An expandable home can potentially be approved for permanent residential use in Victoria. Its folding or factory-built format is not the deciding factor. The installed home must suit a permitted land use, satisfy the relevant planning controls and obtain the required building permit.
For some projects, Victoria's small second home provisions provide a useful pathway. Planning Victoria updated the planning definition on 15 October 2026, while noting that corresponding building-system changes are to follow. Check both systems before selecting a model; planning relief is not building approval.
Classify the proposal before choosing the pathway
Describe what the finished project will be, not only how it travels to site:
| Project question | Why it matters |
|---|---|
| Is it the main home or a second home? | The small second dwelling provisions require an existing home on the same lot. |
| What is the measured floor area after expansion? | Apply the current planning measurement rules, then confirm the separate building requirements. |
| Does it include a kitchen, bathroom and toilet? | These facilities form part of the small second home definition. |
| Will it be rented or occupied by family? | Planning Victoria permits either for a qualifying small second home, subject to applicable residential requirements. |
| Can it provide building-permit evidence? | The installed building must satisfy siting, structural, energy, fire-safety and other requirements. |
Transport dimensions and catalogue area do not establish the measured floor area for approval. Use current dimensioned drawings and confirm the applicable measurement rules.
Understand the small second home pathway
Planning Victoria's current guidance explains the updated planning definition and exceptions. Start by checking:
- 01the current floor-area limit and measurement method
- 02the existing dwelling and proposed residential facilities
- 03the number of dwellings and title restrictions
- 04service arrangements and the applicable building requirements
Anyone can live in or rent out a qualifying small second home. This is different from the older dependent-person's-unit concept and should not be described as a blanket granny-flat exemption.
Check planning permit triggers property by property
Many small second homes do not require a planning permit, but the exemption is conditional. Use the current planning guidance above rather than the older applicant PDF, which still describes the previous definition. Confirm the applicable zone, overlays and planning scheme for the land.
Key questions include:
- 01Is the lot in a residential, rural, green-wedge or another zone?
- 02Is the residential lot smaller than 300 m2?
- 03Do bushfire, flood, heritage, environmental or design overlays apply?
- 04Does the proposal meet setback, height, garden-area and amenity requirements?
- 05Are earthworks, vegetation removal or other works separately controlled?
The Single Home Code explains the current Clause 54 and VicSmart context for relevant residential development. Generate a planning property report and ask the local council to confirm the current scheme provisions for the address.
Establish the building-permit pathway
Planning-permit exemption is not a no-approval pathway. A municipal or private building surveyor must assess the building-permit application for the installed dwelling.
The Victoria state guide explains the revised planning limit and the building-system transition. Confirm which building provisions apply to your actual proposal before manufacture.
Prepare to coordinate:
| Building-permit topic | Project evidence likely to be needed |
|---|---|
| Classification and approved use | Plans, room functions and project description |
| Structure and installation | Product engineering, site wind conditions, supports, footings and connections |
| Siting and amenity | Survey, setbacks, overlooking, daylight and private open-space response |
| Energy and weatherproofing | Project-specific thermal, glazing, insulation and envelope evidence |
| Fire and bushfire | Applicable construction and site response |
| Plumbing and drainage | Water, wastewater, stormwater and legal point of discharge information |
An overseas factory certificate, brochure or generic engineering set may inform the application but does not replace evidence accepted for the Victorian site and installed configuration.
Compare The Span 30 and The Horizon 40 against the rule
The Span 30 has a published expanded area of approximately 56.52 m2, while The Horizon 40 has a published expanded area of approximately 74.10 m2. These catalogue figures are not verified approval-area calculations. Neither model's name or listed footprint confirms eligibility under the updated planning definition or the separate building requirements.
The property, existing dwelling, facilities, scheme controls, siting and complete approval evidence still determine the pathway. Use the direct model comparison to assess capacity and transport format, then have the planning and building pathway checked independently.
Use a two-part approval gate
- Step 01Ask council or a planning professional whether the use and development require a planning permit.
- Step 02Ask the appointed building surveyor what is required for the building permit and final occupancy pathway.
- Step 03Reconcile both responses with the supplier's current drawings and certification evidence.
- Step 04Confirm drainage, wastewater, access, foundations and delivery feasibility.
- Step 05Replace product-level allowances with written project scopes before contracting.
Do not schedule manufacture or transport merely because the proposal appears planning-permit exempt. The building permit, product evidence and site work can still require material design changes.
Frequently asked questions
Does an expandable home need a planning permit in Victoria?
It depends on the proposed use, zone, overlays, lot size and whether the home satisfies the small second dwelling provisions. Many qualifying small second homes avoid a planning permit, but other proposals may require one.
Does a small second home need a building permit?
Plan for a building permit and confirm the applicable requirements with the building surveyor. The October 2026 planning changes do not by themselves establish building approval or settle transitional building requirements.
Can anyone occupy a Victorian small second home?
Planning Victoria states that anyone may live in or rent out a qualifying small second home. The proposal must still meet the definition, approval conditions and applicable residential requirements.
Does factory construction prove building compliance?
No. Current drawings, structural and energy evidence, installation details, siting and other project documentation must support the building permit for the installed home on the specific property.
Prepare the next conversation
Share the property, intended use, existing home, candidate model and available site information through the Planning Assessment. ModuHaus can help structure the review, while council, the building surveyor and relevant practitioners must confirm the project-specific requirements.
Sources and further reading
Requirements change and can be applied differently by site and local authority. Check the current official sources and confirm your project with the relevant council, certifier or qualified professional.