Koste Chartered Quantity Surveyors 1300 669 400  |  info@koste.ai

Developers · Koste Knowledge Base

What is a Developer's Warranty and How Long Does it Last?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

A developer's warranty is a guarantee provided by the developer covering defects in new constructions. In Australia, it typically lasts for six years for major defects and two years for minor defects, as per state legislation. Consult your local laws for specific durations.

When purchasing a new property, understanding the developer's warranty is crucial. This warranty serves as a guarantee from the developer to the buyer, ensuring that the property is free from certain defects for a specified period. In Australia, the duration and specifics of these warranties can vary based on state legislation, but generally, they cover major defects for up to six years and minor defects for two years.

Under Australian law, a developer's warranty is essentially a statutory warranty mandated by state legislation. For example, in New South Wales, under the Home Building Act 1989, major defects are covered for six years and other defects for two years from the date of completion. Similar provisions exist in other states, each with slight variations. The most common misconception is that these warranties cover all types of defects indefinitely, but in reality, they are limited in scope and time.

To see how this plays out, consider a 2018-built apartment complex in Melbourne. The developer provided a statutory warranty covering major defects for six years. In 2022, a structural defect was discovered, and the repair cost was estimated at $50,000. Because the defect was identified within the warranty period, the developer was responsible for the repair costs, saving the owners corporation a substantial expense. At a 37% marginal tax rate, the tax implication of such repairs would have been significant if not covered by the warranty.

In our experience reviewing thousands of properties across Australia, a few patterns stand out. Firstly, developers often underestimate the importance of documenting their projects thoroughly, which can lead to disputes over what constitutes a defect. Secondly, many investors fail to check the specifics of their developer's warranty, assuming all issues will be covered. Thirdly, we see a lack of awareness about the need for a defects liability period, which is often confused with the warranty period. Lastly, many investors miss the opportunity to negotiate terms of the warranty during the contract phase, which can lead to unfavorable outcomes later.

The answer can differ depending on your situation. For properties completed before 2018, different statutory periods may apply. Additionally, commercial properties may not be subject to the same statutory warranties as residential properties. If the property is in a strata scheme, the owners corporation is usually responsible for claiming under the warranty, which can complicate matters. Also, note that the warranty period may restart if significant rectification work is performed.

Given the complexities and variations of developer's warranties, professional advice is invaluable. A Chartered Quantity Surveyor can assist in assessing the potential defects and warranty claims, while an experienced property lawyer can help interpret the specific legal obligations and rights under state legislation.

  • Review your property's warranty documentation to understand the coverage specifics.
  • Consult a Chartered Quantity Surveyor for an assessment of potential defects.
  • Engage a property lawyer to clarify the legal aspects of your warranty.
  • If defects are found, document them thoroughly and notify the developer promptly.
  • Keep detailed records of all communications and repairs related to warranty claims.
  • Consider negotiating warranty terms before finalizing any new property purchase.
  • Frequently Asked Questions

    What is covered under a developer's warranty?

    A developer's warranty typically covers structural defects and other major issues for a specified period, usually six years for major defects and two years for minor ones. It does not cover wear and tear or damage from misuse.

    How do I make a claim under my developer's warranty?

    To claim under your developer's warranty, document the defect, notify the developer in writing, and provide evidence such as photographs or reports. It's advisable to consult a professional if the developer disputes the claim.

    Does a developer's warranty apply to commercial properties?

    Developer's warranties primarily apply to residential properties. Commercial properties may have different contractual obligations, so it's important to review specific agreements and seek legal advice.

    Are developer's warranties the same in all Australian states?

    No, the specifics of developer's warranties can vary by state. For example, in Victoria, the Domestic Building Contracts Act 1995 governs these warranties, while in New South Wales, it's the Home Building Act 1989.

    How does a developer's warranty affect my tax return?

    Claims under a developer's warranty typically don't affect your tax return directly. However, if you incur repair costs that are not covered, these may be deductible. Consult your accountant for specific advice.

    Related Articles

    Read Full Article Free Calculator
    developer's warrantyproperty defectsAustralian property lawreal estate investmentproperty development

    Written by Koste Team · Koste Chartered Quantity Surveyors · AIQS Member · RICS Member · TPB Registered · 1300 669 400 · info@koste.ai