Concrete Retaining Walls Adelaide — Costs, Council Approval & Options

Intro — Retaining walls are both structural and visual — concrete is the most durable option

Types of concrete retaining walls

• Poured-in-situ concrete walls
• Besser block / concrete masonry unit (CMU) walls
• Concrete sleeper retaining walls
• Comparison table (cost / lifespan / appearance / structural capacity)

When do you need council approval?

• SA Building Code: walls > 1 m generally require permits
• City by city variation (Mitcham, Gawler, Playford differences)
• Engineer certification: when required

Cost guide for Adelaide 2026

• Poured in-situ: $300–$600 per lineal metre (depends on height)
• Besser block: $200–$400 per lineal metre
• Concrete sleeper: $150–$300 per lineal metre

Adelaide's sloped lots — Mitcham, Stirling, Blackwood hillside homes

Drainage behind retaining walls — the step most DIYers miss (agricultural pipe, gravel fill)

CTA — Javed can quote retaining walls; BLD 317725 covers structural concrete

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