Retaining Wall cost breakdown
At a mid-range, national-average baseline, a typical retaining wall project is estimated at $2,000 to $6,000. The table below breaks the cost down so you can see where your project is likely to land.
| Material | Installed cost per sq ft | Typical total (100 sq ft) |
|---|---|---|
| Timber | $12 to $30 /sq ft | About $1,200 to $3,000 |
| Concrete block | $20 to $50 /sq ft | About $2,000 to $5,000 |
| Poured concrete | $25 to $60 /sq ft | About $2,500 to $6,000 |
| Brick | $28 to $65 /sq ft | About $2,800 to $6,500 |
| Natural stone | $35 to $90 /sq ft | About $3,500 to $9,000 |
Retaining Wall cost by project size
Most of your retaining wall cost scales with size. Here is the estimated national-average range at a few common project sizes.
| Wall face area (square feet) | Estimated total cost | Scale |
|---|---|---|
| 50 square feet of wall face | $1,000 to $3,000 | Smaller project |
| 100 square feet of wall face | $2,000 to $6,000 | Typical project |
| 180 square feet of wall face | $3,600 to $10,800 | Larger project |
What drives retaining wall cost
- Wall size (height and length, measured as face area).
- Material: timber is cheapest, natural stone the most expensive.
- Height: tall walls need engineering, reinforcement, and drainage.
- Drainage, backfill, and base preparation.
- Site slope and access for equipment.
- Regional labor rates and permits.
Key cost factors
Height changes everything
Short walls under about 4 feet are straightforward. Taller walls hold back much more soil and usually require engineering, reinforcement, and drainage systems, which raise the cost per square foot.
Drainage is essential
Water pressure behind a wall is what makes it fail. Proper gravel backfill and drainage pipe add cost but are what make the wall last.
Material and look
Timber and block are budget-friendly. Poured concrete is strong and clean. Natural stone is the premium look and the most labor-intensive.