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SERVICE 08 · SYDNEY-WIDE

Retaining Walls in Sydney

Concrete sleeper, block or sandstone — built off engineer’s drawings with real drainage behind them, so they’re still straight in twenty years.

Get a retaining walls quoteCall 452 353 333
Professional retaining wall installation using reinforced masonry blocks in Sydney, NSW.
Price this job in 24 hours
Free site visit, fixed quote. No per-hour surprises.
Or text photos of the site to 452 353 333
✓ NSW Lic. 000000C✓ $20M insured✓ 4.9★ (180+)
✓Licensed & insuredNSW Lic. 000000C
$20MPublic liabilityCertificates on request
15+Years in Sydney2,400+ jobs completed
24hQuote turnaroundFixed price, no surprises

Why Choose Ouss Civil for Retaining Walls in Sydney

A retaining wall in NSW is a structure, not a garden feature — anything over 600 mm generally needs approval, and AS 4678 governs how it’s designed and drained. Most failed walls in Sydney didn’t fail from load; they failed from water nobody planned for.

We build off the engineer’s drawings, pier the footings with the 13T CAT’s auger where the design calls for it, and put ag-line, gravel and weep holes behind every wall as standard — because the drainage is the wall. You get compliance certification at completion, not a handshake.

✓Engineer-designed and certified — compliance paperwork issued at completion✓13T auger rig for piered footings; sleeper, block and sandstone systems built to spec✓AS 4678 design standards, with council approval guidance for walls over 600 mm✓Ag-line, gravel and weep-hole drainage behind every wall — still straight in twenty years
Custom retaining wall construction services for homes and commercial developments in Sydney.

What’s included

Engineer-designed retaining walls
Concrete sleeper and block systems
Sandstone and boulder walls
Ag-line and gravel drainage behind every wall
Footings and piering included
Compliance certification on completion

How it runs

1Send the job throughPhotos, plans or a rough description — whatever you’ve got. Same-day callback.
2Free site visit, fixed quoteWe walk the site, probe where needed, and the fixed number lands within 24 hours.
3Machines on siteBooked date, machines arrive at 7am. You get the foreman’s mobile, not a call centre.
4Done, clean, documentedLevels checked, street swept, dockets and certificates handed over with the invoice.

Cost guidance AUD · INC. GST · FIXED AFTER SITE VISIT

Concrete sleeper wall (per m² face)$450 – $750
Engineered block wall (per m² face)$600 – $950

Ranges cover the middle 80% of jobs we priced in the last 12 months. Rock, access and tipping distance move the number — the free site visit pins it down.

Recent retaining walls jobs

Full gallery →
Retaining Walls jobRetaining Walls jobRetaining Walls job

Often booked with

Walls almost always follow a cut or lead into landscaping:

03ExcavationBulk and detailed cuts to exact levels, tight-access included.See our Excavation services →09LandscapingFinal levels, drainage, turf prep and finishing touches.See our Landscaping services →
SERVICE AREAS
Retaining Walls available across Eastern Suburbs, Inner West, Northern Beaches, North Shore, Hills District, South West Sydney, Western Sydney and Sydney CBD — plus every suburb in between →

Retaining Walls FAQs

In NSW, walls over 600 mm generally need approval; under that, exempt development usually applies. We build to the engineer’s design either way and supply the certification.

Ready to price your retaining walls job?

Same 24-hour promise — or call 452 353 333

Tell us about the job.

Price back within 24 hours — or we’ll tell you straight if it’s not our kind of work.

Get a quote 452 353 333