Renovating a villa in Marbella: licences, phases and budgets

Which works need which permission

Spanish building law separates works that alter a building in an essential way from everything else. If you change the structure, add volume, significantly alter the exterior composition of the house or change its use, the project needs a design by an architect and a major works licence (licencia de obra mayor) from the town hall.

Smaller works without structural impact, such as new bathrooms, a new kitchen or flooring, usually follow a simpler route: a minor works procedure or a sworn declaration (declaración responsable), in which you notify the town hall and confirm compliance instead of waiting for a licence. LISTA, Andalusia's planning law (Ley 7/2021), also replaced many first-occupation licences with such a declaration. The municipal rules decide the category of each job, so ask your architect before you sign with a builder.

Close to the beach, the Coastal Law (Ley de Costas) restricts building near the shore and can limit work on an existing house. Elsewhere, what you may add depends on rules derived from the 1986 general plan, to which Marbella returned after the Supreme Court annulled the 2010 plan in 2015, while a new plan is in preparation.

Your team: architect and technical architect

A project that needs a major works licence must be designed and signed by an architect (arquitecto), who also directs the works. Most also need a technical architect (arquitecto técnico or aparejador), who supervises construction, materials, quality and costs on site. Where several contractors work on site, a health and safety coordinator is also required.

Choose an architect who knows the Marbella town hall and the rules of your urbanisation, since gated estates may have their own design guidelines. Ask to see finished renovations, not only renderings, and agree in writing what the fee covers, from the first survey to the final certificate.

The phases of a renovation

A full renovation follows a predictable sequence, even if the time each step takes varies widely.

• Survey: measurements, a check of structure, roofs and installations, and a comparison of the house with its licences, cadastre and registry entries.
• Design: a basic project for the licence application, then a detailed execution project with drawings, specifications and quantities.
• Licence: application, technical review by the town hall, payment of the construction tax and fees, and any reports from other authorities.
• Tender: bids from several builders on the same execution project, so prices can be compared line by line.
• Works: demolition, structure, roofs, installations, joinery and finishes, supervised by the architect and the technical architect.
• Final certificate: the certificate of completion (certificado final de obra) signed by the technical team, followed by the occupation procedure where it applies.
• Cadastre and registry: updating the house in the cadastre (Catastro) and the land registry, usually through a notarial deed for the new or enlarged building.

Timelines and budgets in general terms

Licences in Marbella can take months, depending on the project, the completeness of the file and the town hall's workload. Design, tender and construction add their own time, so for a full renovation of a large villa it is wise to plan in terms of a year or more from first survey to final certificate.

Costs depend heavily on the level of finish. Natural stone, large-format glazing, bespoke joinery and integrated technology raise the budget quickly, and a full high-end renovation that strips a house back to its structure can approach the cost of a new build. Add professional fees, municipal taxes and a contingency for what appears once walls and floors are open.

If the structure is weak, the layout fights the plot or the planning rules allow more than the existing house uses, demolition and a new build may be the better route. The comparison of new-build and resale villas helps you weigh the two.

Pools, windows and the building envelope

Older pools often need new waterproofing, filtration and pumps, and many owners switch to salt chlorination or add a heat pump to extend the season. Resurfacing and new equipment are usually straightforward; building a new pool, enlarging one or moving it counts as construction and needs the corresponding permission.

Windows are where comfort is won or lost. Insulated glazing in thermally broken frames, with solar control glass where the sun is strongest, tames both summer heat and winter draughts, and the article on orientation, light and terraces shows which facades need it most. New or larger openings change the facade and usually mean major works.

Insulation starts with the roof, which takes the most sun, then the walls. External insulation gives the best result but changes the exterior and needs permission, while internal insulation is simpler but costs floor space. In this climate, keeping heat out in summer matters as much as keeping it in during winter.

Climate, energy and technology

Heating and cooling are now often combined in an air-to-water heat pump (aerotermia) feeding underfloor heating and cooling, fan coils or ducted air. Place the outdoor units early, away from bedrooms and neighbours.

Solar panels suit a coast with long hours of sunshine and can cover a useful share of daytime consumption, from pool pumps to air conditioning. The town hall or the statutes of a gated urbanisation may regulate where they go and how visible they are, so plan them into the design rather than adding them later.

Home automation is easiest to install while walls are open. A wired network and central control of lighting, shading, climate, irrigation and security are increasingly expected in a high-end villa. Choose widely used systems that local installers can maintain, with full documentation at handover.

Illegal extensions and AFO status

Many older villas have grown over the years: a closed porch, an extra bedroom, a guest house or a pool house built without a licence. Before you design anything, your architect and lawyer should establish which parts of the house are legal, as set out in the guide to due diligence and licences.

Parts that are irregular but past the enforcement deadline can obtain AFO status (asimilado a fuera de ordenación). They may then remain, but what you can do with them is limited: in general terms, works that keep the building safe and usable are possible, but enlargements are not. A licence application puts the whole house under scrutiny, so know the position before you file one.

This article is general information about renovating a villa in Marbella, not legal advice; for your own project, consult an independent lawyer (abogado) and a qualified architect.