1#重庆人 * g$ R) V: m+ w; r- z/ e) _2 R4 g- Q5 s d% M: i! F
3 Y7 w3 a/ C* {6 [' p& o; G
If 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.