Buying a home in Perth involves more than checking the kitchen, bedrooms and backyard at an open home. A property can present well while still having building defects, moisture concerns, roof issues or timber pest evidence that are difficult for a buyer to identify during a short viewing.
So, what does a building inspection cover in Perth?
A pre-purchase building inspection generally assesses the accessible interior, exterior, roof space, roof exterior, subfloor, wet areas, structural elements and relevant site conditions within the agreed inspection scope. If you choose a combined building and pest inspection, it can also include an assessment for termites and other timber pest evidence.
This buyer’s checklist explains what may be inspected, what an inspection cannot reasonably cover, and what Perth buyers should understand before booking.
What Does a Building Inspector Check?
The exact scope depends on the property, accessibility and inspection package. However, a comprehensive pre-purchase building inspection in Perth may assess the following areas:
| Area | What the Inspector May Check |
| Interior | Walls, ceilings, floors, doors, windows, cracking and visible deterioration |
| Wet Areas | Bathrooms, showers, laundry and moisture-related observations |
| Structural Elements | Visible cracking, movement, deformation and deterioration |
| Roof Space | Accessible framing, staining, deterioration and visible defects |
| Roof Exterior | Roof covering, flashings, gutters and downpipes where safely accessible |
| Exterior | External walls, cracking, finishes and deterioration |
| Subfloor | Accessible supports, timber elements, moisture indicators and deterioration |
| Site & Drainage | Surface drainage, downpipes, ground conditions around the building |
| Timber Pest | Termite activity, timber damage and conducive conditions when included |
The purpose isn’t simply to produce a long list of cosmetic imperfections. A useful inspection should help you understand significant accessible findings that may matter to your property decision.
You can see StructSure’s available inspection scopes and packages on our Pre-Purchase Building Inspections Perth page.
1. Internal Walls, Ceilings and Floors
The interior is one of the first major areas assessed during a building inspection.
The inspector may look at accessible:
- Walls and ceilings
- Floors
- Doors and windows
- Skirtings and trims
- Visible cracking
- Water staining
- Deteriorated finishes
- Signs of movement or deformation
Cracking deserves context.
A small crack doesn’t automatically mean a home has a major structural problem, while a larger or unusual crack shouldn’t be judged solely by its width.
Location, direction, pattern, surrounding building elements and other visible evidence all matter.
For a deeper explanation, read our guide to Structural Faults in Perth Homes.
We’ve also covered the common buyer question: Is a 5mm Wall Crack a Major Structural Defect in a Perth House?
2. Bathrooms, Showers and Wet Areas
A recently renovated bathroom can look excellent during an open home.
That doesn’t necessarily tell you everything about its condition.
A building inspection may assess accessible wet areas for observations such as:
- Visible water staining
- Deteriorated sealants
- Damaged finishes
- Cracking
- Moisture-related deterioration
- Other signs that warrant closer assessment
Laundry areas and other relevant wet areas may also be included.
With StructSure’s Premium Building + Pest package, thermal imaging and moisture assessment can be used where appropriate as additional inspection tools.
For example, thermal imaging may identify a temperature anomaly around a shower area. Moisture readings and visual evidence can then provide additional context.
Thermal imaging does not see through walls. It identifies thermal patterns that may warrant further investigation and should be interpreted alongside other inspection evidence.
3. Accessible Structural Elements
Structural observations are an important part of a building inspection in Perth.
Depending on what is accessible, an inspector may assess visible elements for:
- Cracking
- Movement indicators
- Deformation
- Deflection
- Deterioration
- Damage
- Other observations requiring further assessment
The important part isn’t simply identifying that something looks unusual.
It is considering the observation in the context of the building.
StructSure takes an engineer-led inspection approach, combining building inspection experience with civil engineering knowledge.
You can learn more about the people conducting StructSure inspections on our Our Team page.
4. Roof Space
Where it can be safely and reasonably accessed, the roof space can provide valuable information that isn’t obvious from inside the rooms below.
An inspector may assess visible:
- Roof framing
- Connections
- Timber deterioration
- Water staining
- Evidence of previous water entry
- Damaged elements
- Other accessible roof-space concerns
For example, a ceiling may have been repainted while evidence of previous moisture entry remains visible elsewhere in the roof space.
However, roof-space inspection has limitations.
Insulation, low clearances, stored belongings, small access openings and unsafe conditions can restrict how much of the area can be inspected.
These limitations should be documented rather than ignored.
5. Roof Exterior, Gutters and Downpipes
Where safe access is available and the area falls within the agreed inspection scope, external roof elements may also be assessed.
Relevant observations can include the visible condition of:
- Roof coverings
- Flashings
- Gutters
- Downpipes
- Roof penetrations
- External deterioration
Roof condition becomes particularly relevant when looking for evidence associated with previous water entry or drainage concerns.
Safe access always comes first. Height, roof pitch, weather and property configuration can affect what can reasonably be inspected.
