Retaining wall engineering fees in Australia typically start from $500 AUD and scale with wall height and site complexity. Construction (build) cost is separate and usually larger, varying by wall type, length and site access.
Retaining wall cost has two separate components that are easy to confuse: the structural engineering fee, and the construction (build) cost. This guide focuses mainly on the engineering side, which is what we quote directly.
Engineering fees
Engineering fees generally start from $500 AUD and scale with wall height, since taller walls require more complex calculations and documentation. See our Pricing page for details, or request a fixed-fee quote for your specific project.
What drives construction cost
Wall type (timber is typically cheapest, engineered block/concrete systems cost more), wall length and height, site access, and how much excavation and drainage work is required all affect the build cost — which is separate from and usually larger than the engineering fee.
Don't skip the engineering to save money
A cheap, non-compliant wall that fails can cost many times more to fix than getting the engineering right from the start — and you may have no recourse if something goes wrong with an uncertified wall.