Stair geometry limits under Eurocode / EN (estimate — national annexes govern), with the governing clause for each and a worked 9-foot example. Then run your own numbers in the calculator.
| Requirement | Limit | Clause |
|---|---|---|
| Max riser height | 7.48″ | national annex |
| Min tread depth | 9.84″ | national annex |
| Min stair width | 31.5″ | national annex |
| Min headroom | 78.7″ | national annex |
| Max rise between landings | 142.0″ | national annex |
For a 108-inch total rise under Eurocode / EN (estimate — national annexes govern): dividing by the 7.48-inch maximum riser gives a minimum of 15 risers. Spreading 108 inches evenly across 15 risers yields 7.2 inches per riser — within the limit and uniform, as the code requires.
Run your stair against Eurocode / EN (estimate — national annexes govern)
Across the EU, the dimensional geometry of stairs — maximum riser, minimum going, pitch, width — is set by each member state's national building rules and national annexes, not by a pan-European table. Germany's DIN 18065, France's national rules, and others each specify their own figures, and they differ. The figures shown on this page are an estimate of a typical Continental range and must not be relied on for a specific country.
What the Eurocodes do standardise is structural: EN 1991 (Eurocode 1) sets the imposed loads a stair and its landings must carry — for example characteristic loads for residential and assembly floors and their stairs — and EN 1995 and related parts cover designing the stair structure in timber, steel, or concrete to carry them. So a stair in the EU is typically sized geometrically to the national rule and checked structurally against the relevant Eurocode load case.
Practical takeaway: if you need a compliant stair in a specific European country, find that country's national annex or building regulation for the geometry, and use the Eurocode series for the structural loading. Treat any single "Eurocode" dimension as indicative only.
Compare with IRC 2018, IRC 2021, IRC 2024, IBC, UK Approved Document K, Australia NCC / BCA.