NCC 2022 Volume Two: what's in it for residential builders

TL;DR

NCC 2022 Volume Two governs every Class 1 (house, duplex, townhouse) and Class 10 (garage, shed, fence, pool, retaining wall) build in Australia. The 2022 edition lifted residential thermal performance to 7-star NatHERS plus a Whole of Home energy budget, and added Part H8 Livable Housing Design (silver-level minimums on doorway widths, hobless showers, reinforced bathroom walls). State adoption is staggered: ACT and (most of) NSW from 1 October 2023, NSW energy via enhanced BASIX from 1 May 2024, VIC and QLD from 1 May 2024, SA from 1 October 2024, WA from 1 May 2025, NT keeps 5-star, Tas adopted condensation only. Confirm the state’s current NCC adoption notice before pricing energy and accessibility, that’s where compliance pathways and contract sums get burnt.

In plain English

The National Construction Code (NCC) is the technical building code every residential build in Australia must comply with. Volume Two is the residential volume: it applies to Class 1 buildings (houses, duplexes, townhouses, small short-stay accommodation) and Class 10 structures (garages, sheds, carports, fences, pools, retaining walls, private bushfire shelters).

If a build sits in those classes, NCC 2022 Volume Two is the minimum legal bar. State legislation adopts it (often with state-specific tweaks), and the DA, building permit, or CDC is assessed against it.

Volume Two doesn’t sit alone. The Performance Requirements live in Volume Two itself, but most of the deemed-to-satisfy (DTS) detail (the actual numbers used for compliance) sits in a separate ABCB document: the ABCB Housing Provisions Standard 2022. The two are read together.

What it requires

Volume Two’s residential rules sit in Section H, Class 1 and 10 buildings. Eight parts cover the lot:

Part	Subject	What it sets
H1	Structure	Loads, footings, slabs, framing, masonry, glazing
H2	Damp and weatherproofing	Subfloor damp, external walls, roof and box gutters
H3	Fire safety	Garage to dwelling separation, common walls in attached Class 1, smoke alarms, BAL bushfire construction
H4	Health and amenity	Wet areas (links to AS 3740), ventilation, sound, daylight, sanitary facilities
H5	Safe movement and access	Stairs, balustrades, handrails, ramps, slip resistance
H6	Energy efficiency	NatHERS thermal performance, Whole of Home energy budget, services efficiency
H7	Ancillary provisions	Class 10b structures (fences, masts, retaining walls, pool barriers) and additional construction requirements
H8	Livable housing design	Step-free entry, wider doors and corridors, accessible WC on the entry level, reinforced bathroom walls

State and territory variations sit as numbered “S Part H9” / “S Part H10” appendices (SA water efficiency, SA disability access, WA water use). Always check the relevant state appendix.

Energy: NCC 2022’s headline change

NCC 2022 lifted the residential thermal performance minimum from 6 stars to 7 stars NatHERS and introduced a Whole of Home (WoH) energy budget that scores fixed appliances (hot water, heating, cooling, lighting, pool pumps, plug-load allowance, on-site PV) on a points scale.

Two practical effects:

The thermal performance side is harder to scrape through with mid-range glazing and standard insulation. Most 7-star designs need either better glazing (double-glazed or low-e), higher wall and ceiling R-values, or a more compact form than 6-star designs.
WoH rewards efficient services and PV. A 7-star home with reverse-cycle heating/cooling, heat-pump hot water, and PV passes WoH easily. A 7-star home with bottled gas hot water and resistive heating won’t.

For NSW, the equivalent compliance pathway is BASIX (enhanced from 1 May 2024 to align with 7-star + WoH), not the national NatHERS pathway directly.

Livable housing: the new mandatory minimum

Part H8 set, for the first time, mandatory minimum accessibility features in new Class 1a houses and new Class 2 sole-occupancy units. The Part H8 minimum aligns with the silver level of the Livable Housing Design Guidelines (full DTS in the ABCB Standard for Livable Housing Design 2022). Voluntary gold and platinum levels remain optional.

In practical terms this is at least: a step-free path to the entry, an accessible WC on the entry level, walk-in or hobless shower, doors and corridors wide enough for a wheelchair, and noggings or sheet bracing in bathroom walls so grab rails can be retrofitted later.

What it doesn’t cover

Class 2 to 9 buildings (apartments, offices, retail, hotels, hospitals, factories). Those sit in Volume One.
Plumbing trade work (rough-in pipework, drainage, water service). That’s Volume Three (the Plumbing Code of Australia, PCA), backed by AS 3500.
Electrical wiring and switchgear. AS/NZS 3000 territory.
Demolition, asbestos handling, WHS on site. Those sit under WHS Acts and SafeWork regulators, not the NCC.
Heritage, planning, neighbour amenity, setbacks, height limits, FSR, flood overlays. Those are local LEP / DCP / SEPP planning instruments, assessed in the DA, not the NCC.
State licensing of who can do the work. Fair Trading / VBA / QBCC / etc.

