Renovating without the right permits can lead to penalties and problems when selling. We explain what you need depending on the works.
Due Diligence · Updated October 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.
If you touch common elements (façade, courtyards, drainpipes) or open openings, you will need the community's authorisation, in addition to the municipal permit.
We guide you on the procedure and authorisations before you start.
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.
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.
Those affecting structure, facade, layout or installations usually require a licence; minor ones, a prior notification. The City Council determines the type according to the works.
For works inside your home that do not affect common elements, no; if they affect the facade, structure or common elements, you do need the association's authorisation.
You may inherit the problem: penalties, discrepancies with the Registry and difficulties selling or financing. Check the legality of the renovations before buying.
We advise you on the necessary licences and the community's permits before you start the works.
