Hi everyone, I’ve been apartment hunting in Madrid recently and stumbled upon something very confusing: the way floors are named. It’s completely different from the system in the US or what you might be used to, and I almost made an embarrassing mistake. So today, I’m breaking it all down to help other newcomers avoid the same pitfalls.
How Are Floors Actually Numbered in Spain?
In Spain, the concept of a ‘first’ or ‘second’ floor follows a logic that’s entirely different. The very bottom level, the one at street level, is called the Planta Baja, often abbreviated as PB. This is the true ‘ground floor’. In some older buildings, you might find a mezzanine level between the PB and the next floor, called an Entresuelo, which is a key detail when choosing a floor in Spain.
Now for the main twist: the floor above the PB is typically not called the ‘first floor.’ Instead, it’s the Planta Principal, which translates to the ‘main floor’. Historically, this was the most prestigious level where the building’s owner lived, boasting the highest ceilings and largest windows. Above that, the floors are numbered sequentially: Primero (First), Segundo (Second), and so on. This means that Spain’s Primero is actually what most of us would consider the third floor!

Comparison with the US/International System
To make it clearer, here’s a simple comparison table. Note that in some buildings, the ‘Principal’ and ‘Primero’ floors may be combined, but the general logic holds.
| Spanish Term | US / International Equivalent |
| Planta Baja | Ground Floor / 1st Floor |
| Entresuelo / Principal | 2nd Floor |
| Primero | 3rd Floor |
| Segundo | 4th Floor |
| Ático | Top Floor / Penthouse |
A Bit of History
So why the unusual naming convention? It’s rooted in history. The wealthy and noble preferred to live on the Principal floor as a status symbol that also saved them from climbing too many stairs in an era before elevators. Meanwhile, the top-floor Ático, once used as servants’ quarters or storage, is now prime real estate. It often features a large terrace, unbeatable views, and commands the highest price. So, never assume the Principal is the first floor; the system is more nuanced, especially when evaluating the pros and cons of low-rise floors in Spain.
When viewing or renting a property in Spain, always double-check when a floor is mentioned. Be sure to clarify if it’s the Planta Baja, Principal, or Primero. This is especially crucial when browsing listings on portals like Idealista or Fotocasa—pay close attention to the floor details provided. Hope this quick guide helps you navigate your property search!