How much you earn renting your Madrid flat by the room (vs. a traditional let)

If you own a flat in Madrid, the first decision that changes your yield isn't the neighborhood or the renovation — it's how you rent it out. The same three-bedroom flat can bring in €1,200 a month on a traditional lease or over €1,900 rented room by room. Year after year, that gap is huge.

Here's the breakdown, with real numbers and no fluff.

The traditional lease: convenient but capped

You rent the whole flat to one person or family on a single contract. Upside: a single point of contact, less management and, on paper, stability. The problem is the income ceiling: you earn what the market pays for "the flat", not for each room.

In areas like Tetuán, Carabanchel or Vallecas, a 3-bedroom flat currently rents in the €1,100–1,400/month range. And when the tenant leaves, the whole flat sits empty until the next one moves in.

Room-by-room: more income, more management

Here each room is its own contract. In Madrid a furnished single room with bills included typically rents between €450 and €650 depending on area and size. That same 3-bedroom flat can generate €1,500–1,950/month.

Risk is also spread out: if one person leaves, you keep collecting from the other two. The flat is almost never fully empty.

The numbers (3-bedroom flat, mid-range area)

• Traditional: €1,250/month → €15,000/year gross.
• By the room: 3 × €575 = €1,725/month → €20,700/year gross.
• Difference: +€5,700/year, about 38% more gross income.

But watch out: rooms come with more costs

Let's be honest. Room renting earns more because it also means more work and more cost:

• Bills included (electricity, water, gas, internet): €150–250/month.
• Furnishing and maintaining common areas.
• Higher turnover: move-ins and move-outs, cleanings, check-ins.
• Almost daily management.

Even after deducting all of that, the net yield is usually still clearly higher. The key is not letting management eat your margin or your time.

What if I don't want to manage anything?

That's the question most owners ask. Good news: you can keep the room-renting yield without lifting a finger. With professional management (or a guaranteed-rent model), a specialised company handles tenants, contracts, bills, cleaning and incidents, and you receive rent every month.

At AdastraHouse that's exactly what we do: we optimise the flat, rent it by the room, and you get paid without worrying about management. If you want to know what your specific flat would earn, we can give you a realistic figure.

Bottom line

Room renting isn't for every flat or every owner, but when it fits, the income difference is hard to ignore. The most expensive mistake is assuming "renting is renting": it isn't. Before signing a traditional contract, work out what the flat would earn by the room. You might be leaving thousands of euros a year on the table.