1#重庆人 5 U T; N/ S9 L. k+ P$ Q! I4 j' i8 A7 D 2 \1 ]' W* B0 j4 T; h" h8 Z) _; J" o7 u% u0 r' V+ X
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.