-and-renovating/plan-and-manage-your-building-project/foundations) ### Read levels together with the finished access A footprint may fit in plan while the entry, outdoor area and drainage need a different response to the site’s levels. Record proposed finished floor levels, existing ground and the intended connection between the front home and the new dwelling. Do not hide the level problem by flattening the concept drawing. Identify who designs, prices and constructs retaining, steps, drainage and reinstatement where relevant. Trace each item through the quote matrix. When two suppliers meet at the same interface, establish who supplies the final design and who checks that their scopes join. ### Price a route, not just a connection label Show the proposed route from the new dwelling to the relevant water, sewer and other connection points. Note crossings, existing paving, trees, access constraints and the areas that need restoration. A straight line on a map can conceal the work required to build it. South East Water publishes guidance for work near its assets and easements. Confirm the responsible authority for the property and obtain the relevant information for the proposal. The visible position of a pipe or a mapped line does not settle whether nearby work is acceptable. [Work near water assets and easements](https://southeastwater.com.au/building-and-development/water-and-sewer-assets/work-near-assets-and-easements/) ### Check how people, materials and equipment arrive Document the narrowest point, gates, overhead obstacles, storage areas and the route to the work zone. Explain what remains occupied in the front home and which facilities must stay available. A finished pedestrian path and construction access answer different questions. If temporary removals are proposed, include removal, protection, storage and reinstatement responsibilities. Do not assume a neighbouring driveway or common area is available because it would make the build simpler. Any access arrangement needs to be established before it becomes a pricing assumption. ### Reduce uncertainty by work item For each unresolved site cost, record the assumed condition, evidence needed, responsible person and point at which a price becomes firm. Keep the allowance separate from the owner’s reserve. They serve different purposes and combining them can obscure what the builder has priced. As reports and service responses arrive, update the affected line items and keep a revision history. That makes a budget movement explainable: a changed route, revised footing or restoration item. It also helps distinguish new owner choices from conditions that were already part of the original brief. [Building contracts checklist](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/building-contracts); [Changing a major domestic building contract](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/changing-a-major-domestic-building-contract) ### Documents to take to the next conversation - Foundation report and site-level information for the intended location. - Marked service routes, authority questions and restoration areas. - Construction access record, including temporary removals. - Allowances linked to specific missing evidence and scope revisions. ### Questions owners ask #### Why can the same granny flat have different site costs? The dwelling meets different ground, levels, access routes, existing structures and service connections. Compare the evidence and included work for the actual site. #### Does a nearby sewer mean connection costs are settled? No. The route, connection point, relevant authority process, construction constraints and restoration scope still need to be identified. ## Rooming house comparables: was the sale land or a completed building? https://e2es.com.au/construction-evidence/land-sale-vs-completed-rooming-house Rooming house comparables describe a transaction at a particular time. A property operating as a rooming house today may have sold earlier as land or an ordinary home. Compare the asset transferred in that transaction with the completed product you intend to deliver. ### Make the sale event the unit of comparison Start a separate row for each sale: property identity, contract date, recorded price and the asset described at that date. Keep subsequent development and letting on later rows. The same address can represent a land acquisition, a construction project and a completed operating property across its history. If you merge those events into one current-property record, a cheap land purchase can appear to be a cheap completed rooming house. It can also make a later sale look like price growth on an unchanged asset even though the owner funded substantial new work. The timeline prevents both errors. ### Read the advertisement attached to the sale Look for what the sale campaign actually offered: an existing operating property, an old home suitable for redevelopment, vacant land or a site with plans or permits. Record the words supporting the classification and the advertisement date. A proposed room count is not evidence that the rooms existed. Images also need dates and context. A current photograph or street image can show the later building while the price belongs to an earlier transaction. Where the sale material is incomplete, mark the product at sale as uncertain rather than letting the current appearance answer it. ### Use operating evidence without moving it backwards in time Create a timeline of dated letting material, available registration information and other records relevant to operation. Distinguish a property record from