How to document construction defects — a practical guide for homeowners

When a construction defect gets ignored, it’s rarely because the builder didn’t know about it. More often, it’s because the homeowner couldn’t clearly prove when the issue was reported, what exactly was wrong, and what response (if any) they received.

Good documentation changes that. A clear, timestamped defects record is the difference between a builder saying “that was already there” and having to fix the problem.

This guide explains how to document construction defects effectively — from the moment you spot something on-site through to a formal dispute if one arises.

Why documentation matters

Under Australian Consumer Law (ACL) and state building legislation, builders have an obligation to rectify defects during the defects liability period (DLP) and for major or structural defects for 6–10 years depending on your state. But exercising those rights requires evidence.

If you end up before a tribunal — QCAT (Queensland), NCAT (NSW), VCAT (Victoria), or similar — the strength of your case will largely depend on:

• When you first identified and reported the defect
• How specifically you described it
• Whether the builder was formally notified
• What response they gave (or didn’t give)

Building inspectors and tribunal members aren’t mind readers. They need clear, specific evidence. A photo taken with a mobile phone and a brief description entered into Checka is more useful than a memory of a conversation that happened six months ago.

The fundamentals of good defect documentation

1. Photograph it properly

A blurry photo taken from five metres away in poor light won’t help you. For each defect:

• Get close enough to clearly show the issue
• Use multiple angles — one close-up, one showing the location in context
• Use a reference object for scale (a coin, ruler, or your hand) if the size of the defect matters
• Capture the light to show the texture — for paint defects, photograph at an angle to the wall surface so the light rakes across it
• Turn flash off if it’s washing out the detail; natural light or indirect light usually works better

2. Write a specific description

“Crack in wall” is not useful. “Diagonal crack approximately 4mm wide at top, narrowing to hairline at bottom, running from top-right corner of window in main bedroom toward ceiling” — that’s a description a building inspector can work with.

For each defect, describe:

• Exactly where it is (room, which wall, distance from features like windows or corners)
• What it looks like (size, colour, shape, texture)
• What you think may be causing it (you don’t need to be certain — builders can assess)
• Whether it’s changed since you first noticed it (growing, worsening, spreading)

3. Note when you discovered it

Timestamp matters. For warranty purposes, what counts is when you discovered the defect, not necessarily when it occurred. If you discover a waterproofing failure 18 months after handover, your warranty clock typically starts from discovery — but you need to prove when that discovery was made.

Using Checka automatically captures the date and time of every photo and log entry. This creates an unambiguous record.

4. Categorise severity

Not all defects are equal. Classifying severity helps prioritise what needs urgent attention and informs your communication with the builder:

• Critical: Safety risk, active water ingress, structural concern — requires immediate attention
• Major: Significant functional impact (door won’t close, shower not draining, bathroom not waterproof)
• Minor: Cosmetic (paint inconsistency, grout colour variation, small scratch)

Checka’s AI assist can suggest severity based on your photo and description.

5. Organise by location

When you’re generating a defects report to share with a builder or inspector, organised by room or space is far clearer than a single chronological list. Structure your records as:

• External / site
• Kitchen
• Main bedroom
• Bathroom 1, Bathroom 2
• Living / dining
• etc.

This makes it easy for the builder’s site supervisor to walk through the property and address items systematically.

How to formally notify your builder

Documentation in Checka is your working record. Formal notification to your builder should be in writing — email is fine and creates its own timestamp and delivery record.

Your notification should include:

• A clear description of the defect(s)
• Your defects report or list (Checka’s exported report works well here)
• A reasonable timeframe for response (typically 14–21 days for minor defects; prompt response expected for major issues)
• Reference to your contract and the applicable warranty period

Keep copies of all correspondence. If your builder responds verbally, follow up in writing: “As discussed today, you agreed to address the cracked tiles in the main bathroom by [date]. I’m noting this for our records.”

When to escalate

If your builder:

• Doesn’t respond within a reasonable period
• Disputes defects that are clearly present
• Attempts work that makes the issue worse
• Refuses to acknowledge the defect at all

…your next step is your state building authority.

State	Authority
Queensland	QBCC (Queensland Building and Construction Commission)
New South Wales	NSW Fair Trading
Victoria	DBDRV (Domestic Building Dispute Resolution Victoria)
South Australia	CBS (Consumer and Business Services)
Western Australia	Building Commission WA

At this point, your Checka record — with photos, descriptions, dates, and correspondence — becomes your case file.

A practical documentation workflow

1. Spot an issue → Open Checka, photograph and log immediately
2. Add description and location tag → Be specific
3. Assign severity → Critical / Major / Minor
4. Review weekly → Check for new issues or changes to existing ones
5. Before formal notification → Generate Checka report, review for completeness
6. Send written notice to builder → Attach report, keep email copy
7. Log builder’s response → Note date, what they agreed to, timeframe
8. Follow up → If deadline passes without action, log that too
9. Escalate if needed → Submit report to building authority

Key Takeaways

• Documentation is what makes defects claimable — verbal complaints are hard to prove
• A specific photo with a specific written description is far more powerful than a general complaint
• Timestamping is automatic in Checka — always log issues in the app immediately when you find them
• Formal notifications to builders should be in writing (email), referencing your defects report
• For major or structural defects, your rights extend 6–10 years from completion, but you need to prove when issues were discovered
• State building authorities (QBCC, NSW Fair Trading, etc.) are there to help if your builder won’t act