Clarkson, in the City of Wanneroo, is an established northern-coastal suburb built over dune country, so many homes sit above or below their neighbours and the street. Plenty of walls here date from when the suburb was developed and are now being repaired, replaced or extended as families renovate. Retaining Walls Perth connects Clarkson homeowners with a local, insured specialist for a free quote.
Call 0485 557 649 for a free, no-obligation quote from a local, insured Perth retaining wall specialist.
Typical Clarkson jobs
- Replacing leaning or cracked limestone walls on established homes
- Back-yard terraces on sloping blocks
- Driveway walls on lots above or below the road
- Levelling for pools, patios and granny flats
- Boundary walls shared with neighbours
Sandy slopes
On sloping sandy ground, cuts into the slope stay open only briefly, so excavation is usually staged with the wall going up straight away, and any rock struck can slow drilling for sleeper wall posts. Design matters more on slopes: a tall wall with a house or pool above needs an engineer.
Shared walls with neighbours
On an established suburb with stepped lots, many walls sit on or near the boundary. If an existing boundary wall is wholly or partly on the boundary and needs repair, Building Act 2011 s89 says each owner generally contributes equally unless otherwise agreed. If you’re replacing it, any encroachment needs written consent (form BA20). The Dividing Fences Act 1961 deals with the fence on top, not the wall.
Tiered terraces
The City of Wanneroo assesses tiered walls on their total height, so a set of low garden terraces can add up to permit territory. Plan the terraces as one design.
Permits in Clarkson: City of Wanneroo
The City of Wanneroo requires a building permit where a wall exceeds 500 mm, is an addition to an existing wall, or tiered walls exceed 500 mm in total. Planning approval is needed in the Residential zone where walls don’t comply with the R-Codes, and must be obtained before the building permit is issued. The R-Codes also limit fill within 1 m of a boundary to 0.5 m above natural ground unless a local development plan says otherwise, so check any estate LDP. Full detail in our WA permit guide.
What it might cost
Published Perth guides put typical installed prices as of 2026 at about $260 to $630 per lineal metre for concrete sleeper walls and about $420 to $680 per square metre of face for limestone, before drainage, engineering and permits. These are typical ranges, not quotes; see the Perth cost guide. Your Clarkson specialist will price your actual site.
Clarkson retaining wall questions
My limestone wall is bulging. Can it be repaired?
Sometimes a section can be re-laid; often the cause is water or load, so a specialist needs to see it. Rebuilding over 0.5 m generally needs a permit.
Do you cover Merriwa, Ridgewood and Mindarie?
Call 0485 557 649 to check coverage for your address.
Get a free Clarkson quote
Retaining Walls Perth is a referral service: we connect Clarkson homeowners with a local, insured retaining wall specialist, who quotes and contracts with you directly. Call 0485 557 649, or see other areas we serve.
Sources
- Landscapes WA, "Retaining wall cost in Perth" (12 Sep 2026)
- What's The Damage, "Retaining Wall Cost Perth 2026"
- Luke's Landscaping Co., "Limestone vs concrete retaining walls in Perth" (2026)
- The Quote Yard, "Concrete Sleeper Retaining Walls WA 2026"
- Building Regulations 2012 (WA) Sch 4 cl 2 item 6
- R-Codes Vol 1 cl 5.3.7 & Table 4 (10 Apr 2026)
- Building Act 2011 (WA) s89
- Legal Aid WA, dividing fences and boundary issues
- City of Wanneroo
- Soil context: Australian Geomechanics Society, Residential footings – Perth metropolitan area
- Luke's Landscaping Co. (24 Jul 2026), Perth soils by suburb