JSP 315 contains the specifications for new buildings including SFA, (TSARs) JSP 464 pt 4 contains the grading regulations, unfortuntely neither will help in your situation. I know because I helped rewrite the JSP. There is no entitlement/requirement for DE to bring SFA up to the standard in JSP315, if there was DE would need a significantly larger budget. Plus they'd probably start by fixing larger issues like damp, condensation, new kitchens/bathrooms etc.