Key Takeaways
- ✓ Resale properties are 20–40% cheaper than new builds — a well-planned renovation can close the gap and add significant value.
- ✓ Full apartment renovation costs €400–€800 per m²; full villa renovation runs €500–€1,000 per m².
- ✓ Minor works (obra menor) need a simple municipal licence; structural changes (obra mayor) require an architect and full licence.
- ✓ Always get 3 written quotes, check the builder’s licence, and never pay more than 30% upfront.
- ✓ Budget 20–30% contingency on top of your renovation estimate — surprises are almost guaranteed in older Spanish properties.
Why Renovate in Spain?
Spain’s property market offers a compelling renovation equation. Resale properties (especially those built in the 1980s–2000s boom) are priced 20–40% below equivalent new builds, but with a well-planned renovation you can create a modern, personalised home at a total cost still significantly below new-build prices. On the Costa Blanca, a resale apartment at €120,000 plus a €30,000–€50,000 renovation gives you a finish comparable to a new build priced at €200,000+.
Beyond pure economics, renovation lets you choose your exact location (new builds are limited to where developers are building), customise the layout and finishes to your taste, and add features like a modernised kitchen, new bathrooms, or improved energy efficiency that both enhance daily living and increase resale value. See our new build vs resale guide for a detailed comparison of the two routes.
What Needs a Permit?
Spanish building regulations distinguish between two categories of work:
Obra menor (minor works) covers cosmetic and non-structural changes: painting, tiling, replacing kitchens and bathrooms (without moving plumbing), installing air conditioning, replacing windows (same dimensions), and updating electrical wiring. You need a licencia de obra menor from your municipality, which typically costs €100–€300 and takes 1–4 weeks to process. In some municipalities, a declaración responsable (responsible declaration) is sufficient instead of a full licence.
Obra mayor (major works) covers structural changes: moving or removing walls, extending the property, adding a new floor, converting a garage into living space, or installing a swimming pool. You need a full licencia de obra mayor, which requires plans drawn by a qualified architect (arquitecto or arquitecto técnico), project approval, and typically costs 3–5% of the construction budget in municipal fees. Processing takes 1–3 months.
Community permission: If your property is in a community (urbanización), any work that affects external appearance (windows, terraces, façade, roof) typically requires approval from the community of owners (junta de propietarios). Check the community statutes before starting. Some communities prohibit enclosed terraces or require specific colour schemes.
Renovation Costs: What to Budget
| Renovation Type | Cost Range | Notes |
|---|---|---|
| Kitchen (full replacement) | €5,000–€15,000 | Units, worktop, appliances, tiling, plumbing, electrics. IKEA kitchens available in Murcia and Alicante. |
| Bathroom (full replacement) | €3,000–€8,000 | Suite, tiling, plumbing, electrics. Walk-in showers cheaper than baths. |
| Full apartment renovation | €400–€800/m² | Kitchen, bathrooms, flooring, painting, electrics, A/C. A 70m² flat: €28,000–€56,000. |
| Full villa renovation | €500–€1,000/m² | Everything above plus exterior, roof, pool area. A 130m² villa: €65,000–€130,000. |
| New flooring (tiles) | €25–€60/m² | Porcelain tiles installed. Removing old tiles adds €10–15/m². |
| Air conditioning (split unit) | €800–€1,500 | Per unit, installed. Multi-split for 3 rooms: €2,500–€4,000. |
| New windows (double-glazed PVC) | €300–€600 each | Including frame and installation. Major energy savings in older properties. |
| Swimming pool (new) | €15,000–€25,000 | 6×3m concrete pool with filtration, tiling and surround. Obra mayor permit required. |
| Pool renovation (re-tile + equipment) | €5,000–€10,000 | Re-tiling, new pump and filter, LED lighting. |
| Solar panels (3–4kW) | €4,000–€7,000 | Including installation and battery storage. Reduces electricity bills by 50–70%. |
These figures reflect 2025–2026 market rates on the Costa Blanca and Costa del Sol. Northern Spain and the Balearic Islands can be 20–40% more expensive due to higher labour costs.
Finding Reliable Builders
Finding good tradespeople is the single biggest challenge of renovating in Spain. Here’s how to approach it:
Get recommendations. Ask other property owners, your community administrator, your estate agent, or local Facebook groups (in English, Finnish, Norwegian, etc.). Personal recommendations are more reliable than Google searches or flyers in letterboxes.
