Can You Put a Granny Flat on Your Block in Victoria? (2026 Rules)

In most Victorian residential zones, yes: you can build one small second dwelling of up to 60 square metres on a block that already has a home, without a planning permit — provided your lot is 300 square metres or more, no overlay applies, and the dwelling meets the siting standards. A building permit is always required. Since Amendment VC253 (14 December 2023) opened this pathway, further changes in 2025 have reshaped the details — and they decide whether your block qualifies.

For developers, these changes mean faster approval pathways and reduced upfront costs when projects meet the exempt criteria. However, properties affected by flooding overlays, environmental controls, or heritage restrictions still require planning permits through the standard council process. Understanding which sites qualify for the streamlined pathway and which require traditional approvals determines project feasibility and timelines.

The regulatory framework extends beyond permit exemptions to include specific siting requirements, ResCode compliance, occupancy restrictions, and design standards that affect development viability. Custom granny flat builders across Victoria have adapted their designs to align with these provisions, though developers must navigate the requirements independently for each site and council area.

Does Your Block Qualify? The Five Checks

Whether you can use the no-permit pathway comes down to five things, all checkable before you spend money on design:

• 1. Your zone. The pathway applies in the main residential zones (General Residential and Neighbourhood Residential among them) and most rural zones. Commercial and industrial zones are a different story.
• 2. Your lot size. On lots of 300 square metres or more, no planning permit is needed to build the dwelling. On lots under 300m², a permit is required — but since Amendment VC282 (September 2025) it can qualify for the fast VicSmart pathway if it meets the Clause 54 siting standards.
• 3. Overlays. Heritage, flooding, environmental, bushfire and similar overlays can require a permit regardless of size. This is the check most owners miss.
• 4. The use conditions. There must be only one existing dwelling on the lot, only one small second dwelling, and — a detail that surprises many people — reticulated natural gas must not be supplied to the granny flat (an all-electric requirement written into the zone rules).
• 5. Room to build. The garden area rules apply to constructing a granny flat: on lots of 400–500m² at least 25% of the lot must remain garden area, 30% above 500m², and 35% above 650m² — alongside site coverage and height limits.

You can check the first three for your own address in about two minutes with our free property check, or start from the homeowner guide to what your block allows.

Understanding Granny Flats in Victoria

Victoria’s planning framework distinguishes between small second homes up to 60 square metres and dependent person’s units, each serving different purposes with varying regulatory requirements under the state’s planning provisions.

Definition of a Granny Flat

A granny flat, now formally termed a small second home in Victoria’s planning provisions, is defined in the planning scheme as a building with a gross floor area of 60 square metres or less, on the same lot as an existing dwelling, used as a self-contained residence — which must include a kitchen sink, food preparation facilities, a bath or shower, and a toilet and wash basin. These structures are also known as secondary dwellings, accessory dwelling units (ADUs), or small second dwellings.

Following Amendment VC253 implemented on 14 December 2023, the Victoria Planning Provisions and all planning schemes were updated to streamline approval processes. A small second home typically doesn’t require a planning permit in most residential and rural zones, provided there are no flooding, environmental, or special planning controls affecting the property.

These dwellings must remain attached to the primary title and cannot be subdivided or separately sold. A building permit from the relevant Building Surveyor is always required, regardless of planning permit exemptions.

What Happened to Dependent Person’s Units?

Before the 2023 reforms, the usual way to add a granny flat was a dependent person’s unit: the occupant had to be dependent on a resident of the main dwelling, and councils commonly required the unit to be removed when that person moved on. The small second dwelling pathway replaced that model. Under the current definition, a small second dwelling of up to 60 square metres carries no family or dependency restriction on who occupies it — it may house relatives or be rented, subject to normal tenancy law.

If your property has an existing unit under the old arrangements (often recorded through a Section 173 Agreement on title), the agreement keeps operating until it is dealt with — worth checking before you plan around the building.

Types of Granny Flats

Granny flats in Victoria range from compact studios to multi-bedroom custom granny flats designed for various purposes. Studio configurations typically feature open-plan living with integrated kitchen, bathroom, and sleeping areas within 30 to 40 square metres.

