1#重庆人 6 ]! Z" s, V: f, i " l0 F7 b7 K. \9 ]4 W 9 P$ n+ a4 R$ `+ c( P) G$ tIf 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.