Updated October 2026
Stratton is a City of Swan locality named on the primary record among those sitting at the Darling Scarp's western edge, so the slope here is real rather than assumed. We connect you with retaining wall builders who cover the 6056 area.
Common wall situations in Stratton
Blocks that step toward the scarp, so the work is terracing a yard into usable levels, driveway cuttings and edges, pad levelling, and replacing walls built without ag-pipe or gravel behind them. Where a wall carries a driveway or a built structure above it, that is a surcharge and engineering follows whatever the height.
Whether your block is on reticulated sewerage or running its own system is worth establishing before a machine arrives, because where a tank, leach drains or an irrigation area sit decides where the wall line can go, where spoil can be stacked and where its drainage can discharge. Your local government holds the records for your address.
The ground under Stratton
Perth is a sand city. Up here it is not. The ground is ironstone and laterite gravel over weathered granite, and the City of Kalamunda records in its Local Planning Strategy that reticulated sewerage is constrained in the Hills because hard granite sits close to the surface and is costly to dig through. That same rock is what a post hole has to get through, so ask any builder how the quote prices a hole that hits it.
Drainage is the thing that actually matters. Water that cannot soak away through rock travels sideways and arrives behind the wall, and the Shire of Mundaring names heavy soils and perched water tables as Hills constraints for that reason. Ag-pipe, free draining gravel, geotextile fabric and a lawful discharge point are not optional line items.
What a wall costs in Stratton
As a rough guide, most residential walls run from around $200 to $700 or more per metre for a wall about a metre high, depending on material, height, access and engineering. Those are published Australian guide figures rather than a quote, and rock is the reason a Hills number can sit above them. Read the retaining wall cost guide and then get a price for your block.
Approval, and who to ask in Stratton
In WA a retaining wall is exempt from needing a building permit only where it retains no more than 500mm of ground, is not tied to other building work or to holding up the land next door, and is not work of a kind that affects adjoining land. The measurement is the ground the wall retains, not the height of the wall, which catches a lot of people out. All three conditions have to be met, so a wall on or near a boundary needs a permit whatever its height. Development approval under the local planning scheme can be a separate question again, and the rules change, so confirm your wall with the City of Swan before you build.
On who may carry out the work, WA draws the line by how the work is classified under the building legislation, not by a dollar threshold a homeowner can apply to their own job, and the position for a standalone retaining wall is not something to take from a website. Ask any builder what registration or licence they hold and verify it with Building and Energy, and ask your permit authority what your wall requires. Have the builder lodge a free Before You Dig Australia (BYDA) enquiry before anything is dug.
Frequently asked questions
Is Stratton actually on a slope?
Yes. It is one of the sixteen localities named on the primary record as sitting at the scarp's western edge, alongside Swan View, Greenmount and Darlington.
What is the ground like?
Laterite and ironstone gravel over weathered granite is the likely profile. Rock in the post holes is a real possibility and a real cost, so ask how the quote treats it.
Who is the permit authority?
The City of Swan. The 500mm retained-ground test is the WA position rather than a Swan one, and the City of Swan does not publish a retaining wall threshold of its own, so ask them what your wall needs rather than working from a figure found elsewhere.
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We also cover nearby Jane Brook and Koongamia.