One-bedroom granny flats provide separate sleeping quarters and remain popular for elderly parents or rental accommodation. Two-bedroom layouts maximise the 60 square metre limit, accommodating small families or generating higher rental returns for property developers.

Common configurations include:

• Studio cabins: Open-plan design with minimal separation
• One-bedroom units: Separate bedroom, living area, kitchen, and bathroom
• Two-bedroom layouts: Maximum occupancy within 60 square metre framework
• Backyard granny flats: Detached structures positioned behind the primary dwelling

Each type must comply with building regulations including 7-star energy ratings and relevant ResCode standards under the Building Permit application process.

Key Regulations and Legal Requirements

Victoria’s granny flat regulations involve two distinct approval pathways: planning permits may not be required for small second homes up to 60 square metres in most residential zones, while building permits remain mandatory for all constructions. The building surveyor verifies compliance with the National Construction Code and building regulations.

Planning Permit Rules

Following Amendment VC253 implemented in December 2023, planning permit requirements for small second homes changed significantly. A planning permit is typically not required for dwellings up to 60 square metres on lots in residential and most rural zones where no overlays apply.

Properties with specific overlays including Heritage Overlay, Environmental Significance Overlay, or Land Subject to Inundation Overlay still require a planning permit regardless of size. The Victoria Planning Provisions define these controls across all planning schemes.

The dwelling cannot be subdivided onto its own title: since Amendment VC288 (16 October 2025) the zone rules direct that a subdivision permit must not be granted to create a separate lot for land containing a small second dwelling. And even where no planning permit is needed, the Clause 54 siting standards still apply to the design — including a setback standard written specifically for small second dwellings and a safety and accessibility standard.

Building Permit Process

A building permit remains mandatory for all granny flats in Victoria, regardless of planning permit status. Property owners must engage a registered building surveyor to assess the application and ensure compliance with building regulations.

The building surveyor reviews documentation including site plans, floor plans, elevations, and energy efficiency reports. They verify the proposal meets siting requirements, amenity standards, and structural safety provisions before issuing the building permit.

Building permit applications require detailed specifications covering construction methods, materials, drainage, and services connections. The building surveyor conducts mandatory inspections at key construction stages including footings, frame, and final completion to verify compliance throughout the build process.

Building Regulations and National Construction Code

Victoria’s building regulations align with the National Construction Code (NCC), establishing minimum standards for construction, energy efficiency, and safety. Small second homes must achieve a 7-star energy rating under current NCC requirements.

The Building Regulations 2018 were amended specifically to accommodate small second dwellings, creating streamlined approval processes while maintaining safety standards. Granny flats must comply with structural provisions, fire safety measures, weatherproofing, and health and amenity requirements outlined in the NCC.

Liveable housing design standards apply to certain small second homes, requiring accessible features including step-free entries and wider doorways. The building surveyor verifies NCC compliance through plan assessment and site inspections before issuing occupancy permits.

Zoning, Location, and Site Requirements

Small second homes up to 60 square metres may be built on most residential and rural properties in Victoria without a planning permit, though building permits remain mandatory. Location, zoning, and site-specific constraints determine whether a planning permit is required.

Eligible Zones in Victoria

Small second homes can typically be constructed without a planning permit in Neighbourhood Residential Zone (NRZ), General Residential Zone (GRZ), Residential Growth Zone (RGZ), Township Zone, and Low Density Residential Zone (LDRZ). These zones cover most residential areas across Melbourne and regional Victoria.

Rural zones including Farming Zone (FZ) and Rural Living Zone (RLZ) also permit small second homes without a planning permit in most circumstances. The Rural Conservation Zone (RCZ) may allow development subject to specific planning scheme requirements.

Properties in Commercial, Industrial, or Special Use Zones typically require a planning permit for any dwelling. Mixed Use Zones could allow small second homes, though planning permit requirements vary based on the specific planning scheme provisions.

