Renovation
Renovating a Villa in Marbella in 2026: Costs, Risks and What Buyers Often Miss
Renovation is where the best value on the Costa del Sol is found and where the largest mistakes are made — usually by the same buyer, on the same property, six weeks apart.
Cet article n'est actuellement publié qu'en anglais.
Buying a dated villa in an established Marbella street is a rational strategy. Plot, position and mature garden are the things that cannot be created; kitchens and bathrooms can. The strategy fails when the renovation is priced as a decorating exercise and delivered as a construction project.
This guide separates the two, sets out where costs actually accumulate, and explains how to convert a renovation estimate into a maximum purchase price.
Two very different projects
Cosmetic refresh
Paint, floor coverings, kitchen and bathroom replacement in the existing positions, lighting, doors and soft landscaping. No structural change, no relocation of services, no licence beyond a minor works permission. Predictable, quick, and rarely the thing that goes wrong.
Major renovation
Layout changes, moving kitchens and bathrooms, new electrical and plumbing installations, new windows, roof and waterproofing work, terrace rebuilds, pool reconstruction, structural interventions. Requires professional design, a full works licence, and a contingency that reflects what you cannot see.
Where the money goes
Below is the full scope list for a typical 1980s–1990s Costa del Sol villa. The point is not that every project includes everything; it is that a budget missing several of these lines is not a budget.
Interior
- Kitchen: units, worktops, appliances, extraction, and the plumbing and electrical work behind them.
- Bathrooms: usually the highest cost per square metre in the house once waterproofing and tiling are included.
- Flooring: removal and disposal of old tile is a real cost, particularly over a screed that has to be relevelled.
- Internal doors, joinery and built-in wardrobes.
- Decoration: preparation on old plaster is where the labour hours sit, not in the paint.
Envelope and structure
- Windows and external doors: replacement to current thermal standards changes comfort and running costs more than anything else in the list.
- Roof: tile replacement, insulation, and the flat-roof waterproofing that older villas frequently need.
- Waterproofing generally — terraces, planters, retaining walls and pool surrounds are the usual sources of damp.
- Exterior render and paint, including crack repair.
- Structural work: beam repairs, corrosion in reinforced concrete near the coast, and interventions to open up a layout.
Technical systems
- Electrical: a full rewire with a compliant consumer unit and certification is common in properties of this age.
- Plumbing: old galvanised or early plastic pipework, hot water generation and pressure.
- Drainage: below-slab drainage failures are the classic unpleasant surprise.
- HVAC: air conditioning, heating and ventilation, including underfloor heating where the floor is coming up anyway.
- Home systems: data, lighting control, alarm, gates and cameras.
Outside
- Pool: structure, liner or tiling, plant room, filtration, heating and safety compliance.
- Terraces: substrate, waterproofing, paving and drainage falls.
- Retaining walls: on a sloping plot these are structural engineering, not landscaping.
- Landscaping and irrigation, plus mature planting if privacy matters.
- Driveway, gates and boundary walls.
Professional and administrative
- Architect and technical architect (aparejador) fees.
- Structural or specialist engineering where required.
- Municipal works licence and associated taxes on the works budget.
- Waste management, site facilities, insurance and health and safety coordination.
- Project management, if you are not living on site.
Professional fees, licence costs and site overheads together commonly add a meaningful percentage on top of the construction figure. A contractor's quote is not the project cost.
Why costs vary so much
Two apparently similar villas can produce quotes that differ by a factor of two. The drivers are consistent:
- 1Size: cost scales with area, but not linearly — bathrooms and kitchens are expensive per square metre, corridors are not.
- 2Specification level: the difference between a good standard finish and a luxury one is the single largest variable in the whole budget.
- 3Access: narrow hillside streets, no lay-down area and long carry distances add labour hours to every delivery.
- 4Structural condition: corrosion, movement and water ingress convert a refurbishment into a repair project.
- 5Hidden defects: what is behind the wall, under the floor and inside the terrace build-up.
- 6Technical systems: replacing a full electrical and plumbing installation is invisible in photographs and very visible in the invoice.
- 7Planning requirements: licence scope, timing and any legalisation work required before the main project can start.
- 8Design level: an architect-led reconfiguration costs more than replacing what is already there — and is often what makes the property worth more afterwards.
Budgeting in three scenarios
A single renovation number is a guess wearing a suit. Build three.
| Scenario | Assumes | Use it for |
|---|---|---|
| Low | No hidden defects; existing services reused; standard specification; no licence complications | Understanding the best realistic case |
| Expected | Normal discoveries for the property's age; partial services replacement; agreed specification; standard licence | Planning and financing |
| High | Structural or drainage surprises; full services replacement; specification creep; licence delay or legalisation work | Deciding the maximum price you can pay |
Note the third column. The high scenario is not a worst-case fantasy — it is the number your purchase price has to survive.
