What we look for in Ferndale, and why it differs from the suburb next door. 10.6 km from the CBD, 15.8 km from the coast, postcode 6148.
Ferndale was rural until the 1960s, and within living memory it was dairy country. Bob Mounsey ran a dairy farm here, and his children rowed across the Canning River to get to school. Development began in earnest in the late 1960s. Sixty years back. It shows now.
Former dairy farm land on river flats is the ground story. Low lying river flat blocks carry a high water table, flood context and subfloor damp, and drainage that copes in February may struggle in August. Where a house shows movement on low ground, that is where we start rather than assuming poor workmanship.
The housing is late 1960s and 70s onward, so mature homes with services either original or into a first replacement that is now ageing itself. Roof plumbing, hot water, wiring and wet area waterproofing are the recurring items at this age, and asbestos era materials are likely in anything unrenovated.
The Canning River Regional Park adjoins the suburb, which brings wetland and a raised water table to park edge blocks along with some bushland pressure. Being on the river rather than the coast, salt and delignification are a low priority. It is a small suburb of about four and a half thousand people and the housing is fairly consistent, which makes it more predictable than most.
Agricultural history matters underground. Dairy land carries a legacy that suburban ground does not. Old fence lines with posts set into soil. Buried timber from yards and sheds. Disused irrigation and stock water lines that leak long after anyone is watching them. Some of that remains under and around houses built in the 1970s.
The regional park boundary is the other factor. Retained, permanently. Continuous wetland vegetation holds established colonies, and blocks backing onto the park face steadier foraging pressure than interior streets.
On slab built homes the perimeter and slab edge take priority, particularly where fifty years of garden and paving have been built up over them. Original barriers are long finished. On low ground the moisture that sustains a colony is permanent rather than seasonal.
River flat drainage explains findings on both sides of the report, so having one inspector form a single view of how wet the site is beats assembling it from two separate visits. The perimeter and the drainage serve both assessments. Reported under AS 4349.1 and AS 4349.3.
Mature stock on reasonable blocks brings renovation and subdivision, so building stage inspections and practical completion inspections come up on new builds behind old ones. Dilapidation reports apply where that work adjoins an existing house.
We also do pre-settlement inspections and expert witness reports, which on river flat ground commonly concern drainage between neighbours. If you are buying on the low side of the suburb, ask what happens here after a week of winter rain. Neighbours who have lived through a few know exactly, and the answer is more useful than any map.
On a former dairy block, it is also worth asking whether the vendor knows what stood on the land before the house. Sometimes they do, and it changes how a moving slab should be read.
Ferndale sits on the Bassendean dune system — deep leached grey quartz sand, almost pure, and very free draining. Bassendean sand is about as unreactive as a building site gets, so seasonal footing movement is rarely the story here. The water table is the story. Parts of this system sit over the Gnangara Mound and the standing water level can be within a couple of metres of the surface.
What that means in practice, on a house in Ferndale:
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.
Greenfield St Bridge and Canning River Regional Park are the fixed points in Ferndale. They matter to an inspection for an unromantic reason: they date the surrounding stock. The decade that built them is usually the decade that built the houses around them, and that decade decides what is in the roof, what is in the walls, and what the wiring looks like.
Lynwood, Cannington, Wilson, Parkwood, Beckenham and Langford sit on the same ground as Ferndale, 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 Ferndale 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 →
Well inland at 15.8 km from the coast, out in Canning, Ferndale is far enough from the water that salt takes a back seat. The same fee goes into footings, drainage and the ground movement typical inland, and the tiled roof is checked for delignification only near heavy traffic.
Pre-purchase building inspection in Ferndale →
Building and pest inspection in Ferndale →
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.
At 15.8 km inland, Ferndale carries lower coastal-salt exposure, so delignification is not the first thing we would expect. It remains possible near heavy arterial corridors or industrial emissions.
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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