Amendment VC253, introduced in December 2023, streamlined these provisions across all Victorian planning schemes. The reforms removed planning permit requirements for small second homes up to 60 square metres in eligible zones, provided no overlays or site constraints apply.

Lot Size, Overlays, and Site Coverage

Properties must have a minimum lot size of 300 square metres to construct a small second home without a planning permit. This requirement ensures adequate space for both dwellings while maintaining appropriate site coverage and open space ratios.

Overlays substantially affect planning permit requirements. Properties subject to Heritage Overlay (HO), Design and Development Overlay (DDO), Environmental Significance Overlay (ESO), Bushfire Management Overlay (BMO), or Land Subject to Inundation Overlay (LSIO) typically require planning permits regardless of dwelling size.

The Bushfire Attack Level (BAL) rating determines construction standards in bushfire-prone areas. Properties with BAL ratings may proceed without planning permits if the small second home complies with building regulations, though higher BAL ratings increase construction costs and design constraints.

Site coverage limits vary by zone: 60% in Neighbourhood Residential and Township zones, 65% in General Residential, 70% in Residential Growth, Mixed Use and Housing Choice and Transport zones. The combined gross floor area of both dwellings must not exceed planning scheme maximums. Most zones require minimum open space of 20% to 40% of the site, calculated as permeable landscaped area.

Car Parking and Access Requirements

Standard car parking requirements apply to small second homes. Most planning schemes require one car space per dwelling, meaning properties need two spaces total when adding a small second home to an existing dwelling.

Properties in inner Melbourne may have reduced parking requirements under specific planning scheme provisions. Areas well-served by public transport or within Principal Public Transport Network boundaries could qualify for parking reductions or exemptions.

Vehicle access must comply with relevant standards for width, gradient, and clearance. Shared driveways serving both dwellings must provide adequate width, typically 3 metres minimum for single-lane access or 5.5 metres for dual-lane. Properties without existing crossovers may require VicRoads or council approval for new vehicle access points.

Tandem parking arrangements where vehicles park behind one another are commonly accepted for small second homes. This configuration reduces site coverage while meeting parking obligations, though it requires coordination between occupants of both dwellings.

Design and Construction Considerations

Building a granny flat in Victoria requires careful attention to design layouts, energy performance standards, and accessibility requirements. Victoria’s planning and building systems have changed to streamline approvals while maintaining safety and amenity standards through the building permit process.

Popular Granny Flat Designs

Modern granny flats typically feature open plan living arrangements that maximise the usable space within the 60 square metre limit. Common layouts include one or two-bedroom configurations with combined kitchen, dining, and living areas that create a sense of spaciousness.

Custom granny flat designs often incorporate:

• Studio layouts (30-45m²): Single open space with bathroom and kitchenette
• One-bedroom designs (45-55m²): Separate bedroom with open living area
• Two-bedroom layouts (up to 60m²): Compact bedrooms with shared living zones

Contemporary granny flat design emphasises natural light through strategic window placement and higher ceilings where possible. Privacy considerations between the primary dwelling and the granny flat influence window orientation, screening elements, and entrance locations. Developers typically position entry points to minimise overlooking and maintain separate circulation paths.

The building permit process assesses siting requirements including setbacks, building height, and site coverage. These standards ensure the granny flat integrates appropriately with the existing dwelling while meeting amenity requirements for neighbouring properties.

Energy Efficiency and Insulation

All granny flats in Victoria must achieve a minimum 7-star energy efficiency rating under current building regulations. This requirement applies regardless of whether a planning permit is needed and forms part of the mandatory building permit assessment.

Key energy efficiency elements include:

Component	Requirement
Wall insulation	R-value compliant with climate zone
Ceiling insulation	Higher R-value than walls
Glazing	Double glazing or compliant alternatives
Air sealing	Minimised thermal bridging

Insulation specifications vary based on Victoria’s climate zones, with Melbourne typically requiring higher performance than coastal areas. Ceiling insulation generally requires R4.0 or higher, while wall insulation ranges from R1.5 to R2.5 depending on construction type.

