Buying an Investment Property in Castellón as a Foreign Investor

For a UK-based buyer, investing in Castellón means dealing with a different legal system, a different currency and a tax return back home as well as one in Spain. None of that is complicated once you know the steps, but it does need to be planned before you make an offer, not after.

This guide sets out the property types that tend to work for renovation or renting in Castellón, the local rules on tourist rentals, the costs you should budget for on top of the price, and how the whole process can be handled from the UK, with the property always registered in your own name.

Castellón province lies along the northern Costa del Azahar, offering a coastline with towns such as Peñíscola alongside inland mountainous areas. It tends to appeal to buyers seeking a quieter, less developed coastal environment compared to areas further south, including those interested in traditional Spanish towns and countryside.

The region is generally accessed via Valencia or Castellón airports, with more limited direct international flight options than larger hubs. Property types include coastal apartments, traditional village houses, and rural fincas, with activity increasing during the summer tourist season.

Castellón province gives a foreign investor three quite different starting points. Along the Costa del Azahar, apartments near Peñíscola and the smaller coastal towns attract holidaymakers who want a quieter alternative to the busier costas further south, and they tend to need light refreshing rather than a full renovation before they can be rented out. Move a few kilometres inland and the picture changes: traditional village houses in the historic centres often come with original stone walls, old floor plans and real renovation scope, and they are usually bought either to live in or to resell to buyers drawn to a slower, more authentic version of Spain. Rural fincas go further still, with land, outbuildings, water access and sometimes shared tracks that all need checking before any renovation budget can be set.

For a managed investment, this range matters: a coastal apartment and an inland finca are not comparable projects, and the renovation plan, the timeline and the eventual buyer or tenant profile differ for each. Our own renovation team has worked on both coastal and inland properties across our projects since 2022, with a median renovation budget of 22% of the purchase price across those 18 completed homes — a past result for the group as a whole, not a figure tied to any one property type and never a promise for a future project.

Demand on the Castellón coast rises sharply in summer, when short lets and viewings both pick up, and quietens noticeably outside the season. Inland, village houses and fincas follow a steadier rhythm: interest comes from buyers looking for a second home, a renovation project or a longer-term rental to local tenants rather than from the tourist calendar, so timing a purchase there depends less on the season and more on when the right property comes up.

Castellón is generally reached through Valencia airport or the smaller Castellón airport, both with fewer direct international routes than the larger Spanish hubs. For a buyer based abroad this makes video viewings genuinely useful for a first look, with an in-person visit kept for the shortlist, and it is worth planning any notary signing or renovation site visit around realistic flight connections rather than assuming a same-day trip.

Castellón belongs to the Comunitat Valenciana, and it is this regional government, not the province, that sets the transfer tax (ITP) applied to resale purchases — the table on this page gives the current rate, and it applies equally whether the property is a coastal apartment, a village house or a finca. A new-build coastal apartment instead carries VAT plus stamp duty rather than ITP. The same regional government also sets the licensing rules for tourist rentals, and individual town councils, including Peñíscola, can add their own building-level conditions, so the specific address matters as much as the general regional rule.

Whatever is bought and however it is used, the usual Spanish mechanics apply on exit: a municipal capital-gains tax (plusvalía) on the land value is due when the property is sold, and if the seller is a non-resident the buyer withholds 3% of the price on account of that seller's Spanish tax.

The mechanics are the same across the province: a Spanish tax number (NIE) and usually a Spanish bank account, a deed signed before a notary local to Castellón, and registration in the Land Registry. For a village house or a finca, a lawyer is particularly useful to check boundaries, water rights and any discrepancy between the land registry entry and what stands on the ground — common enough in older inland properties that it is worth budgeting the time for. A gestoría handles the administrative filings either way.

Under our managed investment service, you buy the property in your own name, our own renovation team carries out the works on a coastal apartment, a village house or a finca as agreed, and we then sell it or rent it out on your behalf; fees are agreed in advance and returns are never guaranteed. If financing is part of the plan, our partner Colibrí Finances arranges mortgages for non-residents, without us quoting any particular proportion of the price in advance. Once you own the property, non-resident tax returns (Modelo 210), IBI and community fees apply as they would anywhere else in Spain.

Before committing capital to Castellón (province), it helps to see the fundamentals: population, asking prices, transport links and climate, each dated and sourced. Together they offer a grounded, realistic view of Castellón (province) for an investor assessing the market from outside Spain.

Castellón province, taken as a whole rather than just its capital, counted 627,620 registered residents on 1 January 2025 in the INE census. The number reflects the full territory, large and small municipalities alike, that makes up the province. Across the province of Castellón, 118,810 residents carry a foreign nationality, near 19 of every 100. This is a solid but moderate presence, one that differs a great deal from town to town across the province.

According to INE, only 1,423 British nationals were registered across the province of Castellón as of 1 January 2025. That low figure reflects the padrón's focus on year-round residents, excluding owners who use a property there only part-time. Here are the largest foreign communities registered in Castellón (province) on 1 January 2025, drawn from the nationality figures INE publishes for each municipality.

This second table covers nationalities the census does not itemise separately, such as Germans, Italians, Dutch, Belgians or Scandinavians, across Castellón province. The data come from 1 January 2022, the latest INE edition with full nationality detail, a year different from the table above.

Of the 3,955 homes for sale across the province of Castellón, the median works out at €1,740/m², with a median ticket of €179,000 in our data. That is below the €3,135/m² median across the 130 towns we track, making the province one of the more affordable among them. Among current adverts, the central half cluster between €1,230 and €2,370 per square metre; some properties are listed well below this band, others well above it.

