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Location – Labor costs are typically higher in metropolitan areas. Building codes often require rebar to strengthen a wall against earthquakes.
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Reinforcements – Adding steel rebar costs $2.50 to $5.00+ per square foot extra. Tree removal costs $300 to $700 per tree.Įxcavation – Removing old retaining walls and dirt costs $125 to $225 per cubic yard, including disposal.įoundation – Concrete footings cost $18 to $55 per linear foot, depending on the wall type, size, depth, and soil conditions. Land grading costs $0.40 to $2.00 per square foot. Land clearing costs $1,500 to $3,000 per acre for difficult terrain. Size – Taller, longer, and thicker walls need stronger foundations and additional reinforcements than basic garden walls.ĭesign – Complex walls with curves, steps, openings, and other designs increase labor time. The cost to install a retaining wall depends on site conditions and many other cost factors: Requires space for installation with heavy machinery Galvanized or vinyl-coated steel types for wet climates and coastal areas Sheet-pile walls are the thinnest wall type, made of steel, and have concrete or wood caps on top. A sheet-piling retaining wall costs $15 to $50 per square foot installed.