What a holiday rental website in Spain actually needs

Start with what the law requires you to be able to show

In December 2024 Spain created a Single Rental Registry and a Digital Single Window for short-term rentals, through Royal Decree 1312/2024 of 23 December, published in the Official State Gazette on 24 December 2024. It came into force on 2 January 2025 and its provisions took effect on 1 July 2025.

That state-wide single registry no longer exists. The Supreme Court annulled it in 2026 in three rulings of its Third Chamber: the one of 19 May, resolving the challenge by the Generalitat Valenciana; the one of 21 May, resolving the challenge by the tourist apartment associations of Barcelona and Girona; and the one of 1 June, resolving the challenge by the Region of Murcia. All three agree on the essential point: the State had no competence to build a national registry that overlaps the registries the autonomous communities already keep.

It is worth separating what was annulled from what still stands, because they are not the same. What falls are the provisions of the royal decree that regulated the procedure of the state-wide single registry and its number, among them articles 5, 8, 9 and 10 and parts of articles 1, 2, 6 and 12. What stands are the tourism registries of each autonomous community, which are the ones that actually give you your number, and the Digital Single Window with the obligation on platforms to transmit data. The Supreme Court itself clarified in a later order that article 6 is not annulled in full, only in what referred to the single registry procedure and its number.

And now the practical part, which barely changes. Your number is still the one from the tourism registry of your autonomous community, and each one goes its own way: check with yours before assuming anything. The sensible thing is still for your website to be able to display it, because if one day you are required to, you do not want to depend on someone touching your code.

This section was reviewed on 31 July 2026 against the consolidated text of the Official State Gazette, which already records the three annulments. This is ground that has moved three times in a year, so if you are reading this much later, go and check it again.

What a traveller looks for in thirty seconds

When someone lands on a rental website they are not there to read. They are there to check four things and decide whether to carry on or go back to the portal.

• Photos that look like reality and that load fast.
• The price for their dates, not a from rate that turns out not to exist.
• Whether it is free, and by that we mean actually free, not an enquiry answered tomorrow.
• How to book and who is on the other end if something goes wrong.

If your website does not answer those four on the first screen, the rest of the website makes no difference. That is the yardstick you should use on any quote you are given.

What sits underneath and never shows

There are three things that do not shine in a demo and that are the ones that keep you out of trouble.

• A calendar synced with the portals you are already on. Without it you will sell the same night twice, and it is not a question of whether but when.
• Your own legal texts, kept up to date: terms, privacy and whatever information your region requires.
• Languages and the tags that tell Google which version to show each visitor. If your market is international, this is not an extra.

What you do not need

And now the part that is usually missing from these guides. For one holiday apartment, or for three, some things are sold as essential and are not.

• A corporate blog you are never going to write. Better none at all than one with two posts from three years ago.
• A live chat if nobody is on the other side at reasonable hours. A visible phone number works better.
• Animations and effects that slow the page down. Speed converts, the effect does not.
• An annual redesign. A rental website ages well as long as the photos and the prices are current.

The three routes, and what each one costs to keep

Building it yourself with a site builder is cheap to start and expensive to keep, because the real cost is not the design but keeping the calendar and the prices in sync all year. Commissioning an agency gives you a bespoke website and ties you to them for every change. The third route is a service that generates it from your listing and takes care of the upkeep, which is what we do and therefore something we are not going to pretend to be neutral about.

We are not putting third-party prices here because we have not checked them one by one, and publishing a table of other people prices without verifying them would be exactly the opposite of what we ask of everyone else. Ours are on the pricing page.

How to tell whether yours is working

With two questions a month. How many people reached the website and how many ended up writing or booking? And of those who booked, how many came from a portal to check whether you had your own website? If the second figure is growing, you are on track, even if the total takes a while to move.

Paste your listing link and see how yours turns out