How Much Does a Retaining Wall Cost in Perth?
Updated October 2026
Published Perth guides put installed retaining walls at roughly $250 to $650 per square metre of wall face, depending on material, height and access. A 20 m wall at 1 m high (20 m²) works out around $5,000 to $13,000. Drainage, footings and removing an old wall can move the price, so get a measured quote.
Published Perth prices (October 2026)
Prices below come from public Perth price guides. They're not our prices and they don't agree with each other perfectly, which is normal: every block is different. Use them to set a budget, then get a fixed price from a measure.
| Wall type | Published price range | Source |
|---|---|---|
| Limestone retaining wall, supply and install | $250–$350 per m² | Perth Retaining Walls blog, July 2025 |
| Limestone blocks | $450–$650 per m² | BODA Building Group guide, January 2026 |
| Concrete sleepers | $400–$700 per m² | BODA Building Group guide, January 2026 |
| 1 m high limestone block wall | $295–$630 per lineal metre | Landscapes for Life Perth guide, October 2026 |
| Retaining walls in general | $150–$600 per m² | Builder Connect Perth guide |
A worked example
Say you need a wall 20 metres long and 1 metre high. That's 20 square metres of wall face.
- At the low end of the published limestone range ($250/m²): about $5,000
- At the top of the published block and sleeper ranges ($650/m²): about $13,000
- Using the per-lineal-metre figure for a 1 m limestone wall ($295–$630/m): about $5,900 to $12,600
That's rough maths from published numbers, not a quote.
What moves the price
- Height. Taller walls need deeper footings and more material, and past 500 mm many councils want a building permit and sometimes engineering.
- Footing depth. In loose sand footings may need to go deeper than they look like they need. Hitting the limestone shelf can mean coring.
- Drainage. Ag drain, clean aggregate backfill and an outlet. It costs money and it's what stops a wall failing. A quote that leaves it out is quoting a different job.
- Access. Narrow side paths and steep blocks mean more hand work.
- The old wall. Demolition and spoil removal add cost. We include them in the quote rather than billing them after.
- A fence on top. Usually quoted with the wall as one job. See retaining wall with a fence on top.
How to get a real number
Tell us roughly how long and how high the wall is, whether there's an old wall to come out, and whether a fence is going on top. We'll come out, measure it properly and give you one fixed price in writing with a start date, free.
Questions
Is limestone cheaper than sleepers?
The published ranges overlap a lot ($250–$650/m² for limestone vs $400–$700/m² for sleepers in the guides above). Height, access and drainage usually matter more than the material.
Does the price include drainage?
Ours does. Always check that any quote includes the ag drain and backfill. It's the part that decides how long the wall lasts.
Do I pay for engineering?
Only where the height or the council requires it. We tell you at the measure if your wall needs it.
Get a free quote
Leave your name, phone and email and we'll call you back to book a free on-site measure. You'll get one fixed price in writing.
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