1#重庆人 & }' V r2 Y- I2 ^. e7 z3 l1 a1 [ / ?1 T2 j/ x2 w( y3 ] F; i7 c K) J, j* \, x& F6 TIf 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.