A retaining wall costs $35 to $65 per square foot of wall face installed, per HomeGuide.1 HomeAdvisor and Angi project data – sister brands sharing one dataset, so one estimate – puts a typical project at $6,082 to $6,083, with most paying $3,191 to $9,206.2,3 Materials alone range from $15 per square foot for segmental block to $150 for anchored walls.1*
$35 – $65
per sq ft of wall face
$6,082
typical project, HA/Angi
$3,191 – $9,206
typical range
Quick math: wall face = length x height. A 25 ft long, 4 ft high wall is 100 square feet – $3,500 to $6,500 at HomeGuide’s installed range. Our multiplication; taller walls need engineering and drainage that push the per-foot price up, not down.
Published prices at a glance
Three references, all fetched and read October 2026 (HomeAdvisor and Angi share one project dataset):
| Measure | HomeGuide1 | HomeAdvisor2 | Angi3 |
|---|---|---|---|
| Installed per sq ft | $35 – $65 | – | – |
| Average project | – | $6,082 ($3,191 – $9,206) | $6,083 (same data) |
| Labor per sq ft | – | $15 – $50 (or $50 – $75/hr) | $15 – $50 (or $50 – $75/hr) |
| Waterproofing | – | – | $2 – $10 per sq ft |
| Rebar reinforcement | $1.50 – $2.50 per sq ft | – | – |
| Land grading | $0.40 – $2.00 per sq ft | – | – |
Cost by material
Per-square-foot material prices across the two guides – where they disagree, both numbers stand:
The wide stone and gabion ranges reflect everything from cheap wire-basket riprap to stacked limestone – get the specific material quoted.
Three worked examples (we did the math)
| Wall | Face area | At $35 – $65/sq ft installed | At segmental $15 – $35/sq ft |
|---|---|---|---|
| Garden wall 10 ft x 3 ft | 30 sq ft | $1,050 – $1,950 | $450 – $1,050 |
| Mid wall 25 ft x 4 ft | 100 sq ft | $3,500 – $6,500 | $1,500 – $3,500 |
| Large wall 40 ft x 6 ft | 240 sq ft | $8,400 – $15,600 | $3,600 – $8,400 |
The large-wall math lands inside the HomeAdvisor/Angi project range, which is reassuring – but walls over 4 feet typically need engineering and permits, and HomeGuide notes taller walls cost more per linear foot, so treat the top of that row as a floor, not a ceiling.1,2
What else to budget for
Drainage: every wall needs it – perforated pipe, gravel backfill and weep holes per HomeGuide.1 See our French drain cost guide and gravel for a retaining wall for the backfill math.
Delivery: $30 to $100 per truckload of block or stone per Angi.3
Footings for tall walls: $18 to $55 per linear foot; cap stones $5 to $15 each; decorative veneer $5 to $25 per sq ft.1
DIY savings: $15 to $50 per sq ft in labor per Angi – but drainage and structural mistakes are why walls lean, so DIY only short, low-load walls.3
Related guides and tools
Retaining wall block calculator | How much gravel for a retaining wall | French drain cost | Decomposed granite cost
FAQ
How much does a retaining wall cost per square foot? $35 to $65 installed per HomeGuide; material-only ranges run $15 to $150 depending on type.1
What is the cheapest retaining wall? Segmental concrete block at $15 to $35 per sq ft material per HomeGuide, or gabion baskets at the low end of HomeAdvisor’s $10 to $100 stone range.1,2
Do retaining walls need drainage? Yes – both guides stress drainage (pipe, gravel backfill, weep holes) to stop hydrostatic pressure from pushing the wall over.1,3
Does a retaining wall add home value? Angi cites an average 100% to 200% return, adding up to 15% to home value – treat that as their claim, not a guarantee.3
Sources
- HomeGuide – Retaining Wall Cost
- HomeAdvisor – Cost to Build a Retaining Wall
- Angi – How Much Does It Cost to Build a Retaining Wall?
*Prices are 2025-2026 national averages from the cited sources and vary by material, wall height, access and region. Walls over 4 feet usually need engineering and permits.