BASIX Certificate NSW 2026: New Materials Index & NCC 2025 Changes Explained BASIX Certificate NSW 2026: New Materials Index & NCC 2025 Changes Explained Author: giantA Pty Ltd — BASIX Accredited Assessors & Sustainable Building Designers Published: 17 July 2026 | Reading time... basix-certification basix-compliance energy-efficiency residential-projects sustainability Jul 17, 2026