A building inspection in Perth costs between $495 and $1,495 depending on the type of inspection, the size and location of the property, and its complexity. If you want the short answer, that is it. But understanding what drives that range, and what each type of inspection actually covers, will help you make sure you are comparing like for like and not underestimating what you need. This guide breaks down the real 2026 numbers for the most popular inspection types Bestwest Building offers.
| 2026 Building Inspection Costs in Perth: At a Glance |
| • Pre-purchase building inspection: $595–$895 (standard property) |
| • Combined building and pest inspection: $790–$1,090 (standard property) |
| • Construction stage inspections: $595–$895 depending on stage |
| • Practical completion inspection: $1,095–$1,495 |
| • Price varies by property size, location, and complexity |
| • Get an instant personalised quote at bestwestbuilding.com.au |
Pre-Purchase Building Inspection Cost Perth
A pre-purchase building inspection is one of the most common types of inspection in Perth, usually carried out after the contract is signed but before settlement. It covers all visible and accessible building elements of an established property: the structure, roof, walls, subfloor (if applicable), interior, wet areas, and more.
| Service | Price Range |
| Pre-purchase building inspection (standard property) | $595–$895 |
| Combined building and pest inspection (standard property) | $790–$1,090 |
The price varies depending on the size, location, and complexity of the property. A small unit in the inner suburbs will sit toward the lower end. A large two-storey home in an outer metro suburb or a property with a complex roof, multiple outbuildings, or difficult subfloor access will sit toward the higher end.
Is a Combined Building and Pest Inspection Worth It?
For most established properties in WA, yes. A combined building and pest inspection covers both the structural condition of the property and a timber pest inspection in a single visit. The price difference between a building-only and combined inspection is $245 at the lower end. Given the cost of treating or repairing termite damage, which can run into tens of thousands of dollars, the additional outlay is straightforward to justify. For any established property, particularly those with timber elements, a combined inspection is the recommended option.
Construction Stage Inspection Costs
Construction stage inspections are independent inspections conducted at key stages during the build of a new home. They are one of the most effective ways to ensure defects are identified and addressed while they are still accessible, before the next stage of construction covers them over.
Bestwest Building offers five construction stage inspections as part of a standard package, in the following order:
| Stage | What Is Checked | Price Range |
| 1. Slab inspection | Formwork, reinforcement placement, service penetrations, etc. | $595–$695 |
| 2. Brickwork / Framing inspection | Structure, lintels, flashings, wall ties, tie down placement, cavity insulation, room dimensions, etc. | $595–$695 |
| 3. Roof Frame inspection | Tie downs, rafters, ridgeboards, battens, collar ties, hanging beams, strutting beams, ceiling joists, etc. | $595–$695 |
| 4. Waterproofing & Roof Cover inspection | Waterproof membrane installation in bathrooms, roof covering, flashings, etc. | $495–$895 |
| 5. Practical Completion inspection | Final thorough overview of entire home and all accessible building elements inside and out. | $1,095–$1,495 |
Any significant defects identified at each stage should be addressed by the builder before major works continue. Some minor defects can be left until later in the building journey. The value of stage inspections is that defects caught early are almost always faster and cheaper for the builder to rectify than those discovered at the end of the build.
For full stage package pricing, contact Bestwest Building directly. Get an instant personalised quote at bestwestbuilding.com.au.
Practical Completion Inspection Cost
A practical completion inspection (PCI) is an independent inspection of a newly completed home at the end of the building contract, conducted before handover. It is for homeowners who have built under a building contract with a builder, not buyers of a new home.
The builder typically notifies you approximately two weeks before the proposed handover date. From that point, builders typically work off a 10 business day rectification window. Any defects identified in the practical completion inspection must be rectified by the builder at their own cost before handover. That rectification window is the key reason booking a PCI promptly matters.
| Service | Price Range |
| Practical completion inspection | $1,095–$1,495 |
The PCI is priced higher than a pre-purchase inspection because it is a more comprehensive assessment of a complete new home, including all fit-off items, fixtures, and building elements inside and out. It is not the same scope as a pre-purchase inspection and should never be compared on price alone.
What Affects the Price of a Building Inspection in Perth?
Three factors drive the price of any building inspection:
- Property size: larger homes take longer to inspect thoroughly. A four-bedroom two-bathroom home on a large lot will take significantly more time than a two-bedroom unit.
