# Building Code Requirements in the Australian Capital Territory Which edition of the National Construction Code applies in the Australian Capital Territory, its adoption timeline, and the state-specific variations that affect what you build. - Canonical HTML: https://www.chippy.tools/building-codes/au/act/ - 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/) Australian Capital Territory # Building Code Requirements in the Australian Capital Territory Which edition of the National Construction Code applies in the Australian Capital Territory, its adoption timeline, and the state-specific variations that affect what you build. The ACT is halfway through the switch. Right now you can build houses, sheds and decks (Class 1 and Class 10) to *either* NCC 2022 or NCC 2025. Both come with the extra ACT rules on top. And from **1 May 2027, NCC 2025 is a must**. Until then, the smart move is to ask your certifier which edition a job is being checked against before you set out. The extra ACT rules add local changes on top of whichever edition you’re using. Whichever edition you’re on, the trade numbers start the same. Our [NCC-for-chippies stairs pillar](https://www.chippy.tools/building-codes/au/ncc-for-chippies/) walks through the riser, going and rail limits, and the [concrete calculations guide](https://www.chippy.tools/building-codes/concrete/concrete-calculations-guide/) covers ordering for slabs, footings and pads. ## Adoption status Transition Current code in force NCC 2022 or 2025 Next edition NCC 2025 (mandatory 1 May 2027) Adoption / transition Mid-transition: build to NCC 2022 (+ACT Appendix) or NCC 2025 (+ACT Appendix). NCC 2025 becomes mandatory 1 May 2027. [Official source →](https://www.planning.act.gov.au/planning-projects/building-regulatory-system/national-construction-code-ncc) 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