The defects liability period (DLP) is one of the most important protections for Australian home owners and commercial property owners after construction is completed. During this period — typically 6-12 months for minor defects — the builder is obligated to return and fix any defects at their own cost. But the DLP is not the same as the statutory warranty period, which runs much longer (6-7 years for major defects in most states). Understanding the difference, and making sure your contract properly provides for both, can save you tens of thousands of dollars in rectification costs.
What is a Defects Liability Period?
The defects liability period (DLP) is a contractual period — typically commencing at practical completion — during which the builder must rectify any defects reported by the owner. It is separate from, and usually shorter than, the statutory warranty period provided by state building legislation. Retention monies are usually held until the DLP expires.
Red flags to watch for
While state minimum warranty periods cannot be contracted out of, a short DLP reduces the practical window during which the builder will return and fix issues without dispute. Industry standard is 12 months.
Retention (typically 2.5-5% of the contract sum) is held during the DLP to incentivise the builder to return and fix defects. Without it, you have limited leverage.
Some defects (e.g., waterproofing failures) may not appear until after the DLP. The contract should not purport to extinguish statutory warranty rights.
You should have the right to engage an independent building inspector before accepting practical completion and signing off on the DLP commencement date.
Practical completion triggers the DLP. If the builder can declare PC without the owner's agreement, the DLP may start running before defects are identified.
If a defect creates a safety hazard (e.g., electrical fault, structural failure) during the DLP, the contract should provide for emergency rectification, including the owner's right to engage another contractor at the builder's cost.
Your legal rights
Each state has building legislation providing statutory warranties: NSW — Home Building Act 1989 (s 18B: 6 years for major defects, 2 years for minor defects); VIC — Domestic Building Contracts Act 1995 (s 8: 10 years for structural, 6 years for non-structural); QLD — Queensland Building and Construction Commission Act 1991 (s 68: 6 years 6 months); WA — Building Services (Complaint Resolution and Administration) Act 2011; SA — Building Work Contractors Act 1995. These warranties cannot be contracted out of. Standard form contracts (AS 4000, HIA, MBA) all provide for DLPs and retention.
Questions to ask before you sign
- 1What is the defects liability period, and when does it commence?
- 2Is there a retention clause, and what percentage is held?
- 3How do I report defects during the DLP, and what is the response time?
- 4Can I engage an independent inspector at practical completion?
- 5Does the contract preserve my statutory warranty rights beyond the DLP?
- 6What happens if the builder fails to rectify defects during the DLP — can I engage another contractor?
- 7What is the process for emergency defect rectification?
Disclaimer: This guide is for educational purposes only and does not constitute legal advice. Contract law varies by jurisdiction and individual circumstances. Always consult a qualified legal professional before making decisions based on this information.