Alternative Housing Australia
Tiny House Rules and Regulations in ACT
Updated October 2026 | AHA Research Team
In the ACT, whether you can live in a tiny home on wheels mostly comes down to your Crown lease (the lease your block is held under). If your lease authorises that use and no works that need approval go with it, you don’t need development approval. If it doesn’t, you’ll need to check with the Territory Planning Authority.
A fixed backyard tiny home is a secondary residence under the Territory Plan. Adding one needs development approval, and it can be up to 90 m².
The ACT doesn’t have local councils. The ACT Government runs planning and building, and planning decisions are made by the Territory Planning Authority.
Quick Answers
Can I live in a tiny home on wheels on a vacant block?
Check first. Living in it doesn’t need development approval only if your Crown lease authorises that use and no works that need approval go with it. Living in it long term can also stop it being excluded from the Building Act, so ask the Territory Planning Authority before you move in.
Can someone live in a tiny home on wheels in my backyard?
Check first. The same lease test applies in a backyard as on a vacant block. We found no official source on whether a standard residential lease allows someone to live in a caravan, so read your lease and ask the Territory Planning Authority.
How long can guests stay in a tiny home on wheels without approval?
Check first. We found no ACT law that sets a number of days for guest stays. The Building Act only leaves a caravan out of the meaning of “building” while it isn’t used for long-term habitation, and neither the Act nor the Territory Plan defines how long that is.
Can I connect a tiny home on wheels to water and sewer?
Check first. We found no ACT rule written specifically for connecting a tiny home on wheels. Plumbers and drainers must notify Access Canberra before starting work, and plans that increase sewer load or change a connection point to the sewer or water main go to Icon Water for approval first.
Can I build a fixed backyard tiny home without a full planning application?
No. Adding a secondary residence is not exempt development in the ACT, so it needs development approval from the Territory Planning Authority as well as building approval. We found no other pathway.
Do I need a building permit for a tiny home?
Yes for a fixed tiny home, unless the building work is exempt. In the ACT it’s called building approval, and it comes from a certifier you appoint. A tiny home on wheels is excluded from the Building Act while it isn’t used for long-term habitation and stays readily transportable.
Tiny house on wheels (THOW)
Wheels alone don’t decide how ACT law treats a tiny home. Under the Building Act 2004, what matters is whether it’s used for long-term living and whether it can easily be moved. The Building Act also says it doesn’t affect other ACT laws about land use, so planning law still applies, and so does your Crown lease. The sections below explain when you need approval.
How ACT land leases affect your tiny home
The ACT works differently from the states in two ways, and both matter for tiny homes.
There are no councils. The ACT Government looks after local matters instead. If you need development approval, the Territory Planning Authority decides your application.
Your block is leased. In the ACT, land is held under a Crown lease. Under the Planning Act 2023, you can only use your block for purposes allowed by your lease or the Act.
What this means for your tiny home on wheels. Having a tiny home on wheels on your block and using it counts as using your land. If your lease allows that use, you don’t need development approval, unless you also do earthworks or building work that needs its own approval. If your lease doesn’t allow it, we found no other exemption, so check with the Territory Planning Authority before you bring one onto your block. Using your land without an approval you need is an offence.
When you don’t need government approval
No building approval while it stays mobile. Under the Building Act 2004, your tiny home on wheels isn’t counted as a building while two things are true: no one is living in it long term, and it can be moved without taking it apart or removing it from things like footings, an annexe or another building attached to it. While both are true, you don’t need building approval for it. That covers parking an empty tiny home on your block, or using it for stays that aren’t long-term living.
Guest stays. We found no ACT law that gives guests a set number of days in a tiny home on wheels. Whether a guest stay needs development approval comes back to your lease, as explained above.
Told you don’t need approval? Check with the Territory Planning Authority first.
If a seller or builder tells you a tiny home doesn’t need council approval, check before you buy. Whether you need approval depends on your block and your Crown lease. Before signing a sales contract, ask the Territory Planning Authority whether your plans are likely to be exempt, and get the answer in writing if you can.
When you need government approval
If your lease doesn’t allow it. Living in a tiny home on wheels is a use of your land. If your Crown lease doesn’t authorise that use, the exemption for lease-authorised uses doesn’t apply, and we found no other exemption that covers it. Under the Planning Act 2023, leased land must not be used for a purpose that isn’t authorised by the lease or the Act. This applies on a vacant block as well as in a backyard.
If you need works to set it up. Even when your lease allows the use, that exemption doesn’t apply if the use comes with earthworks, construction or building work that needs approval. Check with the Territory Planning Authority before doing any works for the home.