an operator licence check: the CAV operator register is a separate source with its own purpose. Later evidence can strengthen an account of the property’s history, but it cannot by itself prove that an earlier sale transferred a completed building. A research rule may allow a stated interval for late evidence; that rule is an analytical choice and can exclude real completed sales as well as remove land transactions. [Rooming house operator public register](https://www.consumer.vic.gov.au/licensing-and-registration/rooming-house-operators/public-register) ### Retain the uncertainty and the excluded cases Use categories such as completed at sale, pre-development sale and unresolved. Keep the reason for exclusion so another reviewer can challenge it. Missing documents and a negative finding should not share the same label. When a comparison changes after new evidence arrives, record the evidence and update the sample count. A transparent small sample is more useful than a larger set silently padded with land or unverified properties. The result should say which asset form it represents. ### Bring the comparable back to your delivery scope Match the selected completed asset with the proposed room arrangement, facilities, building condition and operating setup. A sale showing approved plans speaks to a different risk stage from a property ready for use; it cannot answer the same finished-product question. Keep the market comparison separate from planning, building and operating requirements for your own project. Rooming house minimum standards are an independent check. A sale price, a registration entry or an attractive advertisement does not certify the design you are about to build. [Rooming house minimum standards](https://www.consumer.vic.gov.au/housing/renting/repairs-alterations-safety-and-pets/minimum-standards/rooming-house-minimum-standards) ### Documents to take to the next conversation - One row per sale, with dated asset description and price source. - A timeline separating acquisition, development and operation. - Completed, pre-development and unresolved classification reasons. - A scope match between the selected comparable and the proposed product. ### Questions owners ask #### Can today’s rooming house rent explain an earlier land sale? It describes later operation. Establish what existed and was sold at the earlier transaction date before using that sale as a completed-property comparable. #### Are plans and permits enough to classify a completed rooming house sale? They describe a development position, not necessarily a completed operating asset. Check contemporaneous sale and operating evidence and retain uncertainty where records are incomplete. ## Eight or nine ensuite rooms: define the rooming house comparable product https://e2es.com.au/construction-evidence/eight-nine-ensuite-rooming-house-comparables Eight or nine ensuite rooms is a product description for a rooming house comparison. It is not a legal definition or an approval shortcut. Start with the proposed accommodation and identify records that show whether another property offers the same arrangement. ### Count the accommodation being offered An advertisement’s bedroom field may describe the property loosely. Review the floor plan and dated text to determine how many separately offered rooms existed at the relevant time. Distinguish residents, bedrooms, suites and rooms available for rent; those counts need not be interchangeable. Keep the source for each count. If a room number cannot be verified, label it unknown rather than zero or the target number. Missing values otherwise become invented product matches or disappear from the denominator without explanation. ### Check the bathroom arrangement for each room A property with several bathrooms is not necessarily a property with an ensuite for every room. Look for which room connects to which bathroom, whether access is private or shared, and what the advertisement actually states. Store the verified ensuite count separately from the total bathroom count. Terms such as “studio”, “suite” or “private facilities” need context. Where a plan is unclear, keep a partial or unknown classification. Re-reading the same promotional text with a model does not turn an unclear statement into independent evidence. ### Compare the rest of the operating product Record kitchens, laundry, common spaces, storage, furnishing, access and the division of bills where known. Two ensuite properties can still have different operating arrangements and resident propositions. The comparison should make those differences visible rather than relying on room count alone. Check statutory requirements through the relevant official sources and project advice. CAV publishes rooming house minimum standards covering safety and amenity. Meeting a research product filter is a different question from meeting all applicable requirements. [Rooming house minimum standards](https://www.consumer.vic.gov.au/housing/renting/repairs-alterations-safety-and-pets/minimum-standards/rooming-house-minimum-standards) ### Explain what the chosen filter leaves out A narrow ensuite filter removes shared-bathroom properties that describe a different product, but it also excludes properties whose advertisements omit the relevant detail. Show the number with confirmed product evidence and the number with missing evidence separately. Do not describe an exclusion as proof that the property is inferior or unlawful. It may simply be unsuitable for this comparison. A broader secondary group can help explain the market, provided it remains labelled and is not silently