Phased renovation in Spain: how to plan it
Renovating in phases is not renovating in pieces. The difference between the two is a plan — and it is the difference between spreading the cost and paying twice.
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Short answer
What is the right order for a phased renovation?
The right order for a phased renovation is: first everything hidden inside walls and floors — plumbing, wiring and any layout changes —, then the wet rooms (bathroom and kitchen), and finishes zone by zone at the end. Done in one go, a full renovation in Barcelona runs €780–€1,600 per m² and takes 10–14 weeks; phased, the same scope spreads over two or three years and is funded from income rather than credit. The golden rule: never lay a finish over an installation that a later phase will have to touch — that finish gets paid for twice.
Phase one is the least photogenic and the most important: nobody posts a picture of new wiring. But it is the only phase that, ordered wrongly, forces you to break what you have already paid for. The whole plan is built around one question: what has to be opened for each job, and what is already closed on top of it.
| Phase | What goes in | Why this order |
|---|---|---|
| 1. Installations and structure | Wiring, plumbing, layout changes | It is what forces walls and floors open |
| 2. Wet rooms | Bathroom and kitchen, complete | They concentrate installations and heavy work |
| 3. Finishes by zone | Floors, doors, wardrobes, painting | They rest on earlier work without breaking it |
Preparation
What each phase should leave ready for the next
The trick to an affordable phased renovation is not cutting scope: it is roughing in. Every provision costs little with the wall open and a lot with the wall closed.
Provisions you will thank yourself for
- Empty conduit running to wherever air conditioning, smart-home gear or a car charger will one day go
- Capped water feeds and drains where a second bathroom or the washing machine will eventually sit
- A consumer unit sized for the finished flat’s load, not the current one
- Reinforcement inside plasterboard walls where wall units or a television will hang
- Levels and falls for future showers resolved during the flooring phase
The document that holds it together
A final plan of the finished flat, even if the work takes three years. Every phase is contracted against that plan, not against the idea of the moment. Without a final plan, each phase makes decisions the next one regrets.
The legal layer
Permits, the cedula and the building — per phase
In Spain the paperwork follows the job, not the home. Splitting the work changes how the permits, the habitability certificate and the building itself see your renovation.
Three things to know
- Most interior works in Barcelona are filed with the town hall as an assabentat or comunicat previ — a works notification per job, not per home. Each phase files its own, and any phase touching structure needs a technical project signed by an architect
- The cedula de habitabilidad is the certificate that makes a flat legally habitable — you need it to rent or sell. Plan the sequence so the flat never loses a working bathroom, kitchen and safe installations if you intend to let it between phases
- The comunidad de propietarios — the owners' association that runs the building — meets your works three times instead of once: lift protection, rubble down the stairwell and noise hours are negotiated per phase
From abroad
Running a phased renovation remotely
Phasing suits remote owners: each phase can be timed to a tenancy gap or a visit, and the flat earns between phases. But distance makes the record-keeping non-negotiable.
What keeps a remote phase honest
- Photos of every open wall and floor before it is closed — the memory the next phase, or the next contractor, will rely on instead of reopening things to check
- Payments by milestone against photo evidence, never large sums up front
- Keep the boletin — the electrician's official certificate — after the wiring phase: the utility company will ask for it when the supply contract changes
- Time the noisy phases for when the flat is empty: demolition and installations are the hard weeks, zone-by-zone finishes are liveable
If you change contractor between phases
The new company will not guarantee what it cannot see. Hand over the open-wall photos, the final plan and the installation certificates: with that record it can continue without reopening finished work or padding the quote defensively.
Frequently asked
Common questions
Installations and layout changes: everything that forces walls and floors open. Then bathroom and kitchen, and finishes last. The test for every decision: never cover with a finish anything a later phase will need to open.
For the same scope, somewhat: each phase repeats protection, travel and cleaning, and material prices move between phases. The premium is offset by funding the work from income — and it only balloons when the order is wrong and work has to be redone.
As long as your budget needs — months or years. What matters is not the calendar but the final plan each phase is contracted against, and the photos of open walls that serve as memory for the next one.
Yes — town halls process works per job, so each phase files its own assabentat or comunicat previ, and a phase touching structure needs a signed technical project. Repeating the paperwork is one of the real costs of splitting the work.
Yes, and it is one of the main reasons remote owners phase the work — but the flat must keep the conditions of its cedula de habitabilidad: a working bathroom, kitchen and safe installations. Plan the sequence so no phase leaves it uninhabitable at a handover date.
Next step
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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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