Practical implications

State adoption summary

Adoption of NCC 2022 (especially H6 energy and H8 livable housing) was staggered across states. Always confirm against the ABCB’s state adoption page and the relevant state regulator before quoting or designing.

State / Territory	NCC 2022 in force	7-star + WoH energy	Part H8 livable housing
ACT	1 Oct 2023	1 Oct 2023	1 Oct 2023
NSW	1 Oct 2023	1 May 2024 (via enhanced BASIX)	1 Oct 2023
VIC	1 May 2024	1 May 2024	1 May 2024
QLD	1 May 2024	1 May 2024	1 Oct 2023
SA	1 Oct 2024	1 Oct 2024	1 Oct 2024
TAS	Condensation provisions only	Not adopted (under review)	1 Oct 2024
WA	1 May 2025	1 May 2025	1 May 2025
NT	Limited adoption	Not adopted (5-star retained)	Not adopted

Common DTS pitfalls

The easy ways to fail compliance on a Class 1 build:

Garage to dwelling fire separation (H3): the connecting wall and door must meet the FRL stated in the Housing Provisions, including a self-closing solid-core door where required. Claiming a wall FRL without checking the door is the standard miss.
Balustrade height (H5): 1m minimum above the floor on landings, decks, and stairs where the fall exceeds the trigger height. No climbable elements within the restricted lower zone.
Wet area waterproofing (H4 by reference to AS 3740): falls to waste, hob heights, and turn-up at door thresholds have hard numbers. Missing the falls is the most common reno defect.
Energy (H6): NatHERS rating done before the window schedule is locked. Late glazing changes break the rating and force a redo at certifier stage.
Livable housing (H8): the entry path. Step-free is read against the ABCB Standard for Livable Housing Design 2022, not just “no front step”.

When to use a Performance Solution

Volume Two compliance is normally via the deemed-to-satisfy provisions in the ABCB Housing Provisions. Where the design can’t meet DTS (heritage retrofit, awkward block, complex fire scenario), the alternative is a Performance Solution: an engineer or fire-safety consultant prepares a report demonstrating the design meets the Performance Requirement another way. A certifier signs off.

Performance Solutions are normal and legal, but cost money for the consultant report and certifier review. Budget them in early when DTS doesn’t fit.

Source link

ABCB official copy of NCC 2022 Volume Two: https://ncc.abcb.gov.au/editions/ncc-2022/adopted/volume-two

Free read-only access requires a free ABCB account. PDFs are also free to download from the same site.

References

Australian Building Codes Board, NCC 2022 Volume Two (adopted edition). https://ncc.abcb.gov.au/editions/ncc-2022/adopted/volume-two (verified 2026-05-04).
Australian Building Codes Board, Section H Class 1 and 10 buildings, NCC 2022 Volume Two. https://ncc.abcb.gov.au/editions/ncc-2022/adopted/volume-two/h-class-1-and-10-buildings (verified 2026-05-04).
Australian Building Codes Board, NCC 2022 state and territory adoption dates. https://ncc.abcb.gov.au/ncc-2022-state-and-territory-adoption-dates (verified 2026-05-04).
Australian Building Codes Board, Part H8 Livable housing design, NCC 2022 Volume Two. https://ncc.abcb.gov.au/editions/ncc-2022/adopted/volume-two/h-class-1-and-10-buildings/part-h8-livable-housing-design (verified 2026-05-04).
Australian Building Codes Board, ABCB Standard for Livable Housing Design 2022. https://ncc.abcb.gov.au/sites/default/files/resources/2023/livable-housing-design-20221219.pdf (verified 2026-05-04).
Nationwide House Energy Rating Scheme, Victoria and Queensland adopt NCC 2022. https://www.nathers.gov.au/blog/victoria-and-queensland-adopt-ncc-2022 (verified 2026-05-04).

NCC, what the National Construction Code is and how it works
BASIX, the NSW energy and water compliance pathway (carries H6 for NSW)
BAL, bushfire attack levels referenced in H3 fire safety
Livable Housing Silver, the standard Part H8 is built on
AS standards, referenced in DTS provisions across H1 to H8
Energy report (NatHERS), what 7-star + WoH delivers in the design pack
Reading a building contract, where NCC compliance lives in the contract clauses
DA process NSW, where NCC compliance is assessed at approval