Costa Blanca Red Flags: A 2026 Property Buyer’s Checklist

Don’t let Spike choose your plot. A practical checklist, not a romcom.

Costa Blanca red flags come up in nearly every Spanish property file. Before listing them, a small piece of romcom.

Hugh Grant had Spike. The flatmate in his underpants who gives William the worst possible advice at every turn of the film. Charming, lovely, completely useless. Notting Hill is a great romcom because Spike is funny. Spanish property is not a romcom, and the Spikes you will meet on the way to a home in Costa Blanca are not funny at all.

The polite estate agent who has never read a Nota Simple. The neighbour who built a swimming pool without a licence and shrugs because “nothing happened”. The brother-in-law of a friend who “has seen this plot before”. The lawyer recommended by the seller, which is a sentence that should make any buyer very tired.

Charming people, almost always. No bad intentions. And almost no idea what they are actually talking about when it comes to the legal, technical and contextual reality of a Spanish property purchase.

This article is the layman’s checklist of what to look for before signing anything. Five red flags that appear in nearly every Spanish property file. Two bonus flags that became unavoidable in 2026. And, before that, a short piece of context that the Spike conversation tends to skip: why doing this checklist properly is what makes the Mediterranean dream survive the paperwork.

If you can read these Costa Blanca red flags calmly with a coffee, you are already ahead of most international buyers. Take notes.

Why Costa Blanca, and not Portugal, France or Italy

Before the red flags, the honest context. The article below lists a number of things that can go wrong in Spanish property. Read in isolation, it can sound like the whole country is a minefield. It is not. Every Mediterranean property market has its own paperwork. None of them are simple.

Portugal, for instance, went through a similar wave of foreign buyer interest until the Non-Habitual Resident tax regime closed in 2024. Similar listings, similar issues with undeclared extensions and rural land legalisation, and fewer English-speaking professionals outside Lisbon and the Algarve.

Italy, in contrast, has on average slower bureaucracy than Spain. The comune-level paperwork is fragmented across thousands of municipalities, and the famous “1 euro houses” usually come with renovation obligations that most British buyers underestimate.

France, meanwhile, has higher transaction costs (around 12 percent of the purchase price), a notary process that runs 4 to 6 months, and a market less geared to non-resident buyers in the under-700.000 euro segment.

Greece, finally, has a less developed property registry and a higher rate of title-chain irregularities, especially in islands and coastal areas.

Against that backdrop, Costa Blanca offers some specific advantages that explain why the British buyer keeps coming back. Spain has one of the most complete property registries in Europe. The Costa Blanca has an established international community going back to the 1960s, which means English-speaking lawyers, architects, notaries, doctors, gestores and surveyors are abundant. There are direct flights to most UK and Northern European cities every day. The public healthcare system is accessible to legal residents and pensioners on reciprocal agreements. And the price-to-climate ratio remains, even after the 2020-2024 increases, the best in the Mediterranean basin.

The paperwork is not a reason to choose another country. The paperwork is the reason the Spanish market is one of the safer Mediterranean options once you know how to read it. The Costa Blanca red flags below are not arguments against buying here. They are the procedure for buying here properly.

Why this paperwork exists (and why it protects you)

The Spanish property system has the Nota Simple, the Registro de la Propiedad, the Catastro, the Cédula de Habitabilidad, the PGOU and the Notario. From the outside, this looks like a wall of acronyms designed to confuse. From the inside, it is a set of protections for the buyer.

The Registro de la Propiedad protects ownership. The Catastro protects the tax record. The Notario protects the signing. The PGOU protects the urban order. The Cédula protects the habitability standard.

Therefore, when the British buyer learns to read these documents, the level of legal certainty available in Spain becomes comparable to (and in some areas better than) the equivalent system in the United Kingdom. The article below is how to use them.

Who handles what in a Spanish property purchase

A quick map of the professionals you may need, and what each one actually does. None of them does all of it.

The estate agent (agente inmobiliario) lists, shows and negotiates. In Spain the role is unregulated, so the quality varies enormously. Useful for finding the property. Not the source of legal or technical advice.

The lawyer (abogado) reviews the legal title, the contract of deposit (contrato de arras), the cargas in the Nota Simple, the community fees, the tax position and the final escritura. An independent lawyer (not the one suggested by the seller or the agent) is the minimum civilised infrastructure for a Spanish property purchase.

The architect (arquitecto) inspects the physical property against the original licence, reads the PGOU, calculates the buildable area after setbacks, identifies illegal extensions and assesses structural condition. In a context where 20 to 40 percent of Costa Blanca properties contain some form of undeclared construction, this is increasingly considered standard rather than optional.

The notario is impartial. The notary represents the procedure, not the buyer or the seller. The notary will sign the deed if the paperwork is in order on the day, regardless of whether the buyer fully understands what is being signed.

