Retaining Wall Cost Calculator
Last updated: October 15, 2026
Estimate a retaining-wall project cost from wall area, material, excavation, drainage, engineering and contingency.
Starting figures illustrate this model. Enter your own measurements, quoted costs and applicable terms; this page does not retrieve live prices or provider rates.
Estimated retaining-wall project cost
—
- Installed wall estimate: —
- Site, drainage and engineering costs: —
- Estimated contingency: —
- Estimated cost per square foot: —
On this page
Quick summary: Estimate a retaining-wall project cost from wall area, material, excavation, drainage, engineering and contingency.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate a retaining-wall project cost from wall area, material, excavation, drainage, engineering and contingency.
How to use it
Enter Wall face area (square feet); Installed wall cost per square foot ($); Excavation and access cost ($); Drainage and backfill cost ($); Engineering and permit cost ($); Contingency (%). Select Calculate to update the results.
How the calculation works
Wall area is multiplied by the installed unit cost, then excavation, drainage, engineering and contingency are added.
Worked example: starting scenario
| Wall face area (square feet) | 480 |
|---|---|
| Installed wall cost per square foot ($) | 65 |
| Excavation and access cost ($) | 6500 |
| Drainage and backfill cost ($) | 4200 |
| Engineering and permit cost ($) | 3200 |
| Contingency (%) | 10 |
| Estimated retaining-wall project cost | $49,610.00 |
|---|---|
| Installed wall estimate | $31,200.00 |
| Site, drainage and engineering costs | $13,900.00 |
| Estimated contingency | $4,510.00 |
| Estimated cost per square foot | $103.35 |
Important limitations
Soil, slope, height, access, drainage, geotechnical requirements, materials, permits and structural design vary.