Victoria · zones, overlays and siting

Where can you build a granny flat in Victoria?

Since Amendment VC253 a small second dwelling of 60 m² or less is a use that needs no planning permit in almost every Victorian zone that allows a house. What decides your block is not the zone name but four things on top of it: the three Section 1 conditions, the 300 m² construction trigger, the overlays drawn over your land, and the siting rules the building surveyor applies at building-permit stage. This guide walks all four, clause by clause, as they stood in September 2026.

By Joey Don · Co-Founder & CEO, E2ES · Verified 12 September 2026

Short answer

You can build a small second dwelling without a planning permit on almost any Victorian lot that already has one house, sits in a residential, township, low-density, rural living, farming, rural activity, green wedge or urban growth zone, is **over 300 m²** (the trigger exists only in the six urban residential zones), has **no reticulated gas** to the unit, and carries **no overlay that restores the permit** — bushfire, flood, erosion, environmental significance, public acquisition. Heritage, Design and Development and Neighbourhood Character overlays are exempt if the unit stays under 5 m high in muted tones. It is prohibited only in the Commercial 1 Zone. A building permit is always required, and it sits **behind the front wall of the house, 1 m off side and rear fences, clear of easements, within 60 % site coverage**. The map planner applies those distances to your real lot.

The four tests that decide a Victorian block

People search "what zone do I need for a granny flat" as if the zone were the gate. In Victoria it mostly is not. Amendment VC253 (operational 14 December 2023) wrote the **small second dwelling** — a self-contained building of 60 m² or less gross floor area on the same lot as an existing dwelling, with a kitchen sink, food-preparation facilities, a bath or shower, and a toilet and wash basin (Clause 73.03) — into **Section 1** of the table of uses of every zone that allows a dwelling, meaning no permit is needed for the *use*. What sits in front of you instead are four separate tests, and a block has to pass all four to stay on the no-planning-permit pathway.

**Test 1 — the Section 1 conditions.** Identical wording in every zone: there must be no more than one dwelling existing on the lot; the small second dwelling must be the only one on the lot; and reticulated natural gas must not be supplied to it (electric cooking and hot water, in other words). Fail one and the use drops to Section 2 — a planning permit.

**Test 2 — the 300 m² construction trigger.** Since VC282 (operative 8 September 2025) the General, Neighbourhood, Residential Growth, Mixed Use, Housing Choice and Transport and Township zones say: "A permit is required to construct or extend a small second dwelling on a lot of less than 300 square metres." That is the only lot-size number in the planning scheme. It is a trigger, not a prohibition — below 300 m² the application is assessed against Clause 54 and is VicSmart where the listed standards are met. The 550–600 m² "minimum" repeated online is a builder's rule of thumb, not law.

**Test 3 — the overlays.** An overlay can put the permit back regardless of the zone. The bushfire, flood, erosion, environmental-significance and public-acquisition overlays do; the character overlays give a conditional exemption; several do nothing to a small second dwelling at all. The full table is below.

**Test 4 — siting at building-permit stage.** Even with no planning permit, the Building Regulations 2018 decide where the unit can stand: behind the front wall of the house, 1 m off the side and rear boundaries, 60 % site coverage, 20 % permeability, a 1 m clear path from the street, private open space for both dwellings, and the National Construction Code's 1.8 m fire separation. Where a rule cannot be met, council can dispense with it under Minister's Guideline MG-12 after hearing the neighbour. A building permit from a registered building surveyor is always required — there is no exception.

Definition≤ 60 m² gross floor area, self-contained, same lot as an existing dwelling — Clause 73.03
Section 1 conditionsOne existing dwelling · only one small second dwelling · no reticulated gas
300 m² triggerConstruction permit below 300 m² in GRZ/NRZ/RGZ/MUZ/HCTZ/TZ only (VC282)
AlwaysA building permit from a registered building surveyor; an occupancy permit before anyone moves in
NeverSubdivision or separate sale of the unit — a permit "must not be granted" (every zone)
Not neededCar parking for the unit (Clause 52.06-1; reg 78(7))

Zone by zone — where the use is as-of-right, and where it is not

The table reads every zone's table of uses as it stood in September 2026. "No use permit (Section 1)" means the small second dwelling use needs no planning permit provided the three conditions above are met; the last column carries the extra condition some zones add — most often that the lot is connected to reticulated sewerage where available (otherwise an EPA-regulated on-site system), potable water and electricity. Only the six urban residential zones carry the 300 m² construction trigger; the rural and low-density zones instead police setbacks from roads, waterways and neighbours, and the Farming Zone keeps two small second dwellings in different ownership at least 100 m apart.

