What Is a Building Inspection and Why Do You Need One?

Quick Answer

A building and pest inspection is an assessment of a property's physical condition carried out by a licensed inspector before you complete a purchase. The inspector checks for structural defects, safety hazards and evidence of pest activity — particularly termites. Getting one done before you exchange contracts is one of the most important steps you can take to protect yourself as a buyer.

What Does a Building Inspector Check?

A qualified building inspector examines the accessible areas of the property and prepares a written report. The inspection typically covers:

Structure and foundation: Cracks in walls, floors or ceilings; signs of movement or settlement; issues with load-bearing elements.

Roof: Condition of roofing material, gutters and downpipes; evidence of water penetration; condition of eaves and fascia boards.

Exterior: Condition of external walls, windows, doors, verandas and balconies; drainage and stormwater management.

Interior: Condition of internal walls, floors, ceilings and fixtures; evidence of water damage or rising damp; doors and windows that do not open or close properly.

Subfloor (if accessible): Evidence of moisture, rot, termite activity or structural issues beneath the floor.

Electrical and plumbing: Visual inspection only — inspectors are not licensed electricians or plumbers, so they flag visible concerns without testing systems.

The inspector will note defects as major (affecting safety or structural integrity) or minor (maintenance issues). They will also note whether specific areas were inaccessible at the time of inspection.

What Does a Pest Inspection Check?

The pest component of the inspection focuses on timber pest activity, primarily termites. Termites cause billions of dollars in damage to Australian homes each year, often without obvious visible signs until significant structural damage has occurred.

A pest inspector will check for:

• Live termite activity or evidence of past activity
• Termite mud leads and workings
• Wood rot, fungal decay and wood-boring insects
• Conditions conducive to pest activity (moisture, wood-to-ground contact, vegetation against the structure)

Pest inspectors use moisture metres, thermal imaging and physical probing to detect activity in wall cavities and subfloors that are not otherwise visible.

When Should You Get an Inspection?

For private treaty sales, you typically include a building and pest inspection condition in your offer. This gives you a set number of days (usually 5–7 business days) to arrange the inspection and review the report. If serious issues are found, you can negotiate a price reduction, request the vendor repair defects before settlement, or in some cases withdraw from the contract.

For auction purchases, there is no cooling-off period and no conditions — which means you must arrange and pay for an inspection before auction day. This carries financial risk if you do not ultimately buy the property, but it is the only way to know what you are bidding on.

Some vendors in high-demand markets commission a "vendor inspection report" before listing. Treat these with appropriate scepticism — the inspector was engaged by the vendor, not you. If you are serious about a property, commission your own independent report.

How Much Does It Cost?

Building and pest inspections typically cost between $400 and $800 for a standard residential property, depending on property size, location and the inspector used. Larger properties, properties with complex structures, or those in remote areas may cost more.

This cost is modest relative to the potential downside. A structural issue or active termite infestation can cost tens of thousands of dollars to remediate. An inspection that prevents you from buying a problem property, or helps you negotiate a lower price, easily pays for itself.

What Happens If the Report Finds Issues?

A report almost always finds something. The question is whether the issues are significant or routine.

Minor issues — cracked render, worn weatherboards, a stiff door — are normal in any older property. Major issues — active termites, significant structural movement, water damage through the roof — are grounds for serious action.

If your inspection condition is still active, you can:

1. Negotiate a price reduction to reflect the cost of remediation
2. Request the vendor complete repairs before settlement
3. Withdraw from the contract within the inspection condition period

If you proceed with a purchase after discovering significant defects, you do so with full knowledge. That is your prerogative — but make sure the price reflects the property's actual condition.

Realistic Example

Dan is buying a 1960s brick veneer house in Canberra. He includes a 7-day building and pest inspection condition in his offer at $740,000.

His inspector finds evidence of past termite activity in the subfloor, a cracked lintel above a window and moisture penetration through the rear wall where vegetation has grown against the brickwork. The report grades the termite history as a major defect.

Dan's conveyancer advises him to request a $25,000 price reduction to cover a chemical soil treatment, subfloor repairs and rectification of the rear wall. The vendor accepts $720,000 and Dan proceeds. The $550 he spent on the inspection saved him from buying an unknown problem — and secured him a $20,000 net saving after the inspection cost.

Checklist: Getting a Building and Pest Inspection

• Engage a licensed building inspector who is independent of the selling agent or vendor
• Check the inspector holds current professional indemnity insurance
• Request a combined building and pest inspection rather than separate reports where possible
• Book promptly once your inspection condition window opens
• Attend the inspection if you can — inspectors will walk you through key findings on the day
• Read the full report carefully, not just the summary
• Get quotes on any major defects from qualified tradespeople before deciding how to proceed
• If buying at auction, commission the inspection before the auction day

Key Takeaways

• A building and pest inspection checks for structural defects, safety hazards and timber pest activity
• It should be completed before you exchange contracts or before bidding at auction
• Minor issues are normal; major defects give grounds to negotiate price or withdraw
• The cost ($400–$800) is small relative to the risk of buying a problem property
• Always use an independent inspector — do not rely solely on a vendor-commissioned report

FAQ

Do I need a separate building inspection and pest inspection? Many inspectors offer combined reports. This is generally the most cost-effective approach and ensures both components are assessed in a single visit. Confirm what is included when booking.

What if the inspector cannot access part of the property? The report will note inaccessible areas. If critical spaces — like the subfloor or roof cavity — could not be inspected, consider whether you are comfortable buying with that uncertainty, or whether you can arrange access before proceeding.

Can I use the inspection report to renegotiate after exchange? Only if your contract includes a building inspection condition that is still active. Once a contract is unconditional, you generally cannot use an inspection report to renegotiate or withdraw. This is why the condition must be in place before exchange.

What qualifications should a building inspector have? Inspectors should hold a current licence to inspect residential buildings in your state (requirements vary by state) and carry professional indemnity insurance. Members of the Master Builders Association or similar industry bodies can also be a useful indicator of professionalism.

Run a Free Property Analysis on Marketli

Before you commission an inspection, use Marketli to research the suburb and understand whether the property is priced fairly for its condition and location. Good preparation before the inspection makes the findings easier to act on.