Does a Victoria Carpentry Renovation Over $10,000 Need a Written Major Building Contract?

Yes—if a Victoria carpentry or joinery project is a renovation, alteration, extension, repair or other improvement to a home and is worth more than $10,000, Consumer Affairs Victoria says a major domestic building contract must be in writing with the client (guidance dated 24 September 2025). The Building and Plumbing Commission (BPC) separately requires a registered builder for domestic building work worth more than $10,000; that threshold includes labour, building materials and GST and should cover the project’s total value (guidance dated 30 June 2026). Figures checked 1 October 2026.

Which carpentry and joinery work falls within the rule?

Consumer Affairs Victoria describes major domestic building work by its connection to the home, rather than naming every carpentry or joinery task separately.

Where carpentry or joinery forms part of a broader home renovation, the overall project context matters. A contract solely for landscaping such as planting a lawn would not generally be considered domestic building work, but landscaping forming part of a renovation may fall within the listed examples.

The BPC also says people building a new home, adding an extension or carrying out structural repairs will likely need to engage a building practitioner.

Does every job worth more than $10,000 need a major domestic building contract?

No. The value is important, but so is the nature of the work.

Consumer Affairs Victoria lists jobs involving only certain work as not requiring a major domestic building contract, including:

• plastering;
• wall or floor tiling;
• electrical work;
• glazing;
• insulating;
• painting;
• plumbing, gas-fitting and draining;
• installing floor coverings;
• attaching awnings, security screens, insect screens or balustrades;
• erecting a chain-wire fence around a tennis court; or
• erecting a mast, pole, antenna, aerial or similar structure.

These are exemptions from the major domestic building contract requirement for jobs involving only the listed work. They should not be treated as removing the requirement when that work forms part of a wider home renovation or construction project.

For work worth $10,000 or less, Consumer Affairs Victoria recommends using a written contract for all building work. This helps both parties understand the work and resolve disputes.

How should the $10,000 threshold be calculated?

For the BPC’s registered-builder threshold, the amount must include:

• labour;
• building materials;
• GST; and
• the project’s total value.

If the resulting total is more than $10,000, a registered builder is required for the domestic building work.

These are related requirements, but they come from different regulator guidance. The explicit instruction to include labour, materials and GST comes from the BPC’s registered-builder threshold. The Consumer Affairs Victoria page states the contract threshold but does not separately define its calculation in the same way.

What should happen before the renovation starts?

A practical sequence is:

1. Identify the type of work. Check whether the carpentry or joinery forms part of a renovation, alteration, extension, repair, improvement or other listed domestic building project.
2. Calculate the project’s total value. For the BPC threshold, include labour, building materials and GST.
3. Use an appropriately registered practitioner. Registration categories and classes determine the work that can lawfully be undertaken.
4. Use a written major domestic building contract when required. For major domestic building work worth more than $10,000, the contract must be in writing with the client.
5. Provide the Domestic Building Consumer Guide before signing. The builder must give the client a copy before the client signs the major domestic building contract.

How can I check a builder or practitioner’s registration?

The BPC says to use a registered building practitioner so the work is completed by a practitioner or company with the necessary qualifications and experience.

Individual registered practitioners are issued with a Photo ID card showing their registration category and the work they are eligible to complete. Companies do not receive this Photo ID card. Before engaging an individual, check that the card and registration category are suitable for the proposed work.

You can also search the BPC disciplinary register for records against a practitioner or company. It records disciplinary action and may include listings for breaches of the Building Act 1993, Building Regulations 2018 or Domestic Building Contracts Act 1995.

A listing does not automatically mean the practitioner or company should not be used. The BPC suggests considering the disciplinary record alongside:

• personal recommendation;
• price;
• evidence of work quality;
• professional status; and
• your own judgement of their character.

The BPC does not recommend practitioners for a particular project.

What changes if the client is an owner-builder?

Owner-builder status on the building permit does not remove all requirements. Even where the client is the owner-builder, the builder must be BPC-registered and use a major domestic building contract when handling a contract worth more than $10,000.

A builder must also be BPC-registered to reblock, restump, demolish or remove a home, regardless of the value of that work. The fact-pack guidance does not state that those four categories automatically require a major domestic building contract at every value, so those requirements should not be combined without checking the current regulator guidance.

Is domestic building insurance triggered at the same threshold?

No. Consumer Affairs Victoria’s guidance, dated 24 September 2025, separately says the builder must take out domestic building insurance for the client when the work is worth more than $16,000.

The BPC also warns that work valued at more than $10,000 and carried out by an unregistered builder or tradesperson is not covered by domestic building insurance. An owner may also have no protection from poor-quality work. The BPC can investigate and prosecute an unregistered person who carries out work requiring registration.

This is general information, not financial or legal advice. Check the current regulator page before engaging anyone, and read the relevant policy’s Product Disclosure Statement (PDS).

Sources

• Engaging a builder — Building and Plumbing Commission
• What work requires a building contract? — Consumer Affairs Victoria

FAQ

Does a renovation worth exactly $10,000 need a major domestic building contract?

No. The major domestic building contract requirement applies when the work is worth more than $10,000. Consumer Affairs Victoria nevertheless recommends a written contract for all building work worth $10,000 or less.

Does the $10,000 threshold include labour, materials and GST?

Yes for the BPC’s registered-builder threshold. The amount must include labour, building materials and GST and should cover the project’s total value.

Can an owner-builder avoid the registration and contract requirements?

No. Even if the client is the owner-builder on the building permit, the builder must be BPC-registered and use a major domestic building contract for a contract worth more than $10,000.

When must the Domestic Building Consumer Guide be provided?

The builder must give the client a copy before the client signs the major domestic building contract.