Quick Answer
Building a retaining wall typically requires a mini excavator for footing excavation and backfilling, and a mini dumper for moving aggregate and material.
Building a retaining wall involves several earthmoving tasks that are best completed with a mini excavator and mini dumper. The process typically involves: (1) excavating the footing trench to the required depth and width, (2) placing and compacting the footing material, (3) constructing the wall, and (4) backfilling behind the wall with drainage aggregate. For a standard residential retaining wall (up to 1.5m high), the 1T or 1.7T mini excavator is ideal for footing excavation and backfilling. The mini dumper is used to transport drainage aggregate and backfill material efficiently. For larger retaining walls (above 1.5m), a 3.5T excavator provides more reach and bucket capacity. Retaining walls above 1m in NSW typically require a development application (DA) and must be designed by a structural engineer.
Retaining walls above 1m in height typically require a development application (DA) from your local council in NSW.
For standard residential retaining walls (up to 1.5m), the 1T or 1.7T mini excavator is ideal. For larger walls, the 3.5T provides more reach and capacity.
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