What we look for in Oldbury, and why it differs from the suburb next door. 33.9 km from the CBD, 13.3 km from the coast, postcode 6121.
Oldbury is a rural locality on the western side of the Shire of Serpentine-Jarrahdale, near Mundijong and Oakford. Rural land in this shire is used mainly for agriculture and equine activities, and Oldbury is genuinely agricultural rather than lifestyle rural. That distinction changes the inspection.
Working agricultural land means working buildings, and those form the substance of what is being bought. Machinery sheds. Hay and feed storage. Stockyards and race systems, and on some holdings a dairy or a workshop.
They need assessing in their own right or explicitly excluding. On a farm they frequently carry more value than the dwelling itself, and the scope should be agreed in writing before anyone drives out.
The locality sits on low western flats drained by the Serpentine catchment and its watercourses, so expect seasonally wet ground on parts of a holding. That affects footings and drainage, along with any subfloor, and it is the sort of condition a summer inspection reliably understates.
Unsewered rural holdings bring septic or aerobic treatment systems, bore and tank water, and long private driveways. Each is part of the purchase and each is expensive to put right.
The shire covers over nine hundred square kilometres and is growing rapidly along its central spine, so confirming zoning and what is planned for surrounding land is worth doing before committing. In a district under this much development pressure, the neighbours matter.
Farm buildings are the exposure, and on a working property there are a great many of them.
Sheds sitting directly on soil rather than on footings. Yard and race timbers set into ground across long runs. Feed storage holding moisture in enclosed spaces. Stacked timber and disused equipment that has not moved in years. Windbreak plantings running up to buildings.
Seasonally wet flats supply the moisture, and on the low ground it is present for months rather than weeks.
Irrigation for paddocks keeps soil damp through summer when the surrounding plain has dried.
The house itself is usually the least of it. Where floors are timber the subfloor comes first, and on a farm dwelling of any age there will be no chemical protection to speak of.
A working farm is not inspected in an hour. Yards and sheds. Water and effluent. The house itself, and the boundaries between all of it. That is one circuit, and it produces both reports. Reported under AS 4349.1 and AS 4349.3.
Buyers want the bore, the treatment system and the farm structures assessed as specific items. None of them is covered by an inspection of the house, and each of them is expensive to put right once it fails.
Check what is proposed for surrounding parcels. In a shire growing this fast, agricultural neighbours today may not be agricultural neighbours in a decade, and that affects both value and amenity. Disputes on farm holdings tend to concern access easements and boundaries, or a structure that turned out never to have been approved. We prepare reports on those.
Oldbury 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 Oldbury:
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.
Casuarina, Wellard, Anketell, Oakford and Cardup sit on the same ground as Oldbury, 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.
Bertram is 5.6 km away but sits on the Spearwood 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 Oldbury 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 13.3 km from the coast, out in Serpentine - Jarrahdale, coastal salt is not the first thing an inspection in Oldbury chases. The fee buys closer work on footing movement, site drainage and the reactive-ground behaviour of the South East suburbs, with delignification checked only where a tiled roof meets a busy corridor.
Pre-purchase building inspection in Oldbury →
Building and pest inspection in Oldbury →
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 13.3 km inland, Oldbury 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.
PERTH