In short: how the two documents differ
The certificado final de obra is a technical document: the architect and the site's technical director confirm that the house has been built in line with the approved project. The cédula de habitabilidad is an administrative document: the Generalitat de Catalunya confirms that the home is fit to live in. You need the first to obtain the second, and without the second it is hard to connect utilities, let or sell the house.
There is usually one more step in between: a notice or licence of first occupation filed with the town hall. The exact order and timescales depend on the municipality and are confirmed there or with a gestor.
Who signs the certificate and what goes with it
The certificate is signed by the dirección facultativa: the director de obra, usually an architect, and the director de ejecución, usually an aparejador or arquitecto técnico. It is normally endorsed by the relevant professional college. They sign once they have seen the building and the paperwork, not because the contractor phones them.
Alongside it you assemble the as-built documentation: drawings updated with changes made during construction, installers' certificates for electrics, gas, heating and air conditioning, test records for the services and material data. Without the electrician's certificate the final works certificate can still be signed, but the power cannot be connected. That is why these papers are collected as each stage finishes, not in the last week.
Departures from the design: the main risk at the finish
Over eighteen months to two years of building, the client nearly always changes something: moves a window, encloses part of a terrace, relocates the pool, adds a room in the basement. Minor changes are recorded in the final drawings. Substantial ones that alter volume, floor area or external appearance may require the licence to be amended before the final certificate is signed.
The worst time to discover this is when the house is finished. The technical directors will not sign off something that does not match the licence, and handover slips. So every change during construction should be raised with the architect as it happens and put in writing: that way it is clear what is fixed by updating drawings and what needs the town hall.
First occupation and the cédula: in what order
Once the certificate is signed, a notice or application for first occupation goes to the town hall, depending on local rules. Then the cédula de habitabilidad de primera ocupación is processed. In Catalonia it is a Generalitat document, and your architect or gestor will tell you exactly where to file it for your municipality.
Processing times and fees vary from place to place, so leave slack in the schedule between the end of the works and moving in. If you need the house by a fixed date, the start of the school year for instance, begin preparing the paperwork several months before completion, not after the last skip has gone.
Connecting utilities and registering the house
During construction the house usually runs on a temporary builder's supply. Permanent electricity and water contracts are set up by the utilities on the basis of the installers' certificates, and some of them also ask for the cédula or the first-occupation document. Without these, a family can end up moving into a new house still on the site meter.
In parallel the house has to be put on a proper legal footing. A notary executes the escritura de declaración de obra nueva terminada based on the final works certificate; it is then entered in the Registro de la Propiedad and the Catastro records are updated. You need this for a mortgage, a sale, an inheritance or insurance. Decide in advance who handles these steps: a notary, a gestor or a lawyer.
The Libro del Edificio and the owner’s file
Spain's Building Act (LOE) requires the owner of a new home to receive the as-built documentation, known as the Libro del Edificio. Keep it in one folder, on paper and digitally: the licence, the final works certificate, the cédula, final drawings, installers' certificates, equipment manuals and manufacturers' warranties, and photos of the services before the walls were closed.
The LOE also sets liability periods for those involved in the build: one year for finishing defects, three years for defects affecting habitability and ten years for the structure. To rely on them you need documents showing who did what. A file put together from the outset saves weeks when selling the house or dealing with an insurance claim.
How not to stall at the finish
Three rules that work on every house. Collect certificates as you go: when the electrician finishes, their document comes in. Raise changes with the architect when they happen, not afterwards. And agree early on who files the papers with the town hall and the Generalitat: the architect, a gestor or you.
On the house with a pool and solar panels that we delivered end to end between 2022 and 2024, there was more paperwork than usual: pool equipment, the inverter, the grid connection for the panels. Each of those installers issues their own pack, and it is exactly the one people end up chasing at the end if it is not collected on time.