# Norwegian Building Regulations: One National Rule Book Norway builds to a single national regulation, TEK17, with Direktoratet for byggkvalitet's own veiledning as the deemed-to-satisfy route — no county or municipal variations. Here are the rules and the calculators that solve them. - Canonical HTML: https://www.chippy.tools/building-codes/no/ - Publisher: Chippy Tools - Language: en - Updated: 2026-09-21 [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/) [Norway](https://www.chippy.tools/building-codes/no/) Topics Stairs - [Norwegian Stair & Guard Rules: Going, Headroom, Handrails (TEK17)](https://www.chippy.tools/building-codes/no/stairs/stair-and-guard-requirements/) Roofing - [Norway Minimum Roof Fall (TEK17 §13-12): The 1:40 Rule](https://www.chippy.tools/building-codes/no/roofing/minimum-roof-pitch/) Footings - [Norwegian Foundation Depth & Width: Why TEK17 Sets No Fixed Number](https://www.chippy.tools/building-codes/no/footings/foundation-depth-and-width/) Room heights - [Norwegian Room Height, Light & Ventilation Rules (TEK17)](https://www.chippy.tools/building-codes/no/rooms/minimum-ceiling-heights/) Ramps - [Norwegian Ramp Gradients: TEK17 §12-16](https://www.chippy.tools/building-codes/no/ramps/ramp-gradients/) Wet areas - [Norwegian Wet-Room Falls and Waterproofing: TEK17 §13-15](https://www.chippy.tools/building-codes/no/wet-areas/waterproofing-requirements/) 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/) [Norway](https://www.chippy.tools/building-codes/no/) Topics Stairs - [Norwegian Stair & Guard Rules: Going, Headroom, Handrails (TEK17)](https://www.chippy.tools/building-codes/no/stairs/stair-and-guard-requirements/) Roofing - [Norway Minimum Roof Fall (TEK17 §13-12): The 1:40 Rule](https://www.chippy.tools/building-codes/no/roofing/minimum-roof-pitch/) Footings - [Norwegian Foundation Depth & Width: Why TEK17 Sets No Fixed Number](https://www.chippy.tools/building-codes/no/footings/foundation-depth-and-width/) Room heights - [Norwegian Room Height, Light & Ventilation Rules (TEK17)](https://www.chippy.tools/building-codes/no/rooms/minimum-ceiling-heights/) Ramps - [Norwegian Ramp Gradients: TEK17 §12-16](https://www.chippy.tools/building-codes/no/ramps/ramp-gradients/) Wet areas - [Norwegian Wet-Room Falls and Waterproofing: TEK17 §13-15](https://www.chippy.tools/building-codes/no/wet-areas/waterproofing-requirements/) 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/) Norway # Norwegian Building Regulations: One National Rule Book Norway builds to one national Byggteknisk forskrift (TEK17), with Direktoratet for byggkvalitet's own veiledning setting the deemed-to-satisfy numbers — so there's no county-by-county rule book to track for stairs, guards, ramps or room heights. This hub carries the TEK17 figures straight from the regulation, and flags plainly where a number (like foundation frost depth) is genuinely left to Eurocode design rather than fixed in TEK17 itself. ## Rules by topic Find guidance for the work you are doing, then confirm the requirements for your building and location. ### Stairs - [Norwegian Stair & Guard Rules: Going, Headroom, Handrails (TEK17)](https://www.chippy.tools/building-codes/no/stairs/stair-and-guard-requirements/) ### Roofing - [Norway Minimum Roof Fall (TEK17 §13-12): The 1:40 Rule](https://www.chippy.tools/building-codes/no/roofing/minimum-roof-pitch/) ### Footings & slabs - [Norwegian Foundation Depth & Width: Why TEK17 Sets No Fixed Number](https://www.chippy.tools/building-codes/no/footings/foundation-depth-and-width/) ### Room heights - [Norwegian Room Height, Light & Ventilation Rules (TEK17)](https://www.chippy.tools/building-codes/no/rooms/minimum-ceiling-heights/) ### Ramps - [Norwegian Ramp Gradients: TEK17 §12-16](https://www.chippy.tools/building-codes/no/ramps/ramp-gradients/) ### Wet areas - [Norwegian Wet-Room Falls and Waterproofing: TEK17 §13-15](https://www.chippy.tools/building-codes/no/wet-areas/waterproofing-requirements/) ## One rule book for the