A formal written defect notice is the single most important document you can send your builder when you have unresolved defects. It is the document that starts the clock on the builder’s obligation to respond. It creates a paper trail that building authorities and tribunals rely on. And it is the difference between having enforceable rights and having a verbal complaint that a builder can deny or ignore.
This guide explains what to include, provides a template you can use immediately, and walks through what to do after you send it.
Why a written notice matters
Australian consumer law and state building legislation give you significant rights as a homeowner — but exercising those rights almost always requires written notice. Here’s why:
It creates a legally enforceable record. A phone call or verbal conversation cannot be proven. An email is dated, deliverable, and preserved. If your matter goes to a building authority or tribunal, your written notice is the evidence that shows you gave the builder a reasonable opportunity to rectify before escalating.
It starts the response clock. Builders have a reasonable period to respond to a defect notice. If they don’t respond within your stated timeframe, you can escalate without further delay. Without a formal written notice, there’s no starting point.
It establishes the formal defects list. Under most Australian building contracts (HIA, MBA), the builder’s obligation to rectify is triggered by a written defects list. Verbal requests don’t count.
It protects you at tribunal. At QCAT, NCAT, VCAT, or any other tribunal, the first question asked of homeowners is always: “Did you give the builder a formal opportunity to fix the defects before you came here?” A formal written notice is your answer.
What a defect notice should include
A defect notice does not need to be legal jargon. It should be clear, specific, and professional. Include:
- Date and delivery method — email is fine. Keep the sent email as evidence.
- Your details — full name, property address, contract reference number
- Builder’s details — company name, licence number, contact person
- Description of each defect — specific location, specific description. Not “the bathroom is wrong” but “the shower screen in the ensuite is not sealed at the base, and water is penetrating the grout line at the left-hand edge.”
- Date of first discovery — relevant to warranty period arguments
- Reference to your warranty rights — DLP, statutory warranty, Australian Consumer Law
- Specific response deadline — “Please confirm in writing by [date] the steps you will take to rectify these defects and the proposed completion date.”
- Statement of intent to escalate — “If we do not receive a response by this date, we will escalate this matter to [QBCC / NSW Fair Trading / DBDRV / relevant authority].”
Defect notice template
Copy and adapt this template. Replace all bracketed text with your specific details.
[Your full name] [Your property address] [Your email] [Date]
[Builder’s company name] [Builder’s address or email] Attention: [Builder’s name or contracts manager]
Subject: Formal defect notice — [Property address] — Contract reference [XXX]
Dear [Builder’s name],
I am writing to formally notify you of defects in the building work at [property address], performed under our building contract dated [contract date].
I am aware that the defects liability period (DLP) for this property is [X months] from practical completion on [practical completion date], expiring on [DLP expiry date]. I am also aware of my statutory warranty rights under [relevant legislation — e.g., the Queensland Building and Construction Commission Act 1991 / the Home Building Act 1989 NSW / the Domestic Building Contracts Act 1995 VIC].
The following defects have been identified:
Defect 1:
- Location: [e.g., Main bathroom — shower recess, left-hand wall]
- Description: [e.g., Waterproofing membrane is visibly failing at the junction between the wall and floor. Water is penetrating the grout line and is visible on the adjacent plasterboard wall. First noticed: [date].]
- Severity: [Major / Minor]
Defect 2:
- Location: [e.g., Living room — west wall, skirting board]
- Description: [e.g., Skirting board has separated from the wall, leaving a gap of approximately 8mm. Paint finish does not cover the gap. First noticed: [date].]
- Severity: [Minor]
[Continue for all defects — be as specific as possible. Photographs are attached.]
Please confirm in writing by [date — 14 days from today for minor defects; sooner for anything affecting habitability or safety] the steps you intend to take to rectify these defects and the proposed completion date for each item.
If I do not receive a response by this date, I will escalate this matter to [QBCC / NSW Fair Trading / DBDRV / Building Commission WA / CBS SA] and seek formal intervention.
Please treat this notice as a formal defects list under our building contract and under the applicable statutory warranty provisions.
Yours sincerely,
[Your full name] [Your phone number] [Attachments: defects report / photographs]
After you send the notice
If the builder responds and proposes a rectification schedule
Get their response in writing (if it comes by phone, follow up immediately with an email: “Thanks for your call — can you confirm in writing that you’ll attend on [date] to fix items 1, 2, and 3?”).
Keep a record of every commitment they make and whether they honour it. Track the status of each item in Checka.
If the builder disputes the defects
If the builder claims the issues are “normal” or “within tolerance” or “not their responsibility,” don’t accept this verbally. Ask them to provide their position in writing, with reference to the specific standard or Australian Standard they’re relying on.
Many “within tolerance” claims are incorrect. Australian Standards have specific tolerances for paint finish, tile installation, door operation, and other common defect categories. If you’re unsure whether a builder’s claim is correct, an independent building inspector can assess the defect against the applicable standard.
If the builder doesn’t respond
If the deadline passes with no response:
- Send a follow-up email — short and factual: “I refer to my notice dated [date]. As no response has been received by the deadline stated, I am now escalating this matter to [authority].”
- Contact your state building authority (QBCC, NSW Fair Trading, DBDRV, etc.)
- Attach your original notice, the follow-up, and your Checka defects report to your complaint
The building authority complaint form will ask whether you gave the builder written notice and a reasonable opportunity to respond. Your notice and follow-up email are the evidence that you did.
How long should you give the builder?
14 days is the standard period for minor defects — paint, tiles, doors, minor plumbing. This is specific enough to create urgency but reasonable enough to withstand scrutiny at a tribunal.
Immediate or urgent for anything affecting habitability or safety — a non-functional toilet, water penetrating a living area, non-compliant smoke alarms. State in your notice that this is urgent and request a response within 48 hours.
30 days if the defect is major but not immediately dangerous and the builder will need to mobilise tradespeople — for example, a waterproofing failure requiring tile removal.
Whatever deadline you set, make sure it’s in the notice — and hold to it.
One notice is usually not enough
Most homeowners need to send at least two letters before escalating — the original notice and a follow-up. Some builders respond to the follow-up. The follow-up itself is a valuable document because it demonstrates that you gave the builder a second opportunity.
Three pieces of written communication — original notice, follow-up, escalation notification — is typically what a building authority or tribunal expects to see before they’ll take your complaint seriously.
Using Checka to prepare your defect notice
Your defect notice is only as strong as the documentation behind it. Checka gives you:
- Timestamped photographs — proves when you first observed each defect
- Specific descriptions — Checka prompts you to describe each defect in detail, which you can copy directly into your notice
- Professional PDF report — attach this to your email as the formal defects schedule
- Builder notification log — track when you sent notices and what response you received
Export your Checka report and attach it to your defect notice. A professional formatted report with photographs and dates is significantly harder for a builder to dismiss than an informal list.
Key Takeaways
- A formal written defect notice is the document that starts the builder’s obligation to respond — verbal complaints are not enforceable
- Your notice should include: specific defect descriptions with locations, dates of first discovery, reference to your warranty rights, a specific response deadline, and a statement of intent to escalate
- Give 14 days for minor defects; request urgent response for anything affecting safety or habitability
- If the builder doesn’t respond by the deadline, escalate to your state building authority — your notice is the evidence that you gave them a reasonable opportunity to act
- Attach your Checka defects report to every written notice — a timestamped, photo-backed report gives you the strongest possible position
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