Quick Answer
Retaining wall footings are typically excavated 300–600mm deep depending on wall height and soil conditions. The 0.8T or 1T mini excavator is ideal for residential retaining wall footing work.
Retaining wall footing depth depends on wall height, wall type, and soil conditions. As a general guide: for timber sleeper retaining walls up to 600mm high, footings are typically 300–400mm deep. For concrete block walls up to 1,200mm high, footings are typically 400–600mm deep. For walls above 1,200mm, an engineer's specification is required and footings may be 600–900mm or deeper. The 0.8T or 1T mini excavator is ideal for residential retaining wall footing excavation — compact enough to work in established gardens, precise enough to dig to the required depth and width. For longer retaining walls or walls on sloped sites, the 1.7T excavator is more efficient. In NSW, retaining walls above 600mm typically require council approval. Walls above 1,000mm require an engineer's design and certification.
In most NSW councils, retaining walls above 600mm require development consent or complying development certification. Check with your local council.
The 0.8T or 1T mini excavator is ideal for residential retaining wall footings — compact, precise, and able to work in established gardens.
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