Concrete Sleeper Retaining Walls
A strong, low-maintenance option for the steeper blocks between the lagoon and the ridge, built with galvanised steel components specified for coastal exposure rather than standard-grade fittings.
Read more →Retaining Wall Building From the Lagoon to the Ridge
We build concrete sleeper, timber, sandstone and gabion retaining walls for homes across Narrabeen, and the ground here isn't one single type of block. Streets running down toward Narrabeen Lagoon tend to sit flatter and lower, while the land climbing away from the water gets steep quickly, often needing a proper retaining structure just to make a yard usable at all. This stretch of coast has shown how much ground can move here. The East Coast Low that hit Collaroy-Narrabeen Beach in 2016 was the biggest erosion event on this coastline in four decades, and it's a real reminder that wall failure isn't a hypothetical risk this close to the water. Add the salt air rolling in off the beach, which speeds up corrosion in steel fittings and shortens the working life of untreated timber, and it's clear a Narrabeen retaining wall needs to be built for this specific coastline rather than a generic inland block. If your wall is ageing or you're planning a new one, get in touch and we'll walk you through what your site actually needs.
Our Range of Retaining Walls for Narrabeen Properties
Timber Retaining Walls
A natural look that suits Narrabeen's older streetscapes, built in properly treated pine or hardwood so it isn't fighting salt air and damp lagoon-side soil from day one.
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Sandstone Retaining Walls
A durable, established-looking wall that holds up well against the coastal weathering common on this stretch, laid in sawn, cut or random layouts.
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Gabion Retaining Walls
A permeable option well suited to the flatter, lower blocks near the lagoon where water can sit and drain slowly after rain.
Read more →Built for the Ground Between Lagoon and Ridge
On lagoon-side blocks, drainage gets planned before a single post goes in, because ground that sits low and flat here holds water for longer than the sloped ground further up does. On steeper blocks toward the ridge, footings and post depth get set for the actual load rather than guessed at. Every fixing and fastener is specified for salt-air exposure this close to the beach, galvanised steel and correctly treated timber rather than components that corrode or rot faster on this coastline. We keep you across what your specific street requires, rather than leaving you to work out on your own whether your wall needs council sign-off or an engineer's design.
Retaining Wall Questions Narrabeen Homeowners Ask
Do I need council approval or an engineer for my retaining wall?
It depends on the wall's height and how close it sits to a boundary. A lot of retaining walls on Narrabeen's sloped blocks fall outside what's exempt and need either council approval, an engineered design, or both. We work out what your wall needs before pricing the job, not after.
My existing wall is leaning or cracking, does it need replacing?
On this coastline, an older timber or sandstone wall showing movement is often past the point of a patch-up fix, especially once salt air has gotten into steel fixings or timber has been sitting against wet lagoon-side soil for years. In most cases the practical answer is a properly engineered replacement built for the site, not a repair that buys a few more years.
Will you handle drainage so the wall doesn't fail down the track?
Yes. Drainage is planned into the wall from the design stage, which matters more here than on a typical inland block given how much water moves through low-lying ground near the lagoon after rain.
Do you build retaining walls throughout Narrabeen?
Yes, from the flatter lagoon-side streets through to the steeper blocks higher up toward the ridge. If you're not sure whether your part of Narrabeen is covered, get in touch and we'll confirm it.
Get Your Narrabeen Retaining Wall Sorted
Whether you're levelling ground near the lagoon or holding back a steep run of yard further up, a retaining wall built for Narrabeen's coastline needs the right material, the right drainage and fittings that won't corrode in the salt air. Tell us about your block and we'll talk you through what it needs.