On the median asking price of €179,000 in Castellón (province), transfer tax on a resale home at the regional rate of 9 % works out at about €16,100, and notary, land registry and gestoría fees add roughly €2,100 more. That brings the extra cost to about €18,300, money a buyer needs in savings since a mortgage does not cover it. These are asking prices taken from adverts active on 2026-11-01, not confirmed sale prices. What a buyer actually pays is negotiated, and depends on the condition, exact location and orientation of each home.

Below is a comparison of the towns we follow in Castellón, covering inhabitants, foreign residents per 100 inhabitants and median asking prices per square metre across the province.

Castellón (province) showed 6,990 estimated holiday-let dwellings in 05/2026, per INE's experimental platform-based statistic, totalling 37,362 bed places and about 11 per 1,000 residents. This points to a moderate holiday-let presence, with a regional licence still required for tourist letting. The Ministry of Housing's reference system records a median 2024 rent of €440 a month for long-term flats in Castellón (province), based on 29,530 tax-declared contracts. It is a backward-looking official figure, not a projection, and says nothing about holiday-let earnings; rents can go down as well as up. Monthly rents for flats, drawn from the same official figures, cluster between €350 and €550 for the middle half of tenancies.

Castellón has a single commercial airport, Aeropuerto de Castellón (CDT); depending on where exactly in the province your property is located, an airport in a neighbouring province may actually sit closer to your door. Because Castellón de la Plana is where these climate figures were measured, other parts of the province, further inland, at higher altitude or on separate islands, can feel quite different. With January averaging 10.6 °C and overnight lows around 5.8 °C, against an August mean of 25.6 °C and highs near 30.3 °C, winters are mild rather than warm. Checking the heating in any home is a sensible step. With about 467 mm of rain a year on roughly 46 days, rain is neither scarce nor abundant here. Sunshine totals around 2,755 hours a year. These figures are the official climate normals (1981-2010) from AEMET, Spain's state weather agency, at its Castelló - Almassora station, about 4 km away; conditions at the exact property can differ slightly, especially inland or at altitude.

The province of Castellón saw 14,098 registered home sales in the year to 07/2026, per INE. A busier market like this generally offers more comparable transactions and greater choice. Bear in mind that these numbers reflect the province of Castellón overall; they shift a great deal between towns and between individual properties. Let us know what you have in mind so we can look at your case.

The transfer tax on a resale home is set by each Spanish region. In Castellón the general rate is 9 %, and on top of it come notary, land registry and gestoría (roughly one more percent). On a new build you pay 10 % VAT plus stamp duty instead of the transfer tax. This money is not lent by the bank.

In most of Castellón, the properties best suited to a renovation project are older village houses, town apartments that have not been updated for a couple of decades, and small blocks split into a few flats. These tend to come with room to add value through a refurbishment, and they are the type of property our own renovation team is used to working on.

If you would rather buy something ready to rent from day one, look at apartments in established residential areas with straightforward layouts and low community charges. Whichever route you choose, always check the property's legal status, any debts owed to the community of owners, and whether the building has open planning issues before making an offer.

If your plan for Castellón includes short-term or holiday letting, do not assume it will be allowed. Tourist rentals need a regional licence, and many regions and individual buildings restrict or ban them outright, sometimes through a decision taken by the community of owners after you have already bought. Confirm the licence position for the specific address before you commit, not after signing.

Long-term renting is subject to fewer restrictions but still needs a proper contract and correct tax reporting, covered further down.

Whatever you buy in Castellón, budget for costs beyond the purchase price itself. Resale homes carry a regional transfer tax (ITP); new-build homes carry VAT plus stamp duty instead. On top of that come notary and land registry fees, a gestoría to handle the paperwork, and usually a lawyer, which is optional but standard practice for buyers coming from abroad.

You do not need to live in Spain, or even visit repeatedly, to buy in Castellón. You will need a Spanish tax number (NIE) and, in most cases, a Spanish bank account; viewings can be done in person or by video, and a lawyer or a trusted representative with power of attorney can sign in front of the notary on your behalf if you cannot travel for completion. The deed is then registered in the Land Registry, which usually takes some weeks.

If financing is part of your plan, Spanish mortgages for non-residents exist and our partner Colibrí Finances arranges them, though approval and terms depend on your own circumstances and no lender can promise a loan in advance. Because you will be paying and transferring funds in euros while earning in sterling, build exchange-rate movements and conversion costs into your budget from the start.

As a non-resident owner you will file an annual Spanish tax return (Modelo 210), whether or not the property is rented, and you will owe municipal property tax (IBI) and community fees every year. Spain and the United Kingdom have a double taxation agreement, so you should not be taxed twice on the same income, but a tax adviser needs to confirm exactly how rental income or any gain is reported to HMRC alongside your Spanish filings.

Note that the Spanish "Golden Visa" for property investors ended on 3 April 2025 and is no longer an option; it is not part of any plan you should make around a Spanish purchase now.

Spain is a relatively short flight away from most UK airports, making regular visits to a Spanish property straightforward for owners based in Britain. Many British buyers are drawn to Spain for its climate, coastal lifestyle and established expatriate communities. One practical point to bear in mind is that Spanish inheritance law differs from UK rules, so it is worth taking specific advice on how it may affect the property and one's estate. Currency movements between sterling and the euro can also affect the overall cost of purchase and ongoing expenses.

Spain and the United Kingdom have a double taxation agreement in place, and a local tax adviser should confirm how rental income or gains from Spanish property must be declared and reported to HMRC.

As the United Kingdom is no longer an EU member state, British citizens may stay in Spain for up to 90 days in any 180-day period without a visa, and must apply for a visa or residence permit for longer stays.

Since the United Kingdom uses the pound sterling (GBP) rather than the euro, buyers should factor in exchange-rate movements and currency conversion costs when paying for a property or transferring funds to Spain.