Building Underground
in Mallorca

Spain's national building code governs all construction including underground structures. Key requirements include structural safety (DB-SE), fire safety (DB-SI), and habitability standards (DB-HS). Our designs exceed CTE minimums in all categories.

Required from the local Ajuntament (town hall) for any construction work. The application includes architectural plans, structural calculations, and environmental impact assessment. Processing time: 4–12 weeks depending on municipality.

Required for construction in or near protected areas (ANEI, ARIP, or Natura 2000 zones). The assessment evaluates impact on flora, fauna, water resources, and landscape. Our team manages the entire process with specialist environmental consultants.

The island's territorial plan (PTIM) defines land use zones: urban (urbano), developable (urbanizable), and rural (rústico). Underground construction is generally permitted in all zones, but rural properties have specific floor area limits (max 900 m² enclosed space).

Mallorca's water authority (ABAQUA) regulates any construction that may affect groundwater. Deep excavations require hydrogeological studies and may need dewatering permits. Our engineers design waterproofing systems that exceed regulatory requirements.

Properties near historical sites or within the Serra de Tramuntana UNESCO zone require additional heritage impact assessments. Underground construction can often be approved as it has minimal visual impact on the landscape.