Energy efficiency impacts both construction costs and ongoing operational expenses for occupants. Developers may exceed minimum standards to improve rental appeal or long-term asset value. Solar panel readiness, efficient hot water systems, and LED lighting further enhance energy performance.

Accessibility and Livable Housing Standards

Granny flats constructed under the streamlined planning provisions must meet specific accessibility criteria established through the building regulations. These standards ensure the dwelling can accommodate residents with varying mobility needs.

The Building Regulations 2018, as amended for small second homes, require step-free access from the street or driveway to the main entrance. This typically involves ramped entries or flush thresholds that eliminate level changes.

Minimum accessibility features include:

• Level or ramped access to entrance (maximum 1:14 gradient)
• Doorways with minimum 850mm clear opening width
• Circulation spaces allowing wheelchair manoeuvrability
• Accessible bathroom facilities with appropriate clearances

Livable housing design principles extend beyond minimum compliance for developers targeting diverse tenant markets. Reinforced bathroom walls for future grab rail installation, lever door handles, and accessible light switches represent cost-effective inclusions during construction that avoid expensive retrofitting.

The building permit application process requires documentation demonstrating compliance with accessibility standards. Building surveyors assess plans against the Building Code of Australia requirements specific to Class 1a dwellings, which govern residential construction standards across Victoria.

Occupancy, Tenancy, and Usage

Small second homes in Victoria must comply with standard residential tenancy requirements regardless of who occupies them. The dwelling may be rented independently or used for family members, providing flexibility for developers and property owners seeking additional income or multi-generational living solutions.

Eligible Occupants and Rental Laws

No restrictions exist on who may occupy a small second home in Victoria. The dwelling may be rented to any tenant or occupied by family members, including aging parents, adult children, or unrelated parties.

Residential tenancy requirements apply to small second homes, covering room sizes, facilities, and smoke alarm provisions. Rental laws follow the same framework as primary dwellings.

Property developers considering small second homes for investment purposes should note that these dwellings cannot be subdivided or sold separately from the main property. The land must remain as a single title, though rental income from both dwellings may be collected independently.

Building permit conditions and planning scheme overlays may impose additional requirements depending on site location and zoning. Council-specific provisions could affect occupancy arrangements in certain areas.

Independent Living and Multi-Generational Households

Small second homes support independent living arrangements while maintaining proximity to family. Parents downsizing from larger properties may occupy the secondary dwelling whilst adult children use the main house, or elderly relatives may live independently with nearby support.

The maximum 60 square metre footprint accommodates one or two occupants comfortably. Developers should consider accessibility features and liveable housing design standards when targeting aging demographics.

Multi-generational living arrangements benefit from separate utilities and entries where feasible. The building permit process addresses services including water, electricity, and sewerage connections.

Properties with small second homes may appeal to buyers seeking flexible accommodation options for extended family or rental income potential.

Short-Stay Accommodation and Rental Opportunities

Small second homes may be used for short-stay accommodation subject to planning scheme provisions and local council requirements. Some areas restrict short-term rental use through overlays or specific clauses.

Developers should verify whether the planning scheme permits tourist accommodation or short-stay use in the relevant zone. Heritage overlays, neighbourhood character overlays, or other controls may limit rental flexibility.

Long-term rental typically generates more consistent returns without additional permit requirements. The rental market for one-bedroom dwellings remains strong across Melbourne, particularly near transport and employment centres.

Properties configured for dual rental income appeal to investors and owner-occupiers alike. Rental laws require compliance with minimum standards for both dwellings, including energy efficiency ratings and maintenance obligations.

Construction Options and Choosing a Builder

Property developers in Victoria have several construction pathways when adding a secondary dwelling to a site. The choice between portable, custom-built, or prefabricated options typically depends on project timelines, site conditions, and budget parameters.

Portable and Transportable Granny Flats

Portable granny flats offer a factory-built solution that can be delivered to site in one or more modules. These transportable dwellings are manufactured off-site under controlled conditions, then transported and installed on prepared foundations.

The main advantage is reduced on-site construction time. A transportable dwelling may be ready for connection within days of delivery, compared to weeks or months for traditional builds. This approach can minimise site disruption and labour costs.

