Updated October 2026
Pickering Brook is working orchard country at the scarp's edge, part of the Hills Orchard Areas the City of Kalamunda has recognised since the first plantings in 1891. We connect you with retaining wall builders who cover the 6076 area.
Common wall situations in Pickering Brook
Orchard and rural retaining work: terracing on sloping planting ground, driveway cuttings, shed and machinery pads, and batters around dams and tracks. The City of Kalamunda records that no sewer system is available to the rural or semi-rural areas of the district, so the property runs its own system and the tank, leach drains and irrigation area form part of the site plan.
Pickering Brook also sits inside the Middle Helena Catchment Area, a gazetted public drinking water source area, so earthworks and drainage carry more scrutiny than they would on the plain.
The ground under Pickering Brook
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.
One more local matter. The City of Kalamunda records that Bickley, Piesse Brook, Kalamunda, Pickering Brook and Carmel sit inside the Middle Helena Catchment Area, a gazetted public drinking water source area where Water Corporation monitors development to protect water quality. In a catchment, earthworks and drainage attract closer attention. We will not tell you what the rules are, because that turns on your site, but it gets checked before work starts.
What a wall costs in Pickering Brook
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 Pickering Brook
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 Kalamunda before you build.
Who is allowed to build it is a statutory question in WA, and it turns on how the work is classified under the building legislation rather than on a figure you can look up and apply yourself. We are not going to settle that on a web page. What is worth doing is simple: ask the builder what registration or licence they hold, check it with Building and Energy, and ask your permit authority what your particular wall requires before you sign anything. Before any digging, your builder should lodge a free Before You Dig Australia (BYDA) enquiry so underground services are located.
Frequently asked questions
What suits orchard terracing?
Low timber or interlocking block where nothing drives above it, and concrete sleeper or reinforced block where a track, a machine or a shed does. The load above the wall decides the material, not the look.
Is a permit needed on an orchard block?
The same test applies as anywhere in WA: 500mm of retained ground, no association with other building work, no effect on the land next door. Lot size does not change that test. The City of Kalamunda is the permit authority, so confirm your wall with them.
How does the catchment affect drainage design?
It means the discharge point and the earthworks get examined rather than assumed. Your builder confirms the position before the wall is designed.
Ready to sort your wall? Get a fast quote