When you are buying an established property in Perth, one of the first decisions you will face after signing the contract is what type of inspection to book. A building inspection? A pest inspection? Both? The short answer for most WA buyers is both, and ideally in a single combined visit. But understanding why requires knowing what each inspection actually covers, where the gaps are, and what the real cost of skipping one looks like. This guide lays it out clearly.
| Building vs Pest Inspection in WA: At a Glance |
| • A building inspection covers the structural and physical condition of the property |
| • A pest inspection covers timber-destroying organisms, primarily termites |
| • Neither inspection covers what the other does: they are complementary, not interchangeable |
| • A combined building and pest inspection is conducted in a single visit |
| • For most established properties in WA, the combined option is the recommended choice |
| • Termite damage can cost tens of thousands of dollars and is not always visually obvious |
| • Combined building and pest inspection: $790–$1,090 for standard properties |
| • Get an instant personalised quote at bestwestbuilding.com.au |
What Does a Building Inspection Cover?
A pre-purchase building inspection is an independent assessment of the structural and physical condition of a property, usually carried out after the contract is signed but before settlement. A comprehensive inspection covers all visible and accessible building elements, including:
- Roof covering, flashings, gutters, and downpipes
- External walls, brickwork, render, and cladding
- Windows, doors, frames, and seals
- Internal walls, ceilings, and floors
- Wet areas: bathrooms, ensuite, and laundry
- Roof space and subfloor where accessible
- Garage, carport, verandahs, and outbuildings
A building inspection does not include an assessment of timber pests. An inspector may note visible timber damage or conditions conducive to pest activity, but this is not the same as a dedicated timber pest inspection conducted under the relevant Australian Standard.
What Does a Pest Inspection Cover?
A timber pest inspection is a dedicated assessment for timber-destroying organisms, primarily termites (white ants), but also wood borers, fungal decay, and other conditions that affect the structural integrity of timber elements in a home.
The inspector checks all visibly accessible areas of the property for:
- Live termite activity or evidence of past termite workings
- Termite damage to structural and non-structural timber
- Conditions conducive to termite attack: moisture, timber-to-ground contact, debris
- Wood borer activity and fungal decay where present
- An assessment of the overall pest risk profile of the property
A pest inspection does not assess the structural or physical condition of the building. It is focused specifically on timber pests and the conditions that attract them.
How Do They Compare?
| Building Inspection | Pest Inspection | Combined | |
| Structural defects | ✔ | ✘ | ✔ |
| Roof, walls, subfloor | ✔ | ✘ | ✔ |
| Wet areas | ✔ | ✘ | ✔ |
| Fixtures and fit-off | ✔ | ✘ | ✔ |
| Live termite activity | ✘ | ✔ | ✔ |
| Termite damage to timber | ✘ | ✔ | ✔ |
| Timber pest risk assessment | ✘ | ✔ | ✔ |
| Same-day digital report | ✔ | ✔ | ✔ |
| Single site visit | ✔ | ✔ | ✔ (one visit) |
Why Most Perth Buyers Choose the Combined Option
Termites are active across Perth and South West WA. They are not limited to older homes, heavily wooded areas, or properties with visible timber. Modern brick homes with timber roof frames, floor joists, skirting boards, and built-in cabinetry are all susceptible. And because termites typically work from the inside out, by the time damage is visible it is often already extensive.
A building inspection will not find termite activity that is not visually apparent. An inspector checking the physical condition of a property is not conducting a timber pest assessment. The two disciplines are distinct, and relying on a building inspection alone to catch pest issues is a risk that is not worth taking on a purchase of this size.
The combined building and pest inspection addresses this directly. Both assessments are conducted in a single site visit by Bestwest Building’s extensive team of highly experienced registered builders, producing a same-day digital report with full-resolution photographs covering both the physical and pest condition of the property.
What Does a Combined Inspection Cost in Perth?
A combined building and pest inspection at Bestwest Building is priced at $790–$1,090 for standard properties in our usual operating area. A building-only pre-purchase inspection is $595–$895.
The price difference between a building-only and a combined inspection reflects the additional scope of the timber pest assessment. Given that termite treatment and structural timber repair can run into tens of thousands of dollars, the additional cost of including a pest inspection at the time of purchase is one of the more straightforward value decisions a buyer can make.
Price varies depending on the size, location, and complexity of the property. Get an instant personalised quote at bestwestbuilding.com.au.
Are There Any Situations Where a Building-Only Inspection Is Appropriate?
There are some situations where a buyer may reasonably choose a building-only inspection. A strata title property such as a high-rise apartment or unit, where the building exterior and common areas are managed by the strata company, may present a lower individual pest risk. Brand new properties may also be considered lower risk, though this is not a guarantee.
For the majority of established houses and townhouses in Perth, particularly those with any timber elements, a combined inspection is the more complete and prudent option. If in doubt, Bestwest Building’s team can advise on the most appropriate inspection type for the specific property at the time of quoting.
What About Thermal Imaging?
Bestwest Building also offers thermal imaging inspections as an additional capability. 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. It is worth noting that thermal imaging 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 separately.
Thermal imaging can be added to either a building inspection or a combined inspection where it adds value for the specific property.
Not sure which inspection is right for your property?
Get a free instant quote at bestwestbuilding.com.au or call us on (08) 9444 9562.
Frequently Asked Questions About Building and Pest Inspections in Perth
Do I need both a building inspection and a pest inspection in WA?
For most established properties in Perth and South West WA, yes. A building inspection covers the structural and physical condition of the property, while a pest inspection covers timber-destroying organisms including termites. Neither covers what the other does. A combined building and pest inspection conducted in a single visit is the most comprehensive pre-purchase option available.
What is the difference between a building inspection and a pest inspection?
A building inspection assesses the structural and physical condition of a property: the roof, walls, subfloor, wet areas, windows, doors, and all visible building elements. A pest inspection assesses timber-destroying organisms, primarily termites, including live activity, past workings, timber damage, and conditions conducive to attack. They are separate disciplines covering different risks.
Can a building inspector identify termites?
A building inspector may note visible timber damage or conditions that could attract pests, but this is not the same as a dedicated timber pest inspection. A timber pest inspection is conducted under a separate Australian Standard with specific methodology for identifying pest activity. Do not rely on a building inspection alone to identify termite risk.
How much does a combined building and pest inspection cost in Perth?
A combined building and pest inspection at Bestwest Building is priced at $790–$1,090 for standard properties in our usual operating area. A building-only inspection is $595–$895. Price varies depending on the size, location, and complexity of the property. Get an instant personalised quote at bestwestbuilding.com.au.
Are termites common in Perth?
Yes. Termites are active across Perth and South West WA, including in suburban areas. They are not limited to older homes or properties near bush. Modern homes with timber roof frames, joists, skirting boards, and cabinetry are all susceptible. Because termites typically work from the inside out, damage is often extensive before it becomes visually apparent, making a dedicated pest inspection an essential part of any pre-purchase process.
What does a combined building and pest inspection include?
A combined building and pest inspection at Bestwest Building covers all visible and accessible structural and physical building elements, plus a dedicated timber pest assessment including checks for live termite activity, past workings, timber damage, wood borer activity, fungal decay, and conditions conducive to pest attack. Both assessments are conducted in a single visit, with a same-day digital report with full-resolution photographs.
How long does a combined building and pest inspection take?
Most standard Perth properties take between 1.5 and 3 hours for a combined inspection, depending on size and complexity. Larger homes or those with extensive subfloor or roof space access requirements will take longer. The combined inspection is conducted in a single visit, avoiding the need to coordinate two separate appointments.
