# Building Code Requirements in Western Australia Which edition of the National Construction Code applies in Western Australia, its adoption timeline, and the state-specific variations that affect what you build. - Canonical HTML: https://www.chippy.tools/building-codes/au/wa/ - Publisher: Chippy Tools - Language: en - Updated: 2026-09-12 [Browse all topics](https://www.chippy.tools/building-codes/topics/)[Free web tools](https://www.chippy.tools/building-codes/tools/)[Printable references](https://www.chippy.tools/building-codes/printables/) [All countries](https://www.chippy.tools/building-codes/) [Australia](https://www.chippy.tools/building-codes/au/) [Start here](https://www.chippy.tools/building-codes/au/ncc-for-chippies/) Topics Stairs - [NCC Stair Requirements: Riser, Going & the 2R+G Rule Explained](https://www.chippy.tools/building-codes/au/stairs/ncc-stair-requirements/) - [Maximum & Minimum Stair Riser Heights in Australia](https://www.chippy.tools/building-codes/au/stairs/stair-riser-heights/) - [How to Calculate Stairs: Rise, Run & Number of Steps](https://www.chippy.tools/building-codes/au/stairs/how-to-calculate-stairs/) - [Balustrade Height Requirements: When Do You Need One?](https://www.chippy.tools/building-codes/au/stairs/balustrade-height-requirements/) - [Stair Winders & Landings (NCC 2025)](https://www.chippy.tools/building-codes/au/stairs/stair-winders-and-landings/) Timber framing - [AS 1684 Span Tables Explained: Start with the Inputs](https://www.chippy.tools/building-codes/au/framing/as-1684-span-tables-explained/) - [Wind Classification: The Input Your Frame Needs](https://www.chippy.tools/building-codes/au/framing/wind-classification-australia/) - [Floor Joist Spans: What Determines the Answer](https://www.chippy.tools/building-codes/au/framing/floor-joist-spans-explained/) - [Rafter Spans and Roof Members: Geometry Is Only the Start](https://www.chippy.tools/building-codes/au/framing/rafter-spans-and-roof-members/) - [MGP10 vs MGP12: Grade Is One Part of the Specification](https://www.chippy.tools/building-codes/au/framing/mgp10-vs-mgp12/) - [Stud Spacing: Start with the Wall Design](https://www.chippy.tools/building-codes/au/framing/stud-spacing-and-wall-framing/) - [Construction Timbers in Queensland: Check the Species Requirement](https://www.chippy.tools/building-codes/au/qld/construction-timbers-queensland/) Roofing - [Queensland Cyclone Tie-Downs: Which Wind Regions Count](https://www.chippy.tools/building-codes/au/qld/cyclone-tie-downs/) - [Minimum Roof Pitch (NCC 2025): Metal vs Tile](https://www.chippy.tools/building-codes/au/roofing/minimum-roof-pitch/) - [Gutters & Downpipes: NCC Sizing Basics](https://www.chippy.tools/building-codes/au/roofing/gutters-and-downpipes/) Footings - [Footing Sizes & Site Classification (AS 2870)](https://www.chippy.tools/building-codes/au/footings/footing-sizes-site-classification/) Room heights - [Minimum Ceiling Heights (NCC 2025)](https://www.chippy.tools/building-codes/au/rooms/minimum-ceiling-heights/) Ramps - [House Ramp Gradients: Choose the Right NCC Path](https://www.chippy.tools/building-codes/au/ramps/ramp-gradients/) Wet areas - [Wet Area Floor Wastes in Queensland (QDC MP 4.5)](https://www.chippy.tools/building-codes/au/qld/wet-area-floor-wastes/) - [Shower & Wet Area Waterproofing (NCC 2025)](https://www.chippy.tools/building-codes/au/wet-areas/waterproofing-requirements/) By state & territory - [Australian Capital Territory](https://www.chippy.tools/building-codes/au/act/) - [New South Wales](https://www.chippy.tools/building-codes/au/nsw/) - [Northern Territory](https://www.chippy.tools/building-codes/au/nt/) - [Queensland](https://www.chippy.tools/building-codes/au/qld/) - [South Australia](https://www.chippy.tools/building-codes/au/sa/) - [Tasmania](https://www.chippy.tools/building-codes/au/tas/) - [Victoria](https://www.chippy.tools/building-codes/au/vic/) - [Western Australia](https://www.chippy.tools/building-codes/au/wa/) Calculation guides - [Concrete Calculations: The Complete On-Site Guide](https://www.chippy.tools/building-codes/concrete/concrete-calculations-guide/) - [How to Calculate Concrete Volume for a Slab](https://www.chippy.tools/building-codes/concrete/concrete-volume-slab/) - [How