Codes, permits & inspection
Sourced answers on codes, permits & inspection, written for the person standing in front of the problem.
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1
What is the standard size of a concrete block?
A standard block is 8x8x16 in nominal and 7-5/8 x 7-5/8 x 15-5/8 in actual. The 3/8 in difference is the mortar joint. Size table plus wall layout math.
2Do you need a permit to lay concrete?
Sometimes. Replacing flatwork in kind is often exempt; new structural work, right-of-way aprons and drainage changes usually are not. Only your city can say.