1#重庆人 . h: ?$ i3 c' G0 T( q3 Q , s v7 W4 h1 Z q" C5 d6 T( EIf 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.