added to the target-product median. ### Translate the product into a deliverable specification For a new build, turn the comparison into a room schedule showing the intended facilities and shared areas. Carry the same schedule into design, quotations and operating preparation. Otherwise the market benchmark and the building contract can end up referring to different products. Confirm use, building assessment and operation independently with the appropriate professionals and authorities. Check property and operator records for the question each answers. A public register search should not be used as a shortcut for judging a new design’s complete compliance. [Rooming house operator public register](https://www.consumer.vic.gov.au/licensing-and-registration/rooming-house-operators/public-register) ### Documents to take to the next conversation - Dated room schedule and source-backed separately offered room count. - Private, shared, partial or unknown bathroom access recorded by room. - Shared facilities and operating arrangement compared explicitly. - Research selection separated from planning, building and operating checks. ### Questions owners ask #### Does eight or nine ensuite rooms define a legal rooming house? No. It describes a selected comparable product. The applicable legal definition and project requirements must be checked separately. #### What if the advertisement does not say every room has an ensuite? Keep the ensuite arrangement unknown or partial unless another reliable record establishes it. Do not infer a full match from the property’s total bathroom count. ## Two bedroom, two bathroom unit comparables: match the building form https://e2es.com.au/construction-evidence/ground-level-two-bedroom-two-bathroom-unit-comparables Two bedroom, two bathroom unit comparables need more than a bedroom filter. A ground-level dwelling, an apartment and a multi-level home can share the same listing label while offering different land, access and ownership arrangements. Define the finished product first. ### Write the proposed product in physical terms Specify rooms, bathrooms, level arrangement, access, outdoor area, parking, approximate age and condition. If the comparison targets a single-level dwelling on the ground, say so. Do not rely on “unit” as a universal physical definition across advertisements. Keep the intended title arrangement separate from the building form. A ground-level dwelling can still have shared land or owners corporation obligations. An attached backyard dwelling and a separately transferable unit answer different ownership questions even when their layouts resemble each other. [Inspect properties before you buy](https://www.consumer.vic.gov.au/housing/buying-and-selling-property/buying-property/inspect-properties-before-you-buy); [Small second homes: planning and building framework](https://www.planning.vic.gov.au/guides-and-resources/strategies-and-initiatives/small-second-dwellings) ### Use evidence to classify the building form Review the relevant floor plan, dated sale description and photographs for internal stairs, upper-level placement and the relationship to the ground. Where the form cannot be established, put the sale in an unverified group rather than describing it as confirmed single level. Exclude or separately label apartments, multi-level products and retirement accommodation if they do not match the question. Record the reason so a reviewer can reproduce the selection. This is a product-matching decision, not a judgment about the value of those other property types. ### Treat external material as a separate evidence field If a study compares a particular external material family, retain the observation and its certainty. Render can conceal the underlying wall system; a photograph of one elevation may not show a mixed-material building. Ask what the source can actually establish. A material filter should explain which target product it is trying to match. It does not establish structural performance, building compliance or replacement cost. Those questions need the relevant specification and project assessment. Avoid turning an image classification into a technical certificate. ### Know where the sale price came from Record the sale date, price source and whether the price was publicly disclosed. Asking prices, unpublished licensed prices, sale-guide ranges and published transaction amounts are distinct evidence types. Keep them distinct in your own comparison sheet. Use only material you are entitled to access and reproduce. A tool may expose a public aggregate without granting permission to republish every underlying record. An auditable source note can be useful without copying a proprietary transaction extract into a public presentation. ### Check the complete scope behind the comparison Compare usable accommodation, outdoor works, condition, services and ownership obligations. If your quote covers a building while the comparable price covers land and a completed property, the figures have different denominators. Write that distinction alongside the numbers. Use the comparable as one input to a feasibility review with documented assumptions. It cannot promise the exit price or establish a separately saleable title for a small second dwelling. Check the project’s intended use and approval position independently. [Small second homes: planning and building framework](https://www.planning.vic.gov.au/guides-and-resources/strategies-and-initiatives/small-second-dwellings) ### Documents to take to the next conversation - Physical product brief including level arrangement and outdoor