French Building Code Staircase Regulations — The Complete Guide for Architects

Central spine staircase with oak treads and frameless glass balustrade — engineered to satisfy CCH dimensional requirements for habitation privée classification.

French staircase regulations are scattered across multiple legal texts — and that fragmentation is the single biggest source of confusion for architects, maîtres d'œuvre and developers working on residential and commercial projects in France. Unlike Germany's consolidated DIN 18065 or Spain's CTE DB-SUA, France distributes its staircase requirements across the Code de la construction et de l'habitation (CCH), specific NF standards, ministerial arrêtés on accessibility, and ERP-specific rules that vary by building type and category.

This guide consolidates everything into one reference — the dimensional requirements, the guard height rules, the accessibility provisions, and the critical distinction between habitation privée and ERP (Établissement Recevant du Public) that determines which set of rules applies to your project. Whether you're specifying a floating staircase for a Paris apartment, a central spine system for a Côte d'Azur villa, or a bespoke staircase for a commercial ERP space in Lyon, the regulatory framework is the same — it's just applied differently depending on classification. Continox supplies every staircase with a compliance schedule referencing the relevant CCH articles, NF standards and arrêtés for your specific project, alongside glass balustrade and balcony railing specifications to match.

The French Regulatory Framework — How It Fits Together

Here's the part that trips up even experienced French architects: there is no single "staircase standard" in France equivalent to Germany's DIN 18065. Instead, the requirements are distributed across several legal and normative texts that interact — and sometimes overlap — depending on the building's classification.

The CCH is the primary legislative framework for all construction in France. It doesn't contain detailed staircase dimensions itself — instead, it establishes the general safety obligations (Articles L.111-1 to L.111-4) and delegates dimensional specifics to implementing arrêtés and referenced NF standards. Think of the CCH as the "constitution" — it sets principles, and the arrêtés and NF standards provide the operational detail.

NF P 21-210 (escaliers en bois) provides dimensional guidance for timber staircases — riser/going ratios, headroom, width. While technically a timber-specific standard, its dimensional framework is widely referenced for all staircase materials in habitation privée. NF P 21-211 covers terminology. For steel and glass staircases, there is no direct NF dimensional equivalent — the industry references NF P 21-210 by analogy, supplemented by Eurocode structural design (EN 1993 for steel, EN 1991 for loading).

The arrêté du 20 avril 2017 (replacing the older 2006/2007 texts) sets accessibility requirements for ERP (public-access buildings) and parties communes of collective housing. This is where the 120 cm width, double handrails, contrasting nosings and other PMR (Personnes à Mobilité Réduite) provisions come from. For habitation privée (individual houses and private apartments), these accessibility requirements do not apply — a critical distinction that affects specification and cost.

Fire safety for staircases in ERP is governed by the règlement de sécurité contre les risques d'incendie et de panique dans les ERP (arrêté du 25 juin 1980, consolidated). This sets requirements for escaliers de secours (fire-escape stairs), dégagements (escape routes), encloisonnement (enclosure) and materials reaction-to-fire classification. For habitation privée, the fire safety framework is lighter — governed by the arrêté du 31 janvier 1986 for habitations collectives.

Central spine with integrated landing platform — a system that accommodates both habitation privée and ERP dimensional requirements depending on width specification.

Code de la Construction (CCH) — Core Requirements

The CCH establishes that every building must provide safe vertical circulation appropriate to its use and occupancy. The relevant articles for staircase design:

Dimensional Requirements — Habitation vs ERP

This is the table every French architect needs. The dimensional requirements differ significantly between habitation privée and ERP — and the going/riser relationship follows the Blondel formula (2h + g = 600–640 mm), which is France's equivalent of Germany's Schrittmaßregel.

Guard Heights & Balustrade Rules

French guard (garde-corps) requirements are governed by NF P 01-012 ("Règles de sécurité relatives aux dimensions des garde-corps et rampes d'escalier") — a standard that applies regardless of whether the building is habitation privée or ERP.

Glass Balustrade Specifics

For frameless glass balustrades in France, the glass must comply with NF EN 12150 (tempered glass) and NF EN 14449 (laminated safety glass). The standard specification for garde-corps vitré is VSG (verre feuilleté de sécurité) — laminated safety glass with minimum 1.52 mm PVB interlayer — meeting the impact-resistance requirements for garde-corps de protection against falling. Continox specifies all French glass balustrades to NF EN 12600 pendulum-impact test Category 1 (1B1) as standard.

Accessibility — Arrêtés & PMR Compliance

Accessibility requirements in France are driven by the arrêté du 20 avril 2017, which consolidates earlier texts and applies to all ERP (any category, any type) and parties communes of habitations collectives (apartment buildings with communal stairs). These requirements do not apply to the interior of individual private dwellings (maisons individuelles, appartements privatifs).

Premium central spine system — configurable with closed risers, double handrails and contrasting nosings for ERP compliance, or open-riser with single handrail for habitation privée.

Fire Safety — Escaliers de Secours & Dégagements

French fire-safety requirements for staircases depend on building classification. The two key texts:

ERP — Arrêté du 25 juin 1980

ERP staircases must satisfy dégagement (escape route) requirements: minimum width based on the number of persons to be evacuated (UP = unité de passage = 60 cm; 1 UP for ≤19 persons, 2 UP for 20–50, etc.), encloisonnement (enclosure) with fire-rated walls and doors for multi-storey ERP, and materials with specified reaction-to-fire classification. External fire-escape stairs (escaliers extérieurs de secours) must be in non-combustible materials — steel construction with galvanised finish is the standard specification.

Habitations Collectives — Arrêté du 31 janvier 1986

For collective housing (habitations collectives), the staircase in the partie commune must be enclosed in a cage d'escalier with fire-rated walls. The staircase materials themselves have no specific reaction-to-fire requirement beyond the general CCH safety obligation — meaning steel, glass and timber staircases are all permissible provided the enclosing structure meets the fire-rating specification.

ERP Classification — What Changes

ERP (Établissement Recevant du Public) classification is governed by CCH Articles R.123-1 to R.123-55. The classification determines which fire-safety, accessibility and dimensional requirements apply. For staircase design, the key variables are type (activity — J for residential care, M for commercial, W for offices, etc.) and category (1st through 5th, based on public capacity).

How Continox Handles French Compliance

Solid oak tread detail — every tread is manufactured to the exact going dimension verified against the Blondel formula for the project's specific classification.

Frequently Asked Questions

This guide is produced by Continox Technical Team for architects, maîtres d'œuvre and developers specifying bespoke staircases in France. Regulatory information reflects current CCH, NF standards and arrêtés. Final compliance verification and DAACT remain the legal responsibility of the project's French-registered architect.