Building & Pest Inspections in Sydney (2026)

The short answer

For an established Sydney property you should commission both a building inspection and a pest (timber-pest) inspection before exchange — combined cost typically $550 to $900. Order it the moment you have serious interest in a property, ideally during the public open campaign rather than after acceptance. If the property is going to auction, you need the report before auction day, because auction contracts in NSW have no cooling-off period.

What a building inspection covers

A building inspection in NSW is a visual, non-invasive assessment of the readily accessible parts of the property by a qualified inspector. Done to Australian Standard AS 4349.1, it covers the following categories. Anything outside readily accessible scope (under floor coverings, inside wall cavities, beneath landscaping) is normally excluded and the report will say so explicitly.

• Major structural defects — cracking, foundation movement, roof framing, load-bearing walls
• Roof condition — covering, flashings, gutters, downpipes, eaves, ceiling void
• Wet areas — bathrooms, kitchen, laundry, signs of historical or active water damage
• Exterior — render, brickwork, timber cladding, paint condition, drainage at the property
• Subfloor — bearers, joists, ventilation, moisture, where access is available
• Outbuildings, retaining walls, decks and balconies — usually photographed and described
• Compliance flags — obvious unapproved work, missing pool barriers, asbestos likely

What a pest (timber-pest) inspection covers

A pest inspection is a separate report (sometimes by the same inspector) covering timber pests as defined in Australian Standard AS 4349.3. The headline issue in Sydney is termites — particularly in suburbs with bushland edges, established gardens with mulched beds against the house, or properties built between the 1950s and 1990s before treated pine framing became standard. The report covers: active termite activity, termite damage from prior infestations, conditions conducive to termite attack (moisture, timber-to-ground contact, inadequate ventilation), borers, and timber decay. Treatment costs vary widely — a small spot treatment may be $400 to $1,200, while a full perimeter chemical or baiting system can run $2,500 to $5,000 and ongoing.

What it costs in Sydney

Sydney inspectors quote in a few ways. The combined building + pest is the most common and the best value.

• Combined building + pest: $450 to $800 for a standard suburban house or townhouse
• Building only: $350 to $550
• Pest only: $200 to $350
• Strata building report (for apartments): $300 to $550 — usually called a strata inspection report and covers the strata roll, books and capital works fund rather than the physical structure
• Specialist add-ons: thermal imaging ($150 to $300), moisture meter survey ($100 to $200), drone roof inspection ($150 to $400)

When to order it

Timing is the single most expensive thing buyers get wrong. The right time to order is the moment you have serious interest, not after you have agreed terms. Why: a competing buyer's inspector may be quicker, you need time to read and digest the report, and any issues need time to discuss with the agent and (for auction) decide whether to bid at all. For a private-treaty purchase with a five business-day cooling-off period, you can order during cooling-off — but most experienced buyers commission before signing to avoid using cooling-off as a finance contingency. For an auction purchase, the inspection must be done before auction day because there is no cooling-off period — the report tells you whether to register to bid at all, and how high.

How to read the report

A standard Sydney building report runs 15 to 40 pages with photographs. It is not a pass/fail document — almost every report flags something. Read for severity, not for the count of flagged items. The four severity categories you should see clearly:

• Major defect — structural or safety. Treat as a deal-breaker until you have a written quote from a builder or structural engineer. Common examples: serious foundation movement, unsafe deck, active termite damage to structural timber, roof framing failure.
• Significant condition — costly to repair but not safety-critical. Renegotiate the price or budget for the fix. Examples: roof at end of life, full bathroom waterproofing failure, render delamination across a major wall.
• Minor defect — maintenance item, expected on a 30-year-old house. Note and move on. Examples: chipped paint, loose tile, gutter clean, replace a few palings.
• Item for further investigation — the inspector cannot determine the issue without invasive work. Get a specialist quote before exchange if the implied cost is material.

Strata buildings — the report you actually need

For a Sydney apartment purchase, the physical building inspection is less useful than the strata inspection report, also called a strata records search or strata inspection. This report covers the strata roll, recent owners corporation meeting minutes, the capital works fund balance, current and recent special levies, any litigation involving the owners corporation, insurance currency, and any building defect rectification correspondence — particularly under the Design and Building Practitioners Act 2020 (NSW). The capital works fund balance is the single most predictive line item: a thin fund in an older building is a forward indicator of special levies. Cost: $300 to $550.

How to choose an inspector

A good inspector saves you many multiples of their fee. A bad one creates either false confidence or false alarm. Look for:

• Licensed building inspector — in NSW, this means a current Home Building Licence (Building Consultant category) or a registered Builder qualified to inspect; verify on NSW Fair Trading's licence-check tool
• Professional indemnity insurance — at least $1 million cover, confirmed in writing
• Report compliant with AS 4349.1 (building) and AS 4349.3 (timber pest)
• Sample reports available before you commit so you can see the format
• Independence — the inspector should not also be the seller's agent's recommended provider, or a builder pitching you for the repairs
• Member of a professional body such as the Master Builders Association or Housing Industry Association is a useful but not decisive signal

How this fits with your other professionals

The inspector sits alongside your conveyancer, mortgage broker and (for buyers in competitive markets) buyers agent. Your conveyancer reviews the contract and the section 10.7 planning certificate; the inspector reviews the physical property. The two reports together tell you whether to exchange. Your mortgage broker may also commission a valuation that flags major defects — but the lender's valuation is for the bank's risk, not yours, and is no substitute for an independent inspection.

FAQ

Frequently asked questions