# Building Regulations in Northern Ireland: Technical Booklet H Northern Ireland Technical Booklet H sets a 42° maximum private-stair pitch. Check its own rise, going, width and guarding provisions. - Canonical HTML: https://www.chippy.tools/building-codes/uk/n-ireland/ - Publisher: Chippy Tools - Language: en - Updated: 2026-09-13 [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/) [United Kingdom](https://www.chippy.tools/building-codes/uk/) Topics Stairs - [Scotland Stair Going & Pitch: 225 mm Going, 42° Max](https://www.chippy.tools/building-codes/uk/scotland/stair-going-and-pitch/) - [UK Stair Rules (Approved Document K): Rise, Going, Guarding](https://www.chippy.tools/building-codes/uk/stairs/stair-and-barrier-requirements/) Roofing - [Minimum Roof Pitch in England: Choose the Roof System](https://www.chippy.tools/building-codes/uk/roofing/minimum-roof-pitch/) Footings - [UK Foundation Depths & Footing Widths (Doc A)](https://www.chippy.tools/building-codes/uk/footings/footing-sizes-and-depth/) Room heights - [Does the UK Have a Minimum Ceiling Height?](https://www.chippy.tools/building-codes/uk/rooms/minimum-ceiling-heights/) Ramps - [UK Ramp Gradients (Approved Document M)](https://www.chippy.tools/building-codes/uk/ramps/ramp-gradients/) Wet areas - [Wet-Room Waterproofing in England: Part C and the Project Detail](https://www.chippy.tools/building-codes/uk/wet-areas/waterproofing-requirements/) By nation - [England](https://www.chippy.tools/building-codes/uk/england/) - [N. Ireland](https://www.chippy.tools/building-codes/uk/n-ireland/) - [Scotland](https://www.chippy.tools/building-codes/uk/scotland/) - [Wales](https://www.chippy.tools/building-codes/uk/wales/) 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/) [United Kingdom](https://www.chippy.tools/building-codes/uk/) Topics Stairs - [Scotland Stair Going & Pitch: 225 mm Going, 42° Max](https://www.chippy.tools/building-codes/uk/scotland/stair-going-and-pitch/) - [UK Stair Rules (Approved Document K): Rise, Going, Guarding](https://www.chippy.tools/building-codes/uk/stairs/stair-and-barrier-requirements/) Roofing - [Minimum Roof Pitch in England: Choose the Roof System](https://www.chippy.tools/building-codes/uk/roofing/minimum-roof-pitch/) Footings - [UK Foundation Depths & Footing Widths (Doc A)](https://www.chippy.tools/building-codes/uk/footings/footing-sizes-and-depth/) Room heights - [Does the UK Have a Minimum Ceiling Height?](https://www.chippy.tools/building-codes/uk/rooms/minimum-ceiling-heights/) Ramps - [UK Ramp Gradients (Approved Document M)](https://www.chippy.tools/building-codes/uk/ramps/ramp-gradients/) Wet areas - [Wet-Room Waterproofing in England: Part C and the Project Detail](https://www.chippy.tools/building-codes/uk/wet-areas/waterproofing-requirements/) By nation - [England](https://www.chippy.tools/building-codes/uk/england/) - [N. Ireland](https://www.chippy.tools/building-codes/uk/n-ireland/) - [Scotland](https://www.chippy.tools/building-codes/uk/scotland/) - [Wales](https://www.chippy.tools/building-codes/uk/wales/) 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/) [United Kingdom](https://www.chippy.tools/building-codes/uk/) N. Ireland # Building Regulations in Northern Ireland: Technical Booklet H Northern Ireland Technical Booklet H sets a 42° maximum private-stair pitch. Check its own rise, going, width and guarding provisions. Northern Ireland uses [Technical Booklet H (2012)](https://www.finance-ni.gov.uk/sites/default/files/publications/dfp/Technical-booklet-H-Stairs-ramps-guarding-and-protection-from-impact-October-2012.pdf) for stairs, ramps and guarding. For a private stair, **paragraph 3.12 sets a maximum pitch of 42°**. Table 3.1 also controls rise and going. The maximum rise and minimum going cannot simply be combined: the pitch still has to pass. Use the Northern Irish document for the whole design. Check the stair type, width, headroom, handrails, landings and guarding in their own clauses. Shared dimensions do not make England’s guidance the governing document. [Compare the England stair guide](https://www.chippy.tools/building-codes/uk/stairs/stair-and-barrier-requirements/). Pitch clause checked on 6 September 2026. ## Adoption status Adopted Current code in force Technical Booklet H (2012) Next edition — Adoption / transition Northern Ireland uses Technical Booklet H (2012). Every private-stair and barrier figure matches England, though TB H sets stair pitch via the 2R+G rule rather than a 42-degree limit. [Official source →](https://www.finance-ni.gov.uk/publications/technical-booklet-h) Last verified 2026-07-28 No state-specific variations recorded yet for this jurisdiction. Contains public sector information licensed under the Open Government Licence v3.0. 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