The gestor handles administrative paperwork: NIE applications, fiscal residency, payments at the Hacienda. Helpful when the buyer is non-resident and does not speak Spanish.

The topógrafo (surveyor) measures the plot when the boundaries on the Registro do not match what is physically there.

Each does part of the puzzle. The buyer is responsible for assembling the team.

Red Flag 01 · Hidden cargas in the Nota Simple

The Nota Simple is the property’s legal fingerprint at the Registro de la Propiedad. It tells the buyer who legally owns the property, what it is registered as, and what charges, debts or encumbrances are attached to it.

The five most common cargas that appear when the Nota Simple is finally requested:

• An old mortgage from a previous owner that was never officially cancelled, even though it was paid off, because the lending bank never filed the cancelación
• An embargo from an unpaid tax debt to the Agencia Tributaria
• An embargo from unpaid Seguridad Social contributions when the seller was self-employed
• A registered easement of passage, light or water that the seller did not mention
• An ongoing inheritance procedure where the seller is one of several heirs and the others have not consented to the sale

The Nota Simple can be requested online for under ten euros. Any property that the buyer is seriously considering should be checked with a fresh Nota Simple, and checked again in the days before the deposit, because cargas can appear in the interval between the first request and signing.

The check

The non-negotiable rule: if anyone, anyone, asks for money to be transferred before there is a Nota Simple in hand dated within the last seven days, walk away. Moreover, this is the single largest scam pattern in Spanish property fraud, and the Colegio de Registradores flags it as the first warning sign in all their guidance for foreign buyers.

Red Flag 02 · Illegal extensions you inherit (the pool, the porch, the “in family” annex)

This is the Costa Blanca red flag classic, the most common of all. Spain went through a wild construction boom between 1995 and 2009. A significant share of the homes built or modified in that period, particularly in Alicante, Málaga and Almería, were extended, modified or rebuilt without the corresponding licences. A swimming pool added five years after the original build. A terrace that became a closed-in sun room. A guest house “for family use”. A garage transformed into a self-contained studio. None of it on the original licence, none of it on the Catastro, none of it on the Registro.

When the buyer signs, the buyer inherits it all. The sanction. The order to demolish. The fine of up to 6.000 euros for not declaring a construction to the Catastro. The impossibility of regularising the construction because the legalisation window has closed in certain Valencian municipalities. The bank’s appraisal coming back lower than expected because the building includes square metres that legally do not exist.

There is a regularisation route called the AFO (Asimilado Fuera de Ordenación) procedure that allows some illegal constructions to remain in place under specific conditions. Whether the particular extension qualifies depends on the municipality, the zoning, the age of the construction and the original licence file. The Ábaco Advisers guide to AFO and illegal construction is a useful starting point for anyone wanting to understand the mechanics before talking to a professional.

The number that matters: regularising an undeclared construction costs between 2.000 and 30.000 euros when it qualifies. However, it costs much more, sometimes the entire value of the extension, when it does not.

The check

Request the original licencia de obra and the licencia de primera ocupación, then compare against the current catastral certificate and against what is physically built. If the three documents do not agree, there is something to investigate.

Red Flag 03 · When the Catastro and the Registry tell two different stories

There are two parallel systems that track Spanish property and they do not always talk to each other.

The Catastro is managed by the Ministry of Finance. It exists for tax purposes. It assigns a Valor Catastral that determines the IBI, the wealth tax and the imputed income tax for non-residents.

The Registro de la Propiedad is managed by the Ministry of Justice. It defines what the buyer actually owns from a legal point of view. What is written in the Registro is what counts in court.

However, when they disagree, the buyer has a problem. Common disagreements include:

• Different square metres (a house registered at 80 m², built at 130 m², described in the listing as 145 m²)
• Different plot boundaries (the fence inside, or outside, the registered boundary by 30 to 80 cm)
• An annex, pool or terrace present in real life and on the Catastro but missing from the Registro, or the reverse
• Different uses (residential on the Registro, agricultural on the Catastro, or vice versa)

The consequences are not theoretical. The bank values the property based on the registered square metres, which can be far less than the built reality, leaving a financing gap to cover from personal funds. Future extensions require regularising the discrepancy first. Resale is slower and the price is lower because the next buyer’s lawyer will find what the current buyer’s lawyer should have found. In some cases the discrepancy is the symptom of an illegal extension hiding underneath, which takes the buyer back to Red Flag 02.

The fix is called Subsanación catastral o registral, often combined with a topographic survey. It takes between three and twelve months. It is much cheaper to refuse the property than to inherit the discrepancy.

The check

Request both the catastral certificate and the registral certificate for the same property, then compare them line by line. If the buyer cannot read Spanish technical language, this is exactly the moment to bring in a professional.