Many Bags of Concrete Per m³? (20kg, 25kg, 40kg)](https://www.chippy.tools/building-codes/concrete/bags-of-concrete-per-m3/) - [Concrete for Post Holes: Volume Per Hole & Bags Needed](https://www.chippy.tools/building-codes/concrete/concrete-post-holes/) - [Concrete Mix Ratios Explained: 1:2:3, 1:2:4 & Water-Cement Ratio](https://www.chippy.tools/building-codes/concrete/concrete-mix-ratios/) - [Roof Pitch to Angle: Convert Rise/Run to Degrees & Grade](https://www.chippy.tools/building-codes/concrete/roof-pitch-to-angle/) - [Rafter Length Calculation: Run, Rise & Overhang](https://www.chippy.tools/building-codes/concrete/rafter-length/) - [Stair Rise & Run Setout: Riser, Going & the 2R+G Formula](https://www.chippy.tools/building-codes/concrete/stair-rise-and-run-setout/) - [How to Convert a Fall or Gradient: Ratio, Percentage & Degrees](https://www.chippy.tools/building-codes/concrete/fall-and-gradient-conversion/) - [Stud & Joist Spacing Takeoff: How Many at 400, 450 & 600 mm Centres](https://www.chippy.tools/building-codes/concrete/stud-and-joist-spacing-takeoff/) - [Gravel & Base Volume: Compacted Depth vs Loose-Fill Order Quantity](https://www.chippy.tools/building-codes/concrete/gravel-and-base-volume/) In this section [Browse all topics](https://www.chippy.tools/building-codes/topics/)[Free web tools](https://www.chippy.tools/building-codes/tools/)[Printable references](https://www.chippy.tools/building-codes/printables/) [All countries](https://www.chippy.tools/building-codes/) [Australia](https://www.chippy.tools/building-codes/au/) [Start here](https://www.chippy.tools/building-codes/au/ncc-for-chippies/) Topics Stairs - [NCC Stair Requirements: Riser, Going & the 2R+G Rule Explained](https://www.chippy.tools/building-codes/au/stairs/ncc-stair-requirements/) - [Maximum & Minimum Stair Riser Heights in Australia](https://www.chippy.tools/building-codes/au/stairs/stair-riser-heights/) - [How to Calculate Stairs: Rise, Run & Number of Steps](https://www.chippy.tools/building-codes/au/stairs/how-to-calculate-stairs/) - [Balustrade Height Requirements: When Do You Need One?](https://www.chippy.tools/building-codes/au/stairs/balustrade-height-requirements/) - [Stair Winders & Landings (NCC 2025)](https://www.chippy.tools/building-codes/au/stairs/stair-winders-and-landings/) Timber framing - [AS 1684 Span Tables Explained: Start with the Inputs](https://www.chippy.tools/building-codes/au/framing/as-1684-span-tables-explained/) - [Wind Classification: The Input Your Frame Needs](https://www.chippy.tools/building-codes/au/framing/wind-classification-australia/) - [Floor Joist Spans: What Determines the Answer](https://www.chippy.tools/building-codes/au/framing/floor-joist-spans-explained/) - [Rafter Spans and Roof Members: Geometry Is Only the Start](https://www.chippy.tools/building-codes/au/framing/rafter-spans-and-roof-members/) - [MGP10 vs MGP12: Grade Is One Part of the Specification](https://www.chippy.tools/building-codes/au/framing/mgp10-vs-mgp12/) - [Stud Spacing: Start with the Wall Design](https://www.chippy.tools/building-codes/au/framing/stud-spacing-and-wall-framing/) - [Construction Timbers in Queensland: Check the Species Requirement](https://www.chippy.tools/building-codes/au/qld/construction-timbers-queensland/) Roofing - [Queensland Cyclone Tie-Downs: Which Wind Regions Count](https://www.chippy.tools/building-codes/au/qld/cyclone-tie-downs/) - [Minimum Roof Pitch (NCC 2025): Metal vs Tile](https://www.chippy.tools/building-codes/au/roofing/minimum-roof-pitch/) - [Gutters & Downpipes: NCC Sizing Basics](https://www.chippy.tools/building-codes/au/roofing/gutters-and-downpipes/) Footings - [Footing Sizes & Site Classification (AS 2870)](https://www.chippy.tools/building-codes/au/footings/footing-sizes-site-classification/) Room heights - [Minimum Ceiling Heights (NCC 2025)](https://www.chippy.tools/building-codes/au/rooms/minimum-ceiling-heights/) Ramps - [House Ramp Gradients: Choose the Right NCC Path](https://www.chippy.tools/building-codes/au/ramps/ramp-gradients/) Wet areas - [Wet Area Floor Wastes in Queensland (QDC MP 4.5)](https://www.chippy.tools/building-codes/au/qld/wet-area-floor-wastes/) - [Shower & Wet Area