Termite damage in Perth homes usually shows up as blistered or rippled paint, timber that sounds hollow when tapped, doors and windows that suddenly stick, and mud leads running up slab edges, piers and door frames. By the time any of that is visible, termites have typically been feeding inside the timber for months.
This guide explains what termite damage looks like, where it hides in a cavity brick Perth home, what an inspection can and cannot tell you about it, what published Australian sources say repairs cost, and why your home insurance almost certainly will not pay for it. If you have not yet confirmed activity, start with the signs of termites in Perth homes.
In this article:
- What does termite damage look like?
- Where termite damage hides in a Perth home
- What a termite inspection can and cannot tell you
- What does termite damage cost to repair?
- Does home insurance cover termite damage?
- What to do if termite damage is found
- Buying a home with termite damage
- Frequently Asked Questions About Termite Damage in Perth
| Termite damage at a glance |
|---|
| Perth risk: high, with Coptotermes responsible for most serious structural damage in WA homes |
| First signs: blistered paint, hollow timber, tight doors and windows, mud leads, sagging floors |
| Where it hides: door and window frames, skirtings, roof timbers, subfloor and crawl space areas where accessible, patio and pergola posts |
| How it is found: a timber pest inspection to AS 4349.3, a visual inspection of accessible timber and conducive conditions |
| Insurance: standard home and contents policies in Australia generally exclude termite damage |
| Repairs: Bestwest does not quote repairs, published ranges are linked below |
| Get a free instant quote online, 24/7 at bestwestbuilding.com.au |
What does termite damage look like?
Subterranean termites eat timber from the inside and leave the outer skin intact, which is why damage is easy to miss until it is advanced. The signs registered builders and timber pest inspectors look for include:
- Blistered, rippled or bubbling paint on skirtings, architraves and door frames
- Timber that sounds hollow or papery when tapped, or that gives way under a screwdriver
- Mud leads and mud tubes on slab edges, piers, walls and inside cupboards, built by termites to control their environment
- Doors and windows that stick or no longer latch, caused by frames distorting as timber is eaten
- Sagging or springy floors and skirtings pulling away from the wall
- Fine soil or mud packing in cracks, joints and around power points
| KEY TAKEAWAY Never disturb, spray or pull apart suspected termite damage before it has been inspected. Disturbed termites abandon the area and re-enter somewhere less visible, which makes treatment harder and damage assessment less accurate. |
Where termite damage hides in a Perth home
Cavity brick is the dominant wall construction in Perth, and buyers often assume that makes a home termite-proof. It does not. The walls are brick, but the roof frame, door frames, window frames, skirtings, cornices and built-in cabinetry are timber, and termites reach them through slab edges, expansion joints, weep holes and mortar gaps.
The places our inspectors find damage most often are:
- Door and window frames, especially on the side of the house against a garden bed or paving that sits above the slab edge
- Skirtings and architraves in rooms with a wet area on the other side of the wall
- Roof timbers, reached via the wall cavity, where damage can go unnoticed for years
- Subfloor and crawl space areas where accessible in older timber-floored homes
- Patio, pergola and carport posts, fence posts and timber retaining walls, which act as a bridge to the house
- Timber stacked against external walls, sleepers and untreated landscaping timber
What a termite inspection can and cannot tell you
A timber pest inspection carried out under AS 4349.3 is a visual inspection of accessible timber and of the conditions that attract termites. It identifies active termites, evidence of previous activity, visible damage and conducive conditions such as moisture, timber in contact with soil and garden beds built above the slab edge.
What it cannot do is measure how far damage extends inside a wall, a frame or a floor if that area is not physically accessible. Termites eat from the inside, and a visual inspection reports what can be seen from the outside of the timber. Where damage is found, the report will recommend further investigation, which may mean removing linings or engaging a builder to open up the affected area.
| WHY IT MATTERS The inspection tells you that damage exists and where. A registered builder then assesses how much timber needs replacing and whether any of it is structural. Those are two different jobs, and buyers need both before they can put a number on the problem. |
What does termite damage cost to repair?
