Due Diligence

Licences and Permits to Renovate a Home

Renovating without the right permits can lead to penalties and problems when selling. We explain what you need depending on the works.

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Due Diligence · Updated January 2026 · 5 min read

Before renovating, it is worth knowing what permits the works require. In Barcelona, the type of procedure depends on the scope of the renovation.

Minor vs. major works

Minor works: renovations not affecting structure, façade or relevant layout. A prior notification or a simplified licence usually suffices.
Major works: affecting structure, volume, façade or use. They require a works licence and, usually, a stamped technical project.

The owners' community

If you touch common elements (façade, courtyards, drainpipes) or open openings, you will need the community's authorisation, in addition to the municipal permit.

Risks of renovating without a licence

Penalties and a restoration order (undoing the works).
Problems when selling: discrepancies with the Registry and Cadastre.
Works ending up unlegalised.

We guide you on the procedure and authorisations before you start.

Frequently asked questions

We answer your questions

Do I need a licence to renovate the bathroom or kitchen?

For a minor renovation not affecting structure, façade or relevant layout, a prior notification or simplified licence usually suffices. If it affects structure or common elements, a works licence is needed.

What happens if I renovate without a licence?

You may face penalties and a restoration order (undoing the works), plus problems when selling due to discrepancies with the Registry and Cadastre. It is best to process the permits beforehand.

About to renovate your home?

We advise you on the necessary licences and the community's permits before you start the works.

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