What to Expect When Renovating a Villa on the Costa Blanca
Renovating a villa on the Costa Blanca usually runs in five stages: a technical inspection, a decision on permits, a phased quote, the works themselves, and a formal handover. The villa itself brings extra issues that an apartment does not: flat roofs and terraces, pools, private drainage, awkward plot access and a building season shaped by heat and autumn storms. This guide sets out what each stage involves, where the money and time go, and where owners most often get caught out.
Key Takeaways
Inspect before you design. Villas built before 1990 often have no thermal insulation and obsolete electrics, and damp or roof problems change the budget more than any finish does.
Interior work such as kitchens, bathrooms and flooring is usually minor works. Extensions, pools, structural changes and facade changes are major works and need a signed technical project and a municipal licence.
Allow weeks for planning and months for a technical project on larger jobs, then add time for weather and long-lead materials.
Budget for fees, licences, utilities and a contingency, not only for construction. Older houses reveal surprises once walls open.
Insist on an itemised, phased quote and a signed handover record before final payment.
Table of Contents
Start with a diagnosis, not a design
Most owners arrive with a picture of the finished kitchen or terrace. The more useful starting point is the condition of the building, because that determines what the picture costs.
Age matters. Inspections of Costa Blanca homes built before 1990 are strongly recommended because older rules may mean there is no thermal insulation and the electrical system is obsolete, with no differential switch or earthing. That single finding can turn a cosmetic refresh into a rewire.
A proper survey of a villa covers, in this order:
Structure: cracks, settlement, rusting reinforcement in balconies and slabs, and the state of any retaining walls on sloping plots.
Roof and terraces: the waterproofing membrane, falls towards drains, parapet junctions and flashings.
Damp: rising damp at ground level, condensation on north-facing walls, and infiltration around windows and terrace doors.
Installations: consumer unit, cable age, earthing, pipework material, water heater, and where the drainage goes.
Envelope: windows, shutters, insulation and the facade render.
Plot services: mains or well water, mains drainage or septic tank, and how a delivery lorry actually reaches the house.
Pro Tip: Photograph every wall, ceiling and meter before work starts and keep the files. They are useful for the quote, for any later dispute, and for the handover record.
If you are still deciding whether to buy, our guide on four checks before buying a property to renovate covers the survey questions before you commit. If you already own the villa, diagnosing first and comparing three quotes is the natural next read.
Permits and rules: minor works or major works
Spanish renovation work is generally split into two classes. Minor works cover internal refurbishment, kitchens, bathrooms, flooring, decorating and non-structural alterations. Major works cover extensions, pools, structural alterations, facade changes and new builds, and these need a full technical project prepared by the appropriate professionals.
Municipal ordinances follow the same logic. Under the general ordinances published by the Valencian administration, major renovations that modify structural elements or facades, or that enlarge an existing building, require a municipal licence and a technical project signed by a professional, while minor reforms may only need a declaration of responsibility. The exact paperwork, fees and timings differ between town halls, so the first step is always to ask the town hall for your specific address and work.
Two further points catch villa owners in particular:
Technical standards apply on top of permits. Refurbishments must respect urban-planning rules, and construction methods must follow the Technical Building Code. The code includes a basic protection against humidity requirement (HS 1), which is why waterproofing details on roofs, terraces and walls should be specified, not left to the installer’s habit. We explain this in coastal renovation and CTE moisture details.
Legal status of the building. For older buildings on urban or urbanisable land, an occupancy declaration may be available only if the use and building comply with planning and wastewater treatment, road access and drinking water are available. Before you plan an extension or pool, check with an architect or your town hall that the villa’s legal situation allows it.
If you live abroad, the approval question matters even more, since you will not be on site to notice a missing sign-off. See renovating a Spanish property from abroad.
How long it takes
Timelines depend on the class of work. Published local guidance gives these ranges: planning assessments take approximately 2 to 6 weeks, technical project preparation about 1 to 3 months for larger projects, and construction from several weeks for internal refurbishments to well over a year for new-build homes.
