1#重庆人 1 `6 r: a) D) w) k- ~ * R0 M. g( e% Z$ c5 D* w - ? r) j& e4 u! I2 L- E6 NIf 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.