Get 3 written quotes. Every quote should itemise materials and labour separately. Vague quotes (“kitchen renovation €8,000”) invite disputes. A good quote details each task: demolition, plumbing, electrics, tiling, units, worktop, appliances, painting — with specific brands and specifications.
Check credentials. A legitimate builder should have an alta en autónomos (self-employed registration) or be registered as an SL (limited company). Ask for their CIF/NIF and check they have liability insurance. For obra mayor projects, you’ll also need a qualified architect or aparejador (technical architect).
Written contract. Always sign a contract specifying: scope of work, materials, timeline with milestones, payment schedule, penalty for delays, warranty period (typically 1–2 years on workmanship), and how changes/extras are handled.
Payment schedule. A fair structure: 20–30% upfront (materials), 30–40% at midpoint, and the final 30–40% on satisfactory completion. Never pay 100% upfront. The final payment is your leverage to ensure the work is finished properly.
Common Mistakes and How to Avoid Them
1. Underestimating the budget by 20–30%. This is almost universal. Older Spanish properties hide surprises: outdated wiring, corroded plumbing, damp behind walls, structural issues invisible until you open up the walls. Always budget a 20–30% contingency on top of quotes.
2. Not checking community rules. Enclosing a terrace, changing window colours, or adding an external air conditioning unit without community approval can result in fines and an order to remove the work at your cost. Check the statutes first.
3. Paying too much upfront. Stories abound of builders taking large upfront payments and disappearing or going bankrupt. Stage payments protect you. If a builder insists on 50%+ upfront, find another builder.
4. Skipping the architect for structural work. DIY structural changes without an architect’s project risk: unsafe results, no building licence, difficulty selling later (the work won’t match the catastral records), and potential fines. The architect’s fee (typically 5–10% of the construction cost) is money well spent.
5. Renovating before understanding the property’s problems. Before committing to a renovation purchase, pay for a building survey (€300–€500) by an independent surveyor or architect. This identifies structural issues, damp, termites, electrical safety, and plumbing condition. A €400 survey can save you €40,000 in unexpected costs.
6. Ignoring energy efficiency. Spanish properties built before 2006 typically have no insulation, single-glazed aluminium windows, and outdated A/C systems. Investing in double glazing, roof insulation and modern A/C can cut energy bills by 40–60% — a return that pays for itself within 3–5 years.
Renovation Timelines
| Project Scope | Typical Duration | Notes |
|---|---|---|
| Kitchen or bathroom only | 2–4 weeks | If no structural changes. Add 1–2 weeks for custom cabinets. |
| Full apartment (cosmetic) | 6–8 weeks | Kitchen, bathroom, flooring, paint, electrics, A/C. No structural work. |
| Full apartment (structural changes) | 2–3 months | Including moving walls, replumbing, new layout. Permit adds 1–2 months. |
| Full villa renovation | 3–6 months | Interior, exterior, roof, pool, garden. Permit + architect involvement. |
| New pool installation | 4–8 weeks | Excavation, construction, tiling, equipment, filling. Permit required. |
Important: Spanish builders rarely finish on time. Add 2–4 weeks to any quoted timeline as a realistic buffer. Summer (July–August) is particularly slow as many tradespeople take holidays.
Properties with Renovation Potential
Here are two resale listings currently available that represent strong renovation opportunities — well-located properties at below-market prices where targeted renovation could add significant value:
€132,0002-Bed Bungalow in Los Balcones
Torrevieja · Los Balcones
€138,9001-Bed Apartment in Centro
Torrevieja · Centro
The Los Balcones bungalow at €132,000 plus a €25,000–€35,000 renovation (new kitchen, bathroom, flooring, A/C, paint) would create a property comparable to renovated bungalows selling at €180,000+. The Centro apartment at €138,900 is in a prime location where renovated 1-beds command €160,000–€180,000 — making a €15,000–€20,000 renovation a sound investment. For the buying process, see our buying guide.
Our Recommendation
If you’re considering a renovation project in Spain, start with a realistic budget (add 25% to your first estimate), get three quotes, and always hire a qualified architect for anything structural. The best renovation investments are kitchens, bathrooms, energy efficiency (windows and A/C), and outdoor space (terraces and pools). If you’d like help finding the right renovation property, get in touch — we know which listings have the most potential.