Translated into a typical villa:
Type of project | Permit route | What to expect |
Bathroom or kitchen replacement | Usually minor works | Weeks of work, little lead time before starting |
Repainting, flooring, doors, wardrobes | Usually minor works | Short programme, easily phased around other trades |
Full interior renovation with new electrics and plumbing | Depends on scope and town hall | Planning, then a programme measured in months |
Extension, pool, facade change | Major works | Technical project, licence, then construction |
New build | Major works | A year or more end to end |
These are ranges, not promises. Three things stretch them most: waiting for a licence, long-lead items such as made-to-measure windows and kitchens, and weather. Order long-lead materials early, confirm utility arrangements during construction, and allow extra time for weather delays, as the same local guidance advises.
What it costs, and what people forget to budget
Renovation prices vary by finish, size and condition, so a single per-square-metre number would mislead you. Our renovation cost guide for the Costa Blanca breaks down the drivers. What matters here is the shape of the budget.
Beyond the construction contract, plan for professional fees, planning charges, utility connections, surveys and certificates, landscaping, furnishing, VAT where applicable, and a contingency for unexpected work. Older properties may reveal hidden issues once work begins.
Where the money usually goes
In a villa the heavy items tend to be the ones you cannot see in a showroom:
Roof and terrace waterproofing. Large exposed surfaces under strong sun and sudden heavy rain.
Electrical and plumbing replacement. Chasing walls, replacing pipework and re-tiling afterwards multiplies cost, which is why it is cheaper to do these before finishes, not after.
Bathrooms and kitchens. Many fixtures, many trades, tiling and plumbing in a small space.
Windows and facade. Sizeable areas, scaffolding and licences where the facade changes.
Pool works. A separate job inside the same job, with its own structure, plant and drainage.
VAT: check before you assume
The general rate for renovation work is 21%, but the Spanish tax agency states that a reduced 10% rate applies to renovation and repair works on buildings mainly used as housing if the customer is an individual using the home privately and the building was completed at least two years before the works began. If the home is let out, even partly, the reduced rate does not apply. Materials supplied by the contractor also affect the rate above certain proportions, so ask for the VAT treatment to be stated on the quote and confirm it with your adviser.
Villa-specific issues that apartments do not have
Flat roofs and terraces
A villa on the coast is a large exposed surface. Cracked membranes, poor falls and badly sealed parapet junctions let water into ceilings below, often in the first autumn storms after a dry summer. A good terrace specification states the layers: substrate and falls, waterproofing membrane, protection layer, drainage and finish. Ask to see it in writing, and ask whether the guarantee covers the membrane or only the tiling.
Damp and salt air
Condensation, capillary damp and salt-laden air are everyday conditions near the sea. They affect plaster, paint, metalwork and joinery alike. Corrosion-resistant fixings and stainless steel in exposed areas, ventilated cavities and thermal breaks at cold bridges are the kind of details that separate a renovation that looks good in year one from one that still looks good in year ten. For apartments the same principles apply, as in our guide to modernising an older apartment in Torrevieja.
Pools, wells, septic tanks and drainage
Many villas sit outside the mains network or rely on a private tank. Before you plan a new bathroom, an extension or a pool, find out where the water comes from and where the waste goes, since both limit what you can add. An existing pool that leaks is worth diagnosing separately before it is built into the renovation budget.
Access and neighbours
Narrow urbanisation roads, steep drives and gated communities restrict deliveries and skips. Agree delivery access with neighbours where appropriate and tell the community administrator in advance, as it avoids stoppages that nobody budgeted for.
The building season
Summer heat slows outdoor work and many tradespeople and suppliers reduce activity in August. Autumn storms interrupt roofs and terraces. Spring is often the easiest window for exterior work, and interior jobs can run through the year. Plan the programme backwards from the date you want to use the house.
The mistakes we see most often
Designing before diagnosing. A finished-kitchen drawing does not tell you the roof is failing.
Comparing quotes that are not comparable. One quote lists every trade, another says “complete renovation” in one line. Ask each firm to price the same scope, itemised and in phases.
