Evidence before the next building decision
Granny flat construction evidence for Victorian owners: organise site records, compare quote scope, test completed-property comparables and connect handover to the first lease.
By Yan Zhu · Co-Founder & Chief Data Officer
Published and reviewed ·
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.
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.
12 guides
Site and design
Build a granny flat site evidence pack that separates title, planning, measured geometry, services and owner intentions before a design or quote is treated as ready.
Read the guideSite and design
Understand missing building footprints, misplaced address pins and fragmented roofs in backyard feasibility, and choose the evidence needed before treating a map result as usable space.
Read the guideScope and delivery
Compare granny flat quotes using the same drawing revision, inclusions, site work, service routes, allowances and delivery milestones before choosing a headline price.
Read the guideScope and delivery
Trace granny flat site costs to foundation data, levels, access, water assets and reinstatement rather than treating every backyard as a standard site.
Read the guideComparable evidence
Assess a rooming house comparable at its sale date using contemporaneous advertisements, operating evidence and a property timeline before comparing it with a new build.
Read the guideComparable evidence
Compare an eight or nine room ensuite product with evidence of room count, bathroom access, shared facilities and operation, while keeping research filters separate from legal definitions.
Read the guideComparable evidence
Build a two bedroom, two bathroom unit comparable set that distinguishes ground-level dwellings from apartments, multi-level homes and retirement products before judging sale evidence.
Read the guideComparable evidence
Read development comparable evidence using product fit, sample size, date coverage, stock versus sales and missing values before using a median as a project assumption.
Read the guideCash flow and operation
Separate asking room rent, whole-building advertised income, collected rent and operating costs before using rooming house income evidence in a feasibility model.
Read the guideCash flow and operation
Build a granny flat construction cash flow timeline showing progress claims, owner-paid work, funding, delays and the separate starting point for collected rent.
Read the guideScope and delivery
Plan a retained-home backyard project around construction access, existing occupancy, service changes, reinstatement and the evidence needed at each handover between trades.
Read the guideCash flow and operation
Connect granny flat handover to first lease with completion documents, defects, operating setup, accurate advertising, management records and a realistic first-rent timeline.
Read the guideConsumer Affairs Victoria · Source checked
Planning Victoria · Source checked
Planning Victoria · Source checked
South East Water · Source checked
Consumer Affairs Victoria · Source checked
Building and Plumbing Commission · Source checked
Consumer Affairs Victoria · Source checked
Consumer Affairs Victoria · Source checked
Consumer Affairs Victoria · Source checked
Consumer Affairs Victoria · Source checked
PremiumREA · Source checked
Yan Zhu. E2ES. Granny flat construction evidence and development comparisons. 2026-10-09.
https://e2es.com.au/construction-evidenceOriginal text: CC BY 4.0 with attribution. Gallery photographs and linked material retain their existing rights; they are outside this text licence.
Compare product-specific market evidence on PremiumREA. Check the current filters, dates and sample size before using a result.
Explore Development InsightsShare the site records and unresolved scope questions so the next step starts with a clear brief.
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