Oña

Can you build a house on rustic land?

Castilla y León allows a new house on rustic land only when a farm needs it. Otherwise it has to go in a village, or restore a building.

Ley 5/1999, art. 23.1.e. A town plan can be stricter.

Plan in force: Normas Subsidiarias (an older, simpler plan), from 2009. 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 one well or borehole in Oña. Its depth: 250 m. One spring is recorded.

Ground: 36% practically impermeable; 35% karstic or fissured aquifer, high productivity; 13% low permeability, local groundwater only; 6.7% porous aquifer, high productivity; 6.7% karstic or fissured aquifer, medium productivity.

Choosing where to drill takes a hydrogeologist.

What to watch for

• One fire since 2016 reached the municipality: 86 ha, in 2026.
• 1.7% of the municipality lies in the 100-year flood zone; 2.5% in the 500-year one.
• 0.8% of the municipality is preferential flow zone, where new building is generally banned.
• 77% of the municipality is Natura 2000: new works need the region's consent.
• 56% of the municipality is a protected natural area, whose plan limits what can be done.
• Not a radon zone.

Living here

• 4G reaches 98% of homes; fibre 68%. Averages for the municipality.
• Rain: 527 mm a year (1971–2000), about 466 by 2041–2070.
• Summer highs: 25.3 °C, about 28.8 °C by 2041–2070.
• Frost days: 70 a year, about 46 by 2041–2070.

Around it

Navas de Bureba · Cillaperlata · Cantabrana · Frías · Los Barrios de Bureba · Salas de Bureba · Quintanaélez · Aguas Cándidas