Buying a flat in an old Barcelona building — and much of the Eixample, Gràcia or Ciutat Vella stock is over a century old — means inheriting the condition of the whole property, not just your unit. The ITE is the official X-ray of that structural health. Knowing how to read it saves you surprises worth tens of thousands of euros in building levies.
What the ITE is (and why in Catalonia it's called IITE)
The ITE (Technical Building Inspection) is a mandatory review of the condition of residential buildings, carried out by a qualified technician (architect or quantity surveyor). Its goal is to detect deficiencies that affect personal safety and require their repair.
In Catalonia, its own regulation calls it IITE (Inspecció Tècnica dels Edificis d'habitatges) and it's governed by Decree 67/2015. In everyday language, people in Barcelona still say "la ITE"; here we use both terms as synonyms.
Don't confuse the ITE with an inspection of your flat: the ITE evaluates the whole building — façades, roof, structure, common installations, courtyards — and it's commissioned by the owners' community, not by an individual flat owner.
When is it mandatory? Deadlines by building age
In Catalonia, residential buildings must undergo the inspection when they reach 45 years of age, and renew it periodically afterwards. The reference year is the construction completion date (the one listed, for example, in the Cadastre).
If the building was built 45 years ago or more, the ITE should already be done. A 1980 building entered the obligation in 2025; a 1975 one, a decade ago. The older it is, the longer it's been required — and the rarer it is that it still doesn't have one.
The regulation set out a staggered calendar by year of construction to give the oldest communities priority. As of today, virtually all stock built before 1981 is within the obligation. If you want the exact date for your case, it's worth confirming with the Agència de l'Habitatge de Catalunya or the city council.
If the building was supposed to have passed the ITE and hasn't, the community faces fines and, above all, may have pending repairs that will end up in building levies. You inherit that future cost as the new owner.
How it's done and who orders it
The process, simplified:
- The owners' community hires a technician (architect/quantity surveyor).
- The technician visually inspects the building and issues the technical inspection report, classifying any deficiencies detected.
- With that report, the fitness certificate is requested from the Agència de l'Habitatge de Catalunya.
- The fitness certificate is valid for 10 years (after which it must be renewed).
The cost of the inspection is borne by the community and divided among neighbors by share. For an average mid-sized building it usually moves in the range of a few hundred euros for the inspection itself; what's expensive isn't the ITE, it's the repair works it may require.
The fitness certificate and its deficiencies
The technical report classifies the building's condition according to the severity of the deficiencies. In summary:
| Classification | What it means |
|---|---|
| No deficiencies | The building is in good condition. Fitness certificate without conditions. |
| Minor deficiencies | Minor maintenance issues. Fit, with recommendation to fix. |
| Significant deficiencies | Require repair but no immediate risk. Usually requires a work plan and follow-up. |
| Severe / very severe deficiencies | They affect safety. They require urgent precautionary measures and a rehabilitation programme. The certificate may be provisional or the building may be ruled unfit until they are corrected. |
What matters to you as a buyer is not just whether the certificate exists, but what deficiencies it records and the status of the repair works. A building "fit with significant deficiencies" may have an approved façade levy halfway through.
Before signing, request from the seller or the administrator: (1) the current fitness certificate, (2) the full technical report with the deficiencies, and (3) the minutes of the latest meetings to see if there are approved or planned levies.
ITE, IITE and IEE: don't mix them up
Three acronyms that get mixed up:
- ITE / IITE: the technical building inspection (condition and safety). It's the one mandatory in Catalonia at 45 years.
- IEE (Building Assessment Report): a broader document that, beyond condition, also evaluates accessibility and energy efficiency. It's required in certain cases, especially when applying for public renovation grants.
- Energy certificate: a different thing — it's for the flat (or building) and indicates consumption, from A to G. Mandatory to sell or rent.
How it affects you when buying a flat
The ITE isn't abstract bureaucracy: it translates into money and risk. Three scenarios:
1. Building with a passing ITE and no deficiencies
The best case. The building is healthy and there are no pending repairs from the inspection. It's a plus for the property (and a seller's argument).
2. Building with deficiencies and an ongoing levy
Common in old buildings in Eixample or Ciutat Vella. The key here is who pays what: by law, levies approved before the sale belong to the seller unless agreed otherwise, but those approved afterwards are yours. Ask for the breakdown and use it to negotiate the price.
3. Building required to have an ITE that hasn't done it
Red flag. It may hide repairs that no one has wanted to face. Before buying, demand that the community regularizes the situation or adjust the price factoring in the likely cost.
The first piece of data you need is the real age of the building. It's in the Cadastre and free. With that you already know whether the ITE is required or when it will be — and whether you fall into the aluminosis risk window.
ITE and aluminosis: the Barcelona connection
Aluminosis is a pathology of concrete made with aluminous cement, used in construction roughly between 1950 and 1977. Barcelona and its metropolitan area have thousands of buildings from that era. A well-done ITE on a building of that period should pay specific attention to the structure.
If the building you're interested in is from those years and the ITE detects structural deficiencies, a specific structural report is advisable before buying. Not every building of the era has aluminosis, but the risk justifies checking.
Find out the age and condition of your flat, free
Type the address and our analyzer tells you the year of construction according to the Cadastre, whether the ITE is mandatory, whether it's in the aluminosis or asbestos risk window, and builds you a checklist to negotiate. No registration.
Analyze my flat →Where to verify a building's ITE
To confirm whether a building has the fitness certificate and its status:
- Agència de l'Habitatge de Catalunya: the body that issues and registers fitness certificates.
- The building's property administrator: holds the report and the minutes with any levies.
- The seller: request it in writing as a precondition to signing the deposit agreement.
Frequently asked questions
From how many years is the ITE mandatory in Barcelona?
In Catalonia, from 45 years of building age, with periodic renewal thereafter. The reference year is the construction completion date.
Who pays for the ITE?
The owners' community. The cost of the inspection is divided among neighbors by share. Any works required by the ITE are also split via building levy.
Can I buy a flat in a building without an ITE?
Legally yes, the sale is valid. But if the building was required to and hasn't done it, you take on the risk of pending repairs and possible fines to the community. It's worth demanding it be regularized or adjusting the price.
How long is the fitness certificate valid?
The fitness certificate is valid for 10 years. After that the inspection must be renewed.
Is the ITE the same as the energy certificate?
No. The ITE evaluates the condition and safety of the building. The energy certificate measures consumption (A–G label) and is mandatory to sell or rent a home. They are different procedures.
How do I know if the building might have aluminosis?
Look at the year of construction: the aluminous cement risk window runs roughly from 1950 to 1977. If it falls there, ask for the structural inspection to consider it. You can see the year instantly in our flat analyzer.
Editorial notice. This guide compiles the framework of the technical building inspection in Catalonia (Decret 67/2015) as known on the update date (2026). Deadlines, classifications and procedures may change due to later regulation or municipal development. Listing Barcelona is an editorial, independent platform; this guide is informational and does not replace the opinion of a qualified technician or verification with the Agència de l'Habitatge de Catalunya.