1#重庆人 ! G: r& h S9 P 8 I, |6 H6 R/ T8 _! o0 `$ X( }7 [4 M( e- q7 V/ q
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.