Before buying a property to renovate on the Costa del Sol, always get a structural survey, request the nota simple (land registry certificate) to check for legal issues, and obtain an indicative renovation quote before committing to a price. Many buyers discover significant hidden costs — old plumbing, asbestos, illegal extensions — only after purchase.
Why buy to renovate on the Costa del Sol?
Buying a property to renovate on the Costa del Sol offers one of the clearest routes to building significant equity in a market where move-in-ready properties command a premium. An older apartment or villa in a well-located area — Fuengirola, Benalmádena, Marbella's eastern urbanisations — bought at a discount and renovated to a high standard can be worth considerably more than the purchase price plus renovation cost combined.
The strategy is common among both expats relocating to Spain and investors buying to let or resell. The approach is sound provided the renovation costs are properly estimated before purchase, not after. This is where most buyers make their critical mistake.
Structural checks before making an offer
The two most important structural assessments before committing to a purchase are: a visual inspection of the roof, terraces and any flat areas where water can pool; and a check of all wet areas (bathrooms, kitchen) for signs of historic leaks or dampness. Both are cheap to identify and expensive to remediate if missed.
In addition to a general survey, ask specifically about: the state of the electrical installation (pre-2000 properties often have obsolete systems requiring full rewire), the type of plumbing (galvanised pipes corrode and must be fully replaced), and any structural modifications the previous owner may have carried out — particularly wall removals, which may or may not have been done with the correct permits.
Legal checks: nota simple and licencias
Before making any offer, request a nota simple from the land registry (Registro de la Propiedad). This document confirms ownership, any debts or charges on the property, and whether the built area matches what is registered. Properties on the Costa del Sol sometimes have extensions, pool houses or garages that were built without permits and are not registered.
Unregistered construction creates complications when you come to sell and can make it impossible to get a mortgage. If the property has unauthorised works, you need to understand what it would cost to legalise or demolish them before factoring this into your offer.
Getting a renovation estimate before purchase
The single most important step when buying to renovate is obtaining an indicative renovation quote before you exchange contracts. This is not a full fixed quote — that requires the property to be yours and a complete site assessment — but an experienced contractor can give you a credible indicative range after a viewing.
This estimate should cover the full scope you are planning: new electrical installation, replumbing, bathrooms, kitchen, flooring, painting, and any structural changes. Include a 15–20% contingency for items discovered during works. For detailed cost benchmarks across renovation types, see our full renovation Costa del Sol guide.
Hidden cost factors to look for
- Asbestos. Properties built before the mid-1980s may contain asbestos in floor tiles, roof panels or pipe insulation. Removal requires specialist contractors and adds cost.
- Old galvanised plumbing. A full replumb of a 100 m² apartment adds €8,000–€15,000 to the renovation budget. Always check the pipe material in older properties.
- Electrical installation. Pre-1990 Spanish electrical installations are typically not to current standards. A full rewire adds €8,000–€20,000 depending on property size.
- Community restrictions. Some urbanisations restrict working hours, materials access or the types of renovation permitted. Check community rules before budgeting for a full renovation.
- Structural dampness. Ground-floor properties and basement garages in coastal areas can have chronic dampness issues that require tanking or waterproofing membrane installation.
How to budget your total investment
A simple formula for buy-to-renovate projects on the Costa del Sol: purchase price + renovation cost (including 15% contingency) + purchase taxes and legal fees (approx. 10–12% of purchase price) + carrying costs during renovation (mortgage interest or opportunity cost). The result should be comfortably below the estimated market value of the renovated property to make the project viable.
For a full overview of bathroom and kitchen renovation costs — typically the most significant line items in a residential renovation — see our dedicated guides: bathroom renovation Costa del Sol and kitchen renovation guide.