What we look for in Coolbellup, and why it differs from the suburb next door. 15.5 km from the CBD, 4.5 km from the coast, postcode 6163.
Coolbellup was North Lake until 1957 and was built almost entirely by the State Housing Commission as a post war social housing experiment. It held the nation's first transitory migrant flats. The character stock has a very particular signature, and it is not what most Perth buyers expect.
The typical Coolbellup house is a 1960s three bedroom, one bathroom brick and tile cottage with solid timber floors, on a block of around seven hundred square metres. Solid timber floors matter, because most suburbs of that era went to slab, and a suspended timber floor changes the whole inspection.
It means there is a subfloor to get into. That changes everything. Stumps, bearers, joists, ventilation and moisture all get assessed directly rather than inferred, and where later additions have been built over the original vents the airflow the house depends on has been cut off.
Major urban renewal ran through the late 1990s and 2000s. Older flats were demolished or upgraded, most public housing was sold to private owners. Old school sites were redeveloped. So the suburb is now genuinely mixed and gentrifying, with original cottages, heavily renovated cottages and new builds on former flat and school land sitting together.
Large blocks are subdividing, which produces an original house at the front and a new build behind. The ground is grey Bassendean sand near the Beeliar wetlands. Well back from the coast, salt and delignification are a low priority.
Solid timber floors put this suburb at higher termite exposure than its slab built neighbours, and that is the single most important thing to know here. The structure itself sits on timber, over ground, with a subfloor void between.
The priorities follow directly. Mud leads on stumps and piers. Damage in bearers and joists, particularly under wet areas where sixty year old plumbing has been patched. Ventilation blocked by paving, raised beds or an addition built across the vents.
Sixty year old gardens on large blocks hold buried timber and old stumps. Any barrier from the original construction is long finished, and on stock that spent decades in public ownership very few were ever renewed.
Everything that decides the condition of a Coolbellup cottage sits in the same place, which is under it. Structure and pest evidence are read off the same stumps and the same bearers, on the same visit, by someone already down there. Booking the two separately means opening the hatch twice for one answer. Reported under AS 4349.1 and AS 4349.3.
Renovation is heavy here, so staged inspections while a cottage is opened up are worth having. On a timber floored house, restumping and floor work are far easier to assess while exposed than after they are closed in.
Subdivision brings condition records for the front cottage when a rear dwelling goes in, and handover inspections on the new build. On houses that came out of public ownership, additions frequently lack paperwork, so tracing approvals is routine work here rather than exceptional.
Coolbellup 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 Coolbellup:
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.
Beeliar Regional Park is the fixed point most people in Coolbellup 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.
Samson, North Lake, Kardinya, Hilton, Bibra Lake and O'Connor sit on the same ground as Coolbellup, 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.
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 Coolbellup 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 4.5 km from the water, Coolbellup 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.
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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.
Coolbellup is 4.5 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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