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Owner-builder permits in Australia by state
| NSW | > A$10,000; course required if ≥ A$20,000[1] |
|---|---|
| VIC | > A$20,000[2] |
| QLD | > A$11,000; course required if > A$20,000[3] |
| WA | > A$20,000 — highest threshold nationally[4] |
| SA | No separate permit system; written statement + BII rules apply[5] |
| TAS | Declared at building permit stage; owner-builder licence via CBOS[6] |
| ACT | Licensed — owner-builder licence required regardless of value[7] |
| NT | Owner-builder certificate under the Building Act 1993; duplex/townhouse work over A$25,000 excluded[8] |
| *Thresholds and rules change — confirm current figures with the regulator before committing to a project. | |
Whether you need an owner-builder permit depends on the value of the work and the state: work worth more than A$10,000 in New South Wales, more than A$11,000 in Queensland, and more than A$20,000 in Victoria and Western Australia.[1][2][3][4] The ACT requires an owner-builder licence regardless of value, while South Australia has no separate permit system.[5][7] In Victoria, transporting a prefabricated home to the land does not by itself require a certificate of consent, because it is not domestic building work under Victorian law.[9]
An owner-builder permit lets you take legal responsibility for managing your own residential building project instead of engaging a registered builder. It is not a shortcut around the rules — it transfers the rules' obligations from a builder's licence onto you personally, and every state attaches its own value threshold, training requirement and resale disclosure rule to that transfer.
This matters directly for kit home buyers: a kit home is often chosen precisely because the owner wants to manage or do the work themselves, which is exactly the scenario these permits govern. See what is a kit home.
What every state has in common §
Regardless of jurisdiction, an owner-builder permit or licence:
- Authorises you to manage the build — it does not authorise you to personally perform licensed electrical, plumbing or gas work. That always requires a licensed tradesperson.
- Generally requires you to intend to live in the completed home, not sell or rent it as a commercial venture.
- Is usually restricted to one project within a set number of years, to stop the permit being used as an unlicensed contracting business.
- Carries resale obligations — usually a defects report, warranty, or insurance requirement if you sell within a set number of years of completion.
State and territory comparison §
| Jurisdiction | Regulator | Threshold | Course required |
|---|---|---|---|
| NSW | NSW Fair Trading / Building Commission NSW | > $10,000 | If ≥ $20,000[1] |
| VIC | Building and Plumbing Commission (formerly VBA) | > $20,000 | Yes — eLearning assessment[10] |
| QLD | QBCC | > $11,000 | Course generally required[3] |
| WA | Building and Energy (DEMIRS) | > $20,000 | Approved course required |
| SA | Consumer and Business Services / SAFA | No separate threshold | No mandatory course[5] |
| TAS | Consumer, Building and Occupational Services | Declared at permit stage | Owner-builder licence via CBOS[6] |
| ACT | Access Canberra | Licensed regardless of value | Owner-builder course certificate[7] |
| NT | Building Practitioners Board | Certificate-based; $25,000 cap on duplex/townhouse work | Declaration-based[8] |
New South Wales §
An owner-builder permit is required to supervise or do building work worth more than $10,000 on a single dwelling-house, dual occupancy or secondary dwelling that requires development consent or is complying development.[1]
To be eligible you must be 18 or over, hold a current general construction induction (white) card, be the owner or joint owner of the land — or a shareholder in a company that owns it, or hold a registered lease of at least three years — intend to live in the property once complete, and hold an approved Development Application or Complying Development Certificate.[1]
The training requirement only bites above a second, higher figure: the owner-builder approved education requirement (or an equivalent accreditation) is only mandatory if the cost of the building work is $20,000 or more.[1] Below that, the $10,000 permit threshold still applies, but the course is not required.
You cannot obtain a second permit within five years without showing special circumstances, and dual occupancy construction also requires special-circumstances evidence.[1]
Victoria §
The Victorian threshold is materially higher than NSW's: a certificate of consent is required if the value of the domestic building work is over $20,000, calculated as the cost of engaging a registered builder — not your actual out-of-pocket spend.[2] Eligibility includes successfully completing the owner-builder eLearning assessment and construction induction training for the project.[10]
For a modular or prefabricated home specifically, transporting the finished home to the block does not itself require a certificate of consent — the BPC treats transportation as excluded from "domestic building work" under section 6(g) of the Domestic Building Contracts Act 1995. A certificate is only needed if the on-site work after delivery — installation, site preparation, landscaping or other structural work — exceeds $20,000 on its own, calculated separately from the cost of the home itself and its transport.[9]
An owner-builder in Victoria can only build or renovate one house every five years, and must intend to live in it on completion; different provisions apply to small second dwellings.[2]
Victoria's resale rules now run through Home Warranty: an owner-builder who sells within 6 years of completing the work must apply for a Notice of Cover and pay the premium to cover the work under Home Warranty, and remains responsible to a subsequent owner for fixing defects or non-compliances for 10 years from completion.[2] See Home Warranty replaces domestic building insurance in Victoria.
