Retaining Wall Footing Cost 2026
Estimate retaining wall footing cost by linear feet, width, depth, yards, rebar, drainage, excavation, inspection, access, and contractor quote scope.
Retaining wall footing cost is easy to under-estimate because the concrete volume is only one part of the job. Excavation, rebar, drainage, wall height, soil, permits, inspection, access, and backfill can matter more than the ready-mix material line.
Use the Concrete Footing Calculator when the approved footing width, depth, and run length are known. For wall-level planning, see the Concrete Retaining Wall Cost Calculator Guide and Concrete Retaining Wall Contractor Quote Checklist.
Competitor calculator matrices such as ConcreteCalculatorMax's retaining wall calculator show the wall quantity intent. This page focuses on the footing quote.
Quick answer
A 40 ft retaining wall footing that is 18 inches wide and 10 inches deep needs about 2.04 yd3 with 10% waste. At $165 per yd3 plus a $125 delivery fee, the ready-mix material check is about $461.60 before excavation, rebar, drainage, forms, inspection, and labor.
| Footing run | Size | With 10% waste | Material check |
|---|---|---|---|
| 20 ft | 16 in x 8 in | 0.81 yd3 | $258.65 |
| 40 ft | 18 in x 10 in | 2.04 yd3 | $461.60 |
| 60 ft | 20 in x 10 in | 3.39 yd3 | $684.35 |
| 80 ft | 24 in x 12 in | 6.52 yd3 | $1,200.80 |
These are material planning examples, not retaining wall design advice.
Formula
cubic yards = length ft x width in x depth in / 144 / 27
order quantity = cubic yards x 1.10
material check = order quantity x price per yd3 + delivery fee
Measure the actual trench after excavation. Over-digging, loose trench sides, and uneven bottoms can increase volume.
Retaining wall footing quote checklist
| Quote line | Ask before approving |
|---|---|
| Approved dimensions | Width, depth, and reinforcement should match the wall design. |
| Excavation | Soil, slope, access, spoils, and trench cleanup. |
| Rebar | Bar size, spacing, dowels, chairs, and overlaps. |
| Drainage | Pipe, stone, fabric, weep holes, and outlet path. |
| Inspection | Permit, inspection timing, and responsibility. |
| Placement | Chute reach, pump, buggy, or wheelbarrow route. |
| Backfill | Whether backfill and compaction are included. |
If a wall quote is very low, confirm drainage and reinforcement first. Those missing lines can create expensive failures later.
When to avoid a simple calculator answer
Do not use a material-only footing estimate as a design decision when the wall holds back soil, supports a surcharge, sits near a structure, or requires a permit. The calculator is useful after the dimensions are approved.
FAQ
How do I estimate concrete for a retaining wall footing?
Multiply run length by footing width by footing depth, convert to cubic yards, then add waste. Use approved dimensions, not guesses.
Does footing cost include drainage?
Only if the quote says so. Drainage is often separate from the concrete material line and should be explicitly included.
Is retaining wall footing work a DIY job?
Small landscape walls may be simple, but structural retaining walls require proper design, drainage, and local code compliance.
Next step
Estimate the material in the Concrete Footing Calculator, then compare the full wall bid in the Concrete Quote Reviewer.
Quote planning next step
Turn this guide into a concrete buying check
Run the matching calculator, then compare ready-mix, bagged concrete, delivery fees, access needs, and quote gaps before you buy materials or approve a contractor number.