The short answer
Airtasker says retaining wall installation ranges from $80 to $650 per square metre, with a median of $365. Material is the biggest driver, from boulder at $82 to $125 up to concrete at $353 to $555 and brick at $248 to $650.
Figures are Airtasker estimates from a page updated on 15 December 2023, so they may be out of date. Tall or structural walls can need council approval and an engineer, so check with your council.
Check these before you agree
- whether the wall needs council approval and an engineer
- drainage behind the wall
- who is responsible if the wall is on a boundary
- the height, length and footing
- removal of soil and old materials
Price ranges
Ranges, not quotes. Use them to judge whether a quote is in the right area.
| Job | Low | High | Checked |
|---|---|---|---|
| Boulder retaining wall | $82 | $125 per m² | 11 November 2026 |
| Block retaining wall | $98 | $152 per m² | 11 November 2026 |
| Stone veneer retaining wall | $151 | $252 per m² | 11 November 2026 |
| Sandstone retaining wall | $205 | $495 per m² | 11 November 2026 |
| Brick retaining wall | $248 | $650 per m² | 11 November 2026 |
| Timber sleeper retaining wall | $249 | $353 per m² | 11 November 2026 |
| Concrete retaining wall | $353 | $555 per m² | 11 November 2026 |
Source: Airtasker, retaining wall cost. Page updated 15 December 2023, checked by us on 11 November 2026.
Common questions
How much does a retaining wall cost per square metre?
Airtasker says $80 to $650, with a median of $365. Material changes the price a lot.
Sources
- Airtasker: retaining wall cost guide, checked 11 November 2026