San Millán / Donemiliaga

Can you build a house on rustic land?

The Basque Country 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 2/2006, art. 28. A town plan can be stricter.

Plan in force: Normas Subsidiarias (an older, simpler plan), from 2013. 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 2 wells and boreholes in San Millán / Donemiliaga. Half of the 2 with a depth found water at 6–10 m. 43 springs are recorded.

Ground: 58% practically impermeable; 18% porous aquifer, medium productivity; 17% low permeability, local groundwater only.

Choosing where to drill takes a hydrogeologist.

What to watch for

• 4 fires since 2016 reached the municipality: 161 ha in all, the latest in 2026.
• No mapped flood zone (only studied rivers are mapped).
• 11% of the municipality is Natura 2000: new works need the region's consent.
• 2.2% 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 93%. Averages for the municipality.
• Rain: 1,068 mm a year (1971–2000), about 907 by 2041–2070.
• Summer highs: 22.9 °C, about 26.1 °C by 2041–2070.
• Frost days: 52 a year, about 30 by 2041–2070.

Around it

Barrundia · Zalduondo · Agurain / Salvatierra · Oñati · Iruraiz-Gauna · Asparrena · Alegría-Dulantzi · Arraia-Maeztu