How much does a retaining wall cost?
Retaining walls typically cost $250–$700 per m² of wall face in Australia, with most residential walls landing between $5,000 and $9,500.
Typical price band
$7,000typical
standard job $5k–$9.5k
$1,500 low$25,000 high
Get a personal estimate
Answer a few quick questions to narrow the range.
Real-world examples
Low timber garden wall$1,500 – $3,500
Concrete sleeper wall$5,000 – $9,500
Engineered wall over 1 metre$12,000 – $25,000
What affects the price
— Wall face area. Length times height is the core quantity — taller walls also need heavier posts and footings.
— Material. Treated timber is cheapest but has the shortest life; concrete sleepers and masonry cost more and last decades.
— Engineering & approvals. Walls above roughly 1 m usually need an engineer's design and council sign-off, adding $1,500–$4,000.
— Drainage & backfill. Ag-pipe, gravel backfill and stormwater connection are essential and add real cost.
— Access & excavation. Machine access keeps digging cheap; hand excavation on tight sites multiplies labour.
Tips before you post
— Check your council's height threshold before designing — approval requirements kick in at 0.5 m in some areas.
— Never skip the drainage behind the wall; water pressure is what destroys retaining walls.
— Concrete sleepers cost more than timber upfront but usually work out cheaper over the life of the wall.
Beyond the price: Building a retaining wall: getting the engineering right the first time
Read the guide →Find retaining walls near you
Ready to get quotes?
Post your job for free and hear from local tradies.
Indicative range only, not a quote. Get quotes from local tradies for an exact price. Last updated 13 July 2026.
Connecting homeowners with trusted local tradies. Made in Sydney.
Company
Support
© 2026 QuickQuote. All rights reserved.