However, access constraints matter significantly. Transport trucks require clear pathways and adequate turning circles. Sites with narrow driveways, overhead power lines, or tight street access may not accommodate delivery. Developers should verify site accessibility before committing to this construction method.

Despite being portable, these dwellings still require proper foundations, building permits, and compliance with the National Construction Code. They cannot be treated as temporary structures or caravans for regulatory purposes.

Custom vs. Prefabricated Builds

Custom granny flats are designed and built specifically for a site, allowing full control over layout, materials, and finishes. This approach suits projects with unique site constraints, specific tenant requirements, or where developers seek to maximise yield through optimised design.

Prefabricated options use standardised designs with limited customisation. These typically cost less and follow predictable timelines, making them suitable for straightforward residential sites.

Factor	Custom Build	Prefabricated
Design flexibility	High	Limited
Construction time	3-6 months	1-3 months
Cost predictability	Variable	High
Site suitability	Any compliant site	Standard conditions

Granny flats for sale as prefabricated packages often include standard layouts ranging from one to three bedrooms. Developers should verify whether quoted prices include site preparation, connections, and permit costs.

Custom builds allow integration with existing structures and landscaping. This may be important on premium sites where design quality affects the primary dwelling’s value. Prefabricated units work well for rental-focused developments where standardisation reduces complexity.

Working with Granny Flat Builders

Selecting an appropriate granny flat builder requires verification of relevant credentials and experience. Builders must hold current registration with the Building and Plumbing Commission, which replaced the Victorian Building Authority on 1 July 2025, and maintain appropriate insurance.

Developers should request documentation of previous projects, particularly those similar in scale and site conditions. Builders experienced with Victoria’s planning schemes and ResCode provisions can navigate compliance requirements more efficiently.

Contract terms should specify timelines, payment schedules, and responsibility for permit applications. Some builders offer turnkey services including design, permits, and construction. Others focus solely on construction, requiring developers to engage separate consultants for design and approvals.

Victorian building permits for small second homes under 60 square metres must demonstrate compliance with 7-star energy efficiency standards and National Construction Code requirements. Experienced builders understand these technical requirements and can detail how their construction methods achieve compliance.

Warranty periods, defects liability, and maintenance obligations should be clearly defined in construction contracts. Developers should verify whether builders provide post-construction support for building certification and final inspections.

Frequently Asked Questions

Most properties in residential and rural zones can now accommodate a small second dwelling of up to 60 square metres without a planning permit, though a building permit — overseen by the Building and Plumbing Commission (BPC) regime — remains mandatory in all cases.

What are the requirements for building a granny flat on my property in Victoria?

Following Amendment VC253 implemented in December 2023, small second homes up to 60 square metres typically do not require a planning permit in most residential and rural zones. A building permit through the BPC system remains mandatory in all circumstances.

The property must not be subject to flooding, environmental, or other special planning controls such as heritage overlays or bushfire management overlays. Properties within these overlay areas may still require a planning permit assessment.

The granny flat cannot be subdivided or separately sold from the main dwelling. It must remain as an accessory to the primary residence on the same title.

Building permits ensure compliance with siting, amenity, design, and safety requirements. These applications are processed under the framework administered by the Building and Plumbing Commission, which took over the Victorian Building Authority’s functions on 1 July 2025.

Can a granny flat be constructed as a separate dwelling on my property, or must it be attached to the existing structure?

A granny flat may be constructed as a detached structure separate from the main dwelling. The regulations do not mandate physical attachment to the existing home.

Detached configurations are common and often preferred for privacy and flexibility. The structure must still comply with setback requirements and meet ResCode standards for amenity impacts on neighbouring properties.

Attached or semi-attached designs remain valid options where site constraints or owner preferences favour this approach. The choice between detached and attached configurations does not affect planning permit exemption eligibility, provided all other requirements are met.

Are there any specific zoning regulations I need to be aware of when planning a granny flat in Victoria?