Red Flag 04 · Setbacks that quietly shrink the buildable area

This is the Costa Blanca red flag that buyers miss most often, because it is invisible from the outside. The plot looks the way it looks. The boundaries appear generous. The agent says “of course you can extend the kitchen towards the garden”, “you could add a guest pavilion at the back”, “this side could become a pool deck”. None of that is true until an architect runs the retranqueos.

Setbacks (retranqueos) are the minimum distances that any construction must respect from the road, from the neighbouring boundary, from a watercourse, from the coast, from a power line, and from the limit of an urbanisation. They are defined in the local Plan General de Ordenación Urbana (PGOU) and the Normas Subsidiarias, which means they vary from municipality to municipality and from one zone to another within the same municipality.

The result, on a typical Costa Blanca plot of 1.000 m², is often that only 350 to 450 m² is legally buildable once setbacks are subtracted. Sometimes much less if the plot sits in an area with stricter zoning, proximity to a watercourse, a protected slope or a coastal reserve under the Ley de Costas.

The dream of “we will extend it later” or “we will build a pool house” can collapse the day the architect draws the first sketch. If the setbacks are not checked before the purchase, the only options are to abandon the project, sell again at a loss, or apply for variances that the municipality is unlikely to grant.

The check

Request the applicable PGOU from the municipal urbanismo office and ask a licensed architect to draw the buildable footprint over a current survey of the plot, with the maximum allowed height, the number of floors and the buildable coefficient. Before the deposit.

Red Flag 05 · The missing Cédula de Habitabilidad

The Cédula de Habitabilidad is the local certificate that says the property is habitable. In the Comunidad Valenciana the equivalent for resale properties is the Licencia de Segunda Ocupación, with similar legal weight. Without it, the buyer cannot legally connect water, electricity or gas. The buyer cannot legally rent the property short-term or long-term. The buyer cannot register it for tourist letting. And the buyer cannot easily sell it again.

Plenty of Costa Blanca properties are missing the Cédula. Some never had it because they were never finished to the standard required. Some had it but it expired and the renewal process surfaced issues that the previous owner did not address. Some had it and it was revoked after a complaint or an inspection.

The Cédula is one of the documents the seller is supposed to provide before completion. In practice it is also one of the documents that “appears at the notary” the day of signing, except, in this case, it appears as a missing item. Which leaves the buyer with a binary choice: walk away, or sign and inherit the problem.

The cost of obtaining or renewing the Cédula varies. A clean renewal costs a few hundred euros and three weeks. A renewal that surfaces illegal constructions, structural defects or boundary issues can cost between 5.000 and 50.000 euros, depending on what needs fixing before the certificate is granted.

The check

Demand the current Cédula de Habitabilidad (or Licencia de Segunda Ocupación) before signing the contract of deposit. In addition, if the document is more than ten years old, request renewal as a condition of the sale.

Two more Costa Blanca red flags buyers cannot ignore in 2026

The five above are the universals. The next two are recent enough that they did not appear on most pre-2024 checklists, and they matter now.

Flood risk after the October 2024 DANA

On 29 October 2024 a Depresión Aislada en Niveles Altos (DANA) dropped, in some Valencian municipalities, more than a year’s worth of rain in a single day. The official death toll across the eastern Spanish floods exceeded two hundred. The damage to property was substantial.

The Costa Blanca was less affected than the Valencia interior because the geography of the area, with elevated ground close to the coast and fewer low-lying albuferas, behaves differently in extreme rain events. However, that does not make the entire Costa Blanca a low-risk zone. National risk re-evaluations published since the DANA indicate that nearly 8 percent of Spanish homes sit in zones now classified as preferential flow zones, where flood waters travel fast enough to cause severe damage to life and property. The Mediterranean coast is over-represented in that figure because dry riverbeds, ravines and barrancos can become deadly torrents in a matter of hours.

The check

Locate the property on the Sistema Nacional de Cartografía de Zonas Inundables (SNCZI), a free public map run by the Ministry for the Ecological Transition. If the property sits in or near a preferential flow zone, insurance pricing and financing terms will reflect that. The same map should be checked for any plot or villa purchase in the region for the foreseeable future.

Tourist licence (VUT) restrictions in the Comunidad Valenciana 2025

For any buyer planning to rent the property short-term, the rules changed in 2025 and they keep changing in 2026. The Generalitat Valenciana introduced significant restrictions on Viviendas de Uso Turístico (VUT).

The headline changes:

• As of April 2025, in any residential building of more than one dwelling, a Junta Extraordinaria of the Comunidad de Propietarios must vote to approve the use of the property as a VUT. Without that approval, no licence.
• In the city of Valencia, new VUT licences are capped at 2 percent of dwellings per neighbourhood, and several zones have a moratorium on new licences until 2026.
• Maximum continuous rental duration is now 10 days.
• Fines for operating without a licence reach 600.000 euros.
• More than 18.000 existing VUT licences were revoked in 2025 alone, mostly for missing identifiers and fiscal irregularities.