Treating the contingency as optional. Hidden issues in older villas are common enough that a reserve belongs in the plan from day one.
Starting major work before the licence is in place. The consequence can be stoppage and sanctions, and it can complicate a later sale.
Finishing before the installations. Tiling a bathroom and then rewiring behind it costs you twice.
Paying ahead of progress. Link payments to completed stages, not to the calendar.
Skipping the handover. More on that below.
Choosing who manages the work
A villa renovation commonly involves plumbers, electricians, plasterers, joiners, painters, air conditioning installers and sometimes a pool builder. The practical question is who coordinates them. You can hire each trade yourself, hire an architect to direct the work, or use one contractor to manage all trades. The single-contractor route is easiest for owners who live elsewhere, provided the quote is detailed and the contract states scope, price, stages and deadlines.
When shortlisting, ask for:
a written, itemised quote in phases;
proof of insurance and of the firm’s registration;
examples of finished villas, ideally in your area;
a named person who answers your messages, in your language;
how progress is reported if you are abroad.
Our checklist for shortlisting renovation firms goes through salt, permits and references in more detail.
Our perspective
We work on villas and apartments in Torrevieja and across the Vega Baja, and our advice is consistent: the cheapest quote is rarely the cheapest renovation. What protects an owner is a clear scope, a phased price and a firm that deals with permits, trades and waterproofing as one managed project, with insurance and regulatory compliance included.
In practice that means we start with a free consultation and a diagnosis, then provide a detailed quote broken into phases, so you can see what is structural, what is installations and what is finish. We would rather tell you that a terrace needs a new waterproofing system before the new tiles than quote the tiles and leave the leak for later. Owners who live abroad should expect the same discipline from any contractor: written scope, stage-based payments and a clear way to see progress.
— URU Reformas
Handover: closing the project properly
The last stage is the one most often rushed. Before closing, complete the final completion, certification and registration steps, and keep digital copies of permits, invoices, certificates and site photographs. Under Spanish construction law, reception of the work is the act by which the contractor delivers the finished work and the promoter accepts it, and it must be recorded in a document signed at least by both.
A sensible handover routine:
Walk the villa with your contractor against the original scope.
List every defect in writing, with photographs, and agree a date for correction.
Test everything: taps, drains, circuits, differential switch, air conditioning, shutters, terrace drainage with a hose.
Collect electrical and plumbing certificates, guarantees and appliance manuals.
Sign the reception record, then release the final payment.
If the villa will be a holiday let or second home, preparing a Costa Blanca holiday home covers what to do before the first guests or your first stay.
Planning your villa renovation with URU Reformas
We handle full and partial renovations, bathrooms and kitchens, plumbing, electrics, carpentry, painting, waterproofing, extensions and pools, all coordinated by one team. You can see the scope of our full renovation service, look at completed projects, or contact us for a free consultation and a detailed phased quote.
FAQ
Do I need a licence to renovate a villa on the Costa Blanca?
It depends on the work. Interior refurbishment such as kitchens and bathrooms is generally minor works, which may need only a declaration of responsibility, while extensions, pools, structural changes and facade changes are major works needing a licence and a signed technical project. Rules and fees vary by town hall, so confirm with the one for your address.
How long does a villa renovation take?
Internal refurbishments can take several weeks, while larger projects add 2 to 6 weeks for planning assessment and about 1 to 3 months for a technical project. New builds can run well over a year. Weather and made-to-measure materials are the usual causes of delay.
What is the most expensive part of a villa renovation?
Usually the work behind the finishes: roof and terrace waterproofing, replacing electrics and plumbing, and bathrooms and kitchens. Pools and facade changes add their own costs, plus licences and fees. Keep a contingency for hidden problems in older houses.
Can I manage the renovation from abroad?
Yes, if the scope, price, payment stages and reporting are agreed in writing. Choose a contractor who coordinates all trades, communicates in your language and sends progress updates, and arrange a final inspection, in person or by a trusted representative, before final payment.
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