If you are buying an established property in Perth, a pre-purchase building inspection is one of the most important steps you will take in the purchasing journey. It tells you exactly what you are buying: not the polished version presented at the home open, but the real structural and physical condition of the property. This guide explains what a pre-purchase building inspection covers, what it costs in 2026, who should be conducting it, and how to book one with Bestwest Building’s extensive team of highly experienced registered builders.
| Perth Pre-Purchase Inspection: At a Glance |
| • Independent structural and condition assessment of an established property before purchase |
| • Covers all visible and accessible building elements, inside and out |
| • Conducted in accordance with AS4349.1, the relevant Australian Standard for pre-purchase inspections |
| • All Bestwest Building inspectors are registered builders |
| • Same-day digital report with full-resolution photographs for most domestic properties |
| • Cost: $595–$895 for a standard property |
| • Get an instant personalised quote at bestwestbuilding.com.au |
What Is a Pre-Purchase Building Inspection?
A pre-purchase building inspection is an independent assessment of the structural condition and general state of a property, usually carried out after you sign the contract. It is not a council valuation, a bank assessment, or a pest inspection. It is a detailed, methodical inspection of the building itself: all visible and reasonably accessible building element, from the roof and subfloor (if applicable) to the walls, doors, windows, and beyond.
Inspections at Bestwest Building are conducted in accordance with AS4349.1, the Australian Standard that sets the scope and methodology for pre-purchase property inspections. The result is a same-day digital report with full-resolution photographs, giving you a clear picture of the property’s condition before you are locked in.
Why Registered Builders Make Better Inspectors
In Western Australia, there is no mandatory licensing requirement for building inspectors. That means anyone can call themselves a building inspector without any formal qualifications. This is a significant risk for buyers who assume all inspectors are equally qualified.
Every inspector at Bestwest Building is a registered builder. That is a meaningful distinction. All registered builders at Bestwest Building have completed rigorous long term training, hold current WA registration and have hands-on construction experience. They do not just identify that something looks wrong. They understand why it is wrong, what caused it, and what it will take to fix it. With 200+ years of combined building experience across the team and 45,000+ inspections completed across Perth and South West WA, Bestwest Building brings a depth of knowledge that goes well beyond what a non-qualified inspector can offer.
What Does a Pre-Purchase Building Inspection Cover?
Our premium pre-purchase building inspection covers all visible and accessible building elements at the time of inspection. This includes:
Exterior
- Roof covering, flashings, gutters, and downpipes
- External walls: brickwork, render, cladding, and pointing
- Windows and doors: frames, operation, and condition
- Eaves, fascias, and bargeboards
- Garage, carport, verandahs, and outbuildings
- Driveway, paths, and site drainage
- Fencing and retaining walls where applicable
Interior
- Internal walls, ceilings, and floors for movement, cracking, or damage
- Doors and windows: operation, frames, and condition
- Wet areas: bathrooms, ensuite, and laundry for water damage and condition
- Kitchen and living areas
- Staircase and balustrades where present
Roof Space
- Roof framing: rafters, purlins, collar ties, and bracing
- Insulation installation throughout roof void
- Signs of water ingress or structural movement
Subfloor (where accessible)
- Stumps, bearers, and joists
- Moisture, drainage, and ventilation
- Signs of pest activity or structural concern
The inspection covers what is visually and reasonably accessible on the day. It does not cover items that are concealed behind finished surfaces, as these cannot be assessed without invasive access.
Thermal Imaging and Drone Inspections
Bestwest Building offers two inspection capabilities that most competitors do not: thermal imaging and drone-assisted roof inspections.
Thermal imaging uses a specialised camera to detect heat variation behind walls and ceilings, which can reveal certain concealed defects not visible to the naked eye. Note that thermal imaging typically does not detect moisture in brick walls. Where there is visual evidence of damp, such as efflorescence, bubbling paint, or tide marks at skirting level, moisture meters are used to assess moisture content in walls.
Drone inspections allow our inspectors to safely access and assess roof areas that cannot be reached on foot. This is particularly valuable for steeply pitched roofs, two-storey homes, or properties where safe ladder access is not possible. A drone inspection means nothing gets missed because it was out of reach.
How Much Does a Pre-Purchase Building Inspection Cost in Perth?
The cost of a pre-purchase building inspection in Perth varies depending on the size, location and complexity of the property. For 2026, Bestwest Building’s pricing for standard properties in our usual operating area is:
| Service | Price Range |
| Pre-purchase building inspection | $595–$895 |
| Combined building and timber pest inspection | $790–$1,090 |
Get an instant personalised quote at bestwestbuilding.com.au.
Is It Worth Combining with a Timber Pest Inspection?
