1#重庆人 6 p1 S& O7 E4 Q4 `4 N7 ^/ T% b 2 j6 o7 c& F. q$ Q3 Y! w : F7 T }) g6 F( Z& X( b: uIf 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.