Buying a flat in Barcelona to renovate: what to check
The problems that make a renovation expensive are visible before you buy — if you know where to look. Most buyers do not.
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The building
Check the building before the flat
Check the building before the flat, and get both numbers before you make an offer: purchase price plus a full renovation at €780–1,600 per m² — €62,400–128,000 for 80 m² over 10–14 weeks — plus taxes and a 10–15 % contingency. In anything built before the 1980s assume a full rewire at €4,000–7,500 as the baseline rather than an extra. The item that ruins the arithmetic is not inside the flat: it is an approved derrama, a levy voted by the owners association, which attaches to the property and becomes yours on the day you sign.
| What to check | Who to ask | Who pays for it | What it costs you |
|---|---|---|---|
| ITE, the compulsory building inspection | Administrador de fincas | All owners, by the coefficient in the deeds | A failed inspection with façade work pending is the big one |
| Approved or discussed derramas | Minutes of the last meetings | The current owner on paper, you in practice | A façade or lift levy can exceed a whole new bathroom |
| Soil stacks and risers | Administrador: when were they last replaced? | Community for the stack, you for your branch | €800–2,000 a section |
| Consumer unit and contracted power | Visible at the survey | You | €4,000–7,500 for a full rewire |
| Damp at skirting level | Survey, lower floors especially | Community if the source is façade, roof or foundations | Waterproofing from €95 per m² |
| No lift in the building | Obvious on the visit | You | €400–900 added to the works |
| Cédula de habitabilidad and listed status | Seller, then the council catalogue | You | No cédula, no letting and no utility contracts |
A perfect flat in a failing building is a bad purchase. The building is where the large, unavoidable costs live.
What to ask the seller or administrator
- Has the building passed its technical inspection (ITE)? Ask to see the certificate
- Are there approved levies (derramas) not yet paid or not yet started?
- Is there a lift, and if not, has installing one been discussed?
- When were the main stacks and risers last replaced?
- Are there ongoing disputes or leaks between flats?
- Is the building listed, and at what level of protection?
The one that costs most
A failed building inspection with façade work pending. That levy attaches to the flat, not to the seller, and can run to several thousand euros per property.
The flat
What to inspect inside
Bring someone technical. An hour of inspection changes what you should be willing to pay.
The checklist
- Consumer unit: is there an RCD, and how many circuits? A single circuit means full rewiring
- Contracted power supply: under 3.45 kW will not run an induction hob and an oven
- Damp at skirting level and in corners, especially on lower floors
- Rust stains or bulging on ceilings — corroding steel beams
- Floor level: significant slope suggests structural movement
- Window frames: no thermal break means high bills and condensation
- Where the soil stack runs — it governs whether the kitchen and bathroom can move
The habitability certificate
Ask whether the flat has a current cédula de habitabilidad. Without it you cannot let the property, and getting one may require changes to the layout.
Budget
What to allow for the renovation
Rough figures for Barcelona, so you can decide whether the purchase makes sense at the asking price.
Orders of magnitude
- Full renovation: €780 to €1,600 per m² depending on specification
- Bathroom only: from €3,200
- Kitchen only: from €4,500
- Add 10 % contingency in a period building
- Add permits, fees and, if applicable, pending building levies
The calculation that matters
Asking price plus purchase costs plus renovation plus contingency, against what comparable renovated flats in that street actually sell for. If the numbers do not work before you start, they will not work after.
Permits
What you will and will not be allowed to do
Worth knowing before you buy, because it determines whether your plan is even possible.
Usually straightforward
- Renewing bathroom, kitchen, services and finishes
- Removing non-structural partitions
- New flooring throughout
Needs a project and a licence
- Opening a loadbearing wall — technical project, calculations, steel and propping
- Anything affecting the façade, including external joinery on a listed building
- Work on communal stacks or risers — also needs owners association consent
- Changing the use of the property
The trap
Buying a ground floor commercial unit to convert into a home. Most cannot be converted: the constraint is usually natural light and ventilation, and no amount of building work fixes it. Check before you buy, not after.
Frequently asked
Common questions
The building first: technical inspection status, pending levies, condition of the stacks. Then the flat: consumer unit and contracted power, damp, ceiling rust stains, floor level, window frames and where the soil stack runs.
It is the compulsory technical inspection of the building. A failed inspection means works are due, and that levy attaches to the flat rather than the seller — it can run to thousands of euros per property.
Between €780 and €1,600 per m² for a full renovation in Barcelona, plus 10 % contingency in a period building, plus permits and any pending building levies.
Often not. The usual blocker is insufficient natural light and ventilation, which no amount of building work fixes. It has to be checked with the council before you buy.
To let the property, yes, and it must be current. Renovation can affect it: a room without a window does not count as a bedroom, which matters if you plan to subdivide.
Next step
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Clients
What clients say after their renovation
Rated 5.0 from 14 Google reviews. All real, from real projects.
★★★★★
“Doy un 10 la verdad con el servicio que me han prestado en una reforma de un piso en Barcelona capital, gente muy seria y responsable, gracias.”
Araks SahakyanJuly 2026
★★★★★
“Quedé encantada con la atención y la calidad del trabajo. Se nota que cuidan los detalles y cumplen con lo que prometen.”
Ana RiveraApril 2026
★★★★★
“Servicio muy profesional. Me explicaron todo con claridad y el trabajo quedó perfecto.”
Ana AlemanMarch 2026
★★★★★
“Si estas buscando profesionales responsables para hacer tu reforma, es el lugar indicado. Especializados en reformas integrales con la mejor atención personalizada. 100% recomendados.”
Daniel GarganoFebruary 2026
★★★★★
“Muy buen trabajo, ha realizado un trabajo muy profesional, ha cumplido en plazo y en calidad.”
Francisco PiñeirosAugust 2025
★★★★★
“Muy buenos profesionales, con excelente resultado.”
Esther DiezJune 2026
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