Queensland §
Queensland has the lowest headline threshold of the larger states: a permit is required for any project costing more than $11,000.[3] An owner-builder permit also exempts the holder from the QLeave portable long-service-leave levy on work done under the permit.[3] Current QBCC licensees are automatically exempt from the mandatory owner-builder course.[3]
Western Australia §
WA runs the highest threshold in the country: owner-builder approval (via Building and Energy, part of DEMIRS) is required above $20,000.[4] An owner-builder in WA can manage the construction of a detached dwelling including a granny flat, alterations to an existing free-standing dwelling, a non-habitable Class 10 building, or a small commercial building under 500 m².[4] Some low-risk, low-value Class 10a buildings, farm buildings and incidental structures such as swimming pools and retaining walls fall outside the occupational licensing requirement altogether.[4]
South Australia §
SA does not run a separate owner-builder permit system with its own value threshold in the way the other mainland states do. Owner-builders do not need formal trade qualifications to build their own home, unless the work is specialist trade work — plumbing, gas fitting or electrical — which always needs a licensed contractor regardless of who manages the project.[5]
The mechanism that does the regulatory work in SA is Building Indemnity Insurance (BII), and it can only be held by someone with a builder's licence — an owner-builder cannot take out BII.[5] The trigger that converts an owner-builder into a licensed building work contractor is volume, not project value: anyone who sells or rents two or more buildings they have built or improved within five years is treated as a building work contractor unless they can prove otherwise, and must then be licensed and hold BII.[5] Contracting out any single piece of work costing $20,000 or more requires a written contract with the tradesperson.[5]
Tasmania §
Tasmania does not operate a standalone owner-builder permit application separate from the building permit itself. All building work must comply with the Building Act 2016 and the National Construction Code, and must ordinarily be designed by a licensed designer, approved by a licensed building surveyor and constructed by a licensed builder — or the owner may instead apply for an owner-builder licence through Consumer, Building and Occupational Services (CBOS).[6] This is the same regulator and licence referenced in this site's Tasmanian tiny home guide for the vehicle-versus-building distinction.
Australian Capital Territory §
The ACT is the strictest jurisdiction on this list in one specific sense: owner-builders must be licensed, under the Construction Occupations (Licensing) Act 2004, regardless of the value of the work.[7] There is no value threshold below which an owner can manage building work unlicensed the way there is in NSW or Victoria.
An ACT owner-builder licence authorises work on a specific building approval relating to a Class 1, Class 2 or Class 10a building, takes on the same supervisory responsibilities as a licensed builder, and does not extend to specialist building work.[7] The applicant must be the lessee for the block — with co-lessee approval where the land is co-leased — and must meet the qualification requirements set out in the Construction Occupations (Licensing) (Qualifications) Declaration 2024.[7]
Northern Territory §
The NT issues an owner-builder certificate under section 48E of the Building Act 1993.[8] Applicants must be natural persons — individuals, including as trustees — who are the registered owners of the property; a company, trust or other entity cannot apply, and anyone already registered as a prescribed Building Contractor (Residential) in the NT is excluded.[8]
The NT places a specific cap on what an owner-builder can take on: construction of new duplexes or townhouses (Class 1a or Class 2 flats, units or apartments), or extensions to such buildings valued over $25,000, cannot be undertaken by an owner-builder and must go to a registered contractor.[8] A builder's declaration must reach the building certifier within a set period under the Act.[8]
What this means for a kit or modular build §
Every threshold above is assessed on the total value of the building work — labour and materials combined, calculated as if a licensed builder had done it — not on your actual out-of-pocket cost.[1][2] A kit home priced at $80,000 in materials clearly exceeds every threshold on this list regardless of who erects it, and a modular home delivered and craned into place will typically exceed them as well, since the site works, connections and finishing are usually still valued into the total.
If you plan to manage your own kit home assembly, confirm your state's threshold and course requirement with the regulator before signing anything — the course and permit process can take from a few hours to several weeks depending on the state, and in most jurisdictions it must be completed before an application can be lodged, not after work has started.
What is not covered here §
This page does not cover permit and course fees, the content of each state's owner-builder course, rules for owner-builders on commercial or multi-unit projects beyond those noted, or the details of Victoria's small second dwelling provisions. Thresholds and rules change; confirm current requirements with the regulator in your state or territory.
Related guides §
- What is a kit home?
- Kit homes and owner-builders
- Building insurance and warranty schemes by state
- Site works and site costs
- Glossary
Sent to info@modularlivingaustralia.com.au and handled by a person. See Privacy.