6. External Walls and Building Exterior
The exterior can reveal information about the condition and maintenance of a property.
An inspector may assess accessible external areas for:
- Visible cracking
- Deterioration
- Damaged finishes
- Movement indicators
- Separation or gaps
- Water staining
- Condition around openings
- Other significant visible defects
Property age and construction type matter.
An established Perth home may present different observations from a recently completed property. A renovated home can also contain a mixture of original and newer building elements.
That is why the actual property should be assessed rather than making assumptions based simply on its age or suburb.
7. Subfloor Areas
Not every Perth property has an accessible subfloor.
Some homes are built on slabs, while others may have raised areas or construction that provides underfloor access.
Where a subfloor exists and can be safely accessed, the inspector may assess visible:
- Supports
- Timber elements
- Deterioration
- Moisture indicators
- Ventilation-related conditions
- Visible damage
- Timber pest evidence when included in the inspection scope
Access can be restricted by low clearances, services, stored materials or the building design.
Again, inspection limitations should be clearly reported.
8. Drainage and Site Conditions
Drainage isn’t always the first thing a home buyer notices, but it can be relevant to the overall condition of a property.
Depending on the site and scope, an inspector may observe:
- Surface drainage
- Gutters and downpipes
- Water discharge locations
- Areas where water may collect
- Ground levels around accessible building areas
- Visible moisture-related deterioration
These observations can be particularly useful when considered alongside the property’s roof, exterior and moisture-related findings.
Does Perth’s Climate Affect a Building Inspection?
Yes, but it needs to be considered carefully.
Perth generally experiences hot, dry summers and cooler, wetter winters. That seasonal pattern makes the condition of roofs, gutters, downpipes, drainage and moisture-prone areas relevant when assessing a home.
A property inspected during a dry period may not have active water entry at the time of inspection.
However, previous water-related problems may leave indicators such as:
- Ceiling or wall staining
- Deteriorated finishes
- Moisture-related damage
- Roof-space staining
- Deteriorated external materials
- Drainage-related observations
This doesn’t mean Perth weather causes every moisture or building defect.
Property design, maintenance, construction, age, renovations, location and site conditions all need to be considered.
For example, coastal exposure can also create different considerations for some properties. Our article on Alkimos coastal homes and corrosion around roof screws and lintels provides a practical example of why local property context matters.
9. Termites and Timber Pest Evidence
One important distinction for buyers is that a building inspection and timber pest inspection are not automatically the same service.
If timber pest assessment is included, the inspector may look for evidence of:
- Termite activity
- Previous termite damage
- Other relevant timber pest evidence
- Timber deterioration
- Conditions that may increase timber pest risk
- Areas requiring further investigation
At StructSure, timber pest assessment is included with the Standard Building + Pest and Premium Building + Pest packages.
If you’re unfamiliar with the difference between the services, read What Is a Building and Pest Inspection?.
You can also see what inspectors look for in our Termite Inspection Checklist or learn about Signs of Termites in Your Perth Home.
For inspection options, visit our Termite & Pest Inspection Perth service page.
What Doesn’t a Building Inspection Cover?
Understanding inspection limitations is just as important as understanding what’s included.
A standard pre-purchase building inspection is generally visual and non-invasive.
That means an inspector cannot simply remove tiles, cut into walls, lift fixed flooring or dismantle building elements to investigate concealed areas.
Depending on the property and agreed scope, limitations may include:
- Concealed building elements
- Areas behind fixed finishes
- Inaccessible roof-space areas
- Inaccessible subfloor areas
- Areas obstructed by furniture or belongings
- Unsafe areas
- Defects without visible or measurable indicators at the time
- Specialist systems outside the agreed scope
This is why buyers should be cautious about claims that a non-invasive inspection can identify every hidden defect.
Where observations suggest further investigation is necessary, an appropriately qualified specialist may be recommended.
Does a Building Inspection Cover Electrical and Plumbing?
A building inspection isn’t the same as a specialist electrical or plumbing inspection.
Visible observations around accessible building areas may be recorded where relevant, but detailed diagnosis, compliance testing or certification of electrical, plumbing, gas or other specialist systems may require an appropriately licensed professional.
If you have a specific concern about a property’s electrical or plumbing system, ask about the inspection scope before booking.
What About Asbestos?
A standard visual building inspection should not be confused with a formal asbestos survey.
Older homes may contain materials that warrant further investigation, but confirming whether a particular material contains asbestos can require specialist assessment, sampling and testing.
If asbestos is a concern for the property you’re considering, arrange appropriate specialist advice.
What Should Be in Your Building Inspection Report?
The inspection itself is only part of the service.
The report needs to turn what the inspector observed into information you can actually understand.
A useful pre-purchase inspection report should clearly communicate:
Significant Findings
Important observations should be easy to locate rather than buried inside generic report text.
Photographic Evidence
Relevant photographs help you understand exactly what the inspector is describing.
