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WA Owner-Builder Rules Changed in 2026: What to Know Before You Apply
WA Owner-Builder Rules Changed in 2026: What to Know Before You Apply
Planning to build or renovate as an owner-builder in Western Australia?
There are some important rules to understand before submitting your application — including a new $50,000 threshold for certain sheds, garages and carports that took effect on 1 July 2026.
The WA Government is also currently advising that it is experiencing a high volume of owner-builder approval applications, with many applications being processed approximately within six weeks.
For anyone hoping to start building soon, getting the application right the first time is particularly important.
Here's what WA owner-builders need to know in 2026.
Important: Owner-builder approval and building permit requirements are not the same thing. Depending on your project, you may still require a building permit or other approvals even where owner-builder approval isn't required.
What's Changed for WA Owner-Builders in 2026?
One of the most significant changes affects Class 10a buildings.
From 1 July 2026, the threshold at which builder registration requirements apply to Class 10a buildings increased from $20,000 to $50,000.
Class 10a buildings include non-habitable structures such as:
Private sheds.
Garages.
Carports.
Similar non-habitable buildings.
This means a homeowner can now undertake qualifying Class 10a building work valued at less than $50,000 without obtaining owner-builder approval.
For most other types of building work, the existing $20,000 threshold remains.
Importantly, this change does not remove building permit requirements.
A shed, garage or carport may still require a building permit from your local government, along with any other applicable planning or development approvals.
WA Is Currently Experiencing High Owner-Builder Application Volumes
As at 20 August 2026, the WA Government's owner-builder approval page advises:
“We are currently experiencing a high volume of owner-builder approval applications.”
The Department of Local Government, Industry Regulation and Safety advises that while many owner-builder applications are processed promptly — approximately within six weeks — actual processing times can vary.
Two major factors can affect the timeframe:
The volume of applications being received.
Whether the application is complete.
That second point is particularly important.
An incomplete application may require the Licensing team to contact you for further information before the application can be finalised.
Because processing conditions can change, applicants should check the current WA Government processing advice before relying on the six-week timeframe.
Does That Mean Approval Will Take Exactly Six Weeks?
No.
The WA Government describes approximately six weeks as the timeframe in which many applications are processed, not a guaranteed processing period.
Your application may be processed sooner or it may take longer.
If your building project has a planned start date, don't assume you can submit your owner-builder application immediately before construction is due to begin.
Allow sufficient time for the approval process.
When Do You Need Owner-Builder Approval in WA?
Owner-builder approval may be required where:
A building permit is required.
The value of the proposed building work reaches the relevant occupational licensing threshold.
You intend to be named as the owner-builder rather than engaging a registered building contractor.
For most applicable building work, the threshold remains $20,000.
From 1 July 2026, however, the threshold for qualifying Class 10a buildings is $50,000.
That creates an important distinction.
Most Residential Building Work
For applicable residential building work such as constructing or substantially altering a detached dwelling, owner-builder approval may be required where the work exceeds $20,000 and the other requirements are met.
Sheds, Garages and Carports
For Class 10a buildings such as a private shed, garage or carport, the threshold is now $50,000.
A homeowner undertaking qualifying Class 10a work valued below $50,000 does not need owner-builder approval simply because they are carrying out the work themselves.
But remember:
No owner-builder approval does not automatically mean no building permit.
Building a Shed in WA? The $50,000 Rule Is Important
This is probably the 2026 change most likely to catch homeowners by surprise.
Previously, the general $20,000 occupational licensing threshold also captured many larger sheds, garages and carports.
From 1 July 2026, WA increased the threshold for Class 10a buildings to $50,000.
The change reflects the lower risk associated with non-habitable buildings and increases in construction costs.
For example, if you're planning a qualifying private shed valued at $35,000, you may no longer need owner-builder approval simply because the project exceeds $20,000.
However, you still need to determine:
Whether a building permit is required.
Whether development or planning approval is required.
Whether the structure is actually Class 10a.
Whether it complies with applicable building standards.
Whether local planning requirements such as setbacks, height and site coverage are satisfied.
Don't use the $50,000 threshold as a substitute for checking your local government requirements.
What Counts as a Class 10a Building?
Under the National Construction Code, a Class 10a building is a non-habitable building.
Common examples include:
Private garages.
Carports.
Sheds.
Similar non-habitable structures.
This distinction is important.
A structure being called a "shed" doesn't necessarily mean it can legally be used as a bedroom, sleepout, granny flat or other habitable space.
If you're planning to regularly live, sleep or undertake activities requiring a habitable space inside the building, different classification and approval requirements may apply.
If you're unsure about the proposed classification, check with your local government permit authority or building surveyor before proceeding.
You Can't Split a Project to Stay Under the Threshold
Another important rule is that building work that is substantially one project can't simply be divided into smaller contracts to avoid occupational licensing requirements.
For example, you can't artificially break a $30,000 residential building project into several smaller jobs under $20,000 simply to avoid owner-builder or registered builder requirements.
The same principle applies to the new $50,000 Class 10a threshold.
The value of the overall building work matters.
