France's Minimum Ceiling Height: the 2.20 m Décence Rule

France sets no separate building-permit ceiling-height clause — but there is a real, citable floor: the 2.20 m 'décence' rule (Décret n°2002-120), plus the one hard number, ventilation.

Décret n°2002-120 du 30 janvier 2002; Arrêté du 24 mars 1982 Clause FR Décret 2002-120 Clause FR Arrêté 1982 Aération

The requirement

In practice, the minimum is 2.20 m for a main room (pièce principale). That comes from Article 4 of Décret n°2002-120 du 30 janvier 2002, the décence (decent-housing) rule. If the height is under 2.20 m, the room can pass instead with a habitable volume of 20 m³. France has no separate building-permit clause for ceiling height.

This “logement décent” (décence) rule is housing law, not a permit-stage design clause. It says when a dwelling is decent enough to rent out. Strictly, it is a tenancy and habitability floor. It is not a technical new-build clause, the way a Building Regs Approved Document might set one. But it is the number every French professional reaches for. No separate construction-stage figure exists. So use the 2.20 m figure. It is real, current, and citable. Just know what kind of rule it is.

Décret 2002-120 · art. 4 (décence)

Room size

The same Article 4 also sets a room size. At least one main room needs a habitable surface of 9 m². That room must also meet the 2.20 m height, or the 20 m³ volume instead. This decency floor bites on one main room only. The CCH sets no minimum floor area for every room in a house.

Natural light

Article 3 of the same décret covers light. It asks for “un éclairement naturel suffisant” (sufficient natural lighting). It also asks for an opening onto the open air. An opening onto a glazed space works too, if that space opens to the open air. But no fixed number is set. The decree has no glazing-to-floor-area ratio and no lux figure. Seen a ratio quoted for France? Treat it with care. We could not confirm one here.

The one hard number: ventilation

Ventilation is where French dwelling rules give you a real table. Article 3, arrêté du 24 mars 1982 (aération des logements) sets minimum mechanical extract flow rates. The rates go by the number of main rooms in the dwelling:

Main rooms	Kitchen (m³/h)	Bathroom/shower (m³/h)	Other water room (m³/h)	WC (m³/h)
1	75	15	15	15
2	90	15	15	15
3	105	30	15	15
4	120	30	15	30
≥5	135	30	15	30

Article 4 adds a reduced absolute floor for demand-controlled (modulating) mechanical systems. These boost on their own when needed. For 1 through 7 main rooms, the total permanent flow floor is 10/10/15/20/25/30/35 m³/h. The kitchen minimum over the same range is 20/30/45/45/45/45/45 m³/h.

Work it out on site

Say you are checking the extract numbers for a 4-main-room house. That is a typical 3-bedroom-plus-living-room dwelling.

Read the row. At 4 main rooms, Article 3’s table gives: kitchen 120 m³/h, bathroom/shower 30 m³/h, other water room 15 m³/h, WC 30 m³/h.
Add up the wet-room extracts. Do this if you are sizing one system. 120 + 30 + 15 + 30 = 195 m³/h. That is the total extract capacity to design for across the house’s wet rooms.
Check the modulated-system floor. Do this if you are fitting a demand-controlled system. At 4 main rooms, Article 4’s floor is a total permanent flow of 20 m³/h, with a kitchen minimum of 45 m³/h. That is much lower, because the system boosts on its own when needed.

Those are the real Article 3 and Article 4 numbers for a 4-room house. Got a different main-room count? Swap it in and read the matching row.

Part of the French building-codes hub. It shows how the décence rules, the accessibility exemption and the NF DTU standards fit together.
Guard-rail height for a landing or stair opening off one of these rooms? See French stair & guard-rail rules.

Sources

Décret n°2002-120 du 30 janvier 2002 (logement décent), art. 3 & 4 — ceiling height / habitable area / volume, and the qualitative natural-light requirement. Read it at legifrance.gouv.fr.
Arrêté du 24 mars 1982 (aération des logements), art. 3 & 4 — the ventilation flow-rate tables. Read it at legifrance.gouv.fr.

Read this first. The 2.20 m / 9 m² / 20 m³ figures above are from Décret n°2002-120, a décence (habitability) rule, not a free-standing building-permit-stage clause — its current text was updated by Décret n°2021-872 du 30 juin 2021, which also cross-references the recodified CCH’s Article R.156-1 for the surface/volume definitions used. A former CCH overcrowding rule (old article R111-2: 14 m² / 33 m³ for the first four occupants) was abrogated outright on 1 July 2021 with no direct numeric replacement found — don’t cite it as current. The ventilation table is from the arrêté du 24 mars 1982, as amended in 1983, and remains the current governing instrument. Always confirm the current text on legifrance.gouv.fr before you rely on any figure here.

Frequently asked questions

Does France have a minimum ceiling height for a house?

Yes, in practice: 2.20 m for a main room ('pièce principale'). That comes from Article 4 of Décret n°2002-120 du 30 janvier 2002, the 'décence' (decent-housing) rule. If the height is under 2.20 m, the room can pass instead with 20 m³ of habitable volume. No separate building-permit clause sets a height.

Is the 2.20 m figure a building code rule or something else?

It is a tenancy and habitability ('logement décent') floor, not a building-permit design clause. It says when a dwelling is fit to rent out. It is still the number every French professional reaches for, because no separate construction-stage figure exists. Use it, and know what kind of rule it is.

Is there a minimum room size in France?

The same décence decree asks for at least one main room of 9 m² habitable surface. That room also needs the 2.20 m ceiling, or the 20 m³ volume instead. It is a decency floor for one main room only. It is not a minimum floor area for every room in the house.

Do rooms need a minimum amount of natural light?

Article 3 of the same décret asks for 'sufficient natural lighting'. It also asks for an opening onto the open air, or onto a glazed space that opens to the open air. But no fixed number is set. The decree has no glazing-to-floor-area ratio, so treat any quoted ratio with care.

What ventilation numbers are actually mandatory?

The extract flow rates in the arrêté du 24 mars 1982. This is the one hard, table-driven number in French dwelling rules. A kitchen needs 75 m³/h in a 1-room dwelling, rising to 135 m³/h at 5 rooms or more. Bathrooms need 15–30 m³/h, depending on room count and layout. Full table below.