What Is a Building & Pest Inspection?
Think of it as a full health check for a property – done by a professional before you commit to buying. It tells you exactly what condition the home is in, and whether any nasty surprises are hiding behind the walls.
In Australia, a Building Inspection and a Pest Inspection are technically two separate reports – but they are almost always ordered together as a bundle. The inspector physically visits the home (usually 1.5 to 3 hours) and examines everything they can safely access.
Covers physical structure and condition – from roof to foundation. Conducted under AS 4349.1-2007.
Detects live and past timber pest infestations – termites, borers, wood decay fungi. Conducted under AS 4349.3-2010.
The most common format. Always order this – never one without the other.
Why You Cannot Skip This
Australian property is sold under caveat emptor – “buyer beware” – placing responsibility on the buyer to investigate physical condition before committing. Vendor disclosure regimes cover legal and title matters – NOT the physical condition of the building. Your due diligence on defects remains entirely yours.
Termite repair costs: $7,000 to $100,000+ in severe cases. A $600 inspection is the cheapest insurance you'll buy.
A bad report gives you hard evidence to renegotiate price or request repairs before settlement.
In most states, a subject-to-inspection clause lets you pull out if the report reveals major issues.
Auction buyers: Always arrange a pre-auction inspection before bidding. You cannot insert a clause after auction.
The Australian Standards That Govern Inspections
Two specific Australian Standards govern how inspections must be conducted. A quality report will reference both explicitly.
Pre-purchase Building Inspections – Residential Buildings. Sets minimum requirements. Inspections are visual and non-invasive – no cutting walls or lifting carpets.
Timber Pest Inspections. Covers termites, borers, wood decay fungi. Does NOT cover drywood termites, mould, or rodents – these require separate specialist inspections.
Before booking: Ask “Will my report comply with AS 4349.1 and AS 4349.3?” – and confirm they hold public liability and professional indemnity insurance.
What the Inspector Actually Looks At
Click each section to expand the detail.
Understanding Severity Ratings
Every defect in your report will carry one of these ratings. Understanding them is the difference between panic and informed decisions.
Key insight: Almost every property will have minor and moderate defects. What matters is whether there are any major or critical findings.
The Inspection Process – Step by Step
Verify appropriate licence for your state (see Chapter 7), confirm AS 4349.1 and AS 4349.3 compliance, and check both public liability and professional indemnity insurance.
Arrange once you have an accepted offer – or before auction if bidding. AS 4349.1 and AS 4349.3 require a pre-inspection agreement to be signed before commencement.
Strongly recommended. The inspector's verbal walkthrough in real time is more valuable than reading a 60-page PDF alone.
Most inspectors deliver within 24 hours. Read it in full – do not just skim the summary. The detail is in the body.
Ask: 'What concerned you most?' and 'Is there anything here you'd walk away over?' Their verbal opinion often gives more clarity than the written report.
Proceed, renegotiate with quotes from tradespeople, or exercise your subject-to-inspection clause and walk away.
Inspector Licensing – Varies by State
Building inspector regulation is NOT consistent across Australia. Knowing the difference protects you.
Only state requiring a licensed builder with a specific Completed Residential Building Inspection licence. Verify on the QBCC public register.
Must be registered with the VBA under the Building Act 1993. Verify on the VBA public register.
Must be registered with the WA Building Commission.
Building inspectors must be licensed and typically hold a Diploma in Building Inspection.
Pre-purchase building inspection is not strictly licensed. Look for industry association membership and insurance.
Building inspection is not licensed in these jurisdictions. Look for professional body membership (AIBS) and insurance.
Regardless of state: Always verify current professional indemnity insurance and public liability insurance. This is your only recourse if they miss a major defect. Get policy details in writing before booking.
What Does It Cost?
Context check: On a $900,000 property, a $650 inspection is 0.07% of the purchase price. The cheapest due diligence you'll ever do.
The Big Red Flags
These findings should stop you in your tracks. Get specialist advice before proceeding.
Live termites present. Repair costs: $7,000 to $100,000+ in severe cases.
Wide or diagonal cracks in walls – indicates foundation movement.
Full replacement recommended. Budget $15,000–$50,000 depending on roof type.
Multiple areas affected – walls, ceilings, subfloor. Long-term leak history.
Old wiring with no safety switches. Rewiring: $8,000–$20,000.
Especially friable asbestos. Licensed removal is expensive.
Failed or absent damp course. Affects wall integrity and indoor air quality.
Extensions, garages, pergolas built without council approval.
Using the Report to Negotiate
Get two or three real quotes from licensed tradespeople before negotiations. Present actual numbers, not estimates.
Do not negotiate every minor item – pick the top two or three significant issues and anchor there.
A price reduction is cleaner than asking the vendor to do repairs. You control the quality of work done after settlement.
If major issues are structural, pest-related, or environmental and the vendor won't move – there is always another property.
Frequently Asked Questions
A building and pest inspection is not a cost – it is the price of certainty. Never exchange contracts without one – done to AS 4349.1 and AS 4349.3, by an inspector with insurance.