If it no longer counts as a caravan. The Building Act 2004 only leaves a caravan or mobile home out of the meaning of “building” while it isn’t used for long-term habitation and can be readily moved without being taken apart or removed from things like footings, stumps, a rigid annexe or an attached building. If either of those stops being true, the Act no longer leaves it out. Building work needs building approval from a certifier unless it’s exempt. We found no official guidance on how this applies to a tiny home on wheels, so ask a certifier before anyone moves in for the long term or before you fix the home in place.
A building approval on its own doesn’t let you use your land in a way your lease doesn’t allow, or skip a development approval you need.
Towing and registration
To tow a tiny home on wheels on ACT roads, it needs to be registered with Access Canberra, like any other trailer or caravan. Our buying guide covers size limits, brakes, driver licences and registration in detail.
Wider than 2.5 metres? A light vehicle in the ACT must not be over 2.5 metres wide. If a light trailer breaks this rule, both the driver towing it and the trailer’s operator commit an offence. The road transport authority can exempt a light vehicle from the width rule, and if the exemption has conditions, all of them must be met. It may also register a vehicle that doesn’t meet a vehicle standard with conditions (conditional registration). If your home will be wider than 2.5 metres, talk to Access Canberra before you buy.
Tiny house on foundations
A tiny home fixed in place, for example on footings, piers or stumps, counts as a building under the Building Act 2004. Building work needs building approval from a certifier unless it’s exempt, and you may also need development approval from the Territory Planning Authority.
Backyard tiny homes (secondary residences)
In the ACT, a fixed backyard tiny home is a secondary residence under the Territory Plan. Adding a secondary residence is not exempt development, so it needs development approval from the Territory Planning Authority as well as building approval.
Where you can build one. Secondary residences are allowed in all residential zones (RZ1 to RZ5). The Territory Plan says a secondary residence can only be built together with single dwelling housing, and you can have only one per block.
How big it can be. The maximum size is 90 m², measured to the outside face of the external walls and not counting a garage, and it can be up to 2 storeys. We found no minimum size in the Territory Plan. The secondary residence also counts toward the block’s site coverage limit (how much of the block buildings can cover).
What the assessment looks at. The Territory Planning Authority assesses your proposal against outcomes set in the Territory Plan. These include reasonable solar access and privacy for your home and your neighbours, enough planting area and canopy trees, and site features and risks such as heritage, bushfire and flooding.
Check your Crown lease. A certifier must not issue building approval if the work would breach an ACT law because of things like the number of buildings on the land, and using leased land for a purpose the lease doesn’t allow breaches the Planning Act.
Skipping the planning application
We found no way to add a fixed backyard tiny home in the ACT without development approval. The ACT’s single dwelling housing development control lets a single dwelling that meets all its requirements be built without development approval. However, it says adding a secondary residence is not exempt development and requires development approval.
Building approval pathways
Appoint a certifier. As the landowner, you must appoint a certifier for building work that isn’t exempt. A certifier is a licensed construction practitioner who is entitled to work as a certifier. They must not have an interest in the work, so they can’t, for example, be the person who prepares the drawings or does the building work.
Apply for building approval. You apply to your certifier with your plans. If there’s a development approval for the work, a copy must go with your application. The certifier must approve the plans if they meet the approval requirements. These include that the building will comply with the Building Act, which includes the building code, and will be structurally sufficient, safe and stable.
Development approval still applies. A building approval doesn’t let you carry out development that needs development approval unless you have that approval. It also doesn’t let you use your land in a way your lease doesn’t allow.
How long it lasts. A building approval lasts up to 3 years from the day it’s issued. It ends sooner if your lease or another ACT law sets an earlier deadline for finishing the work.
Inspections during the build. Your certifier inspects the work at set stages to check it complies with the Building Act.
Not sure if your work is exempt? You can apply to a building surveyor for an exemption assessment, which says whether the work is exempt from all or part of the Building Act. You don’t have to get one.
Building standards
Which building code applies. A fixed tiny home must comply with the Building Act, which includes the building code. In the ACT, that’s the National Construction Code (NCC) with ACT variations. NCC 2025 started in the ACT on 1 May 2026, with a transition period. If your building approval is issued after 1 May 2026 and before 1 May 2027, you can comply with either NCC 2022 and the ACT 2022 Appendix, or NCC 2025 and the ACT 2025 Appendix. You must clearly nominate which one, and you can’t mix the two. After 1 May 2027, NCC 2025 applies. The exception is a development application formally lodged before 1 November 2026: you can keep seeking building approval under either edition until that development application expires.
Energy efficiency. Energy efficiency is part of the NCC. Where an energy efficiency provision requires it, your building approval application must include an energy efficiency certificate. Our buying guide covers the NCC’s energy efficiency rules.
No new gas connections. In residential zones, the Territory Plan says no new gas network connections are allowed for new or existing developments.
