Retaining Wall Materials for a 30' × 3' Wall

A 30-foot wall 3 ft high is 90 sq ft of face — about 135 standard 16×6" blocks plus caps and base gravel. Pick a different block size, a custom block, or poured/timber/stone above.

You'll need

135 blocks

Wall area

90 sq ft30' long × 3' high

Wall blocks

13516" long × 6" high × 10" deep

Cap blocks

23~16" units

Gravel base / backfill

1.5 tons6"-deep leveling base + drainage backfill

Block cost (est.)

$675~$5/block material

Planning estimate. Adjust allowances and sample prices for your supplier; tax, delivery, and labor are not included.

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Retaining Wall Materials for a 30' × 3' Wall

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