NCC 2025 NSW: What the May 2027 Adoption Date Means for Your Building Project NSW will adopt the National Construction Code (NCC) 2025 on 1 May 2027 , a full 12 months after the Australian Building Codes Board (ABCB) published the complete code on 1 May 2026. The Minns Governme... BASIX NSW Planning commercial-projects da-approval energy-efficiency home-renovation nsw-planning sustainability Aug 16, 2026