Read from the Victoria Planning Provisions zone tables (Section 1 conditions), verified 12 September 2026.
ZoneNameSmall second dwelling usePermit below 300 m²?Notes
GRZGeneral Residential ZoneNo use permit (Section 1)YesSection 1 use (no permit) where the three conditions are met; a permit to construct only on a lot under 300 m². Max building height 11 m / 3 storeys (32.08-11).
NRZNeighbourhood Residential ZoneNo use permit (Section 1)YesAs GRZ.
RGZResidential Growth ZoneNo use permit (Section 1)YesAs GRZ.
MUZMixed Use ZoneNo use permit (Section 1)YesAs GRZ.
HCTZHousing Choice and Transport ZoneNo use permit (Section 1)YesAs GRZ (32.10-4).
TZTownship ZoneNo use permit (Section 1)YesPlus the 32.05-3 services condition (reticulated sewer if available, else EPA on-site system; potable water; electricity).
LDRZLow Density Residential ZoneNo use permit (Section 1)No triggerSection 1 with the 32.03-2 services condition; no sub-300 m² trigger (VC282 excluded LDRZ). Buildings and works permit only for Section 2 uses.
RLZRural Living ZoneNo use permit (Section 1)No triggerSection 1 with the 35.03-2 services condition and 500 m from a mineral-resources work authority; buildings-and-works permit only inside the zone's road / waterway / schedule setbacks.
FZFarming ZoneNo use permit (Section 1)No triggerSection 1 with services, 1 km from a wind-energy facility, 500 m from a work authority; buildings and works permit inside the setbacks, and a small second dwelling must be 100 m from a small second dwelling not in the same ownership (35.07-4).
RAZRural Activity ZoneNo use permit (Section 1)No triggerSection 1 with the 35.08-2 services condition; setback triggers apply.
RCZRural Conservation ZoneNo use permit (Section 1)No triggerSection 1 with the 35.06-2 services condition; setback triggers apply. Councils with a blanket ESO over conservation land (e.g. Cardinia) advise that a permit is usually needed in practice.
GWZGreen Wedge ZoneNo use permit (Section 1)No triggerSection 1 with the 35.04-2 condition: all-weather road for emergency vehicles, sewer or EPA wastewater, potable water including fire-fighting storage, electricity.
GWAZGreen Wedge A ZoneNo use permit (Section 1)No triggerAs GWZ (35.05-2).
UGZUrban Growth ZoneNo use permit (Section 1)No triggerSection 1 with services + all-weather access (37.07-2); the applied-zone provisions of the precinct structure plan may add controls (37.07-11).
C1ZCommercial 1 ZoneProhibited"Small second dwelling" is listed under Section 3 — Prohibited (34.01).
C2ZCommercial 2 ZoneConfirm with councilNo small second dwelling row; the Accommodation rules of the zone govern — confirm with council.
PUZPublic Use ZoneConfirm with councilNo small second dwelling provision — public land, confirm with the land manager.

Two practical readings. In the rural and green-wedge zones the use is as-of-right on the clause text, but councils with a blanket Environmental Significance Overlay over conservation land — Cardinia is one — advise that a planning permit is usually needed in practice, because the overlay, not the zone, brings it back. And in the Low Density Residential Zone there is no 300 m² trigger at all, but the unit must connect to reticulated sewerage where it exists, or to an on-site wastewater system that council has consented to under Building Regulations reg 132.

See the 1 m setbacks and the compliant footprint on your own lot →

Is your block on the no-permit pathway? Get it in writing — free.

Place a unit on the map first, then book a free site assessment: we read the zone, the overlay schedules, the title and the sewer plan and confirm the pathway before any contract.

