Does Spain Have a National Minimum Room Height?

The requirement

Here’s the short answer: the CTE sets no national minimum ceiling height for a dwelling. There’s no single figure in the national building code you’re required to hit — and unlike Ireland’s TGDs, which simply leave the question open, Spain hands it to a different legal instrument entirely.

No fixed ceiling height in the CTE. A full search of DB-SUA, DB-SE-C and DB-HS turns up no habitable-room height minimum anywhere in the national code. The only height figure the CTE carries at all is DB-SUA 2’s headroom rule — 2.10 m in restricted-use circulation zones, 2.20 m elsewhere — and the Ministry’s own comment on that clause confirms it applies to circulation zones, hallways and landings, not to a living or sleeping room. Don’t read a headroom figure onto a bedroom ceiling.

Minimum ceiling height and room area are regional. Spain’s 17 autonomous communities each set their own minimum room height and floor area, in that region’s own decreto de habitabilidad — a habitability decree, not a Documento Básico, not amended alongside the CTE, and on its own numbering scheme. That’s genuinely out of scope for this page: with 17 separate decrees and no single national figure to report, picking one region’s number and presenting it as “the Spanish minimum” would be wrong for most readers. If your job needs a room-height or room-area figure, that’s a question for the habitability decree of the autonomous community you’re building in — not the CTE.

No national daylight minimum either. No window-area-to-floor-area ratio or daylight-factor rule was found in DB-HS or elsewhere in the CTE for a dwelling’s rooms. Like room height and area, a natural-light figure — where one exists at all — is regional-decree territory.

The one hard, national number: ventilation

Ventilation is where the CTE actually bites, nationally, for every dwelling in Spain. DB-HS, Sección HS 3 (“Calidad del aire interior”), Tabla 2.1 sets minimum constant-flow ventilation rates by dwelling size:

Alongside the table:

• 1.5 l/s per habitable room during unoccupied periods — a background/ purge-type minimum (§2, point 2).
• 50 l/s minimum kitchen cooking-zone extract, independent of the general ventilation figures above (§2, point 4).
• A design/derived criterion behind the table: mean annual CO₂ concentration under 900 ppm, with annual cumulative excess over 1600 ppm kept under 500,000 ppm·h (§2, point 1).

Work it out on site

Say you’re designing a 2-bedroom dwelling and need to check the ventilation totals. Floor area is 75 m².

1. Read the table for a 2-bedroom dwelling. Main bedroom 8 l/s, other bedroom 4 l/s, living/dining 8 l/s — a dry-room total of 24 l/s.
2. Add the wet rooms. A bathroom and a kitchen at 7 l/s each adds 14 l/s.
3. Add the kitchen extract separately. The 50 l/s cooking-zone extract is independent of the figures above — it’s on top, not folded in.

The 24 l/s dry-room total and 7 l/s-per-wet-room figures are Table 2.1’s own numbers; your real dwelling’s room count and layout will change which rows apply. There’s no calculator on this page for it — the ventilation table is a design input, not a single-number sum the way a stair riser or a concrete volume is.

Related

• Part of the Spanish Building Regulations hub — one national code, with the DBs that set the rules.
• Building the stairs, and need the headroom and step numbers? See Spanish stair & barrier rules: riser, going, handrails, guarding.

Sources

• CTE DB-HS — Salubridad, Sección HS 3 “Calidad del aire interior”, Tabla 2.1 (constant-flow ventilation minima), §2 points 1–2 (CO₂ design criterion, unoccupied-period minimum), and §2 point 4 (kitchen extract). Read it at codigotecnico.org.
• Regional habitability decrees. Minimum ceiling height, room area and (where it exists) natural light are set by each autonomous community’s own decreto de habitabilidad — a separate instrument from the CTE, not verified or enumerated here. Check the decree for the autonomous community you’re building in.

Read this first. These ventilation figures are from the current DB-HS articulado (Real Decreto 450/2022, de 14 de junio). Always confirm the current DB-HS text at codigotecnico.org before you rely on any figure here.