Retaining Wall Cost Calculator — Estimate by Material & Size

Quick Answer: A retaining wall costs $15–$50 per wall face square foot installed. Timber runs $8/sq ft material, concrete block $12/sq ft, poured concrete $15/sq ft, and natural stone $20/sq ft. A typical 4 ft × 30 ft wall (120 sq ft face) costs $3,500–$9,000 total. Labor runs $6–$13/sq ft based on brickmason rates of $24–$34/hr nationally. Add $1,650 for excavation, drainage, geogrid, backfill, and permits. Enter your ZIP for local pricing.

Calculate how much a retaining wall costs. Choose your wall material, enter height, length, and ZIP code to get a location-specific estimate with a full cost breakdown.

Retaining Wall Cost by Material

Material	Material $/sq ft	Total $/sq ft	4' × 30' Wall
Timber	$8/sq ft	$15–$22/sq ft	$3,500–$5,000
Concrete Block	$12/sq ft	$20–$32/sq ft	$4,500–$6,500
Poured Concrete	$15/sq ft	$25–$38/sq ft	$5,500–$7,500
Natural Stone	$20/sq ft	$35–$50/sq ft	$6,500–$9,000

How Retaining Wall Cost Is Calculated

Total = (Material + Labor + Fixed Costs) × 1.20 markup

Wall material: Wall face area (height × length) × $8–$20/sq ft depending on material. Includes blocks, mortar, timber, stone, or concrete as applicable.
Labor: Wall face area × 0.15–0.30 hr/sq ft × hourly brickmason rate × 1.5 burden. Natural stone is the most labor-intensive (0.30 hr/sq ft) due to fitting irregular pieces.
Fixed costs: Excavation ($500), drainage gravel and pipe ($400), geogrid ($200), backfill ($300), and permits ($250) totaling $1,650.
Contractor markup: 20% for general contractor overhead, profit, and warranty.

Retaining Wall Material Comparison

Timber: Most affordable option. Pressure-treated 6×6 lumber stacked horizontally. Easy DIY for walls under 3 ft. Lifespan 15–20 years. Not ideal for walls over 4 ft or wet conditions.
Concrete Block: Best value for most projects. Interlocking segmental retaining wall (SRW) blocks are engineered for structural stability. No mortar needed for walls under 4 ft. Lifespan 50–100 years.
Poured Concrete: Strongest option for tall walls and heavy loads. Requires forms, rebar, and curing time. Best for walls over 4 ft or those supporting driveways and structures. Lifespan 50–100+ years.
Natural Stone: Premium appearance with each wall unique. Fieldstone, limestone, or granite. Most labor-intensive to install. Best for decorative garden walls and high-end landscaping. Lifespan 100+ years.

Formula Summary

Retaining Wall Cost Formula: Total installed cost includes wall materials, burdened masonry labor, and fixed costs for excavation and drainage, multiplied by contractor markup.

Total = (A × M + A × H × R × 1.5 + F) × 1.20

where A = wall face area (height × length in sq ft), M = material cost/sq ft, H = labor hours/sq ft, R = hourly brickmason rate, 1.5 = labor burden, F = fixed costs ($1,650), 1.20 = markup.

Material	Material $/sq ft	Hr/sq ft
Timber	$8	0.15
Concrete Block	$12	0.20
Poured Concrete	$15	0.25
Natural Stone	$20	0.30

Constants: Fixed costs $1,650 (excavation $500, drainage $400, geogrid $200, backfill $300, permits $250). Labor burden 1.5×. Contractor markup 20%. Trade: brickmasons (SOC 47-2021), national mean $28.16/hr. Rates from BLS OEWS May 2024, 393 metros.

Brickmasons Hourly Rates by Metro (BLS OEWS May 2024)

Metro	25th %ile	Mean	75th %ile
New York	$30.48	$40.56	$48.60
Los Angeles	$23.65	$32.84	$38.67
Chicago	$29.44	$40.91	$50.88
Dallas	$22.47	$25.43	$28.76
Houston	$21.82	$24.50	$27.90
Washington	$28.09	$29.57	$30.82
Philadelphia	$28.48	$38.14	$46.48
Miami	$18.77	$27.28	$31.11
Atlanta	$18.36	$32.87	$42.86
Phoenix	$23.55	$28.83	$34.76

Need Block Quantities?

Use Our Concrete Block Calculator →

Calculate exact block count, mortar, and rebar for your retaining wall.

Related Calculators

Concrete Calculator — calculate concrete volume for poured walls and footings
Brick Calculator — estimate bricks for wall construction
Concrete Block Calculator — calculate blocks needed for retaining walls
Landscaping Cost Calculator — estimate full landscaping project costs

Estimates are for planning purposes only. Consult a qualified contractor for critical projects. Actual material requirements may vary based on site conditions, waste, and installation methods.

Pricing last verified: February 2026. Material prices vary by region, season, and supplier. Prices shown are national averages for planning purposes.

Frequently Asked Questions

How much does a retaining wall cost per linear foot?▾

A retaining wall costs $20–$60 per linear foot for a 3–4 ft tall wall, depending on material. Timber walls run $15–$30/linear ft, concrete block $25–$45/linear ft, poured concrete $30–$55/linear ft, and natural stone $40–$80/linear ft. Costs increase significantly with height — a 6 ft wall costs 2–3 times more per linear foot than a 3 ft wall due to engineering, drainage, and material requirements.

Do I need a permit for a retaining wall?▾

Most jurisdictions require a permit for retaining walls over 4 feet tall (measured from the bottom of the footing to the top of the wall). Some areas require permits for walls over 3 feet. Walls over 4 feet typically also require engineered drawings ($500–$1,500). Permit costs range from $100–$500. Check with your local building department — unpermitted walls can cause liability issues and problems when selling your home.

How long do retaining walls last?▾

Retaining wall lifespan depends on the material: timber walls last 15–20 years, concrete block walls 50–100 years, poured concrete 50–100+ years, and natural stone 100+ years. Proper drainage is the single most important factor — walls without adequate drainage fail 3–5 times faster. A well-built concrete block retaining wall with proper drainage gravel and weep holes can last the lifetime of the property.

Can I build a retaining wall myself?▾

DIY is feasible for walls under 3 feet tall using timber or interlocking concrete blocks. These materials are designed for stacking without mortar and cost $8–$15/sq ft for materials alone, saving 40–60% over hiring a contractor. Walls over 4 feet should always be professionally built — they require proper footing design, geogrid reinforcement, engineered drainage, and often a building permit with inspections.

Does a retaining wall need drainage?▾

Yes, drainage is essential for any retaining wall. Water pressure (hydrostatic pressure) behind the wall is the number one cause of failure. Every retaining wall needs: 12 inches of drainage gravel behind the wall, a perforated drain pipe at the base, filter fabric between gravel and soil, and weep holes every 6–8 feet. Our calculator includes $400 for drainage materials in the fixed cost estimate.

When is a structural engineer required for a retaining wall?▾

A structural engineer is required for walls over 4 feet in most jurisdictions, walls with surcharges (driveways, structures, or slopes above), walls on hillsides or unstable soil, tiered wall systems, and walls near property lines or utilities. Engineering fees run $500–$1,500 and include soil analysis, footing design, and reinforcement specifications. The cost is well worth it — a failed retaining wall costs $10,000–$50,000+ to repair.