Work through the key steps before you build, repair or replace a retaining wall on the Gold Coast.
Tick each item to open the project review form.
The contractor needs accurate dimensions to estimate materials and labour.
Walls within 1.5 m of a building or boundary usually need approval and engineering.
Driveways, pools, fences or structures above the wall trigger compliance requirements (surcharge means an extra load above the wall).
Sandy, clay or hinterland soils affect footing design and drainage.
Retaining walls must not be built over sewer, stormwater or within easements.
Timber, concrete, block, stone and gabion (rock-filled wire cages) each suit different budgets and lifespans.
Approval thresholds depend on height, proximity, surcharge (extra load above the wall) and setback.
A written quote protects both parties and lists scope, inclusions and exclusions.
Engineered walls may need an RPEQ (Registered Professional Engineer of Queensland) design and building approval. Form 15 is the compliance certificate for a building design or specification; the certifier sets the inspection requirements.
Drainage must suit the wall system, soil and approved design; poor drainage is a common cause of wall failure.
Tight access increases labour and equipment costs.
Verify the contractor holds a current QBCC licence and appropriate insurance.
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