Barcelona renovation permit: how long it takes

If you are planning a Barcelona renovation, one of the first questions you will ask is simple:
How long does the renovation permit take in Barcelona?
The honest answer: it depends. And before I give you all details, let me introduce myself.

If you don’t know us yet, here’s a quick introduction: we are ERA architects. More specifically, I’m Esther Rovira, an architect and passive house designer based in Barcelona and Catalonia, specialising in the construction and renovation of passive and energy-positive homes. In this post, “Barcelona renovation permit How long it takes”, we walk you trough the system used to define the process you you understand what to expect. So, let’s go!. Here what you’ll find here:

INDEX

• Intro
• The “Previous Consultation” system
• Types of Barcelona renovation permits
• Structural walls: the hidden time factor
• Summary
• How to move faster
• My recommendation

INTRO

The Barcelona renovation permit depends on one key factor — the automatic system of the Ajuntament de Barcelona called “Previous Consultation” (Consulta prèvia).
This system defines which type of construction permit you need based on:

• The exact address of your property
• Whether the building is protected or not
• The neighbourhood (Eixample, Gothic Quarter, etc.)
• What exactly you plan to renovate
• Whether you change layout
• Whether you touch façades, patios, terraces or structure (changing window is considered touching façade)

Once you input the data, the city hall system automatically assigns the type of permit. That decision defines the timeline.

Below, I’ll break down each type of permit from the simplest to the most complex, with realistic time expectations and direct insight from daily experience as a Barcelona architect working with homeowners and Barcelona contractors.

The “Previous Consultation” System

Before doing anything, your Barcelona architect or yourself must run the “Previous Consultation” on the City Hall website.
You must specify:

• Exact address
• Cadastral reference
• Type of renovation works: whether you change layout, touch structural walls, or modify windows or façades

The system automatically assigns one of the following procedures. There is no way around it.
This is why two identical apartments in different streets can have completely different timelines.

Types of Barcelona renovation permits (from fastest to slowest)

1) Assabentat (The simplest one)

When is it used?

• No layout changes
• No walls removed
• No structural modifications
• No exterior actions in any façade, terrace, patios

Typical for:

• Kitchen renovation
• Bathroom renovation
• Flooring replacement
• Interior finishes

Key characteristics:

• 100% online process
• Automatic approval
• No technical project required
• No review by Architects Institute
• No waiting period

Timeline:

• You can submit it online the day before starting the works
• This is the fastest scenario for a Barcelona renovation.
• If your project fits here, you’re lucky.

2) Comunicado Inmediato

This is where complexity begins.

Mandatory when:

• You change layout
• You remove at least one wall
• Your neighbourhood is not specially controlled
• The property is not under heritage restrictions

What you need:

• Technical project signed by a Barcelona architect or qualified technician
• Detailed structured documentation with chapters, tags and compliance statements
• Payment of 4% of the total renovation cost in taxes before you start construction

Who reviews it?

• ONLY the Col·legi d’Arquitectes de Catalunya (Architects’ Institute) or another qualified certifier

Real timeline:

• 15 days → Architect prepares the technical project (this excludes the design process)
• 15 days → for Architects Institute to review and approve
• 24hours → for your Architect to submit the approved project to City hall online system (unless their platform is giving errors which is the case usually)
• Total: 1 month to request permit only

This is the standard path for many Barcelona renovation projects involving layout changes IF not doing any exterior actions nor location is on a protected neighbourhood or building.

3) Comunicado Diferido

Same base as Comunicat Immediat, but now the City Hall district also reviews it during one more month.

Which properties are affected?

• Most properties in Eixample and Gothic Quarter
• Buildings considered “worth reviewing”
• Areas with stricter urban control

Who reviews it?

• Architects Institute
• City Hall district technicians

Timeline:

• 15 days → Architect prepares project (this excludes the design process)
• 15 days → Architects Institute review
• 30 days → City Hall district review
• Total: 2 months to request permit

This is extremely common in Eixample and Gothic district.
If you are renovating there, expect at least two months before starting.

4) Comunicado Diferido con Patrimonio

Now we enter heritage territory.

Which properties are affected?

• Building protected (building built in early 1900)
• Located in heritage-sensitive areas
• Interior elements protected
• Historical value involved

Who reviews it?

• Architects Institute
• City Hall district
• Heritage department

Timeline:

• 15 days → Architect prepares project
• 15 days → Architects Institute review
• 30 days → City Hall district review
• 30 days → Heritage department review
• Total: 3 months to request permit

And that’s assuming no corrections are required.
In Barcelona, many properties in central districts fall into this category.

5) Licencia sin Patrimonio

Now things get heavier.

This type activates automatically when:

• You alter exterior elements such as windows, façades, terraces or patios

What changes here?

• Full technical project required
• Façade drawings of entire building
• Detailed compliance reports
• Deeper revisions
• More urban planning documentation (full building drawings)

Timeline:

• Expect 4 months minimum

Often longer depending on district workload.
This is not a simple notification.
This is a full license procedure.

Many people underestimate this when doing a Barcelona renovation involving window replacements.

6) Licencia con Patrimonio

This is the most complex scenario.

Common when:

• Touching façades/patios/terraces in Eixample and Gothic Quarter
• Changing windows in protected buildings
• Any exterior change in heritage-listed property

Who reviews it?

