Repairing or rebuilding a block wall
A cracked cap, a few broken blocks or a short section that got bumped can usually be repaired. A wall that's leaning, bowing or pulling away from its base is a different story, because the trouble is below the block, and patching the face won't stop it. Sometimes I can't tell which one it is until we dig at the base, and when that's the case I'll say so instead of guessing.
What shapes the cost of a block wall
Beyond size and whether the wall holds back soil, a few things change the cost. A tight side yard means more carrying of block and concrete by hand. An old wall or fence that has to come out first adds tear-out and hauling. A taller retaining wall can need design paperwork before it's permitted, and the cap adds to the material list. Each of these shows up as its own line on the written estimate.