The check

Consult the Generalitat Valenciana Turisme registry for the specific municipality and address. In addition, confirm with the local Ayuntamiento before assuming any rental income in the financial plan.

A plot in Calpe is not the same as a plot in Jávea, Moraira or Benitachell.

The honest TL;DR

If you read nothing else, read this. The Costa Blanca red flags below are the universal checklist.

Request a Nota Simple before sending any money. Request another one in the week before completion. Check for illegal extensions by comparing the original building licence against the current Catastro and the actual property. Confirm that the Catastro and the Registro tell the same story. Run the setbacks against the PGOU before falling in love with the floor plan. Verify the Cédula de Habitabilidad is current and clean. Check the flood risk against the 2025 SNCZI maps. Verify the tourist licence rules of the specific municipality if you plan to rent.

It is not a difficult list. However, it is a long list. Moreover, it is the same list serious Spanish buyers have been working through for thirty years. None of these items, on its own, is a deal-breaker. All of them, together, are the reason a Spanish property purchase done properly is one of the safer Mediterranean options.

Frequently asked questions

What is the most common scam when buying property in Spain in 2026?

The most common pattern is “deposit diversion”, where a fraudulent intermediary changes the bank details on a payment instruction at the last minute, redirecting the deposit to an account that is not the seller’s. The second most common is the “legal house, illegal situation” pattern, where the property is genuinely owned by the seller but has undeclared extensions, a missing Cédula, or unresolved cargas that surface after completion. Always pay from your own account to an account whose IBAN is verified by phone with a confirmed contact.

How do you check if a Spanish property has illegal extensions?

Three documents are needed. First, the original licencia de obra and the licencia de primera ocupación, which together describe what was legally built. Second, the current catastral certificate, which describes what is currently declared to the tax authority. Third, an architect inspection of the actual property, which describes physical reality. If the three documents agree, there are no illegal extensions. If any two disagree, there is something to investigate.

Why are the Catastro and the Registro de la Propiedad different in Spain?

They are run by different ministries with different purposes. The Catastro exists for tax. The Registro exists for legal ownership. They were never designed to communicate in real time and historically did not. They are slowly being aligned through the Coordinación Catastro-Registro programme, but discrepancies remain very common, especially in properties built before 2008 and in rural areas.

What is a Cédula de Habitabilidad and is it required?

Yes, in any property intended for living, renting or resale. The Cédula is the local certificate of habitability. In the Comunidad Valenciana the equivalent for resale properties is the Licencia de Segunda Ocupación. Without it, no utilities can be connected legally, no tourist licence can be issued, and the legal status of the property is uncertain. Renewal cycles are typically ten to fifteen years.

Is the Costa Blanca a flood risk area after the 2024 DANA?

The Costa Blanca is less exposed than the Valencian interior where the worst of the 2024 DANA landed, but specific zones, especially properties close to ravines, barrancos and dry riverbeds, do carry meaningful flood risk. The free SNCZI map run by the Ministry for the Ecological Transition is the current authoritative source. Insurance pricing has moved in response to the 2024 event and will likely continue moving in 2026.

Can a foreign owner rent a Spanish property to tourists in 2025?

In some municipalities yes, in others no, in many it depends on the building, the neighbourhood and the date of the application. The 2025 reforms in the Comunidad Valenciana require an explicit vote of the comunidad de propietarios in residential buildings with more than one dwelling. New licences are capped in central Valencia. Fines for operating without a licence can reach 600.000 euros. Check the rules of the specific municipality before counting on rental income.

Is a Spanish lawyer required to buy property in Spain?

Strictly, no. Practically, yes. The seller’s lawyer is not the buyer’s lawyer. The estate agent is not the buyer’s lawyer. The notary is impartial. An independent Spanish property lawyer is the minimum civilised infrastructure for a Spanish property purchase.

Does the Costa Blanca have many English-speaking professionals?

Yes. The Costa Blanca has one of the oldest established international communities in Spain, going back to the 1960s. English-speaking lawyers, architects, surveyors, notaries, doctors and gestores are abundant in Jávea, Moraira, Benitachell, Altea, Calpe, El Campello and the surrounding municipalities. Quality varies. Recommendations from previous clients tend to be more reliable than recommendations from sellers.

If you would rather not run this checklist alone on a wet Sunday afternoon, the Quiz at raquelfenoll.com/quiz maps which Costa Blanca red flags your specific project needs to clear first, in which order, and at what cost. Three minutes, no calendar, no call. The Quiz is free.

Same horizon. Less drama.

This article is for general information. It does not constitute legal advice. Article last updated 28 May 2026.