A worked example
Fictional, but built the way a real one should be.
| Line | Amount |
|---|---|
| Purchase price | €800,000 |
| Acquisition costs at approximately 9% | €72,000 |
| Renovation — low scenario | €135,000 |
| Renovation — expected scenario | €175,000 |
| Renovation — high scenario | €225,000+ |
| Total project cost at expected renovation | ≈ €1,047,000 |
| Total project cost at high renovation | ≈ €1,097,000+ |
Now the part buyers skip. If comparable renovated villas in that street complete at around €1,050,000, the expected scenario leaves no margin at all and the high scenario is a loss — before any allowance for time, disruption or finance costs.
That does not mean the property is unbuyable. It means €800,000 is the wrong price. Working backwards from a €1,050,000 finished value, a target margin, and the high renovation scenario produces a maximum purchase price — and that figure, not the asking price, is what you should be negotiating towards. The full framework is in the true cost of buying a renovation property and asking price vs fair value.
What buyers most often miss
- Legalisation before renovation: you may need to resolve an existing undocumented structure before the town hall will licence new work.
- Licence timing: a major works licence is not instant, and the property carries holding costs while you wait.
- The unglamorous 40%: waterproofing, drainage, rewiring and structural repair produce no photographs and consume much of the budget.
- Community rules: in gated developments and apartment buildings, works hours, summer restrictions and façade changes are governed by the community.
- Summer shutdowns and August: the coastal construction calendar is real and affects programme.
- VAT on works, which applies on top of contractor quotes given net.
- Furniture and fit-out, which are not part of the construction budget at all.
- Contingency: 10–15% of the works figure, held and not spent on upgrades.
Before you commit to a renovation purchase
- Independent technical inspection covering structure, roof, waterproofing, electrics, plumbing, drainage and pool.
- Measured built area from an architect, not the listing figure.
- Written low, expected and high renovation scenarios from a qualified professional.
- Confirmation of what the town hall will licence, and whether any legalisation is required first.
- Community rules on works, hours and external changes, where applicable.
- Comparable completed sales of renovated properties in the same street or pocket.
- A maximum purchase price derived from the finished value and the high renovation scenario.
- Contingency and holding costs written into the budget before you offer.
Where BuyerWingman fits
BuyerWingman builds renovation ranges from the property's actual evidence — photographs, documents, measured areas, the age and condition of technical systems — and carries those ranges straight into the valuation and deal analysis. Every deduction is traceable to the finding that produced it, so you can see why the number moved.
It is an analytical tool for buyers. It does not replace an architect, a technical architect, a structural engineer or a contractor's tender.
Cost figures in this article are indicative and illustrative. Marbella construction pricing varies widely by specification, access and contractor, and should be established with written quotations for your specific property.
Questions fréquentes
- How much does it cost to renovate a villa in Marbella?
- It depends far more on specification, structural condition and access than on floor area alone. Rather than relying on a headline rate per square metre, obtain written low, expected and high scenarios from a qualified professional for the specific property, and add professional fees, licence costs, VAT and contingency on top of the construction figure.
- Do I need a licence to renovate a house in Marbella?
- Minor cosmetic work generally requires a simple municipal permission, while anything structural, anything that changes layout, footprint or volume, and anything affecting the façade requires a full works licence with architect-prepared documentation. Confirm the requirement with the town hall or your architect before starting.
- What is the most commonly underestimated renovation cost?
- The invisible work: waterproofing, drainage, rewiring and structural repair. These consume a large share of the budget, produce nothing photogenic, and are the items most often discovered after the walls are opened.
- How much contingency should a Marbella renovation carry?
- 10–15% of the works budget is realistic for an older property where the structure has not been fully opened up. Treat it as reserved money, not as an upgrade fund.
- Should I renovate before or after moving in?
- For any major renovation, before. Living through structural work, rewiring and drainage repair is slower, more expensive and harder to manage than completing the works on an empty property — but remember to budget the holding costs of that empty period.
Note éditoriale
Cet article constitue une information générale, et non un conseil juridique, fiscal, technique ou d'évaluation. BuyerWingman ne remplace pas un avocat, un architecte, un expert du bâtiment, un ingénieur, un conseiller fiscal ou un expert évaluateur agréé — il vous aide à aborder ces échanges mieux préparé.
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