The defects liability period, explained properly

What it is, and what it is not

The defects liability period, called the rectification period in some contracts and the maintenance period in older ones, is a defined window after practical completion during which the contractor has both the obligation and, importantly, the right to return and fix defects in their own work.

The right matters as much as the obligation. It is generally cheaper for a contractor to rectify their own defect than to pay someone else to, so the clause protects them as well. If a client brings in another trade without giving the contractor the opportunity to rectify, the client can find they have undermined their own claim for the cost.

It is not a warranty, it is not a guarantee of the building, and it is not the end of the contractor’s liability. It is a contractual mechanism with a defined start, a defined end, and a defined process. Liability for defective work continues well past it under general law and, for residential work, under statute.

How long it runs

The period is set in the contract particulars, so the only reliable answer is to read your own contract. As a guide to what is typical:

• Australian standard forms commonly use twelve months from the date of practical completion. AS 4000 and AS 2124 both work this way, with the period stated in the annexure.
• UK JCT contracts use a rectification period entered in the contract particulars. Six months and twelve months are both common, with twelve more usual on anything with significant services.
• NEC contracts use a defects date and a defect correction period, which work differently: the defect correction period is the time allowed to fix each individual defect once notified, rather than the overall window.

Watch for two things. A period that runs from practical completion means an early certification shortens your protection, which is another reason not to certify under pressure. And many contracts extend the period for any element that was rectified during it, so a repaired item gets a fresh clock rather than inheriting the original end date. That extension is frequently overlooked by clients and is worth checking for.

Statutory rights run much longer

This is the part that surprises people. The contractual period is short. The statutory and common law exposure behind it is not, particularly for residential work.

In New South Wales, the Home Building Act provides statutory warranties for residential building work, currently six years for a major defect and two years otherwise, running from completion. In Victoria, building actions are subject to a long stop of ten years from the date of the occupancy permit or certificate of final inspection. Other Australian states have their own equivalents, and the periods are not identical.

In the United Kingdom, a claim in contract is generally available for six years, or twelve where the contract is executed as a deed, and new build homes are typically covered by a warranty such as NHBC Buildmark which runs for ten years with the builder responsible for the first two.

The practical consequence is that a contractor who says “we are past the twelve months so it is not ours” is describing the contractual mechanism, not their actual exposure. And a client who misses the contractual window has lost a convenient process, not necessarily a remedy.

Who pays for what

The contractor bears the cost of rectifying defective work, meaning work that does not comply with the contract. The client bears the cost of everything else, and the boundary is where the arguing happens.

• Defective work is the contractor’s cost. Something built or installed wrongly, or with materials that were not what was specified.
• Fair wear and tear is the client’s. A period of occupation produces marks, and the contractor did not cause them.
• Damage after handover is the client’s, whether caused by occupants, by a fit out contractor or by a removal firm. This is why the photographic record taken at practical completion is worth so much.
• Failure to maintain is the client’s. A boiler that was never serviced, or gutters never cleared, produces consequences the contractor is not responsible for.
• Shrinkage and settlement in the first year sits in the middle. Most contracts and warranty schemes treat normal drying shrinkage as expected behaviour, with the builder making good once at the end of the first year rather than repeatedly.

Getting out of it cleanly

The end of the period is not automatic and it is not just a date passing. There is normally a process, and skipping it leaves both parties exposed.

Before the period ends, the client or superintendent inspects and issues a final schedule of defects. Do this with genuine time to spare rather than in the final week, because the contractor is entitled to a reasonable opportunity to rectify, and an inspection carried out three days before expiry does not give them one.

The contractor rectifies. The items are re-inspected and closed individually. Only then does the certificate of final completion, or its equivalent, get issued, and the second half of retention becomes payable. Retention is the entire reason this process gets completed at all, and a client who has already released it will find the last few items take a very long time.

Why your records decide the outcome

Almost every defects dispute reduces to one question: was this condition present at handover, and if so, was it recorded. Everything else is two people remembering a building differently a year later.

The side with dated, located, photographed records wins, and it is not close. Specifically:

• A dated photographic record of the building at practical completion, covering the areas that were correct as well as the ones that were not
• A defect register where each item has its own photographs, a location precise enough to stand alone, and the trade responsible
• A closure date and a resolution note against every item, kept in the register rather than deleted, so a recurrence is visibly a recurrence
• The correspondence trail: when the list was issued, to whom, and what they said in reply

Keeping that in a phone gallery and a chain of text messages is what loses arguments. Keeping it in a register that exports as a dated PDF is what wins them, which is what Site Audit was built to produce. The practical detail of writing items that hold up is in the guide to writing a defect report that gets fixed.