Castellón: budgeting for the Balearic sustainable tourism tax

Many people living in the United Kingdom who arrange a Spanish mortgage for a property Castellón first come across the sustainable tourism tax only once they consider letting the home to visitors. It is a regional charge, separate from the taxes and fees involved in buying.

Understanding when it applies, and how it differs from the one-off costs settled at completion, helps build a realistic budget both for the purchase itself and for owning the property afterwards.

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.

What follows are measured, dated figures for Castellón (province) — who lives there, what homes are advertised for, how to get there and the climate — each one sourced. They help you build a realistic picture of Castellón (province) as you work out the budget for a Spanish mortgage.

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. The following table shows the leading foreign nationalities registered in Castellón (province) on 1 January 2025, according to the municipal-level data INE makes available.

A further table sets out nationalities not broken down above, among them Germans, Italians, Dutch, Belgians and Scandinavians, registered throughout Castellón province. Unlike that earlier table, this one uses data from 1 January 2022, the latest edition with full nationality detail.

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. Prices vary considerably from one listing to the next, though the bulk of the market, its middle half, falls between €1,230 and €2,370 per square metre.

In Castellón (province), the regional transfer tax rate of 9 % applied to the median asking price of €179,000 gives a tax bill of about €16,100, plus roughly €2,100 for notary, registry and gestoría charges. That puts the total near €18,300, money the mortgage will not cover. The figures reflect asking prices in listings live on 2026-11-01, rather than prices actually paid. Final amounts are agreed through negotiation and vary with the state, location and orientation of each property.

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.

In 05/2026, Castellón (province) had an estimated 6,990 tourist homes according to INE's experimental platform-based statistic, equivalent to 37,362 bed places and roughly 11 per 1,000 residents. The level is moderate, though letting a home to tourists still needs a regional licence.

The only commercial airport within the province of Castellón is Aeropuerto de Castellón (CDT), so it is worth checking in advance whether it operates in the season you plan to travel, since schedules can vary through the year. 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. January averages 10.6 °C, with a typical overnight minimum of 5.8 °C, while August reaches a mean of 25.6 °C and a daily maximum around 30.3 °C. Winter here is cool rather than cold, so heating matters and is worth checking in any home. Annual rainfall sits around 467 mm, falling on roughly 46 days, neither particularly dry nor wet. The area records about 2,755 hours of sunshine a year. Source: the 1981-2010 climate normals published by AEMET, the state weather agency, for its Castelló - Almassora station, some 4 km from here; local conditions can differ, especially inland or at altitude.

In the twelve months to 07/2026, 14,098 homes changed hands in the province of Castellón, INE figures show. Such activity tends to bring more reference prices and a larger selection for anyone searching. The figures above cover the whole province of Castellón, but they vary widely from town to town and from property to property. Share what you are searching for and we can review the details with you.

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.

The Balearic sustainable tourism tax, locally the Impost sobre Estades Turístiques, is charged for each night spent in tourist accommodation across the islands. It is paid by the guest and normally collected by whoever manages the stay, with the proceeds earmarked for environmental and infrastructure projects on the islands.

For a buyer arranging a Spanish mortgage to purchase a home Castellón, this tax does not appear in the notary's completion figures or in the bank's valuation report. It only becomes relevant once the property is used for paid tourist stays, so it belongs in a separate, ongoing budget rather than in the one-off costs of buying.

Buying a home with a mortgage in Castellón already involves several fixed costs beyond the price: transfer tax on a resale property, or VAT at 10% plus stamp duty on a new build, together with notary fees, land registry fees, a gestoría to handle paperwork, and the bank's own valuation of the property. These are settled once, around completion.

The sustainable tourism tax works on a different timeline. If there is ever a plan to let the property to visitors, it becomes a recurring cost that depends on occupancy, sitting alongside, not instead of, the annual tax return every non-resident owner in Spain must file.

Spanish banks assessing a mortgage application from someone living in the United Kingdom typically ask for recent P60s and payslips, the last filed Self Assessment tax return, three to six months of bank statements, details of any existing loans or mortgage commitments, and a valid passport. Each document is usually required in a sworn Spanish translation, and the exact list varies by bank.

Because the United Kingdom uses the pound rather than the euro, it is worth tracking exchange-rate movements and conversion costs separately from the property budget: a stable euro figure for purchase costs can still represent a moving sterling amount depending on when transfers are made.

Owning a home as a non-resident brings its own annual paperwork: every non-resident owner in Spain files a yearly tax return on the property, regardless of whether it is let. If letting income is involved, the sustainable tourism tax collected from guests is reported and paid separately, through the regional tax authority, not through that annual return.

If the property is ever sold, the buyer withholds 3% of the price on account of the seller's Spanish tax, a rule that applies to every non-resident seller and is unrelated to the tourism tax or to the mortgage that financed the purchase. A tax adviser familiar with both Spanish and UK rules, and with the double taxation agreement between the two countries, can keep these obligations straight.

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.