How many blocks for a retaining wall?

Divide the wall face area (length × height) by the face area of one block — typically about 0.5 sq ft for a standard block.

Do retaining walls need a permit?

Many municipalities require a permit and engineering for walls over 3 to 4 feet. Check local bylaws before you start.

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Blocks needed for a retaining wall.

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How many blocks for a retaining wall?: Divide the wall face area (length × height) by the face area of one block — typically about 0.5 sq ft for a standard block.
Do retaining walls need a permit?: Many municipalities require a permit and engineering for walls over 3 to 4 feet. Check local bylaws before you start.