Types of Building Permits
Spain distinguishes between two main categories of building work, each requiring different permits:
Obra Mayor (Major Works)
Required for structural changes, new construction, significant extensions or changes to the building's footprint. This includes:
- New builds and full renovations
- Adding rooms, floors or extensions
- Structural modifications (removing load-bearing walls, new openings)
- Swimming pool construction
- Changes affecting the building's facade
An obra mayor licence requires a project signed by a qualified architect (arquitecto) and a quantity surveyor (aparejador). Processing time: 2 to 6 months depending on the municipality.
Obra Menor (Minor Works)
Covers non-structural improvements that do not alter the building's footprint or load-bearing elements:
- Kitchen and bathroom renovations
- Painting, tiling, flooring
- Replacing windows and doors (same size openings)
- Electrical or plumbing updates within existing walls
An obra menor licence is simpler. You typically need a basic technical report (memoria técnica) rather than a full architectural project. Processing time: 2 to 6 weeks.
The Permit Process
Step by step:
- Hire an architect: For obra mayor, you need a licensed architect to design the project and produce technical drawings.
- Visado colegial: The architect's professional body (Colegio de Arquitectos) must stamp and approve the project.
- Submit to the town hall: File the application at the urbanismo department of your local Ayuntamiento.
- Pay the licence tax (ICIO): The Impuesto sobre Construcciones, Instalaciones y Obras is typically 2% to 4% of the construction budget.
- Wait for approval: The town hall reviews the project against the local urban development plan (PGOU).
- Start building: Only after receiving the written licence. Keep the licence on-site during construction.
- Final inspection: The town hall inspects the completed work and issues a certificado de final de obra.
Costs
Budget for these expenses:
- Architect fees: 6% to 12% of construction cost for a full project
- Aparejador fees: 3% to 5% of construction cost
- ICIO tax: 2% to 4% of construction budget
- Town hall licence fee: varies by municipality, usually €200 to €2,000
- Colegio de Arquitectos stamp: €300 to €800
Building Without a Permit
This is a serious mistake. Consequences include:
- Fines of €600 to €300,000 depending on severity
- Demolition orders for structures built without permission
- Inability to register the work in the Land Registry
- Problems selling the property later
- Insurance claims denied for unpermitted work
If you are buying a property with recent construction work, always ask to see the building licence and final certificate. Use our free calculator to estimate your total costs including renovation budgets and permit fees.