Who Can Apply to Be an Owner-Builder in WA?
Owner-builder approval isn't simply available to anyone who wants to manage a building project.
To be eligible, an applicant generally needs to:
Be an owner of the land.
Apply as an individual rather than a company, trust or other corporate entity.
Demonstrate sufficient knowledge of an owner-builder's duties and responsibilities.
Meet the rules concerning previous owner-builder projects.
Intend to live on, occupy or use the land when the work is completed.
If the project relates to a house, you generally need to intend to reside on the land once the work is completed.
The owner-builder pathway isn't intended to be used simply to construct a property for immediate sale.
The WA Owner-Builder Training Requirement
For most applicants, demonstrating sufficient knowledge is an important part of the owner-builder approval process.
At least one applicant must hold a general construction induction training card — commonly known as a White Card (or an older Blue Card where accepted) — and meet an additional knowledge requirement.
One pathway is completing appropriate owner-builder training.
Importantly, the WA Government specifies that the training must:
Contain Western Australian-specific content, and
Have been completed within the previous 24 months.
This means an old owner-builder course certificate may not satisfy the current application requirements.
It also means a generic owner-builder course that doesn't address WA requirements may not be sufficient.
Already a Building Professional?
Completing an owner-builder course isn't the only pathway available.
Depending on your professional registration, you may be able to demonstrate sufficient knowledge if you:
Hold current or previous Building Practitioner registration in WA.
Are registered as an architect in WA.
Are registered as a building surveyor in WA.
Are registered as a building engineer in WA.
Applicants should check the current WA Government eligibility requirements for their circumstances.
What Documents Should You Have Ready?
One of the easiest ways to avoid unnecessary processing delays is to submit a complete application.
The WA Government specifically advises applicants to make sure the application form is fully completed and all required documents are attached.
This includes evidence of land ownership.
Where you're providing a Certificate of Title, the WA Government requires a current Record of Certificate of Title issued by Landgate within the previous three months.
A qualifying Contract to Purchase may also be used in relevant circumstances and must meet the applicable recency requirements.
Depending on your circumstances, your application may also need evidence relating to:
Owner-builder training.
Your White Card or accepted equivalent.
Professional registration.
Land ownership.
Multiple property owners.
A previous owner-builder approval.
A six-year restriction waiver.
Check the current Form 75 requirements before lodging.
Make Sure You're Using the Current Form 75
WA owner-builder applications use Form 75 — Application for Owner-Builder Approval.
This is another area where applicants need to be careful.
Older versions of Form 75 issued under the former Department of Energy, Mines, Industry Regulation and Safety were only accepted until 31 May 2026.
From 1 June 2026, applications using those old forms are no longer accepted.
If you're using a form you downloaded months ago, don't assume it's still current.
Download the latest version from the WA Government website before applying.
Applying Online May Help Avoid Delays
The WA Government allows owner-builder applications to be submitted online, by post or in person.
Its current processing guidance encourages applicants to use the online submission option.
It also recommends:
Fully completing the application.
Attaching all required documents.
Making sure title or purchase documents are current.
Allowing sufficient processing time before requesting an update.
Licensing officers will contact applicants if additional information is required.
What If There Is More Than One Property Owner?
If the land has multiple owners, this needs to be dealt with correctly on the application.
The WA Government states that the application must be signed by every person listed as a registered proprietor, purchaser under the relevant contract or qualifying lessee.
Each owner then becomes jointly responsible for supervising and managing the building work.
However, only one person is required to demonstrate the required knowledge of owner-builder duties and responsibilities.
That can be particularly useful for couples or other people who jointly own a property.
The Six-Year Owner-Builder Rule
WA limits how frequently a person can undertake owner-builder projects.
Generally, once a building permit has been granted to an owner-builder, the person or people named on the owner-builder approval must wait six years from the date the building permit was issued before making another application.
There are circumstances in which the six-year restriction may be waived, including where:
Hardship would result if the application were refused.
The new building permit relates to the same land as the previous permit or approval.
If an owner-builder approval was issued but never used because a building permit was never granted, different rules can apply.
How Long Is WA Owner-Builder Approval Valid?
Another deadline worth knowing is the validity of the approval itself.
If you don't apply for a building permit, the owner-builder approval generally expires six months after it is issued.
If you apply for the building permit within that six-month period and the permit is granted, the owner-builder approval remains valid for the duration of the building permit.
Building permits are generally valid for two years, although longer periods or extensions may be available through the relevant local government.
Owner-Builder Approval Isn't the Same as a Building Permit
This distinction causes considerable confusion.
Owner-builder approval is issued through the WA Government's licensing process.
It allows an eligible person to be named as the owner-builder for relevant building work.
A building permit, however, is issued through the relevant local government permit authority and authorises the building work itself.
Depending on the project, you may also need planning or development approval.
Think of them as separate questions:
Am I legally permitted to take responsibility for this building work as the owner-builder?
and
Is this building work approved to be constructed on this property?
You may need to satisfy both.
What Responsibilities Do WA Owner-Builders Take On?
Becoming an owner-builder isn't simply a way to avoid hiring a registered builder.
