Building and Pest Inspection Checklist for Investors

01Why This Is Usually the First Due Diligence Step

A building and pest inspection is typically one of the first, and most cost-effective, due diligence steps for any property purchase in Australia. Relative to the size of the transaction, the cost of an inspection is small, but the information it provides, on structural condition and pest activity, can materially change your view of a property's value or even your decision to proceed at all.

This checklist explains what a typical inspection covers and what to watch for. It's general education, not a substitute for an actual licensed inspector's report on the specific property you're considering.

02What a Building Inspection Typically Covers

A building inspection generally assesses the observable, accessible condition of the structure, including:

• Structural elements. Foundations, subfloor, walls, roof structure, and signs of movement, cracking, or subsidence.
• Roofing and guttering. Condition of roof coverings, flashing, guttering and downpipes, and evidence of leaks or water damage.
• Moisture and drainage. Signs of rising damp, poor drainage around the property, and water damage to walls, ceilings or floors.
• Doors, windows and general finishes. Functionality and condition, though minor cosmetic wear is typically noted separately from structural concerns.
• Safety hazards. Issues like unsafe balustrades, electrical hazards visible during inspection, or other safety-related defects.

Inspectors generally rate defects by severity and provide photographic evidence, giving you a structured basis for assessing whether identified issues are cosmetic, moderate, or significant enough to affect your decision.

03What a Pest Inspection Typically Covers

A pest inspection focuses specifically on evidence of pest activity and damage, most importantly termites, given the significant risk they pose to timber-framed Australian homes, but also other wood-boring insects and, in some cases, general pest presence. A pest inspector looks for:

• Active termite activity or damage. Including in timber framing, subfloor areas, and any accessible roof void.
• Conducive conditions. Things like timber in contact with soil, excess moisture, or garden beds against the house, which increase termite risk even without current evidence of an infestation.
• Evidence of past treatment. Whether the property has been previously treated for termites, and whether an ongoing treatment or monitoring system is in place.

Termite damage in particular can be extremely costly to remediate and, in serious cases, can affect the structural integrity of a building, so a clean pest report, or a clear understanding of any issues found, is genuinely important before committing to a purchase.

04When to Commission the Inspection

Timing depends heavily on how the property is being sold. For a private treaty sale with a cooling-off period, many buyers sign the contract and arrange inspections within the cooling-off window, using a negative finding as grounds to exercise their cooling-off rights if the period and process allow it, though the specifics of cooling-off vary by state and it's worth confirming with a solicitor before relying on this approach.

For an auction, this sequence generally isn't available. Most states don't provide a cooling-off period on a successful auction bid, so inspections, along with all other due diligence covered in our property due diligence guide, need to happen before auction day. This means budgeting for inspection costs on any property you're seriously considering bidding on, even knowing you might not end up buying it, since there's no opportunity to inspect afterward and walk away.

05Red Flags That Should Prompt Renegotiating or Walking Away

Not every defect found in an inspection is a deal-breaker, minor, cosmetic issues are common and expected in most properties. But certain findings are worth taking seriously as grounds to renegotiate price, request the seller address the issue, or walk away entirely:

• Active termite infestation, particularly if it has caused structural damage or affects load-bearing elements.
• Significant structural movement or cracking that suggests foundation issues, which can be expensive and complex to remediate.
• Major roof or waterproofing failures, especially in a strata property where such issues might affect common property and could trigger a special levy.
• Evidence of unresolved or extensive water damage, which can indicate ongoing problems rather than a one-off event.
• Safety hazards that would require significant remediation before the property could be safely tenanted or lived in.

When a serious issue is found, it's worth getting a quote for remediation before deciding how to proceed, a defect that sounds alarming in a report is sometimes a modest, bounded cost, while another that sounds minor can turn out to be expensive once properly scoped. Either way, having the actual numbers puts you in a stronger negotiating position, or gives you a clear-eyed basis for walking away.

06Choosing a Qualified Inspector

Not all inspectors are equal, and the value of an inspection depends heavily on the person carrying it out. Look for inspectors who are appropriately licensed or qualified for building and pest inspections in your state, carry professional indemnity insurance, and provide a detailed written report following the relevant Australian Standard for property inspections, rather than a brief verbal summary. It's reasonable to ask a prospective inspector about their qualifications, insurance, and what a sample report looks like before booking, and it's worth resisting the temptation to choose purely on price if it means compromising on thoroughness, given how much can ride on what the inspection does, or doesn't, catch.

07The Bottom Line

A building and pest inspection is a relatively low-cost, high-value step that should happen early in your due diligence process, before auction day if buying at auction, or within your cooling-off window if buying by private treaty. Understand what the report actually covers, take structural and termite findings seriously, and use significant findings as a genuine basis for renegotiation or walking away rather than talking yourself past them.