space. - Confirmed, excluded and unverified building-form groups. - Price type, date and reproducible permitted source note. - Scope and title differences listed next to the comparable. ### Questions owners ask #### Are all two bedroom, two bathroom units comparable? No. Check level arrangement, access, land, condition, outdoor space and ownership structure. Keep other forms separate when they do not match the proposed product. #### Can a unit sale prove a granny flat will sell separately? No. Similar accommodation does not establish the same title or planning position. Victoria’s small second home guidance states that the small second home cannot be subdivided and separately sold from the main home. ## Development comparable evidence: read the sample behind the median https://e2es.com.au/construction-evidence/sold-price-small-sample-evidence Development comparable evidence can look precise because a tool displays a median. Precision in presentation is not the same as breadth of evidence. Before adopting a figure, inspect the transactions, coverage and product filters that produced it. ### A median always belongs to a selected sample Write the sample size beside the median, with the product and date range. A result based on one disclosed sale describes that sale; it does not become a market benchmark by appearing in a chart. A small set needs closer reading of individual differences. Show why each sale is included. If the evidence has mixed building forms, room configurations or pre-development assets, a precise calculation can answer the wrong question. Improve product matching before adding decimal places. [Development Insights: product filters and sample notes](https://premiumrea.com.au/tools/development-insights) ### Distinguish no observed sale from no property A property can exist and remain held without a recent transaction in the selected period. Stock, properties with observed sales and number of sale events are different counts. A property with more than one sale should not silently inflate the count of distinct properties. Record what the source covers and what remains incomplete. If historical collection or enrichment is still in progress, a blank area may reflect the work queue rather than market inactivity. Avoid calling a selected database a complete census unless that coverage has been established. ### Do not turn unknown fields into zero A missing room count, bathroom arrangement, price or building classification is an unknown observation. Substituting zero changes averages, filter membership and the apparent availability of a product. Retain a distinct missing category. Use the same population for a fraction’s numerator and denominator. If the numerator counts confirmed ensuite products, a denominator containing every keyword candidate produces a different measure. Label what the fraction describes before interpreting it as a market signal. ### Align the dates behind price, rent and selling time A sale and a rental advertisement several years apart do not describe one contemporaneous income-and-price observation. Keep each date visible. A later operating record may be relevant context but needs an explicit reason before joining it to a sale. For selling time, distinguish campaign start, contract date, listing appearance and estimated dates. If the campaign record starts after the contract date, do not manufacture an ordinary marketing period from that interval. Missing or inconsistent chronology should stay visible. ### Use a sensitivity range with stated evidence Choose which observed comparisons support the base assumption and which differences justify alternative cases. Keep this reasoning visible in a feasibility sheet. An upside case is a scenario, not a prediction supported merely by the highest observed sale. Bring the construction specification and operating brief back into the review. If the proposed product changes, rerun the comparison rather than preserving a convenient median. Keep source permissions and current filters with the saved result so someone else can reconstruct the decision later. ### Documents to take to the next conversation - Sample size, date range, product filter and source coverage. - Distinct properties separated from sale events and total stock. - Missing fields retained as unknown, with consistent denominators. - Scenario assumptions linked to individual comparisons and differences. ### Questions owners ask #### Does a median from one or two sales establish the market? It summarises that small selected set. Read the transactions, product fit and coverage before treating it as a project benchmark. #### Why can a region have stock but few recent comparable sales? Stock and recent transactions measure different things. Properties may remain held, and source coverage or classification may also be incomplete. ## Rooming house income evidence: room rent is not a whole-building result https://e2es.com.au/construction-evidence/room-rent-vs-whole-building-income Rooming house income evidence has several units: a room, the entire building, a week, a financial period and cash actually collected. Keep those units visible so an attractive room advertisement does not silently become a completed operating result. ### Describe what the rental evidence actually records For each observation, record the room or building, advertised amount, date and stated inclusions. Note whether it is an asking rent, signed agreement, rent roll or collected amount. The same weekly figure can have different meanings depending on the record. Bills, furniture, room size, ensuite access and common facilities can alter