- Location: properties further from the inspector’s base area may attract a higher fee. Bestwest Building covers all Perth metro areas from Two Rocks to Falcon and into South West WA including Bunbury, Busselton, and Margaret River, with dedicated inspectors across the region.
- Complexity: two-storey homes, properties with difficult roof access, subfloor access limitations, multiple outbuildings, or unusual construction types require more time and expertise.
These factors apply across all inspection types. The ranges listed in this guide reflect standard properties in Bestwest Building’s usual operating area. For an exact figure for your specific property, use the 24/7 instant quote system at bestwestbuilding.com.au.
Why Cheaper Is Not Always Better
In WA, there is no mandatory licensing requirement for building inspectors. Anyone can call themselves a building inspector without formal qualifications or registration. This means price comparison between inspection companies is not straightforward: you are not always comparing the same thing.
Every inspector at Bestwest Building is a registered builder under WA building regulations. That is a meaningful distinction. Registered builders have completed rigorous training, hold current WA registration, and bring hands-on construction knowledge to every inspection. With 200+ years of combined building experience across our team and 45,000+ inspections completed across Perth and South West WA, the depth of knowledge behind each report is not replicated by a cheaper or unqualified alternative.
A building inspection is not a cost to minimise. It is information you are buying before one of the largest financial decisions of your life. The difference between a $400 inspection from an unqualified inspector and a $650 inspection from a registered builder is not $250. It is the difference between a thorough, defensible report and one that may miss what matters most.
What Is Included in the Price?
Every Bestwest Building inspection includes:
- A thorough inspection of all visible and accessible building elements
- A same-day digital report with full-resolution photographs for most domestic properties
- Direct consultation with your inspector on the findings
- AS4349.1 compliant methodology across all pre-purchase inspections
Bestwest Building also offers thermal imaging and drone-assisted roof inspections as additional capabilities for properties where these add value. Thermal imaging uses a specialised camera to detect heat variation behind walls and ceilings, revealing certain concealed defects not visible to the naked eye. Drone inspections allow safe assessment of roof areas that cannot be accessed on foot.
Get an accurate quote for your specific property.
Get a free instant quote at bestwestbuilding.com.au or call us on (08) 9444 9562.
Frequently Asked Questions About Building Inspection Costs in Perth
How much does a pre-purchase building inspection cost in Perth in 2026?
A pre-purchase building inspection costs $595–$895 for a standard property in Perth. A combined building and pest inspection, which includes a timber pest inspection in the same visit, costs $790–$1,090. Price varies depending on the size, location, and complexity of the property. Get an instant personalised quote at bestwestbuilding.com.au.
How much does a practical completion inspection cost?
A practical completion inspection costs $1,095–$1,495. This is a more comprehensive inspection than a pre-purchase inspection and covers a complete newly built home at the end of the building contract, before handover. It is not the same scope as a pre-purchase inspection and should be priced accordingly.
How much do construction stage inspections cost in Perth?
Construction stage inspections are priced at $595–$695 for the slab, brickwork/framing, and roof frame stages, and $495–$695 for the waterproofing and roof cover stage. The practical completion stage, which is the fifth and final stage inspection, is priced at $1,095–$1,495. Package pricing is available for the full set of five stages: contact Bestwest Building for details.
Why do building inspection prices vary so much in Perth?
Price varies based on the type of inspection, the size and location of the property, and its complexity. It also varies based on the qualifications of the inspector. In WA there is no mandatory licensing requirement for building inspectors, which means inspection companies range from unqualified operators at the lower end to fully registered builders at the higher end. The two are not comparable.
Is a combined building and pest inspection worth the extra cost?
For most established properties in WA, yes. The additional cost over a building-only inspection is $195 at the lower end. Termite damage can cost tens of thousands of dollars to treat and repair, and is not always visually obvious without a dedicated pest inspection. Combining both inspections in a single visit is the most comprehensive pre-purchase option available.
Do I need a building inspection if I am buying a new home?
If you have built under a building contract, a practical completion inspection before handover is strongly recommended. The builder’s 10 business day rectification window is your key opportunity to have defects identified and rectified at the builder’s cost. If you are purchasing a newly built home from a developer rather than building under contract, a pre-purchase building inspection applies.
Does Bestwest Building charge extra for same-day reports?
No. Same-day digital reports with full-resolution photographs are standard for most domestic properties at Bestwest Building. There is no additional charge for the report turnaround.
