How tall can a timber sleeper retaining wall be before you need council approval or an engineer? Thresholds by state, plus the practical height limit for treated pine.
Posts first, then sleepers, then drainage, then backfill — the order that makes or breaks a DIY timber sleeper retaining wall, step by step.
Everything you need to plan a timber sleeper retaining wall — treated pine sizing, steel post spacing, drainage and Australian height limits, in one guide.
