Letter · Construction & Infrastructure
Residential building defects notice and claim letter (statutory warranties, NSW)
Owner's letter to a builder giving written notice of defects under s 18BA of the Home Building Act 1989 (NSW), identifying the s 18B statutory warranties breached, offering access to rectify and recording the warranty periods in s 18E.
- Kind
- Letter. A letter or email you adapt and send.
- Where it applies
- New South Wales
- AI use
- Yellow AI can help in set ways. A lawyer checks specific points before use.
- Law stated as at
- 18 October 2026
- Status
- Maintained. Checked on 18 October 2026 against the 5 authorities it cites, for New South Wales.
- Version
- 1
- Source
- Written for this library
When to use it
Use for a homeowner, successor in title or owners corporation as soon as defects in residential building work become apparent, and in any case within 6 months of that date, so the owner meets its duty to notify and keeps its claim within the 2-year or 6-year warranty period.
Used for these tasks
Each task page says how far AI may help with the task and what the lawyer must review.
How AI may be used
AI may build the defects schedule from the inspection report and photographs and fill the letter; a lawyer decides which warranties are breached, whether a defect is a major defect and the warranty dates.
AI may
- Turn the building consultant's report into a numbered defects schedule with location, description, photograph reference and the expert's proposed rectification
- Extract the contract date, completion date, builder licence number and parties from the contract and occupation certificate
- Calculate candidate warranty end dates for the lawyer to confirm
AI must not
- Must not classify a defect as a major defect or allocate it to a warranty without the lawyer and the building expert
- Must not describe a defect beyond what the expert report says
- Must not refuse, limit or set conditions on access for rectification beyond what the owner has instructed
The lawyer checks
- The date each breach became apparent, so the 6-month notice duty in s 18BA(3)(a) is met
- Which s 18B warranties apply to each defect, and which defects are major defects within s 18E(4)
- The completion date and warranty end dates, including any extension under s 18E(1)(e)
- The client's standing (original owner, successor in title or non-contracting owner) and whether the builder is still trading or home building compensation cover should be notified
Method: how the Green, Yellow and Red levels are decided. This is guidance for planning, not legal advice.
Read the full text
The full text is for signed-in accounts. It is free. When you sign in you can:
- read the whole precedent, with its drafting notes beside it;
- copy it, or download it as a Word file or Markdown;
- add it to your firm’s knowledge base, so colleagues can find it;
- let the AI tools you connect read it from that knowledge base.
The summary, the law it rests on and the AI-use guidance above stay public. Privacy.
More in Construction & Infrastructure
- Security of payment: payment claim (NSW base, with Victorian, Queensland, NZ and UK variants)
- Notice of dispute under a construction contract (AS 4000 family and bespoke contracts)
- Security of payment: payment schedule with reasons for withholding (NSW, with Queensland and Victorian notes)
- Deed of novation of a design consultant to a design and construct contractor
- Queensland adjudication application (QBCC approved form): preparation guide
- Notice of delay and claim for extension of time under a construction contract
- Covering letter to a principal contractor serving a payment withholding request (NSW)
- Contract clause: AI-generated design, BIM data and practitioner responsibility
- Protocol for AI use in expert delay and quantum analysis (construction disputes)
All precedents for Construction & Infrastructure · Tasks and AI use in this area