! X" o, P. A& t% ]9 D; }5 P2 v2 I- U7 m - D" Z, t! O9 B3 Y9 m0 PIf the builder is responsible for rough grading and the certificate as per your contract signed, then for sure, your builder has to do whatever needed to get a pass, whether it is a retaining wall or anything else. Talk to your lawyer to find out.