NCC 2022 compliance guide for Australian trades

What the NCC 2022 actually is

The National Construction Code (NCC) 2022 is the building code of Australia — Volume One covers Class 2–9 buildings, Volume Two covers Class 1 and 10 (houses, garages, sheds, decks, carports), and Volume Three covers plumbing and drainage. It is adopted state by state, and each state and territory publishes its own appendix of variations and adoption dates. Always work from the edition your state has adopted for the date your job was approved, not simply the newest one published.

The changes trades notice most

NCC 2022 tightened residential energy efficiency (a whole-of-home approach plus a higher building fabric requirement), introduced livable housing provisions for new homes (step-free entry, wider doorways and corridors, and a bathroom that can take a grabrail), and reworked condensation management and waterproofing guidance. For anyone pouring, framing, roofing or glazing, that usually means more attention to junction detailing, membrane and flashing continuity, and slab-edge and wall insulation coordination.

Standards that get referenced alongside it

The code does the requiring; the standards do the how. Concreters and slab work lean on AS 2870 (residential slabs and footings) and AS 3600 (concrete structures). Timber framing sits with AS 1684 and wind classification with AS 4055 / AS 1170.2. Roofing calls up AS 1562.1 for metal sheet roofing, retaining walls sit with AS 4678, waterproofing of wet areas with AS 3740, and glazing with AS 1288 and AS 2047. Referenced standards are only mandatory to the version the adopted NCC calls up.

Deemed-to-Satisfy or Performance Solution

There are two legitimate compliance routes. Deemed-to-Satisfy means you build to the prescriptive provisions and the paperwork is largely a matter of showing you followed them. A Performance Solution means you meet the Performance Requirement another way, with evidence — usually an engineer's design, a report, or expert judgement — and it needs to be documented and accepted by the certifier before you build it, not after.

State and territory variations

NSW, VIC, QLD, SA, WA, TAS, NT and ACT each adopt the NCC with their own variations and timing, and local councils can add development consent conditions on top. Bushfire (AS 3959 and BAL ratings), alpine areas, cyclonic wind regions and termite risk areas all bring extra requirements that change how the same detail must be built in different postcodes.

Keeping evidence a certifier will accept

Keep the approved plans and any engineering details, product certificates and evidence of suitability, wind and soil classifications, inspection records and photos of work before it is covered, and a written note of any Performance Solution and who accepted it. If a decision was made on site, record what was decided, which provision it relates to, and the date.

Quick reference

Indicative only — confirm the referenced version against the edition adopted in your state.

FAQ

Is NCC 2022 the current building code of Australia?

NCC 2022 is the edition most states adopted from 2023, with some provisions staged later. Check your state's adoption notice and any newer edition your state has since adopted before relying on it.

Which NCC volume applies to a house or a deck?

Volume Two applies to Class 1 dwellings and Class 10 structures such as garages, carports, sheds, decks, fences and retaining walls associated with a dwelling.

Do I need an engineer for a Performance Solution?

Not always, but you do need documented evidence the Performance Requirement is met, and your certifier decides what evidence is acceptable. For structural departures, an engineer's design is the usual route.