Overlay by overlay — which ones bring the permit back

An overlay is a second layer drawn over the zone that flags one attribute of the land. VC253 treated the overlay families very differently. The environmental-risk overlays — bushfire, flood, erosion, salinity, environmental significance, public acquisition — kept their buildings-and-works permit trigger in full. The character overlays — Heritage, Design and Development, Neighbourhood Character — were softened with a tailored exemption: no permit if the building is not more than 5 m high and is finished in muted tones and colours. Several overlays do nothing to a small second dwelling. Every row below carries the clause so you can read it yourself; the schedule behind an overlay can vary the default, which is why we check the schedule text at the free site assessment rather than the map colour.

OverlayNameEffect on a new small second dwellingClauseWhat it says
BMOBushfire Management OverlayPermit required44.06-2 (VC248, 5 May 2026)A permit is required to construct a building or carry out works associated with Accommodation; only an alteration/extension of an existing dwelling or small second dwelling by up to 50 % of its floor area is exempt. Bushfire hazard site assessment (AS 3959:2018), landscape assessment and bushfire management statement; Clause 53.02 applies.
HOHeritage OverlayConditionally exempt43.01-3 (VC253)No permit if the building height does not exceed 5 m and the building is finished in muted tones and colours; demolition, tree and fence triggers in 43.01-1 still apply.
DDODesign and Development OverlayConditionally exempt43.02-2 (VC307, 20 Apr 2026)Same 5 m + muted-tones exemption as the Heritage Overlay; otherwise a permit.
NCONeighbourhood Character OverlayConditionally exempt43.05-2; 43.05-3 (VC282/VC292)Same 5 m + muted-tones exemption; the schedule may modify the Clause 54 standards.
LSIOLand Subject to Inundation OverlayPermit required44.04-2 (VC253)A permit is required to construct a building or carry out works unless the schedule exempts; only decks and pergolas up to 800 mm attached to a small second dwelling are exempt.
SBOSpecial Building OverlayPermit required44.05-2 (VC288, 16 Oct 2025)Permit required, same pattern as LSIO; Melbourne Water referral.
FOFloodway OverlayPermit required44.03-2Permit required; new dwellings in a floodway are generally not supported.
ESOEnvironmental Significance OverlayPermit required42.01-2 (VC288)Permit for buildings and works unless the schedule states one is not required; small second dwelling outbuildings and tanks are VicSmart (59.05).
SLOSignificant Landscape OverlayPermit required42.03-2; 59.05Permit unless the schedule exempts; constructing a small second dwelling is a VicSmart class.
VPOVegetation Protection OverlayUnaffected42.02-2Unaffected unless vegetation is removed, destroyed or lopped.
EMOErosion Management OverlayPermit required44.01-2 (VC253)Permit required unless the schedule exempts.
SMOSalinity Management OverlayPermit required44.02-2Permit required (same structure); outbuildings VicSmart.
EAOEnvironmental Audit OverlayAudit precondition45.03-1Not a permit trigger but a precondition: a preliminary risk screen / audit statement or certificate must issue before buildings and works for a sensitive (residential) use commence.
PAOPublic Acquisition OverlayPermit required45.01-1 (VC253)Permit required to construct a building.
DCPODevelopment Contributions Plan OverlayUnaffected45.06-1; VC249 (14 Jan 2024)No permit trigger; VC249 exempted development for a small second dwelling from DCP levies by re-incorporating each DCP — check the specific plan.
DPODevelopment Plan OverlayUnaffected43.04-2No independent trigger; if a permit is otherwise needed it must be generally in accordance with the plan.
IPOIncorporated Plan OverlayUnaffected43.03-1As DPO.
POParking OverlayUnaffected45.09-3; 52.06-1Clause 52.06 does not apply to a small second dwelling.
RORestructure OverlayPermit required45.05-2Permit required to construct or extend a dwelling or other building; reticulated sewer required if available.
AEOAirport Environs OverlayConditionally exempt45.02-1, 45.02-2No buildings-and-works trigger, but any new building must meet AS 2021-2015 noise attenuation and the schedule requirements.
MAEOMelbourne Airport Environs OverlayConditionally exempt45.08-1Any requirement in the schedule must be met.
SCOSpecific Controls OverlayPermit required45.12-1Governed entirely by the incorporated document.

