How much does it cost to do a concrete retaining wall?
Nationally, retaining walls average $35 to $65 per square foot with materials and professional labor (2026), and by material, poured concrete comes in at $20 to $45 per square foot and concrete block at $15 to $40 in the same figures. Most retaining wall contractors also set a project minimum of $1,500 to $3,000.
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Why taller walls cost more
In Waco, a retaining wall 48 inches tall or less needs no permit. A taller one must be designed by an engineer and needs a Foundation permit, and national engineering fees for walls 4 feet or higher run $500 to $2,000 or more (2026). A California contractor quoted in a published guide adds that a wall over 4 feet has to be poured in two phases, footings and then the wall, which raises labor costs. These are published averages, not a quote.
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