Location
You should be able to identify where a reported issue was observed.
Inspection Limitations
If an area couldn’t be safely or reasonably accessed, that limitation should be documented.
Recommended Next Steps
Some observations may require assessment by another appropriately qualified professional.
Clear Explanations
Technical terminology should be explained sufficiently for a property buyer to understand why a finding deserves attention.
After receiving the report, the next question is often what to do with the information. Our guide to Negotiating After a Building Inspection explains some of the considerations buyers may face after receiving inspection findings.
What Should You Ask Before Booking a Building Inspector?
Don’t compare inspectors based on price alone.
Before booking, ask:
- What areas are included?
- Is timber pest assessment included?
- Will the roof space be inspected where accessible?
- Will the subfloor be inspected where accessible?
- Are thermal imaging and moisture assessment included?
- What happens if an area can’t be accessed?
- Will photographs be included in the report?
- Can I discuss significant findings afterwards?
- What qualifications does the inspector have?
- When will the report be delivered?
We’ve covered these questions in more detail in 10 Questions to Ask Before Booking a Building and Pest Inspection.
If cost is your main concern, also read our Building Inspection Cost Perth: 2026 Price Guide once published.
When Should Perth Buyers Arrange the Inspection?
For buyers purchasing an established property in Western Australia, timing can be important.
Your Offer and Acceptance (O&A) and any relevant special conditions may contain inspection requirements and deadlines.
Understand:
- Which inspection is required
- What the condition actually covers
- When the inspection must be completed
- What documentation may be required
- What happens if particular findings are identified
Don’t assume that simply obtaining an inspection creates a particular contractual outcome.
If you’re unsure about the meaning or legal effect of an O&A condition, seek advice from an appropriately qualified legal or settlement professional.
For broader buying-stage information, read What Every Perth Home Buyer Must Know Before Signing a Contract.
What If You’re Buying a New Build?
A standard pre-purchase inspection isn’t necessarily the best inspection type when a home is still being constructed.
If your property is under construction, Construction Stage Inspections Perth can assess relevant work at key stages while important building elements remain visible.
If your new home is approaching completion, a Practical Completion Inspection Perth focuses on visible defects, incomplete items and workmanship concerns around practical completion and handover.
The inspection should match the stage of the property.
Perth Home Buyer’s Building Inspection Checklist
Before you book, use this quick checklist.
Property areas: internal walls and ceilings, floors, wet areas, accessible structural elements, exterior, roof space where accessible, roof exterior where safely accessible, subfloor where applicable, drainage and relevant site conditions.
Building + Pest: termite evidence, timber damage and relevant conditions that may increase timber pest risk.
Inspection service: confirm inclusions and exclusions, inspector qualifications, report format, photographs, inspection limitations, additional tools and post-report support.
Buying process: check your O&A, identify relevant deadlines and arrange the inspection early enough to meet them.
The goal isn’t to find an inspector with the longest checklist.
It’s to make sure the areas relevant to your particular property are properly assessed and the significant findings are clearly explained.
Frequently Asked Questions
What does a building inspection cover in Perth?
Depending on the property, accessibility and inspection scope, a pre-purchase building inspection may cover accessible internal and external areas, structural elements, wet areas, roof space, roof exterior, subfloor, drainage and relevant site conditions.
Does a building inspection include a pest inspection?
Not automatically. At StructSure, timber pest assessment is included in the Standard Building + Pest and Premium Building + Pest packages. Building Only doesn’t include timber pest assessment.
Does a building inspector check the roof?
Relevant roof areas may be assessed where they can be safely and reasonably accessed. Height, pitch, weather and other safety conditions can limit roof access.
Does the inspector enter the roof space?
Where safe and reasonably accessible, the roof space may be inspected. Low clearance, insulation, stored materials or limited openings can restrict access.
Does a building inspection check for moisture?
Visible moisture-related observations can form part of the inspection. StructSure’s Premium Building + Pest package also includes thermal imaging and moisture assessment where appropriate.
Can thermal imaging detect a hidden leak?
Thermal imaging can identify temperature anomalies that may warrant further investigation, but it doesn’t see through walls or prove the presence or source of a concealed leak by itself.
Does a building inspection cover termites?
Only when timber pest assessment is part of the booked scope. StructSure’s Standard and Premium Building + Pest packages include a timber pest assessment.
How much does a building inspection cost in Perth?
StructSure currently offers Building Only for $299, Standard Building + Pest for $499, and Premium Building + Pest for $699.
Book a Pre-Purchase Building Inspection in Perth
An open home shows you how a property presents.
A professional inspection helps you understand more about its accessible condition before you make your next buying decision.
StructSure provides engineer-led Pre-Purchase Building Inspections Perth with clear photographic reporting and building + timber pest options.
- Building Only — $299
- Standard Building + Pest — $499
- Premium Building + Pest — $699
Call StructSure: +61 422 370 505
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