The Bushfire Management Overlay is the one that most often changes a Melbourne-fringe project: since VC248 (5 May 2026) any new building for accommodation in the BMO needs a permit with a bushfire hazard site assessment to AS 3959, a landscape assessment and a bushfire management statement — and the unit is then built to its bushfire attack level. The Development Contributions Plan Overlay is the one most often mistaken for a ban: it is a levy overlay, and VC249 (14 January 2024) exempted small second dwelling development from DCP levies by re-incorporating each plan. Our overlays guide and heritage guide go deeper on each.

Siting — where the unit can stand on the lot

This is the part most guides skip and the part that decides whether your backyard actually works. Two instruments say almost the same thing. Where no planning permit is needed, the **Building Regulations 2018** (Division 2 of Part 5, which since VC253 expressly covers "a single Class 1 building, including a small second dwelling") govern siting at building-permit stage. Where a planning permit is needed — a lot under 300 m², or an overlay — **Clause 54** of the planning scheme applies the parallel standards. The numbers are the same for the rules that matter on a 30 or 60 m² unit.

RuleRequirementSource
Behind the front wallThe small second dwelling is set back behind the front wall of the existing dwelling facing the front street; porches, verandahs, pergolas, eaves, gutters, screens and decks over 800 mm must not encroach.Building Regulations 2018 reg 74A; planning Clause 54.02-8 Standard A2-8 (VC282)
Side and rear setback1 m for walls up to 3.6 m high; plus 0.3 m for every metre of height over 3.6 m up to 6.9 m; 2 m plus 1 m per metre over 6.9 m.Building Regulations 2018 reg 79, Table 79; Clause 54 Standard A2-3
Walls on boundariesWithin 200 mm of a side or rear boundary: length no more than the abutting wall or 10 m plus 25 % of the remaining boundary; average height 3.2 m, maximum 3.6 m.Building Regulations 2018 reg 80
Site coverageBuildings must not occupy more than 60 % of the allotment (zone schedule may vary) — applies to the two buildings together (reg 76(5)). Where a planning permit is needed, Clause 54 Table A2-5 applies 60 % NRZ/TZ, 65 % GRZ, 70 % RGZ/MUZ/HCTZ.Building Regulations 2018 reg 76; Clause 54.03-2 Table A2-5
PermeabilityAt least 20 % of the allotment must have a permeable surface.Building Regulations 2018 reg 77
Garden area25 % (400–500 m²), 30 % (500–650 m²), 35 % (over 650 m²) where the zone requires it (GRZ/NRZ).Building Regulations 2018 reg 76A
Building heightZone/schedule height, else 10 m on a slope of 2.5° or more and 9 m otherwise; GRZ max 11 m / 3 storeys.Building Regulations 2018 reg 75; Clause 32.08-11
Private open spaceThe existing dwelling keeps at least 25 m² with a 3 m minimum dimension; the small second dwelling gets at least 8 m² with a 1.6 m minimum dimension and access from a habitable room other than a bedroom.Building Regulations 2018 reg 86(2)(b), reg 86A
Access pathA clear unobstructed path from the front street at least 1 m wide (1.8 m if longer than 30 m), 2 m clear height, gradient no steeper than 1:14, cross-fall 1:40, sealed or all-weather.Building Regulations 2018 reg 86B; Clause 54 Standard A3-5
Car parkingNone required for a small second dwelling.Building Regulations 2018 reg 78(7); Clause 52.06-1
Fire separationAn external wall within 1.8 m of another building on the same allotment (or 900 mm of a side/rear boundary) must achieve FRL 60/60/60 or be 90 mm masonry.NCC 2022 Vol 2 H3D3; Housing Provisions 9.2.1, 9.2.3
Easements and water assetsNo structure over an easement in favour of a water authority, or within 1 m laterally of any other authority's works (5 m for Melbourne Water), without the authority's consent — whether or not an easement is registered.Water Act 1989 s 148(1); Building Regulations 2018 reg 130
StormwaterThe council's report on the legal point of discharge must be obtained before the building permit.Building Regulations 2018 reg 133
SepticA septic tank installation or alteration needs council report and consent unless an EPA permit exists.Building Regulations 2018 reg 132
Report and consentEach siting regulation carries its own council report-and-consent power; council must apply Minister's Guideline MG-12 and give the adjoining owner an opportunity to comment.Building Act 1993 s 188A and Schedule 2 clause 4A; Gazette S677 (MG-12)

