How comfort needs differ across Spain's regions

Key rules

• No transfer: Never apply one region's comfort criteria to another; each climate has different priorities.
• Atlantic north: Damp and mould come first, then moderate winter cold.
• Meseta: Insulation and effective heating come first, then summer heat.
• Mediterranean and Andalusia: Summer heat comes first, but mild winters can still feel cold in homes with poor insulation or no heating.
• Islands: The Balearics need checks for damp and heat; in the Canaries humidity, sun and ventilation matter more than heating.

Judge each home by its own region's priorities

Do not carry a checklist from one region to another. A feature that matters in Bilbao may be nearly irrelevant in Seville. Each region below has its own main problem and its own traditional building answer. Microclimates, altitude and orientation vary inside every region, so treat these as typical priorities, not guarantees.

Atlantic north: Galicia, Asturias, Cantabria, Basque Country

Priority: damp. Humidity and mould are the main risk all year, followed by moderate winter cold. Ventilation, dryness and good heating matter more than cooling.

• Look for damp patches, mould on walls and ceilings, and a dry, ventilated interior.
• Traditional homes have pitched slate or tile roofs, stone walls, galerías (glazed galleries) and glazed balconies, plus chimneys or stoves.
• Raised granaries called hórreos show how much ventilation counts here.

Meseta: Castilla y León, Castilla-La Mancha, Madrid

Priority: winter. Winters are long and harsh, with frost, and summers are hot and dry. Insulation and effective heating come first, then summer heat.

• Ask what heating the home has and how well the walls and windows keep heat in.
• Traditional homes have thick adobe, stone or brick walls, small windows, hearths and chimneys. Some have underground wine cellars.

Mediterranean coast

Priority: summer heat and humidity. Cooling and dehumidification matter most. Winters are mild, but homes often have no heating and feel damp-cold.

• Check orientation, cross-ventilation, shade and terraces.
• Check whether any heating exists at all.
• Traditional homes use whitewashed walls, persianas (shutters) and layouts that face away from the sun.

Andalusia

Priority: extreme summer heat, especially inland around Seville, Córdoba and Jaén. Winters are mild, but poorly insulated homes still feel cold.

• Look for thick walls, shade, small deep-set windows and a cool ground floor.
• Traditional homes have thick whitewashed walls, interior patios with plants or fountains, shutters and narrow shaded streets.

Balearic and Canary Islands

The two island groups differ, so do not treat them as one.

• Balearics: humid summers and damp winters, so check for damp as well as heat. Traditional homes have thick stone walls, cisterns and shutters.
• Canaries: mild temperatures all year, so humidity, sun and ventilation matter more than heating. Traditional homes have wooden balconies, patios and light-coloured flat or tiled roofs.

Traditional versus modern homes

The adaptations above describe older buildings. Newer homes follow the national building code's energy requirements, which depend on your town's climate zone. The zone is a code such as B3 or D1: the letter is winter severity and the number is summer severity. Examples: Bilbao C1, Madrid D3, Valencia B3, Sevilla B4, Las Palmas α3. Use the zone to compare homes within a region, not to carry criteria between regions. The documents block below explains how to find your zone.

For common questions, see the FAQ below.

Documents you need

• Find your home's climate zone code, such as B3 or D1, from the building code's zone tables or the transport ministry's municipality lookup. Use it to compare homes only within the same type of climate.

Frequently asked questions

How do I find the climate zone of my town in Spain?

You find your town's climate zone from the building code's tables, which give each place a code such as B3 or D1. The letter (from α, the mildest, to E) shows winter severity and the number (1 to 4) shows summer heat. Towns above their provincial capital's height get an altitude correction, and the transport ministry offers a lookup by municipality.

Can I use the same comfort checklist in Bilbao and Seville?

No, a checklist from one region does not carry over, because Bilbao is zone C1 and Seville is B4. In Bilbao, damp and mould come first, then good heating.

Why do old houses in each region look so different?

Old houses look different because each was built for its local climate. The Atlantic north used slate roofs, stone walls and glazed balconies, while Andalusia used thick whitewashed walls, shaded patios and shutters. Modern builds follow the national energy code instead, so check the actual insulation rather than assuming the style protects you.