The Sutherland Shire covers everything from sandy beachside streets in Cronulla to steep waterfront blocks on the Port Hacking and Georges River, and sandstone ridges in Menai and Engadine. The right retaining wall depends heavily on which part of the Shire you are in.
Waterfront and sloping blocks
Suburbs like Burraneer, Dolans Bay, Lilli Pilli, Yowie Bay, Oyster Bay and Como have steep slopes down to the water. Terraced walls are common, turning a steep block into usable levels. Foreshore areas can carry extra planning controls, so design starts with checking what is allowed.
Sandstone ridges
Much of the Shire sits on Hawkesbury sandstone. Rock close to the surface makes excavation slower and may need rock breaking, but it also provides excellent footings when walls are founded on it properly.
Sandy coastal soils
Around Cronulla, Kurnell and Woolooware, sandy soils drain well but need geotextile behind walls to stop sand washing through, and footings that reach good ground.
Bushfire and trees
Bushland edges may be bushfire prone, which can affect materials and approvals. Significant trees are protected, and walls need to be designed around root zones where required.
Approvals
Low retaining walls are often exempt from approval if they meet the conditions, but taller walls, walls on boundaries and walls in foreshore or environmental areas may need approval from Sutherland Shire Council or a complying development certificate.
Which wall suits the Shire?
- Sandstone to match the Shire's natural rock and waterfront landscapes.
- Concrete sleeper for durable, cost-effective garden and boundary walls.
- Gabion for steep, wet or hard-to-drain sites.
- Engineered concrete or block for tall walls and driveways.
Retaining wall builders for the Shire
See our Sutherland Shire retaining wall service or book a free site assessment.
Frequently asked questions
Are retaining walls exempt from approval in the Sutherland Shire?
Low walls that meet the exempt development conditions often are. Taller, boundary and foreshore walls usually need approval. We check before design starts.
Can you build retaining walls on rock?
Yes. Rock can make excavation slower, but walls founded properly on sandstone have excellent bearing.
What wall is best for a waterfront block?
Sandstone and engineered terraced walls suit most waterfront sites, with drainage and foreshore controls designed in from the start.