References §
- Service NSW — Apply for an Owner-Builder Permit — An owner-builder permit is required to supervise or do building work worth more than $10,000 on a single dwelling-house, dual occupancy or secondary dwelling that requires development consent or is complying development. Eligibility requires being 18 or over, holding a current general construction induction (white) card, being the owner or a joint owner of the land or a shareholder in the company owning it or holding a registered lease of at least 3 years, intending to live in the property once complete, holding an approved DA or CDC, and having completed the owner-builder approved education requirements or equivalent accreditation if the cost of building work is $20,000 or more. Special circumstances evidence is required if a permit has been held in the last 5 years, or for dual occupancy construction. service.nsw.gov.au/transaction/apply-for-an-owner-builder-permit
- Building and Plumbing Commission — What is an owner-builder — States that if the value of the domestic building work is over $20,000, a certificate of consent is required to be an owner-builder; that the value includes labour and materials, estimated as the cost of engaging a registered builder; that an owner-builder can only build or renovate one house every five years and must intend to live in it once completed, with different provisions for small second dwellings; and that an owner-builder who sells within 6 years of completing the work must apply for a Notice of Cover and pay the premium to cover the work under Home Warranty, and is responsible to a subsequent owner for fixing defects or non-compliances for 10 years from completion. bpc.vic.gov.au/owner-builders/what-is-an-owner-builder
- Queensland Building and Construction Commission — About Owner-building — A project costing more than $11,000 requires an Owner-builder permit. Taking out an Owner-builder permit exempts the holder from paying the QLeave levy on work done under the permit. Current QBCC licensees are automatically exempt from completing the Owner-builder course. qbcc.qld.gov.au/home-owner-hub/owner-build/about-owner-building
- Government of Western Australia — Owner-builder approval — An owner-builder is a person who manages building work including constructing a detached dwelling (including a granny flat), carrying out additions and alterations to an existing free-standing dwelling, constructing a non-habitable Class 10 building, or constructing or altering a small commercial building of less than 500 m² floor area. Some low-risk, low-value Class 10a buildings, farm buildings and incidental structures such as swimming pools and retaining walls do not require occupational licensing. wa.gov.au/organisation/service-delivery/owner-builder-approval
- South Australian Government Financing Authority — Owner Builders (Building Indemnity Insurance) — Owner-builders don't need formal trade qualifications to perform building work unless it is specialist work such as plumbing, gas fitting or electrical work. Building indemnity insurance can only be taken out by a person, business or company holding a builder's licence — owner-builders cannot take out this insurance. A person who sells or rents two or more buildings within five years that they have built or improved is considered a building work contractor unless they can prove otherwise, and must be licensed and take out building indemnity insurance. Contracting out any building work costing $20,000 or more requires a written contract with the tradesperson. safa.sa.gov.au/building-indemnity-insurance/owner-builders
- George Town Council (Tasmania), summarising Tasmanian building requirements — Under the Building Act 2016 all building work in Tasmania must comply with the Act and the National Construction Code, and must be designed by a licensed designer, approved by a licensed building surveyor and constructed by a licensed builder, or the owner may apply for an owner-builder licence through Consumer, Building and Occupational Services (CBOS). georgetown.tas.gov.au/news/tiny-homes
- ACT Environment, Planning and Sustainable Development Directorate — Construction licences — In the ACT, owner-builders must be licensed under the Construction Occupations (Licensing) Act 2004, taking on the same responsibilities as a licensed builder to supervise building work and ensure compliance with the Building Act 2004. An owner-builder licence permits work on a specific building approval relating to a Class 1, Class 2 or Class 10a building, and owner-builders are not authorised to undertake specialist building work. The applicant must be the lessee for the block, with co-lessee approval if co-leased, and must meet qualification requirements under the Construction Occupations (Licensing) (Qualifications) Declaration 2024. planning.act.gov.au/professionals/regulation-and-responsibilities/construction-licences
- Northern Territory Building Practitioners Board — Owner-builder certificate application — An owner-builder certificate is issued under Section 48E of the Building Act 1993 (NT). Applicants must not be registered as a prescribed Building Contractor Residential in the Northern Territory, must be a natural person or persons (including as trustees) who are the registered owners of the property, and a company, trust or other entity cannot apply. The construction of new duplexes or townhouses (Class 1a or Class 2 flats/units/apartments), or extensions to such buildings over $25,000, cannot be undertaken by an owner-builder and must be undertaken by a registered contractor. A builder's declaration must be provided to the building certifier no later than 14 days after a specified point under the Building Act. bpb.nt.gov.au/registration/documents/owner-builder-application.pdf
- Building and Plumbing Commission — States that transporting a prefabricated home to land does not require a certificate of consent, as this activity is not considered domestic building work under Victorian law, specifically because section 6(g) of the Domestic Building Contracts Act 1995 excludes the transportation of a building from that definition; states that a certificate of consent may still be required for domestic building work undertaken on-site after the home is delivered, including installation, site preparation, landscaping or other structural work, where the total cost of that work — excluding the cost of the prefabricated home itself and its transportation — exceeds $20,000. bpc.vic.gov.au/owner-builders/becoming-an-owner-builder/certificate-of-consent
- Building and Plumbing Commission — Owner-builder eligibility — Lists the eligibility requirements for an owner-builder certificate of consent in Victoria, including successfully completing the owner-builder eLearning assessment and undertaking construction induction training for the project; states a certificate is not needed where the total cost of work is $20,000 or less. bpc.vic.gov.au/owner-builders/becoming-an-owner-builder/eligibility
Figures are as published by the sources above at their respective dates and are paraphrased summaries, not verbatim reproductions. Verify current pricing and rules directly with builders, lenders and planning authorities.