Waterproofing (NCC 2025)](https://www.chippy.tools/building-codes/au/wet-areas/waterproofing-requirements/) By state & territory - [Australian Capital Territory](https://www.chippy.tools/building-codes/au/act/) - [New South Wales](https://www.chippy.tools/building-codes/au/nsw/) - [Northern Territory](https://www.chippy.tools/building-codes/au/nt/) - [Queensland](https://www.chippy.tools/building-codes/au/qld/) - [South Australia](https://www.chippy.tools/building-codes/au/sa/) - [Tasmania](https://www.chippy.tools/building-codes/au/tas/) - [Victoria](https://www.chippy.tools/building-codes/au/vic/) - [Western Australia](https://www.chippy.tools/building-codes/au/wa/) Calculation guides - [Concrete Calculations: The Complete On-Site Guide](https://www.chippy.tools/building-codes/concrete/concrete-calculations-guide/) - [How to Calculate Concrete Volume for a Slab](https://www.chippy.tools/building-codes/concrete/concrete-volume-slab/) - [How Many Bags of Concrete Per m³? (20kg, 25kg, 40kg)](https://www.chippy.tools/building-codes/concrete/bags-of-concrete-per-m3/) - [Concrete for Post Holes: Volume Per Hole & Bags Needed](https://www.chippy.tools/building-codes/concrete/concrete-post-holes/) - [Concrete Mix Ratios Explained: 1:2:3, 1:2:4 & Water-Cement Ratio](https://www.chippy.tools/building-codes/concrete/concrete-mix-ratios/) - [Roof Pitch to Angle: Convert Rise/Run to Degrees & Grade](https://www.chippy.tools/building-codes/concrete/roof-pitch-to-angle/) - [Rafter Length Calculation: Run, Rise & Overhang](https://www.chippy.tools/building-codes/concrete/rafter-length/) - [Stair Rise & Run Setout: Riser, Going & the 2R+G Formula](https://www.chippy.tools/building-codes/concrete/stair-rise-and-run-setout/) - [How to Convert a Fall or Gradient: Ratio, Percentage & Degrees](https://www.chippy.tools/building-codes/concrete/fall-and-gradient-conversion/) - [Stud & Joist Spacing Takeoff: How Many at 400, 450 & 600 mm Centres](https://www.chippy.tools/building-codes/concrete/stud-and-joist-spacing-takeoff/) - [Gravel & Base Volume: Compacted Depth vs Loose-Fill Order Quantity](https://www.chippy.tools/building-codes/concrete/gravel-and-base-volume/) [Building Codes](https://www.chippy.tools/building-codes/) [Australia](https://www.chippy.tools/building-codes/au/) Western Australia # Building Code Requirements in Western Australia Which edition of the National Construction Code applies in Western Australia, its adoption timeline, and the state-specific variations that affect what you build. Western Australia has already brought in **NCC 2025**, but you’re in a 12-month switch-over window. Until **1 May 2027** you can build houses, sheds and decks (Class 1 and Class 10) to *either* NCC 2022 *or* NCC 2025 — your call, agreed with your certifier. After that, NCC 2025 is the only edition left. So it pays to check which edition a job’s approval was lodged under. Two sites next door to each other could each be running to a different edition right now, and both would be fine. However you’re set up, the trade numbers don’t change job to job. Our [NCC-for-chippies stairs pillar](https://www.chippy.tools/building-codes/au/ncc-for-chippies/) covers the riser, going and rail numbers you’ll need either way, and the [concrete calculations guide](https://www.chippy.tools/building-codes/concrete/concrete-calculations-guide/) helps you order the right amount for slabs and footings. ## Adoption status Transition Current code in force NCC 2025 Next edition — Adoption / transition Adopted 1 May 2026 with a 12-month transition — either NCC 2022 or 2025 until 1 May 2027, then NCC 2025 only. [Official source →](https://ncc.abcb.gov.au/ncc-2025/ncc-2025-state-and-territory-adoption-information) Last verified 2026-07-27 No state-specific variations recorded yet for this jurisdiction. Content adapted from the National Construction Code 2022, provided by the Australian Building Codes Board under the CC BY 4.0 licence. This page is general information for tradespeople and is not compliance, engineering or legal advice. Requirements are subject to state and territory variations and adoption timing. Always confirm requirements with your building certifier and relevant state authority. ## Page directory