whole country Norway builds to **one** regulation, and it applies everywhere — Oslo, Trondheim, or a one-off site up a fjord. There is no county-by-county or kommune version of the technical rules. Every building authority (kommune) checks a job against the same national regulation. That regulation is the **Byggteknisk forskrift**, universally known as **TEK17** — set under the Plan- og bygningsloven (the Planning and Building Act) by **Direktoratet for byggkvalitet (DiBK)**, the Norwegian Building Authority. TEK17 sets out *what* a building has to do — stand up, keep people from falling, ventilate properly, let in enough daylight — but a lot of the exact numbers a chippy sets out on site sit in DiBK’s own **veiledning** (official guidance) to each section, not in the regulation’s bare paragraph text. ## Where the numbers come from Each section of TEK17 carries a **veiledning** — DiBK’s guidance on how to meet that section — and inside the veiledning sits a **preakseptert ytelse** (pre-accepted performance): a route to showing compliance within its stated scope and conditions. That’s the deemed-to-satisfy route most jobs use. A designer can instead show compliance by another method — an analysis or a different design — so treat the numbers on these pages as guidance that must be checked as a whole, not a design approval. One thing worth knowing before you rely on any figure: TEK17 is amended **section by section**, on its own schedule — each page on [dibk.no](https://www.dibk.no/) carries its own “Endringshistorikk” (amendment history), so two clauses in the same regulation can have been last updated years apart. And a real, structural chunk of the numbers a Norwegian house needs — foundation depth, footing width, concrete grade, rebar cover — aren’t in TEK17 at all: the regulation explicitly hands that work to the Eurocode design standards (NS-EN 1990–1999, with Norwegian National Annexes) rather than fixing a number itself. Always confirm the current wording of the section you’re relying on at [dibk.no](https://www.dibk.no/regelverk/byggteknisk-forskrift-tek17/) before you build to it. 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 - [Norway Minimum Roof Fall (TEK17 §13-12): The 1:40 Rule](https://www.chippy.tools/building-codes/no/roofing/minimum-roof-pitch/index.md): TEK17 §13-12 doesn't fix a roof-pitch number itself — it's a functional 'sufficient fall' clause. DiBK's own guidance beneath it gives one hard figure: 1:40 for membrane roofing. Tile and metal aren't numerically fixed here. - [Norwegian Foundation Depth & Width: Why TEK17 Sets No Fixed Number](https://www.chippy.tools/building-codes/no/footings/foundation-depth-and-width/index.md): TEK17 hands foundation depth, width, concrete grade and rebar cover to Eurocode design (§10-2) rather than fixing them itself — here's what that actually means on site. - [Norwegian Ramp Gradients: TEK17 §12-16](https://www.chippy.tools/building-codes/no/ramps/ramp-gradients/index.md): TEK17 §12-16 ramp rules: max gradient 1:15 (1:12 for a run under 3.0 m), landings, handrail and width — from §12-16. - [Norwegian Room Height, Light & Ventilation Rules (TEK17)](https://www.chippy.tools/building-codes/no/rooms/minimum-ceiling-heights/index.md): TEK17 sets a fixed 2.4 m ceiling height for habitable rooms but no minimum room area — here's what §12-7, §13-2 and §13-7 actually require. - [Norwegian Stair & Guard Rules: Going, Headroom, Handrails (TEK17)](https://www.chippy.tools/building-codes/no/stairs/stair-and-guard-requirements/index.md): TEK17's numbers for a Norwegian stair — 0.25 m minimum going, the 2R+G stair formula, 2.0–2.1 m headroom, and 0.9 m guarding — from §12-14 and §12-15. - [Norwegian Wet-Room Falls and Waterproofing: TEK17 §13-15](https://www.chippy.tools/building-codes/no/wet-areas/waterproofing-requirements/index.md): DiBK publishes wet-room fall and waterproofing guidance. Compare the shower options, leak-water rules and distinct edge-height datums before detailing the job.