the offer. Keep those attributes with the observation when available. Comparing a furnished room with bills to a different accommodation arrangement without saying so weakens the inference. ### Label a full-occupancy calculation as a model Multiplying a selected weekly room rent by a confirmed number of rooms and the assumed letting weeks gives a modelled gross amount. It assumes the chosen rent applies across those rooms and the stated period. A median asking rent does not establish those assumptions. Show them on the calculation: rooms available, rent basis, occupied weeks and concessions. If individual rooms differ, use a room schedule rather than one repeated number. Keep that model separate from advertised whole-building income or a documented operating statement. ### Move from gross potential to cash collected Build the operating view from available agreements and collection records, with vacancies and arrears shown where relevant. Then list the actual or assumed costs, including management, utilities paid by the owner, cleaning, maintenance, insurance and other applicable outgoings. Distinguish operating cash flow from financing and tax outcomes. Interest, principal movements, capital work and tax treatment need their own records and advice. A gross rent figure alone does not establish the cash available to the owner. ### Check income against the transaction date If income evidence is used beside a sale price, keep both dates visible. Later room advertisements may describe a refitted or expanded product. They should not automatically be attached to a sale that preceded the works. A source may state whole-building weekly income while another offers individual rooms. Their aggregates need not agree. Investigate the product, date, occupancy and bill basis before treating the difference as an error or selecting whichever produces the higher result. ### Connect the operating assumptions to the build Use the proposed room and facility schedule to test who supplies furniture, how utilities will be arranged and who handles the shared spaces. These are deliverable and operating questions, not merely spreadsheet rows. Identify responsibilities before handover. Keep the project’s rooming house requirements separate from the income model. CAV’s minimum standards and operator information are starting points for relevant checks. A rent advertisement cannot show that every design and operating requirement has been satisfied. [Rooming house minimum standards](https://www.consumer.vic.gov.au/housing/renting/repairs-alterations-safety-and-pets/minimum-standards/rooming-house-minimum-standards); [Rooming house operator public register](https://www.consumer.vic.gov.au/licensing-and-registration/rooming-house-operators/public-register) ### Documents to take to the next conversation - Dated rent evidence with room/building unit and asking/collected status. - Explicit occupied weeks, room differences and bill inclusions. - Separate gross potential, operating cash flow and financing lines. - An operating setup brief consistent with the proposed construction scope. ### Questions owners ask #### Can I multiply room asking rent by the number of rooms? You can build an explicitly labelled model using stated room count, rent and occupancy assumptions. It is not evidence of collected whole-building income. #### Why might advertised annual rent and gross yield not reconcile? They may use different observations, dates, occupancy assumptions and denominators. Reconstruct each calculation before comparing the outputs. ## Granny flat construction cash flow: map commitments before rental income https://e2es.com.au/construction-evidence/granny-flat-construction-cash-timeline Granny flat construction cash flow is a timeline, not just a total. A project can have an acceptable budget and still need cash earlier than expected. Map when obligations arise and when funds are available before rental income enters the model. ### List commitments by their actual trigger Separate preliminary work, the building contract, owner-appointed advisers, direct purchases and operating setup. For each item, record what authorises the payment and the expected date or milestone. Keep quotes, commitments, invoices and paid amounts as different states. Use the payment terms in the reviewed contract rather than a generic schedule from another project. A calendar based on assumed stages can be misleading if the contract uses different milestones or the owner’s work falls outside them. [Building contracts checklist](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/building-contracts) ### Show funds available beside payments due Record confirmed available cash and any funding arrangements with their own conditions and timing. A proposed facility is not the same as money available for the next payment. Ask the relevant provider and adviser which records are needed for a draw. Keep personal funding choices and lender assessment outside an unsupported website calculation. The project model should expose its assumptions, including when funding is expected, rather than imply that a particular borrowing arrangement is available to every owner. ### Model the cash effect of an unresolved decision A service route, delayed selection or site issue can shift both the work programme and its payments. Keep the reason for the change and update the affected rows. Do not re-date the whole model without showing what moved. Use a separate scenario for a delay and a separate scenario for a scope change. They may have different cash effects. CAV’s contract-change guidance provides the starting point