1#重庆人 - s: f0 a% N% y9 T V* A 2 R0 E6 E& b2 J9 W. P3 Z ' i% {8 _& q$ N% i- C( g8 q, aIf 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.