Retaining Wall Cost Calculator & Price Guide
A retaining wall cost in Australia can vary a lot depending on the material you choose and the wall height. Using the current retaining wall price guide, costs start from treated pine sleepers at $280 per lm and go up to natural stone or sandstone at $750 per lm, before height adjustments and the minimum $2500 AUD job charge are applied.
Estimate retaining wall installation cost
Supply-and-install midpoints for Australia. Rates include excavation, footings, backfill and compaction. Walls over 1 m may require council approval — check with your local authority.
Set to 0 to exclude.
- Treated pine sleepers (1–1.2 m):
- $4,200
Estimates are indicative only. For an accurate price, get free quotes from local tradies above.
Retaining Wall Price Breakdown
Typical job based on 15 lm. Prices are supply-and-install midpoints — actual quotes will vary.
| Type | Cost per lm | Typical 15 lm job |
|---|---|---|
| Treated pine sleepers | $280 | $4,200 |
| Hardwood sleepers | $420 | $6,300 |
| Concrete sleepers | $450 | $6,750 |
| Besser block / masonry | $650 | $9,750 |
| Natural stone / sandstone | $750 | $11,250 |
What Affects Retaining Wall Cost?
- Wall material: Material is one of the biggest drivers of retaining wall installation cost. Rates range from $280 per lm for treated pine sleepers to $750 per lm for natural stone or sandstone, with concrete sleepers at $450 per lm and besser block or masonry at $650 per lm.
- Wall height: Height changes the total cost to build retaining wall because taller walls need more structure and labour. The pricing uses a multiplier of 0.7 for walls up to 0.8 m, 1 for 1–1.2 m walls, and 1.6 for walls of 1.5 m or more.
- Wall length: This calculator works on a per lineal metre basis, so a longer wall means a higher total retaining wall cost. A typical example uses 15 lm, but the same per-lm rates scale up or down depending on your project length.
- Minimum job charge: Smaller projects can still be affected by the minimum job charge of $2500 AUD. If the calculated amount comes in below that threshold, the estimate is lifted to the minimum instead.
Retaining Wall Cost - Frequently Asked Questions
For a typical 15 lm wall at 1–1.2 m high, the midpoint cost starts at $4200 AUD for treated pine sleepers and can reach $11250 AUD for natural stone or sandstone. With the displayed estimate range set at ±20%, that works out to about $3360–$5040 AUD at the low end and $9000–$13500 AUD at the high end. The final retaining wall cost depends on the material and height category you select.
Concrete sleeper retaining wall cost per metre is $450 per lm at the standard 1–1.2 m height setting. For walls up to 0.8 m, the 0.7 multiplier brings the midpoint to $315 per lm, while walls 1.5 m and over increase to $720 per lm using the 1.6 multiplier. Very small jobs may still be priced at the $2500 AUD minimum.
If you are comparing a concrete retaining wall cost, concrete sleepers are priced at $450 per lm and besser block or masonry is $650 per lm before range adjustments. For a 15 lm wall at 1–1.2 m high, that gives midpoint totals of $6750 AUD for concrete sleepers and $9750 AUD for besser block or masonry. The displayed estimate range is ±20% around those figures.
Timber retaining wall cost is usually the most budget-friendly in this guide, with treated pine sleepers at $280 per lm and hardwood sleepers at $420 per lm for a 1–1.2 m wall. On a 15 lm job, that equals midpoint totals of $4200 AUD and $6300 AUD respectively. Lower walls may reduce the calculated amount, but the $2500 AUD minimum charge can apply to smaller jobs.
Sandstone retaining wall cost and stone retaining wall cost are priced at $750 per lm for natural stone or sandstone at the standard 1–1.2 m height. For a typical 15 lm project, that gives a midpoint of $11250 AUD, with a displayed range of approximately $9000–$13500 AUD. Taller walls at 1.5 m or more are costed higher using the 1.6 multiplier.
The biggest factors are material, wall height and total length, all of which directly change the retaining wall price. For example, a 15 lm treated pine wall at 1–1.2 m is $4200 AUD at midpoint, while the same length in natural stone or sandstone is $11250 AUD. Height also matters, with multipliers of 0.7 for up to 0.8 m, 1 for 1–1.2 m, and 1.6 for 1.5 m and above.