NCC 2022 in NSW: What 7-Star and Whole-of-Home Mean for Your Build
NCC 2022 lifted the bar for new NSW homes to 7 stars and added a Whole-of-Home energy budget. Here is what changed and how to design for it.
The 2022 National Construction Code (NCC) brought the biggest change to residential energy standards in over a decade. If you are building a new home in New South Wales, two things now matter more than ever: a 7-star NatHERS rating and a Whole-of-Home assessment. Here is what each one means in plain language, and how to design so they are not a last-minute scramble.
From 6 stars to 7 stars
The old minimum for the building fabric was 6 stars. NCC 2022 raised it to 7. That single star sounds small, but it represents roughly a 25 percent reduction in the heating and cooling energy your home needs. In practice it means better glazing choices, properly sized eaves and more attention to orientation than many older project-home designs allowed for.
The new Whole-of-Home budget
The star rating only covers the shell of the home. NCC 2022 added a second test, Whole-of-Home, which looks at the fixed equipment that actually uses energy: heating and cooling, hot water, lighting and any rooftop solar. Your home is given an annual energy budget and the modelled appliances have to come in under it.
The upside for owners is real flexibility. A good hot water system or a modest solar array can offset other choices, so the two tests work together rather than against each other.
What this means for your project
- Orientation and glazing decisions are now worth real money. Lock them in early.
- Your appliance and hot water selections are part of compliance, not an afterthought.
- Solar is no longer just a nice-to-have. It can be the cheapest path to passing Whole-of-Home.
How NSW applies it
In NSW these requirements are delivered through BASIX, so you will see the 7-star and Whole-of-Home outcomes reflected in your BASIX Certificate commitments. That is why getting your NatHERS assessment and BASIX Certificate prepared together saves time and avoids conflicting documents.
Frequently asked questions
Does NCC 2022 apply to renovations? It applies to new dwellings and, depending on scope and cost, to major alterations and additions. We can confirm quickly from your plans.
Is 7 stars expensive to reach? Not when the design is right from the start. The cost comes from retrofitting changes after documentation is locked in.
Planning a new build under NCC 2022? Send us your plans for a fast, fixed-fee quote.
BASIX & NatHERS specialists, a division of Contrive Consultants. We help NSW homeowners and builders achieve energy-efficient, compliant homes.