Colmenar del Arroyo

Can you build a house on rustic land?

The Madrid region allows no new houses on rustic land. Restoring an existing or listed building is the way.

Ley 9/2001, art. 29. A town plan can be stricter.

Plan in force: Normas Subsidiarias (an older, simpler plan), from 1988. The region's planning viewer ↗

The national urban information system (SIU) maps the land class for 100% of the municipality.

Only the town hall can confirm it, in writing: ask for a certificado urbanístico.

Is there water?

IGME records 8 wells and boreholes in Colmenar del Arroyo. Half of the 8 with a depth found water at 4–6 m. 2 springs are recorded.

Ground: 75% practically impermeable; 23% porous aquifer, medium productivity.

Choosing where to drill takes a hydrogeologist.

What to watch for

• One fire since 2016 reached the municipality: 19,939 ha, in 2026.
• 0.7% of the municipality lies in the 100-year flood zone; 0.7% in the 500-year one.
• 100% of the municipality is Natura 2000: new works need the region's consent.
• Radon zone II: new and restored homes need radon protection by law.

Living here

• 4G reaches 100% of homes; fibre 81%. Averages for the municipality.
• Rain: 484 mm a year (1971–2000), about 451 by 2041–2070.
• Summer highs: 30.7 °C, about 34.9 °C by 2041–2070.
• Frost days: 39 a year, about 18 by 2041–2070.

Around it

Navas del Rey · Chapinería · Fresnedillas de la Oliva · Robledo de Chavela · Villamantilla · Navalagamella