NatHERS ENERGY RATINGS NatHERS 6 Star Energy Ratings for residential buildings. BASIX BASIX Certificates for residential buildings in NSW. BCA SECTION J For Class 2-9 commercial buildings. BCA JV3 Advanced assessment method of Section J for increased building design flexibility. BCA DTS REPORTS Demonstrating compliance with BCA Elemental Provisions for Class 1 and 10a … Continue reading COMPLIANCE SERVICES