Owner Builder Permits in Australia, by State

Every Australian state and territory except South Australia requires an approval before you can owner build, and no two call it the same thing or set the same threshold. The value that triggers it ranges from $10,000 in New South Wales to $25,000 in the Northern Territory — and in Tasmania it is not a dollar figure at all.

This is a guide, not legal advice, and these figures change. Thresholds, fees and course requirements are amended regularly — several changed during 2026 alone. Confirm the current position with your own state regulator before you rely on any of it. Every claim below is linked to the source it came from at the foot of this page.

What each state and territory requires

	What it's called	Threshold	Course	How often
NSW	Owner-builder permit	Over $10,000	Required at $20,000+	Within 5 years needs special circumstances
VIC	Certificate of consent	Over $20,000	eLearning assessment	Once every 5 years
QLD	Owner-builder permit	Over $11,000 incl GST	Yes, max 5 years old	One every 6 years
WA	Owner-builder approval	Over $20,000 ($50,000 class 10a)	Within previous 24 months	One every 6 years
SA	No owner-builder approval found	—	No	No wait, but see the two-in-five rule
TAS	Owner builder permit	No dollar threshold — by building class	Within 12 months, Class 1a only	Two Class 1a projects per 10 years
ACT	Owner-builder licence	—	Within last 5 years	Licence lasts up to 3 years
NT	Owner builder certificate	Over $25,000	None — read the manual	6-year wait, 3-year certificate

Why South Australia is different

South Australia stands alone. No owner-builder permit, licence, consent or certificate appears anywhere in the state government's own material. It goes straight from what owner building means to what you are responsible for, with no application step in between.

That is not the same as no rules. South Australia controls owner building three other ways:

1. A written contract is required for any building work you contract out costing $20,000 or more.
2. Building indemnity insurance must be taken out by the licensed tradesperson you engage, where council approval is required. The state is explicit that owner builders cannot take out building indemnity insurance themselves.
3. The two-in-five rule. Anyone who sells or rents two or more buildings within five years that they built or improved is treated as a building work contractor unless they can prove otherwise, and must be licensed. That is South Australia's frequency restriction — it works by deeming you a builder rather than by refusing you a permit.

You still need development approval and building consent under the planning system. Those apply to everyone and are not owner-builder approvals.

Why Tasmania has no threshold

Tasmania is the other outlier. Its rules are written in building class and floor area, not dollars. Whether you need a permit depends on what you are building, not what it costs.

You can build without an owner builder permit:

• a shed, garage or carport up to 18m², or 36m² if prefabricated
• a porch or veranda up to 9m², or a deck up to 1m high
• a temporary swimming pool up to 9m², with an approved safety barrier
• maintenance or repairs using similar materials to those replaced

Class 7b farm sheds need no permit either, though a shed over 200m² needs a building surveyor and a Certificate of Likely Compliance.

The order of steps is also unlike anywhere else. You engage a building surveyor first, apply for the owner builder permit in consultation with them, receive approval from the Administrator of Occupational Licensing, get a Certificate of Likely Compliance, and only then apply to council for a building permit.

What it costs

Fees are the least consistent part of the picture and the hardest to pin down — several jurisdictions publish them only on a separate schedule that changes each July. Two are confirmed:

	Fee
TAS	$470.40 per project, Class 1a. $235.20 for Class 10a and 10b. Charged per project, not per year
NT	$342, payable at lodgement and non-refundable

Tasmania is worth a second look there. The permit is charged per project, and the regulator states plainly that the fee and insurance requirements for an owner builder are the same as for a licensed builder. Tasmania also requires $5 million in public liability cover.

What you are taking on

The approval is the easy part. What you are agreeing to is larger, and the regulators say so directly.

In the Northern Territory you take on work health and safety of workers, compliance with building certification including permits and inspections, directing and assessing others' workmanship, site protection, insurance and registrations for tradesmen, and rectifying defective work for up to six years if you sell the property. Engaging a project manager does not remove any of it.

In Tasmania you sign a declaration accepting that you "may be liable to subsequent owners for defective building work up to ten years after completion or an occupancy permit has been issued".

And the trade-off is stated most bluntly by the NT: "It may be cheaper to register yourself instead of contracting work out, but you will have no protection against defective work. You can only take subcontractors to court."

If your builder suggests you become the owner builder

Treat it as a warning sign. Two regulators warn about this independently, in almost the same words.

The Northern Territory: "A builder who recommends you become an owner builder while they act as project manager, may be avoiding legal responsibilities or be unregistered."

South Australia: "If you are looking to build through a builder and they ask that you put yourself down as an owner-builder for the project, you should contact CBS for advice. These arrangements are often illegal and expose the customer to large risks."

The effect is the same in both cases. Naming you as the owner builder moves the legal responsibility and the insurance obligation from a licensed business onto an individual — one who, in South Australia at least, cannot take out building indemnity insurance at all.

Things that are true almost everywhere

A company or trust cannot be an owner builder. Tasmania and the Northern Territory state it outright, and the shape of the rules elsewhere follows the same logic: owner building is a person building their own home, not a business building stock.

Everyone on the title must apply. Not just the person doing the work.

The approval is not a building permit. In every jurisdiction it is a separate, earlier step. You still need building approval afterwards, and in the NT you also need a fidelity fund certificate before that permit is issued.

You do not need trade qualifications to be an owner builder — but you cannot do plumbing, gas fitting or electrical work yourself. Those are licensed trades everywhere in Australia.

Before you apply

Work out which threshold you are actually over. The value assessed is not what the job costs you — Tasmania is explicit that it is the market value "as if the project were to be constructed by a licensed builder", including labour, materials and GST. Doing the work yourself does not lower the number that decides whether you need a permit.

Then check the waiting period against your own history. If you have owner built before, the clock in most states runs from the issue of the previous permit, not from when the build finished.

SiteForeman stores your permit number against your project and puts your state's inspection checkpoints into your build timeline, so the hold points sit in the program rather than in your memory.

Related reading

• Mandatory building inspections by state — the hold points, and which are statutory where
• The stages of an Australian house build — what happens in what order
• What it costs to owner build in Australia — cost per square metre and where the spend falls
• Free owner builder cost calculator — an indicative range for your city and specification