The rule people find on the day the surveyor visits is **reg 74A**: the unit must sit behind the front wall of the existing house — not beside it in the front garden, not forward of it on a corner. The rule people find on the plan of subdivision is the **easement**: a sewer or drainage easement through the backyard cannot be built over without the water authority's consent, and under Water Act s 148 the same applies within 1 m of any water authority works (5 m for Melbourne Water) whether or not an easement is registered; build-over consent is discretionary and routinely refused for habitable rooms. Our map planner draws your lot, every registered easement and the house from the state cadastre, keeps the unit 1 m off fences, 1 m off easements and 1.8 m from the house (1 m on the fire-rated short wall of our modules), and places it behind the house — so you see the compliant footprint before anyone quotes.

The title layer — covenants, Section 173 agreements, owners corporations

None of the tests above can see your title. A **restrictive covenant** — very common in estates built from the 1990s on, "not more than one dwelling shall be erected on the lot" — binds regardless of the planning exemption; a single-dwelling covenant will stop a granny flat until it is removed or varied by a planning permit under Clause 52.02, by the Supreme Court, or by a planning scheme amendment. A **Section 173 agreement** registered on title can do the same. Both are read at the free site assessment, which is why the easements and covenants guide is worth ten minutes before you spend anything. Lots inside an owners corporation add the OC's own rules on top; no state source addresses them specifically, so treat them as a case-by-case check.

Who can live in it, and what you cannot do with it

There is no occupancy test. Cardinia's fact sheet puts it plainly: "There are no limitations on occupation … it can be rented to a third-party"; Latrobe: "Anyone can live in it or rent it out." The old dependent person's unit — a movable building for a person dependent on a resident of the house — survives only in transitional Clause 52.04, which switches off after 28 March 2027. What you cannot do is subdivide or sell the unit separately: every zone says a permit "must not be granted" to create a separate lot for land containing a small second dwelling. And once it is let, the utilities and bills guide explains the meter question that decides whether the tenant pays their own power and water.

What Melbourne councils add in practice

The planning and building rules are state-wide, but councils add three things worth knowing. First, **street numbering**: a separately let unit needs its own address for the electricity retailer and the post — councils allocate it under AS/NZS 4819 (Whitehorse: "20A will occur between number 20 and number 22"; Cardinia and Latrobe: ask the rates team). Second, **local laws**: most metro councils require an asset protection permit before works start (Monash, Whittlesea, Frankston, Casey, Mornington Peninsula), and several protect canopy trees on private land above a trunk circumference (Glen Eira 140 cm, Bayside 155 cm at 1 m, Boroondara 110 cm at 1.5 m) — a tree in the backyard can move the unit. Third, **stormwater**: the council's report on the legal point of discharge (reg 133) must be in hand before the building permit issues, and the unit's roof water has to reach it.

How E2ES runs the four tests for you

Start with the free address check (zone, overlays, lot size from the planning maps in 30 seconds) or go straight to the map planner, which draws the lot, easements and house and places a 30 m² and a 60 m² unit where the Building Regulations allow. Then book the free site assessment: we pull the title for covenants and Section 173 agreements, read the overlay schedules rather than the map colours, check the sewer plan and the legal point of discharge, and confirm the pathway in writing — no planning permit and straight to a building permit, or a planning permit first — before any contract. On an exempt lot the paperwork stage is about a month; overlay and rural lots follow the permit pathway with timing confirmed in writing after the assessment.

Primary sources

Frequently asked questions

Important information

This guide summarises publicly available Victorian planning and building law as at 12 September 2026, with links to the primary sources. E2ES is a builder, not a law firm, town planner or licensed conveyancer — nothing here is legal or planning advice, and it is not a substitute for advice on your specific lot. Overlay schedules vary by council and by schedule number; covenants, Section 173 agreements and easements sit on the title, not the planning maps; and the Building Regulations siting rules are applied by the relevant building surveyor at permit stage. Verify the current position for your lot before you commit money.

Is your block on the no-permit pathway? Get it in writing — free.

Place a unit on the map first, then book a free site assessment: we read the zone, the overlay schedules, the title and the sewer plan and confirm the pathway before any contract.

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