Do You Need Council Approval for a Tiny House in Australia?

The short version: almost certainly yes, but the pathway varies

If you plan to live in a tiny house full-time on a residential block, you will almost certainly need some form of approval. The type of approval, who grants it, and how painful the process is depends on three things: your state's planning legislation, your local council's rules, and how the dwelling is classified.

This post covers the general landscape. It is not legal advice, and you should always confirm specifics with your local council before spending money.

How approval types work in Australia

Most states have a tiered system for building approvals. The terminology differs between states, but the general idea is the same:

Development Application (DA): The full planning approval process. You submit plans to council, they assess against zoning, setbacks, privacy, and other controls. This is the most common path for a new dwelling on a residential lot. Processing times vary from weeks to months depending on the council and complexity.

Complying Development Certificate (CDC): Available in NSW and some other states under different names. If your build meets a defined set of criteria (lot size, setbacks, floor area limits), you can get approval through a private certifier without going through full council assessment. Faster and more predictable, but your build has to tick every box.

Exempt development: Small structures under a certain size that don't need approval at all. Garden sheds, small decks, that sort of thing. Tiny houses rarely qualify as exempt development if they're intended for habitation, but some states allow small non-habitable structures (like a backyard office or studio) without approval up to around 10 to 20 square metres.

THOWs sit in a grey area

A tiny house on wheels is technically a vehicle, not a building. That distinction matters because planning law in most Australian states regulates buildings and land use, not vehicles. Some councils interpret this as meaning a THOW doesn't need building approval. Others take the view that if someone is living in it, it constitutes a dwelling and triggers planning controls regardless of whether it has wheels.

In practice, most councils won't bother you about a THOW parked on a rural property for occasional use. But if you're connected to services, living there full-time, and visible from the road in a suburban area, you're more likely to attract attention.

The safest approach is to contact your council's planning department before you buy. Ask specifically about "a transportable dwelling on a trailer chassis used as a primary residence." The answer will tell you a lot about where you stand.

State-by-state differences (broad strokes)

Planning law is state-level in Australia, and councils add their own local controls on top. Here's a rough guide to the landscape:

NSW: Has the most structured CDC pathway through the State Environmental Planning Policy (Exempt and Complying Development Codes). Secondary dwellings (granny flats) up to 60 square metres have a relatively clear complying development path on lots over 450 square metres. THOWs are less clear.

Victoria: Planning permits are the main pathway. Secondary dwellings (dependent person's units) have specific provisions but are more restrictive than NSW. Some councils are more progressive than others.

Queensland: Building approvals run through private certifiers in most cases. Secondary dwellings are called "auxiliary units" and are handled at the local council level. Rural properties in some shires have more flexibility.

South Australia: Uses a single online planning portal (PlanSA) for development applications. Class 1a dwellings need approval. Ancillary accommodation has specific provisions.

Western Australia: Planning approval through local councils, with secondary dwellings (ancillary dwellings) capped at 70 square metres in some areas. WA has been relatively progressive with granny flat provisions.

Tasmania: Smaller councils, often more case-by-case. Some rural areas are more relaxed about transportable dwellings, but you still need to check.

These are broad generalisations. Your specific council area and zoning will determine the actual rules.

What to ask your council

When you call or email your council's planning department, be specific. Vague questions get vague answers. Try something like:

"I want to place a [type: transportable cabin / THOW / modular home] on my property at [address]. What approvals are required?"
"Is the property zoned for a secondary dwelling? What are the size and setback requirements?"
"Can I use a transportable dwelling as a primary residence on this lot?"
"What are the service connection requirements (sewer/septic, water, electricity)?"

Get the answers in writing. An email from a planning officer carries more weight than a phone conversation if there's a dispute later.

Talk to builders too

Good builders know the approvals landscape in the states they operate in. They've been through the process dozens of times and can tell you which councils are straightforward and which ones require more patience. Some builders handle the approvals process as part of their service. Others expect you to manage it yourself.

Ask any builder you're considering: "Have you successfully placed a home in my council area before? What was the approvals process?"

FAQ

Does "on wheels" mean no approval needed?

Not automatically. Wheels don't exempt you from planning controls if you're using the structure as a dwelling. Placement duration, occupancy type, and service connections are usually what councils look at.

Should I ask the builder or the council first?

Both, ideally at the same time. The council sets the rules. The builder can tell you what has actually worked in practice and what hasn't. Sometimes those two things don't perfectly align.

What if my council says no?

You have options. You might be able to modify your plans to comply (smaller footprint, different setbacks). You can apply for a variation or a full DA. In some cases, switching from a THOW to a fixed transportable cabin changes the classification enough to open a pathway. A town planner can help if you're stuck.