• Architects Institute
• City Hall district
• Heritage department

But here is the real problem is they move paperwork back and forth when asking for more specifications.
So every time one department makes one requierement, even if your architect takes 24hours to reply; they will still look at it only after 1 month. Imagine this nightmare:

• Heritage makes a comment like, compare the next building facades frame color to your chosen one to give proof → 1 month (they take 1 month to send this comment)
• Architect replies → 24hr
• Heritage replies again → 1 month

This can easily become a 6-month process or more. It is a paperwork marathon.
If you are planning a Barcelona renovation in a heritage building, become a Yogi first to be a patience master.

Structural walls: the hidden time factor

If you plan to remove a structural wall, there is an extra layer to be added even before you ask for permit.

Neighbour approval

Before even applying for permit:

• You must inform the building community
• Your architect must prepare a structural proposal and send it to neighbours trough the building community
• Neighbours may hire their own architect to review it (or ask their many architect friends who have not built a thing in decades) (we just don’t respond to architects who are not the official building community architect because there is a clear conflict of interest and this is how we expose it later to neighbours making sure it’s included in the official meeting’s report)
• Usually a meeting with neighbours is organized with your Barcelona architect to expose the proposal, the comments of the neighbour’s architect and answer questions
• The neighbours must vote to confirm your proposal based on technical factors only
• You need at least 80% of owners in favour or not voting
• May owners vote without technical suported comments, you may suit them. This means starting a process of 2-5 years (this has happened us twice in a lifetime when we’re processing 50 of these every year)

The building administration (Administración de Fincas) manages this process. They are usually very unefficent.

Timeline:

• Around 2 months
• And this happens BEFORE permit submission

Many homeowners forget this step and lose time. In our architecture studio, this is the VERY first thing we do, sometimes even before we start the design process. Saving you re-doing the full process.

Summary: How long does a Barcelona renovation permit take?

Here is the realistic overview:

1. Assabentat → Immediate
2. Comunicado Inmediato → 1 month
3. Comunicado Diferido → 2 months
4. Comunicado Diferido con Patrimonio → 3 months
5. Licencia sin Patrimonio → 4 months +
6. Licencia con Patrimonio → 6 months +

Add 2 extra months if structural wall approval from neighbours is required.

And remember: These are timelines to OBTAIN the permit only — not to design your new layout, not to complete the renovation.

How to move faster (realistic advice)

You cannot hack the system. But you can avoid mistakes.

1. Keep your renovation simple

The more you touch:

• Structure
• Façade
• Terrace
• Windows

The longer it will take. If you can avoid modifying exterior elements, do it.

2. Hire a local Barcelona architect early

The “Previous Consultation” defines everything. Do not guess.
Let your Barcelona architect:

• Run the consultation
• Evaluate risks
• Define strategy
• Calculate taxes
• Estimate timeline

Without that, you are planning blindly. Focus on what’s important first. Dealing with new desing is exciting, but it won’t be a thing if you don’t plan accordingly with someone who knows the local rules and complex process.

3. Coordinate architect and Barcelona contractor

A professional Barcelona contractor must:

• Wait for correct permit to be approved
• Understand limitations
• Respect structural approvals and process
• Adapt execution to the license granted

Starting without permit can mean:

• Stop-work in the middle of construction
• Legal complications with neighbours

It is not worth the risk.

4. If structural walls are involved, talk to neighbours first

Do not design first and inform later. Instead:

• Hire a local architect who can sign and ask for permit
• Prepare structural study
• Inform building administration
• Be kind to neighbours while building consensus to get 80% approval (don’t tell them everything or it can get against you)

Neighbour opposition cannot only delay everything, but your renovation later will be a nightmare with constant complains that sometimes can stop the process.

My recommendation

You may already know that Spanish paperwork is illogical and complicated to move forward (remember your NIE process?).
So my #1 recommendation is simple:

Keep things simple — especially with paperwork.

The more complex the intervention, the longer the timeline. Before budgeting your Barcelona renovation:

• Ask a local architect to perform the “Previous Consultation”
• Confirm which permit applies
• Calculate realistic waiting time
• Plan your contractor schedule accordingly

Do not rely on assumptions. In Barcelona, the permit defines your timeline — not the construction itself. And everything starts with that automatic system. If you want clarity, start there.

Anecdote

Twice last year we’ve had clients calling us saying: I’ve already have the design, I just need to apply for permit ASAP and start renovation so I can move in in the next 4 months.
Both had hired other non-local architects for the design, spending 3 months designing and then when the permit time came, they disappeared with no clear explanaition.
Both of them had to wait for 8 more month before getting permit approval for a simple renovation with some structural reinforcement. Plus paying another local architect to drive them trhough the paper-to-reality process. I clearly remember the reaction of one of them when I explained the process to him: I’m in shock— he said.

I do recommend that you hire a local architect who speaks fluent Catalan who is also familiar to Barcelona city heritage process.

I hope this post, “Barcelona renovation permit: how long it takes”, helps you take the next step.
Did we miss anything? Any burning questions? Leave them in the comments and we’ll be happy to help.
You may also be interested in our other post: ‘Barcelona Architect’s Inspection’

See you on the next post,

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