Bestwest does not quote or carry out termite damage repairs, so the figures below come from published Australian guides rather than from our inspectors. They are broad national ranges and every repair depends on how far the damage extends and whether structural members are involved.
| Damage level | Published repair range | Source |
|---|---|---|
| Minor visible damage (skirtings, architraves, a single frame) | $1,000 to $5,000 | Templeton Built, Termite Damage Repair Cost guide |
| Moderate damage to floor systems or wall framing | $5,000 to $30,000 | Templeton Built, Termite Damage Repair Cost guide |
| Severe structural work involving load-bearing members | $30,000 to $100,000 and above | Templeton Built, Termite Damage Repair Cost guide |
| Floor joists | $5,000 to $25,000 and above | LocalTradeGuide, Termite Treatment Cost Australia 2026 |
| Wall framing | $2,000 to $15,000 and above | LocalTradeGuide, Termite Treatment Cost Australia 2026 |
| Roof trusses | $4,000 to $30,000 and above | LocalTradeGuide, Termite Treatment Cost Australia 2026 |
Two things sit on top of those ranges. First, the colony has to be treated before any repair is worth doing, otherwise the new timber becomes the next meal. Second, for anything structural, a builder or engineer needs to confirm what is being replaced and how load paths are restored.
| IMPORTANT NOTE Treat every published range as a starting point for a conversation with a registered builder, not as a quote. Perth labour and material costs, access and the amount of concealed damage all move the final figure. |
Does home insurance cover termite damage?
In most cases, no. Standard home and contents policies in Australia are built to cover sudden, unforeseen events, and insurers treat termite damage as gradual and preventable. According to Finder’s guide to home insurance and termites, most policies specifically exclude loss or damage caused by insects and vermin, and termite damage is not normally covered.
What to do if termite damage is found
- Do not disturb the area or spray it. Leave the termites where they are so the technician can see the full extent of activity
- Book a timber pest inspection if you do not already have a report, so the activity, damage and conducive conditions are documented
- Treat the colony. Spot treating live termites inside the home is a short-term measure only, because the colony typically relocates within one to two months. Bestwest recommends proceeding to a full termite barrier, which is explained in our guide to termite barriers in Perth
- Have the damage assessed by a registered builder once the activity is under control
- Fix the conducive conditions: leaking taps, garden beds above the slab edge, timber against walls, poor subfloor ventilation
- Book annual timber pest inspections from then on
Buying a home with termite damage
Previous termite damage is common in established Perth suburbs and it is not automatically a reason to walk away. What matters is whether the activity is current, whether the damage has been properly repaired, and whether a barrier is in place and maintained. A combined building and pest inspection answers all three, and the inspector’s phone consultation after the report is the right place to ask what the findings mean for your offer.
Bestwest Building’s extensive team of highly experienced registered builders has completed more than 50,000 inspections across Perth and the South West, and every combined inspection includes a timber pest inspection to AS 4349.3 with a same-day digital report.
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Frequently Asked Questions About Termite Damage in Perth
How fast can termites damage a house?
A mature colony can cause significant damage to timber framing within one to two years of finding a way in, and the damage is concealed until it is advanced. That is why annual timber pest inspections are recommended across Perth.
Can termite damage be repaired?
Yes. Damaged timber is typically removed and replaced, and structural members are reinstated to restore load paths. The colony must be treated first, and any structural work should be assessed by a registered builder or an engineer.
Does a building inspection find termite damage?
A building inspection under AS 4349.1 notes visible timber damage, but termite activity is assessed in the timber pest inspection under AS 4349.3. A combined building and pest inspection covers both in one visit.
Is termite damage covered by home insurance in Australia?
Generally not. Most standard home and contents policies exclude damage caused by insects and vermin because insurers treat it as gradual and preventable. Read the exclusions in your policy documents to confirm.
Should I buy a house with previous termite damage?
It depends on whether the activity is current, whether the repairs were done properly and whether a barrier is in place. A combined building and pest inspection gives you the evidence to decide and to negotiate.