Bushfire. Some blocks must be built to a set bushfire attack level (BAL) under the bushfire construction standard AS 3959-2018. According to Access Canberra, if your building work needs development approval and your block is identified in the relevant district technical specification, you must build to that BAL or meet the outcomes of the technical specification. Your application may be referred to the ACT Emergency Services Agency, and your approval may require a specific BAL or a site-specific bushfire assessment. If your block isn’t identified, Access Canberra says there’s no requirement to comply with AS 3959-2018.
A tiny home as your main house
A fixed tiny home can be the only home on your block. A single dwelling can be built without development approval if it meets all the relevant requirements of the ACT’s single dwelling housing development control and the exemption criteria in the Planning (Exempt Development) Regulation 2023. If it doesn’t, you need development approval. The building approval rules above still apply.
We found no minimum house size in the Territory Plan’s residential zones policy or in the single dwelling housing development control. Our buying guide covers what the National Construction Code requires inside a home.
Check your Crown lease. Your lease sets what the land can be used for, and a lease condition can set a deadline for finishing building work. Read your lease before you buy or build.
FAQs
Can I rent out my tiny home to a long-term tenant?
Tiny home on wheels: Check first. Renting it out doesn’t change the lease test. Someone living in it needs to be a use your Crown lease authorises, or you need approval. Living in it long term can also stop it being excluded from the Building Act.
Fixed backyard tiny home: We found no rule in the Territory Plan’s residential zones policy that limits who can live in an approved secondary residence. ACT Revenue’s land tax rules cover rented secondary dwellings such as granny flats (see the rates and land tax question). Check your Crown lease as well.
Can I use my tiny home as a short-term holiday rental (Airbnb)?
Check first. We found no ACT rule written specifically for short-term holiday rentals. “Commercial accommodation” isn’t on the Territory Plan’s list of permitted uses in residential zones, and uses not on the list are prohibited. However, we found no official guidance on whether a holiday rental counts as commercial accommodation. This applies to both tiny homes on wheels and fixed tiny homes, so check your lease and ask the Territory Planning Authority before listing.
Will adding a tiny home increase my council rates and land tax?
Rates: The ACT has no councils. General rates are charged by the ACT Revenue Office and are made up of a fixed charge and a valuation charge based on the land’s average unimproved value (the value of the land without buildings). We found no ACT Revenue guidance on whether adding a tiny home changes your rates.
Fixed backyard tiny home: If the main house is your principal place of residence, ACT Revenue says you pay land tax on a secondary dwelling such as a granny flat only while it’s rented. The amount is a proportion based on the rented floor area, and you must tell ACT Revenue you’re renting it out. If the property isn’t your principal place of residence, land tax applies whether the dwellings are rented or vacant.
Tiny home on wheels: We found no ACT Revenue guidance on whether a rented tiny home on wheels counts as a secondary dwelling for land tax. Ask ACT Revenue before you rent it out.
Can I go off-grid, use a composting toilet, or connect to services?
We found no ACT rules written specifically for tiny homes going off-grid, so the general rules apply to both types.
Connecting to services: Plumbers and drainers must notify Access Canberra before starting work. Plans that increase sewer load or change a connection point to the sewer or water main go to Icon Water for approval first. In residential zones, the Territory Plan says no new gas network connections are allowed.
Toilets and wastewater: To install or alter an on-site system for toilet waste, such as a septic tank, chemical toilet or sewage treatment plant, you need approval under the Public Health Regulation 2000 first. On-site sewage systems aren’t permitted where you have access to the sewerage network. We found no ACT page written specifically for composting toilets, so check with ACT Health before installing one.
Common myth:
Going off-grid doesn’t remove the rules. Your Crown lease still controls how your land can be used, and you need approval under the Public Health Regulation 2000 before installing or altering an on-site system for toilet waste.
Can I subdivide my land or sell the tiny home separately later?
Tiny home on wheels: If it’s registered, selling it means transferring the registration. The seller fills in and signs the transfer form and gives it to the buyer, who must lodge it with the road transport authority within 14 days.
Fixed backyard tiny home: No. The Territory Plan doesn’t allow subdivision to give a secondary residence its own separate title in any zone, including unit titling under the Unit Titles Act 2001. It stays on the same title as the main house.
What regulatory changes are coming next in ACT?
The Missing Middle housing reforms to the Territory Plan started on 1 July 2026. They allow more housing types, such as duplexes, townhouses and low-rise apartments, in RZ1 and RZ2 zones. From 1 May 2027, NCC 2025 becomes mandatory for new building approvals, except for development applications lodged before 1 November 2026. The ACT Government also plans a Canberra House Pattern Book of pre-approved designs for missing middle housing, funded over two years from 2026–27. We found no announced changes aimed specifically at tiny homes.
Comparing states? See how every state’s rules stack up in our state-by-state comparison.