What we look for in Whitby, and why it differs from the suburb next door. 38.9 km from the CBD, 22.2 km from the coast, postcode 6123.
Whitby lies between Byford and Mundijong and is one of the shire's designated growth areas. The Mundijong-Whitby Development Contribution Plan applies to it. Almost all of the housing is recent estate construction on former rural land.
New estate stock means the inspection concentrates on how well a house was built rather than how it has aged. Handover defects. Whether they were rectified while the builder remained liable. Whether the defect liability period is still open, which on a suburb building this recently it frequently is.
Most owners never check that window and it closes quietly.
Building on former farming land brings bulk earthworks and imported fill under slabs, so site preparation is the structural question. Fill depth. Compaction. Drainage. Where a slab has moved, that is where to look before assuming workmanship, and the records exist.
Legacy items from the rural use sit under some parcels. Old bores. Irrigation lines. Shed slabs and yard hardstand that were covered rather than removed.
Tributaries of the Wungong and Serpentine catchments run through the district, so low-lying parcels near a watercourse carry a seasonal water table and drainage that has to work rather than merely exist.
The Development Contribution Plan is worth understanding for a specific lot, because it can affect what development costs. That is knowable in advance and it will not appear in any building report.
Watercourses are what set Whitby apart from a dry estate suburb. Tributaries of two catchments cross the district, and a parcel near one of them holds moisture through months when the rest of the shire has dried out.
That is the condition a colony depends on, and here it comes from the landscape rather than from anything going wrong at a house.
Under it all sits former farming ground, which leaves fence posts and shed bearers in soil when land is subdivided rather than removing them.
Every home carries a termite management system with a durable notice recording it. Find it, note the date.
Then look at what the garden has done to the slab edge. In an estate landscaped this recently, soil and paving over that junction is the norm rather than the exception, and a barrier that cannot be inspected cannot be relied on.
On a new house the perimeter is where both reports are written, and it is a short walk. Splitting it across two visits doubles the travel for no additional information. Reported under AS 4349.1 and AS 4349.3.
Ask for the fill and site preparation records. On former rural land turned into an estate, that documents what a slab is sitting on and it is a routine request.
Staged inspections during construction catch problems at slab and frame, both of which are visible once and then covered for the life of the building. Condition records apply where a finished home now sits beside a lot about to be built on, which in a designated growth area describes a great many properties.
Whitby sits on the Guildford Formation — alluvial clay and sandy clay laid down by the Swan and Canning systems. This is the reactive ground. Clay here shrinks and swells with moisture, which is what puts stepped cracking through brickwork and takes doors out of square between seasons. Articulation joints matter on these sites, and a great many older houses do not have them where a current standard would want them.
What that means in practice, on a house in Whitby:
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.
Byford Station is the fixed point most people in Whitby 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.
Mundijong and Byford sit on the same ground as Whitby, 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.
Cardup is 3.2 km away but sits on the Bassendean dune system; Mardella is 6.5 km away but sits on the Bassendean dune system; Oldbury is 9.0 km away but sits on the Bassendean dune system; Serpentine is 9.0 km away but sits on the Bassendean 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 Whitby 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 22.2 km from the coast, out in Serpentine - Jarrahdale, coastal salt is not the first thing an inspection in Whitby 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 Whitby →
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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.
At 22.2 km inland, Whitby 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