for keeping changes documented; project-specific payment and timing terms still matter. [Changing a major domestic building contract](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/changing-a-major-domestic-building-contract) ### Start rent at the operational milestone Construction completion, possession, readiness to advertise, signed tenancy and first collected rent are different dates. A cash model should not start all rooms at full occupancy merely because the builder reaches the last payment stage. Show completion documentation, outstanding owner work, furnishing where applicable, utility arrangements and letting tasks before the first receipt. The building permit identifies the relevant completion document. Build the operating ramp from explicit assumptions or actual evidence as the project progresses. [At the end of your building project](https://www.bpc.vic.gov.au/home-owners/home-renovation-and-building-essentials/at-the-end-of-your-building-project) ### Review the cash position without relabelling a projection For each period, reconcile opening cash, receipts, payments and closing cash. Keep planned and actual columns so changes remain visible. If the model uses rental assumptions, leave the label in place after exporting a chart or summary. A project-period cash result and an annualised return answer different questions. Where return analysis is needed, use actual dated cash movements and the appropriate professional input. Construction delivery does not turn a scenario into a guaranteed financial outcome. ### Documents to take to the next conversation - Payment triggers and dates from the current contract and supplier terms. - Funding availability and outstanding draw conditions. - Separate timing and scope-change scenarios. - Completion-to-first-rent tasks, with planned and actual cash columns. ### Questions owners ask #### Should rent begin on the final construction payment date? Not automatically. Completion documentation, owner work, operating setup, letting and the first collected payment have separate milestones. #### Why model timing if the total project cost is already known? Timing determines when cash is needed. The same total can create different funding requirements when claims, owner work or first rent move. ## Retain the front home: sequence a backyard granny flat project https://e2es.com.au/construction-evidence/retained-home-backyard-project-sequencing Retaining the front home changes the sequencing of a backyard granny flat project. The existing building, its occupants and its services become part of the brief. Plan the interfaces before treating the new dwelling as an isolated construction job. ### Describe what must remain usable Record whether the front home is occupied, how people enter it, where vehicles and bins go and which services must remain available. Include spaces proposed for temporary storage or access. A plan showing only the new footprint omits the operating environment of the build. Agree communication and access arrangements with the relevant parties before work. The construction programme should show tasks that affect the front home and who coordinates them. Do not assume an occupant’s normal path can become a delivery route without a workable alternative. ### Build a sequence around the constrained interfaces Identify enabling works, protected access, foundation work, structure, service connection, reinstatement and final checks. Mark where an early decision controls later work, such as a service route that will cross a finished path. For each interface, record the incoming condition, the party delivering it and the receiving party’s check. “Electrician after plumber” is less useful than a specific record showing what is ready, what is protected and which drawing revision applies. ### Plan service changes and restoration explicitly Show proposed changes to water, sewer, electricity and communications with their timing and responsibilities. Where an interruption is expected, identify the affected dwelling, temporary arrangement and restoration check. Keep authority requirements and actual connection information with that plan. A shared route or connection arrangement can create ongoing operational questions as well as construction work. Explain the intended bill and maintenance arrangement, then confirm the appropriate technical and contractual response for the property. Do not assume physical proximity answers those questions. [Work near water assets and easements](https://southeastwater.com.au/building-and-development/water-and-sewer-assets/work-near-assets-and-easements/) ### Keep a condition record and a change record Record the relevant existing fences, surfaces, landscaping and structures before work, with dated photographs. Identify what is to remain, be protected, be temporarily removed or be replaced. The before-and-after record supports a clear restoration conversation. If the owner changes the brief, keep the affected scope, cost and sequence together. CAV provides contract variation guidance. An informal request to move a window or path may affect multiple suppliers, so the current plan and approval position need to remain aligned. [Changing a major domestic building contract](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/changing-a-major-domestic-building-contract) ### Close the project across the whole site Handover should cover the new dwelling and the affected parts of the front property: access, drainage, fences, surfaces and service arrangements. List outstanding items by location and responsible party rather than marking the whole project complete