Deciding to carry out a partial or full home renovation is an exciting step. You imagine that open kitchen, a modern bathroom, or a brighter living room. But the big bureaucratic doubt arises: What building permits do I need in Barcelona? Do I risk a fine if I don't get a license? When is an architect mandatory?
At Bauen Ciment, as an expert construction company in Barcelona and Catalonia, we know that managing licenses can be confusing. That's why we have prepared this practical and direct guide for 2026, where we explain what procedures the City Council requires depending on the scale of your project.
Types of building permits and licenses at the Barcelona City Council (2026)
The City Council classifies building permits into three main categories (based on ORPIMO regulations) depending on the impact of the renovation on the home and the building.
1. Assabentat d'Obres (Notice of Works): Renovations without structural alterations
This is the fastest and simplest procedure. It is used to notify the City Council that you are going to carry out an aesthetic or maintenance renovation, without altering the layout of the home, intervening in load-bearing walls, or modifying the facade.
- •What works does it cover? Painting jobs, changing flooring, renewing kitchen or bathroom tiles, and updating electricity or water installations as long as they maintain their original layout.
- •Do I need a technical project? No, hiring an architect or technical architect is not necessary.
- •How much does it cost? The Assabentat is a tax-exempt procedure, completely free of charge.
- •Approval timeframe: Immediate online procedure. You get the receipt instantly to start working.
2. Comunicat d'Obres (Minor Works Notice): Layout changes
This permit is necessary when your full renovation involves changing the interior layout of the house (knocking down partitions), but without putting the load-bearing structure of the building at risk (beams or load-bearing walls).
- •What works does it cover? Knocking down a brick or plasterboard partition to join the living room and kitchen, relocating a bathroom, or modifying the layout of the rooms.
- •Do I need a technical project? Yes, it is mandatory to submit technical documentation (current and proposed state plans). The trick to save money: since it does not affect the structure, you do not need a Senior Architect; a Technical Architect (Aparejador) is sufficient, which considerably reduces fees.
- •How much does it cost? In addition to technical fees, you must pay municipal fees and the ICIO (Tax on Constructions, Installations, and Works). In Barcelona city, the ICIO is set at 4% of the Material Execution Budget (PEM).
- •Approval timeframe: Generally, it is processed as an "Immediate Notice". After submitting the suitable technical project, authorization to start work is immediate.
3. Llicència d'Obres Majors (Major Works License): Load-bearing walls and extensions
This is the strictest building permit. It is required for interventions affecting structural safety, protected heritage elements, facade alterations, or surface area increases.
- •What works does it cover? Demolishing or opening a hole in a load-bearing wall, enclosing terraces, full building rehabilitations, or making a change of use (e.g., transforming commercial premises into housing).
- •Do I need a technical project? Yes, it is imperative to hire a Senior Architect to draft a Major Works Technical Project endorsed by their College, plus a Technical Architect for execution management.
- •How much does it cost? It requires paying processing fees plus the 4% ICIO on the PEM (in Barcelona), added to the fees of the complete technical team.
- •Approval timeframe: Requiring exhaustive review by municipal technical services, the approval period usually ranges between 3 and 6 months (or more if there are additional requirements).
Frequently Asked Questions and Practical Renovation Cases
To clarify concepts, these are our clients' most common doubts before starting a project:
"I want to change the kitchen furniture and replace the bathtub with a shower tray." 👉 For this type of aesthetic renovation, you only need to process an Assabentat (free and immediate). (We invite you to read our Bathroom Renovation Pricing Guide and the Kitchen Pricing Guide).
"I want to knock down a partition to make the main bedroom larger or open the kitchen." 👉 You will need a Comunicat d'Obres. Our technical architect will verify that the wall has no structural function and draft the necessary technical file.
"I want to knock down a wall that seems to be load-bearing." 👉 It will be essential to request a Llicència d'Obres Majors. A structural project signed by a calculating architect must be submitted and await a favorable resolution from the City Council.
"At Bauen Ciment, we advise you from day one: we analyze your renovation, explain exactly what permits you need and how to apply for them, so the bureaucratic process is as simple and safe as possible."
Are you thinking of renovating your home in Barcelona? Contact us and tell us about your project. We'll be happy to help you understand what you need.