For most established properties in WA, yes. A combined building and timber pest inspection is conducted in a single visit, covering both the structural and physical condition of the property and a timber pest inspection. It is the most comprehensive pre-purchase option available, and combining the two services avoids the need to coordinate two separate inspections and appointment times. Termites can cause serious structural damage that is not always immediately visible, making a timber pest inspection a sound investment alongside any building inspection.
When Should You Book?
The ideal time to book a pre-purchase building inspection is as soon as your offer has been accepted, and before you proceed to unconditional sale. Most standard contracts of sale in WA include a building inspection condition, which gives you a set number of days to complete the inspection and negotiate on any findings. Do not let this window close before you have your report.
If you are buying at auction or in a competitive market where conditions are being waived, aim to complete the inspection before the auction or before submitting an unconditional offer. Bestwest Building offers a 24/7 instant online quote system and can generally schedule inspections promptly across all Perth metro areas and the South West, including Bunbury, Busselton, and Margaret River.
What Happens After the Inspection?
You receive a same-day digital report with full-resolution photographs. The report outlines all defects and conditions observed, categorised by significance. Your Bestwest Building inspector is available for direct consultation on the findings, so you understand exactly what the report means and what your options are.
Common outcomes after a pre-purchase building inspection include:
- Proceeding with the purchase, with full knowledge of the property’s condition
- Negotiating a price reduction based on the cost of identified defects
- Requesting the seller rectify specific items before settlement
- Deciding not to proceed, having avoided a costly purchase
The inspection gives you information. What you do with it is your decision, and Bestwest Building’s role is to make sure that decision is based on accurate, professional assessment, not guesswork.
Coverage: Where Bestwest Building Inspects
Bestwest Building covers all Perth metro corridors and South West WA, including Bunbury, Busselton, and Margaret River. With dedicated inspectors regularly operating from Two Rocks all the way down to Falcon, covering high-growth suburbs including Eglinton, Baldivis, Byford, Piara Waters, Wellard, and Hammond Park. Our South West region, including Busselton, Dunsborough and Margaret River, is serviced by a dedicated inspector based in the area. Whether you are buying in the inner suburbs or the expanding outer metro, Bestwest Building has the coverage and local knowledge to help.
Ready to book your pre-purchase building inspection?
Get a free instant quote at bestwestbuilding.com.au or call us on (08) 9444 9562.
Frequently Asked Questions About Pre-Purchase Building Inspections in Perth
How long does a pre-purchase building inspection take?
Most standard Perth properties take between 1.5 and 2.5 hours, depending on size and complexity. Larger homes, two-storey properties, or those with multiple outbuildings will take longer.
Do I need to be present at the inspection?
You are not required to be present during the inspection. It is usually not appropriate for the purchaser to be present at the home with the seller, without the real estate agent there. If you do want to be present, please ensure you get approval from the real estate agent prior to attending. Regardless, your same-day digital report with full-resolution photographs will give you a comprehensive record of the findings and we are available to discuss the report with you.
What is the difference between a pre-purchase building inspection and a combined building and pest inspection?
A pre-purchase building inspection covers the structural and physical condition of the property. A combined building and pest inspection adds a timber pest assessment in the same visit, checking for termites and other timber pests. For most established properties in WA, the combined inspection is the recommended option.
Can a building inspection reveal everything wrong with a property?
A pre-purchase building inspection covers all visible and reasonably accessible elements on the day of inspection. It does not cover items concealed behind finished surfaces, as these cannot be assessed without invasive access. The inspector will note areas that could not be accessed and flag any visible signs that suggest further investigation may be warranted.
Are Bestwest Building inspectors licensed?
All Bestwest Building inspectors are registered builders under WA building regulations. This is a more rigorous qualification than being a general building inspector. In WA there is no mandatory licensing requirement for building inspectors, which means not all inspection companies employ qualified tradespeople. Bestwest Building’s team of registered builders brings professional construction knowledge to every inspection.
How quickly will I receive my report?
For most standard domestic properties, reports are delivered the same day as the inspection, as a digital document with full-resolution photographs. The inspector is also available for direct consultation on the findings.
What areas does Bestwest Building cover?
Bestwest Building covers all Perth metro areas, regularly travelling from Two Rocks down to Falcon and into the South West WA, including Bunbury, Busselton, and Margaret River. A dedicated inspector now operates in the south corridor, covering the growing suburbs of Baldivis, Byford, Piara Waters, Wellard, and Hammond Park.
How much does a pre-purchase building inspection cost in Perth?
Pre-purchase building inspections at Bestwest Building are priced at $595–$895 for a standard property. A combined building and pest inspection is $790–$1,090. Get an instant personalised quote at bestwestbuilding.com.au.
