Retaining Wall Cost Calculator
Segmental block, timber, or boulder walls from length × height, material tier, and drainage/backfill assumptions.
Your project
Wall length (ft)
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Length
Horizontal run of the wall face. |
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Wall height (ft)
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Height
Height at the tallest point — tiered walls may need segment estimates. |
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Wall type
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Material
Segmental block is common; timber and boulder walls price differently. |
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Drainage package
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Drainage
French drain and export fill behind the wall drive cost on tall walls. |
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Your state
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Your state
Scales midpoints for typical state-level labor and material costs versus the U.S. average. Not a local contractor bid. |
How to use this calculator
- Enter wall length and exposed height.
- Choose wall type and drainage package.
- Select your state.
Results explained
Face area is length × height. Engineering, permits, and geo-grid on tall walls may exceed these midpoints.
Quick reference: retaining walls
| Block wall | Per sq ft face |
|---|---|
| Segmental block | $28.50 |
| Enhanced drainage | +$6.85 |
| Boulder wall | $38.25 |
How the estimate is built
Material rate × face area plus drainage per sq ft of face, state scaled.
Example scenario
32×4 ft block wall with enhanced drainage (128 sq ft face) ≈ $4,524 at U.S. average.
FAQ
How tall before engineering?
Many locales require engineered plans above 4 ft — not included here.
Terraced tiers?
Model each tier separately or combine face areas.
Excavation export?
Haul-off is partially reflected in drainage tiers; massive cuts may cost more.