because the interior looks finished. Check the relevant completion documentation and the remaining operating tasks. Keep the final plans, certificates, equipment information and restoration record together. That bundle gives the owner and manager a more reliable starting point for maintenance and first occupancy. [At the end of your building project](https://www.bpc.vic.gov.au/home-owners/home-renovation-and-building-essentials/at-the-end-of-your-building-project) ### Documents to take to the next conversation - Front-home occupancy, access and services brief. - Sequence showing interfaces and receiving-party checks. - Dated condition photographs and reinstatement scope. - Whole-site handover list, completion documents and operating records. ### Questions owners ask #### Can the front home remain occupied during the build? That needs a project-specific plan for access, safety, services and communication. State the occupancy requirement early and have the builder and relevant advisers assess it. #### What belongs in handover beyond the new dwelling? Include affected access, fences, drainage, surfaces, service arrangements and reinstatement, with outstanding items assigned to a responsible party. ## Granny flat handover to first lease: close the evidence gaps https://e2es.com.au/construction-evidence/granny-flat-handover-to-first-lease Granny flat handover to first lease is a sequence of separate decisions. A finished room, a builder’s handover, completion documentation and a tenant-ready property are related milestones, but they are not interchangeable. Close the evidence gaps between them. ### Start with the project’s completion requirements The BPC explains that the building permit states whether an occupancy permit or certificate of final inspection is required. Keep the relevant document with the final project records and check unresolved questions with the appointed building surveyor. Do not use a furnished interior photograph or a marketing completion date as a substitute for the required record. Identify the point at which the intended occupation is permitted and the tasks still assigned to the owner, builder or other provider. [At the end of your building project](https://www.bpc.vic.gov.au/home-owners/home-renovation-and-building-essentials/at-the-end-of-your-building-project) ### Separate outstanding work from maintenance Walk the dwelling and affected site with the current scope and record outstanding items by location, description and responsible party. Photograph the issue and preserve the agreed next step. A vague list headed “minor things” is difficult to manage after suppliers leave. Keep completion requirements, contractual defects, owner-selected additions and routine maintenance in separate categories. They follow different responsibilities and dates. Changes to the agreed work should remain connected to the project’s written change record. [Changing a major domestic building contract](https://www.consumer.vic.gov.au/housing/building-and-renovating/checklists/changing-a-major-domestic-building-contract) ### Create a usable record for the owner and manager Assemble final drawings, equipment information, certificates available for the work, contact details and access instructions. Include shut-off locations and the intended service and bill arrangements. Where a record has not arrived, assign the follow-up rather than leaving an empty folder. Show how the new dwelling relates to the front home: entry, bins, parking arrangement where applicable, outdoor areas and shared maintenance. An owner may understand the project history; a future manager or tenant needs an intelligible operating record. ### Advertise the delivered product accurately Use photographs and a description of the actual completed dwelling, with facilities and inclusions that match the operating brief. Label concept images and do not present another project’s image as this property. Keep any remaining work visible when it affects the offer. Ask the appointed manager to assess the relevant rental and readiness requirements and arrange the applicable records before letting. A market rent estimate and a planned launch date are working assumptions, not proof of an achieved tenancy or collected income. ### Track the first lease as an operational result Record the ready-to-market date, advertising date, agreement start and first collected rent separately. If the property needs furniture, cleaning, utilities or unresolved works, put those tasks before the relevant operational milestone. Use the actual sequence to update the cash timeline. A later first receipt changes cash flow even if the total construction price is unchanged. Preserve the difference between asking rent, agreed rent and cash collected so future reviews can compare the original plan with what happened. ### Documents to take to the next conversation - Relevant completion document and final project records. - Outstanding-work list with photographs, categories and responsible parties. - Owner/manager operating bundle and accurate property description. - Separate ready, advertised, agreement-start and first-collected-rent dates. ### Questions owners ask #### Is builder handover the same as ready to rent? Not automatically. Check completion documentation, outstanding scope, operating setup and the applicable rental requirements before treating the property as ready. #### What should the property manager receive? Provide accurate facilities and inclusions, available final records, equipment and access information, service and shared-area arrangements, and outstanding items affecting letting.