In WA, retaining walls over 0.5m need a building permit — the lowest threshold in Australia. Full details in our WA council approval guide.
What You Need
- Structural engineering plans
- Site plans
- Building permit application
- Fees: $300–$1,000+
Licensed residential builders handle this regularly. Get quotes from builders who manage the full approval process.
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Our free service connects Perth homeowners with WA Building Commission licensed retaining wall builders. Get free, no-obligation quotes — it’s fast, free, and there’s zero obligation.