What we look for in Innaloo, and why it differs from the suburb next door. 8.9 km from the CBD, 2.4 km from the coast, postcode 6018.
Innaloo was Njookenbooroo, the Noongar name for the swamp that once sat here. In 1898 Town Properties subdivided the land around it as market gardens and drained the swamp into Herdsman Lake by digging channels. The suburb was renamed in 1927. What was done to that ground still matters.
Draining a swamp does not remove the water. It moves it. Made ground, old drainage channels and a water table that was engineered rather than natural all sit beneath parts of the suburb, and where a house shows movement that history is worth understanding before blaming workmanship.
The housing has an unusual signature for Perth. Most original homes here are timber framed, built around the Second World War, rather than the double brick that dominates suburbs of similar age. A timber framed house on stumps is a different inspection. The subfloor carries the structure, so stumps, bearers, joists, ventilation and moisture get assessed directly, and asbestos era cladding is likely on anything unrenovated.
Development accelerated during the war and was essentially complete by 1970, so the stock is now sixty to eighty years old with services either original or into an ageing first replacement.
Older homes are gradually being replaced by brick and tile units, so new strata sits beside old timber cottages. Establish which you are buying. Around nine kilometres inland near Herdsman Lake, groundwater is the story rather than salt.
Timber framed houses over drained swamp ground is a demanding combination, and it is the reason this suburb deserves a careful pest inspection rather than a routine one.
The structure itself is timber. The subfloor sits over ground that was wetland within living memory and still carries an engineered water table. Ventilation under a wartime cottage was limited to begin with and is frequently restricted further by later additions built across the vents.
Old drainage channels and made ground can hold buried timber. Eighty year old gardens contribute stumps and buried debris of their own. Any barrier on stock of this age is absent or long expired.
On a timber framed house everything decisive sits under the floor, and both inspections read it off the same stumps and bearers. Opening the hatch once for two reports is the obvious arrangement. Reported under AS 4349.1 and AS 4349.3.
Unit development is replacing old cottages steadily, so we do handover inspections on new strata and condition records for the timber framed house next door while excavation happens.
On the wartime stock, restumping and floor work are far easier to assess while open than after they are closed in, so staged inspections during renovation earn their keep. Additions of that era frequently lack approval, and tracing them is routine work here.
If a house is timber framed, get under it before you commit. On this construction the subfloor holds the entire answer, and nothing visible from inside the house will substitute for what is down there.
Innaloo surprises people because most of its original homes are timber-framed, built around the Second World War, rather than the double-brick you might expect. That means the inspection has to cover what timber-frame stock demands: stump and pier condition, borer, framing, and the subfloor, and because the era is post-war, asbestos materials are likely. This is a different inspection from a brick-and-tile suburb, and reading the timber structure properly is central to it.
The ground compounds it. Innaloo was built over a drained swamp, Njookenbooroo, channelled to Herdsman Lake, so there is made ground, old drainage channels, and a water table in the low western and southern parts, which brings settlement and subfloor damp risk. That combination of timber floors over damp, made ground is exactly the setting where timber decay establishes, so moisture and subfloor condition get real attention. The older stock is progressively being replaced by brick-and-tile units, so you find new strata beside old timber cottages. Near Herdsman Lake and inland, salt and delignification are low priority; the ground water and the timber frame are the Innaloo story.
On an original timber-framed Innaloo home the structure leads the inspection. The stumps or piers are checked for settlement and rot, the framing is read where it can be seen, and the subfloor is entered where access allows, because that is where a timber-frame home's condition is genuinely established. Given the drained-swamp ground beneath much of the suburb, the subfloor is also read for the damp a high water table drives, and any settlement in the floor is traced to the made ground below. Post-war construction means asbestos-era materials are likely, so eaves, linings and sheeting are noted for licensed assessment, and where a home has been replaced by units the strata picture is established instead.
None of it is guesswork. Reading the stock above into an inspection, these are the checks the Innaloo pattern pushes to the top of the list:
Innaloo sits on the Spearwood dune system — residual yellow and grey sand over a Tamala Limestone core, with the rock often close to the surface. Limestone near the surface makes for stable footings and expensive excavation. Where the rock is shallow, older houses often sit directly on limestone footings, and those are the ones to look at for rising damp and salt damp at the base of the wall.
What that means in practice, on a house in Innaloo:
Landform is assigned from the suburb's position on the Swan Coastal Plain rather than from a site soil test. It tells you what to expect, not what you have. A site classification to AS 2870 is a different exercise and a different report.
Stirling City Centre is the fixed point most people in Innaloo navigate by. Buildings like it are useful to an inspector for a duller reason: they date the area. Whatever era put that up is usually the era that put up the houses around it, and the construction methods of that decade are what we expect to find in the roof.
Stirling, Woodlands and Gwelup sit on the same ground as Innaloo, so the footing behaviour and the drainage problems tend to repeat across all of them. If you are comparing houses across those suburbs, you are largely comparing the same site conditions.
Doubleview is 1.5 km away but sits on the Quindalup dune system; Scarborough is 2.4 km away but sits on the Quindalup dune system; Wembley Downs is 3.1 km away but sits on the Quindalup dune system. That is the useful thing about this part of Perth: the ground can change inside a few kilometres, and with it what an inspection is looking for.
On site classification: any soil zone quoted for a suburb is indicative, inferred from geography rather than surveyed. A real AS 2870 classification comes from geotechnical work on your actual block and can differ from the one next door. We report what we observe; we do not read your soil class off a map.
The inspection is visual and non-invasive, over the readily accessible areas, reported to AS 4349.1. Our inspectors physically enter the roof space, as long as there is sufficient access. Report within 24 hours of the inspection.
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Flat fee, the same in Innaloo as anywhere: $440 inc. GST for a pre-purchase building inspection, or $616 inc. GST with the timber pest scope added in the same visit. Full price list →
At 2.4 km from the water, Innaloo sits inside the coastal-salt band — the band where coastal salt drives the defects. The fee concentrates on delignified battens, corroded ties and fixings, and the salt staining that starts inside the masonry, with the roof space taking the longest on a tiled roof past its first decade.
Pre-purchase building inspection in Innaloo →
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Yes. Our inspectors physically enter and inspect the roof space, as long as there is sufficient access to do so safely. Where access is restricted, the report says so plainly rather than implying we saw more than we did.
Innaloo is 2.4 km from the coast, inside the band where delignification should be expected in tile battens. On a tiled roof more than about ten years old it is one of the first things we look at.
Within 24 hours of the inspection itself, not 24 hours from booking. On a pre-purchase or pre-settlement job that timing is the whole point, because your leverage disappears once you are committed.
We would rather you checked than took our word for it. These are the bodies that actually hold the records and set the rules:
Tell us about the property and what you need. We'll come back to you with a firm quote and a time.
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