An owner-builder takes on significant responsibilities normally associated with the builder.
These can include:
Obtaining and complying with the building permit.
Managing and scheduling trades.
Maintaining a safe work site.
Supervising the quality of building work.
Ensuring applicable building standards are met.
Obtaining required certification.
Rectifying defective work.
Maintaining appropriate insurance.
Complying with applicable work health and safety requirements.
Importantly, engaging contractors doesn't automatically transfer your statutory owner-builder responsibilities to them.
You remain responsible for managing the project as the owner-builder.
Planning to Sell? Understand the Insurance Rules
Another important responsibility can arise if you sell or dispose of an owner-built property after completing the work.
WA has specific requirements relating to owner-builder work and home indemnity insurance when a property is sold within the applicable period after completion.
The rules can affect both the owner-builder and a future purchaser, and failing to comply with applicable requirements can have serious consequences.
If you're considering selling an owner-built property within seven years of completion, check the current WA Government requirements before entering into a contract for sale.
Don't assume that finishing the building work ends your owner-builder responsibilities.
This is a separate area of WA owner-builder law with its own requirements, so make sure you obtain current information before selling.
WA Owner-Builder Application Checklist
Before submitting your application, check:
Am I eligible to apply as an owner-builder?
Is owner-builder approval actually required for my project?
If I'm building a Class 10a shed, garage or carport, have I checked the new $50,000 threshold?
Do I have the current Form 75?
Is my Certificate of Title or Contract to Purchase current enough?
Have all property owners completed the required sections?
Do I have a current White Card or accepted equivalent?
Does my owner-builder training contain WA-specific content?
Was my owner-builder training completed within the previous 24 months?
Have I attached all required supporting documents?
Have I allowed sufficient time for processing before my planned construction date?
Have I separately checked the building permit and planning requirements with my local government?
If I may sell the property after completing the work, have I checked the WA owner-builder resale and home indemnity insurance requirements?
A few extra minutes checking your application before submission may save considerably more time later.
Frequently Asked Questions
How long does WA owner-builder approval take?
As at 20 August 2026, the WA Government advises that it is experiencing a high volume of owner-builder approval applications.
The Government says many applications are processed approximately within six weeks, but actual processing times can vary depending on application volumes and whether the application is complete.
Check the current WA Government processing advice when you're ready to apply, as processing conditions can change.
Do I need owner-builder approval for work under $20,000 in WA?
For many types of building work, occupational licensing requirements generally apply where a building permit is required and the estimated value exceeds the relevant threshold.
The general threshold remains $20,000, but different rules now apply to qualifying Class 10a buildings.
Always check whether a building permit or other approval is required regardless of project value.
Do I need owner-builder approval to build a shed in WA?
From 1 July 2026, qualifying Class 10a buildings such as private sheds, garages and carports valued at less than $50,000 can be built by a homeowner without obtaining owner-builder approval.
Building permit, planning and other approval requirements may still apply.
Do I still need a building permit for a shed under $50,000?
Potentially, yes.
The change to the $50,000 threshold relates to builder registration and owner-builder approval requirements. It does not remove existing building permit requirements.
Check with your local government before starting work.
How recent does my WA owner-builder course need to be?
Where owner-builder training is being used to demonstrate sufficient knowledge, the WA Government requires the training to contain Western Australian-specific content and to have been completed within the previous 24 months.
Do I need a White Card to apply as an owner-builder in WA?
At least one applicant must have a general construction induction training card — commonly known as a White Card or accepted older Blue Card — together with one of the accepted pathways for demonstrating sufficient owner-builder knowledge.
How long does WA owner-builder approval last?
If no application for a building permit is made, owner-builder approval generally expires six months after it is issued.
If a building permit application is made within that period and the permit is granted, the owner-builder approval remains valid for the duration of the building permit.
Can I use an old Form 75?
Be careful.
Previous versions issued under the former department were only accepted until 31 May 2026. Applications submitted on those old versions after 1 June 2026 are not accepted.
Download the current Form 75 before applying.
What happens if I sell an owner-built property in WA?
Specific requirements can apply when an owner-builder sells or disposes of a property within the applicable period after completing owner-builder work, including requirements relating to home indemnity insurance.
If you're considering selling within seven years of completion, check the current WA Government requirements before entering into a contract for sale.
Ready to Apply for Owner-Builder Approval in WA?
One of the requirements for many WA applicants is demonstrating sufficient knowledge of an owner-builder's duties and responsibilities.
The Owner Builder Institute WA Owner Builder Course contains Western Australian-specific content and is designed to help you understand the responsibilities you're taking on before managing your own project.
100% online • Study at your own pace • WA-specific owner-builder training
Related Owner Builder Institute Resources
Important Information
This article provides general educational information only and is not legal, building, planning, insurance or compliance advice.
Owner-builder, occupational licensing, building permit, planning and insurance requirements depend on the nature, value, classification and location of the proposed building work and the individual circumstances of the project.
Always check the current requirements with the Western Australian Government and your relevant local government before starting building work or making decisions about an owner-built property.
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