idealista, Fotocasa and Badi compared for renting and buying in Spain — instant alerts, exclusive listings, neighbourhood price data and rooms in shared flats.
A good flat in a Spanish city can be gone within hours of the listing appearing, so flat hunting works like a speed sport: whoever has precise alerts and paperwork ready wins. Searching a single portal also means missing options, because every site carries some exclusive stock and agencies cross-post inconsistently. The 3 apps in this guide are the two general portals that actually move the market, run in parallel, plus the room-and-houseshare specialist that generalist sites never serve well.
idealista is the benchmark portal: Spain's largest pool of listings and the instant alerts that decide hot markets.
idealista is the leading property portal in Spain, with the biggest stock of homes for sale and rent. Its strongest practical feature is instant alerts, because in a tight market a good flat disappears within hours; you can also draw your exact search area on the map and compare neighbourhood price data to spot overpricing. On the downside, everything moves fast in desirable areas, private sellers are scarce, and some agencies simply never reply to enquiries.
Fotocasa carries listings idealista does not, so running both searches is what actually widens your options.
Fotocasa is Spain's second large property portal and the natural companion to idealista rather than a replacement, because part of its stock is exclusive to the site. Searching only one of them genuinely means missing flats. Alongside its own pool it provides a price index, instant alerts and fine-grained filters such as terrace, lift or pets. It is smaller in volume than idealista, listings are duplicated across portals, and its results mix in ads for new developments.
Badi is the room specialist: flatmate profiles with lifestyle detail and direct chat, above all in Madrid and Barcelona.
Badi is the Spanish app built specifically for rooms and house shares, which is the gap idealista never quite fills. Profiles include interests and lifestyle habits, you chat directly with no middleman, and users are verified, all of which matters when you are choosing who you live with rather than just a property. In expensive cities like Madrid and Barcelona, where sharing is the default, it is the right tool; outside the big cities its usefulness drops, visibility features cost money, and whole flats are rare.
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Questions & answers
How do I get a flat before it disappears?
The instant alert is the main tool: set it on idealista and Fotocasa with your exact criteria and reply within minutes, not hours, with a short, complete message saying who you are, your income and when you can visit. Keep payslips, an employment contract and references ready as PDFs on your phone. In tight markets the first person with paperwork in order usually gets the viewing, and often the flat.
Where do I look for a whole flat, and where for a room?
For a whole flat, run idealista and Fotocasa together because their listings do not fully overlap, and keep an eye on Milanuncios for private owners. For a room, Badi is built for exactly that: you can see future flatmates' age, habits and schedules before writing, which generalist portals never tell you. In the most expensive cities, sharing through Badi is often the only realistic way to move out.
How do I avoid scams while flat hunting?
The warning signs are consistent: a price well below market, an owner supposedly abroad asking for money before any viewing, and manufactured urgency. Never pay a deposit, bond or reservation fee without visiting the flat and confirming the person is the owner or their representative, be cautious about moving conversation off the platform, and use the in-app chat so there is a trail. Portals do remove fraudulent listings, but they are always catching up.
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