QLDClass 1aNCC 202226 June 2026
What thermal performance rating does a new home need to meet under NCC 2022?
Under NCC 2022, a new Class 1 home must meet two energy efficiency requirements:
- a 7-star NatHERS thermal performance rating for the building envelope, raised from the previous 6-star minimum; [1]
- a separate whole-of-home annual energy use budget covering major fixed appliances such as heating, cooling, hot water, and lighting. [1]
Note the operative date differs by jurisdiction — states adopted the NCC 2022 energy provisions on different timelines, so confirm the date that applies in yours before relying on the 7-star figure. [2]
Sources
- 1NCC 2022 Volume TwoPart 13.2 Energy efficiency · p. 198
- 2ABCB — NCC 2022 adoption and transition by jurisdictionAdoption schedule · State summary
This answer is for professional reference only and does not replace a registered building surveyor or certifier. The operative edition of the NCC differs by jurisdiction and changes over time. Verify against the current code for your jurisdiction before relying on it.