How much retaining wall for a 50 ft long × 4 ft high?

A 50 ft long × 4 ft high retaining wall project is pre-filled below. Adjust any value to match your exact job.

Quick answerA 50 ft long × 4 ft high retaining wall project needs 400 blocks — buy 420 to cover waste — about $1,050–$3,360 in materials (US national average, 2026).

Your project

Standard size shown by default. Change any value — the answer recomputes instantly.

You need

420blocks

Exact need: 400 blocks · plus 5% waste allowance

Material cost

$1,050–$3,360

Installed (US avg)

$5,300–$9,110

Shopping list

Items to buy with quantity and price range
ITEM	QTY	PRICE RANGE
blocks	420	$1,050–$3,360
Estimated material total		$1,050–$3,360

Companion materials

Gravel base (6 in): ≈ 1.32 tons

Other sizes

10 ft long × 2 ft high
20 ft long × 3 ft high
30 ft long × 3 ft high
40 ft long × 4 ft high
20 ft long × 4 ft high
Custom size →