1#重庆人1 L9 |3 j' h! Z- v
! T6 R4 L- k1 t1 S4 J
% d9 c, ?- |+ r# L
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.