1#重庆人 : } P8 ^2 O9 _7 Y5 I2 k- K ) `" @3 a) X6 P! U( Q+ }" E 5 f4 R- ^' w8 Y) |: xIf 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.