The planning permit exemption for small second homes applies primarily to residential zones (General Residential Zone, Neighbourhood Residential Zone, Residential Growth Zone) and rural zones. Mixed-use and commercial zones may have different requirements.

Properties located in areas with overlay controls require additional assessment. Heritage overlays, Design and Development Overlays, Environmental Significance Overlays, and Bushfire Management Overlays typically trigger planning permit requirements regardless of dwelling size.

The relevant planning scheme must be checked for any specific local provisions. Some councils may have additional controls through their municipal planning schemes that affect small second home development.

VCAT handles disputes related to planning permit applications or refusals where a permit is required. Properties within overlay areas should engage early consultation with the relevant council to clarify requirements.

What is the maximum floor area allowed for a granny flat in Victoria?

The maximum floor area for a small second home that qualifies for planning permit exemption is 60 square metres. This measurement represents the total floor area of the structure.

Floor area includes all roofed areas but typically excludes open verandahs, decks, and pergolas without solid roofing. Precise measurement definitions align with the building regulations framework administered through the BPC system.

Structures exceeding 60 square metres require a planning permit application through the standard process. These applications are assessed against ResCode standards under Clause 55 for residential zones, which includes provisions updated by Amendment VC282 in September 2025.

The 60 square metre threshold represents a balance between providing additional accommodation options and maintaining neighbourhood character. Developers considering larger secondary dwellings should factor in extended approval timeframes and potential VCAT review processes.

Can I rent out a granny flat in Victoria?

Yes. The small second dwelling definition carries no restriction on who occupies it — family or tenants. Normal residential tenancy law applies, including minimum standards. Short-stay use depends on the planning scheme and any local controls for your area, so check before planning around it.

Can I subdivide the granny flat onto its own title and sell it?

No. Since Amendment VC288 (16 October 2025), the residential zone rules direct that a subdivision permit must not be granted where it would create a separate lot for land containing a small second dwelling. The granny flat stays on the same title as the main home.

Does a granny flat need to be all-electric?

Effectively, yes: a condition of the no-permit pathway in the residential zones is that reticulated natural gas must not be supplied to the small second dwelling. Plan for electric cooking, heating and hot water.

How does the construction of a granny flat impact my property taxes in Victoria?

The addition of a granny flat typically increases the property’s capital improved value, which may result in higher council rates. The State Revenue Office assesses land tax based on the site value rather than improvements, though enhanced site utility may affect valuations.

Council rates are calculated based on the capital improved value, which includes all buildings and improvements on the land. A granny flat represents a significant improvement that council valuations will capture in subsequent rating assessments.

The ability to generate rental income from a granny flat may offset increased holding costs. Renting granny flats is permitted under Victorian regulations, provided the arrangement complies with residential tenancy laws.

Property developers should factor increased rates and potential land tax implications into feasibility assessments. Tax treatment of rental income follows standard Australian Taxation Office guidelines for residential property investment.

What processes must I follow to ensure my granny flat complies with Victoria’s building codes and standards?

All granny flats require a building permit processed through the BPC system, regardless of planning permit exemption status. A registered building surveyor must assess compliance with the Building Code of Australia and Victorian building regulations.

The building permit application must include detailed plans, specifications, and engineering certifications where required. The Building Amendment (Small Second Dwellings) Regulations 2023 coordinates approval processes specifically for small second homes up to 60 square metres.

Mandatory inspections occur at key construction stages including footings, frame, and final completion. The building surveyor issues an occupancy permit upon satisfactory completion of all works and inspections.

Compliance with energy efficiency requirements, plumbing regulations, and electrical safety standards is verified through the building permit process. The BPC system ensures these technical requirements are properly assessed before construction commences and verified during mandatory inspections.

Find Out What Your Block Allows

The rules above are statewide; whether they work on your block comes down to its zone, overlays, lot size and layout. The free property check reads those for your address in about two minutes, and the homeowner guide walks through what the results mean. If you would rather talk it through first, book a free 30-minute call with our Principal Architect.

---

This article provides general information about Victorian planning for property owners. It does not constitute professional advice. For guidance specific to your property, contact SQM Architects (ARBV Reg. No. 51498).