Free Retaining Wall Estimate Template
A complete, line-item retaining wall estimate you can preview below — excavation, compacted leveling base, segmental block, geogrid reinforcement, drainage stone and perforated pipe, backfill and caps — plus a plain-language checklist for wall height, drainage and when an engineer is required.
| Line item | Qty | Amount |
|---|---|---|
| Excavation & spoil haul-off | 60 lf | $1,320.00 |
| Compacted leveling base (6in) | 60 lf | $780.00 |
| Segmental block | 210 sq ft | $2,730.00 |
| Geogrid reinforcement (2 layers) | 1 lot | $640.00 |
| Drainage stone & 4in perforated pipe | 1 lot | $890.00 |
| Cap units & adhesive | 60 lf | $540.00 |
| Labor — hardscape crew | 40 hrs | $2,800.00 |
| Total | $9,700.00 | |
Payment schedule
How to measure and price retaining wall work
- Price block by wall face area (length x exposed height) and everything else by linear foot of wall.
- Excavation cost scales with the cut behind the wall, not the wall face — measure the working bench.
- Add an engineering allowance line whenever the wall approaches 4 ft or carries a surcharge.
Retaining Wall building-code guide
Retaining walls fail from water, not weight. Inspectors look at the base, the drainage path, the reinforcement, and whether the height triggers an engineered design.
- Most jurisdictions require a permit and stamped engineering for walls over 4 ft measured from the bottom of the footing
- Any wall supporting a surcharge — driveway, pool, slope or structure above — needs engineering regardless of height
- Terraced walls too close together behave as one tall wall; check the local spacing rule before quoting two short walls
- Compacted granular leveling pad, typically 6in thick and twice the block depth wide
- Bury the first course roughly 1in for every 8in of exposed wall height, minimum one full course
- Compact backfill in 6–8in lifts behind the wall with a plate compactor, never with the bucket
- 12in of clean drainage stone behind the block with a 4in perforated pipe daylighted or tied to a drain
- Separate the stone from native soil with filter fabric so fines do not clog the chimney drain
- Install geogrid at the elevations and embedment lengths the design calls for — cut short grid is the top cause of bulging
Drawings & details
Simplified section and plan views of the details inspectors look at most. Illustrative only — not to scale.
Adjust the values — the drawing below updates in real time.
- 1 · Depth below grade — Bury 1in per 8in of height(1.00")
- 2 · Footing width — 6in compacted leveling pad(6.00")
- 3 · Height above grade — Exposed wall height(3' 0")
- Depth below grade: 1.00" · Footing width: 6.00"
- Height above grade: 3' 0"
- Bury 1in per 8in of height
Adjust the values — the drawing below updates in real time.
- 1 · Segmental block — cap units set with adhesive(0.50")
- 2 · 12in clean drainage stone — full wall height(12.00")
- 3 · 4in perforated pipe — daylight or tie to drain(4.00")
- 4 · Compacted backfill — 6-8in lifts, plate compactor(8.00")
- Segmental block: 0.50"
- 12in clean drainage stone: 12.00"
- 4in perforated pipe: 4.00"
- Compacted backfill: 8.00"
- Total assembly: 24.50" (2' 0 8/16")
Code references are based on the 2021 IRC and related model codes. Local amendments, state codes and manufacturer instructions can be stricter — always confirm with your local building department before starting work.
Common retaining wall estimating mistakes
- Measuring only the exposed height and forgetting the buried course and leveling pad.
- Omitting drainage stone and pipe to win the bid — the wall bulges within two seasons.
- Not quoting spoil disposal; a 60 ft cut generates far more material than owners expect.
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Permit height thresholds, base and embedment rules, drainage detailing and geogrid placement.
Retaining Wall estimate FAQ
What should a retaining wall estimate include?
It should include excavation and spoil removal, the compacted leveling base, block by face area, geogrid, drainage stone and perforated pipe, filter fabric, caps and adhesive, labor, and an engineering allowance when the wall is tall or carries a surcharge.
When does a retaining wall need to be engineered?
Most jurisdictions require stamped engineering above 4 ft from the bottom of the footing, and at any height when the wall supports a driveway, structure, pool or a slope above it.
How much does a retaining wall cost per foot?
Segmental block walls commonly run $40–$80 per square foot of wall face installed, driven by height, access, geogrid requirements and how much excavation and drainage the site needs.
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