South Australia BII Timing: When Must It Be in Place Before a $20,000+ Job?

A $20,000+ plumbing invoice does not automatically trigger South Australian building indemnity insurance (BII): SA Government guidance, dated 19 February 2026, applies to domestic building work that must be approved by council and costs $20,000 or more, with the contractor responsible for arranging and paying for the policy. That guidance says building work cannot start until the policy has been taken out and both the homeowner and council have received a copy of the certificate of insurance.

Figures checked 1 October 2026.

Does a $20,000 plumbing job always need BII?

Use the work, approval and value tests rather than the plumbing invoice alone:

A plumbing job may involve building work, but the $20,000 amount on its invoice does not by itself establish whether the BII requirement applies. The official guidance does not classify every type of plumbing work, so an uncertain job should be checked with the insurer and the relevant regulator before work starts.

The threshold also has a dated history. The South Australian Government Financing Authority (SAFA) records that the $12,000 minimum applied before 10 November 2025 and increased to $20,000 from 10 November 2025. For qualifying building work, BII is required for every contract entered into.

When must the policy and certificate be in place?

The contractor must follow this sequence:

1. Arrange and pay for the policy. Builders seeking eligibility can use an insurance broker, which can facilitate eligibility with QBE, Assetinsure or AB Phillips. Direct arrangement is also available with Assetinsure or AB Phillips.
2. Put the policy in place. The BII policy is issued in the homeowner’s name.
3. Provide the certificate. Both the homeowner and the council must receive a copy of the certificate of insurance.
4. Start the building work only after those actions are complete. Arranging cover is not the final step; the policy must be taken out and the certificate delivered as required.

The official guidance does not set out a fixed number of days before work. It makes policy issue and delivery of the certificate preconditions to starting the building work.

How can the certificate be checked?

The homeowner should confirm the policy directly with the insurer. SAFA lists the following validation routes and contacts:

Check that the certificate contains:

• the builder’s name and licence number;
• the insurance company;
• the policy issue date;
• a description of the insured work; and
• any policy limitations or conditions.

Keep a copy for the homeowner’s records and ask the insurer to verify the details and explain how the policy operates.

What does BII cover?

BII protects the homeowner against financial losses, up to the policy’s maximum limit, if the builder dies, disappears or becomes insolvent before the work is completed or before defective work can be rectified. The SA Government also describes the protection as extending to future owners in relation to unfinished and defective work.

Claims for defective work can usually be made up to five years from the date the building work was completed. A homeowner who may have a claim should contact the insurer first.

BII does not replace the need to protect and separately insure property owned by the homeowner at the construction site, or to insure the building once construction is complete.

How much cover does the policy carry?

The maximum limit depends on the insurer and the policy issue date shown by SAFA:

The certificate and policy PDS should be checked for the applicable limit, exclusions and conditions.

What should happen if the certificate is missing?

If covered building work has not started and the certificate is not in place, do not begin. Ask the contractor to arrange the policy and provide the certificate, then confirm the details with the insurer.

If the classification of the work is unclear, seek confirmation before relying on the threshold. Consumer and Business Services is South Australia’s building licence regulator.

This is general information, not financial or legal advice. Check the current regulator page and the policy’s PDS before relying on the requirements for a particular job.

Sources

• Building indemnity insurance | SA.GOV.AU
• Building Indemnity Insurance | South Australian Government Financing Authority

FAQ

Does every $20,000+ plumbing job need BII in South Australia?

No. The work must be domestic building work requiring council approval and costing $20,000 or more. The value on a plumbing invoice alone does not settle the classification.

Can work start once the builder has arranged the policy?

No. The policy must be taken out, and both the homeowner and council must receive the certificate of insurance, before the building work starts.

How can the homeowner validate the certificate?

Confirm it with the insurer. SAFA lists certificate validation routes for QBE and Assetinsure; AB Phillips certificates can be validated by calling 1300 242 136.

How long is the defective-work claim period?

Defective-work claims can usually be made up to five years from the date the building work was completed. Contact the insurer first if a claim may apply.

Who arranges BII, and can a homeowner cover their own work?

The building contractor must arrange and pay for BII where the requirements apply. A homeowner carrying out the building work themselves cannot take out BII.