Sant Boi de Llobregat · Barcelona
Rental yield in Sant Boi de Llobregat
Sant Boi de Llobregat is an affordable area for Barcelona, with a high rental yield and a Total Return below the city average. Here is what a typical flat in Sant Boi de Llobregat costs to buy and rent, and the Total Return (IRR) it delivers, compared with the other areas of Sant Boi de Llobregat.
Sale price
2,327
€/m² · second-hand homes
Rent
10.8
€/m² per month · SERPAVI legal cap
Gross yield
5.6%
annual rent ÷ price
Total Return
3.7%
10-year IRR · typical flat
Appreciation
+1.4%
a year, 10-15 year history
Cash flow
-€63
per month, year 1, after tax
What the data says
Sant Boi de Llobregat is an area of Sant Boi de Llobregat, in the Barcelona metropolitan area. The reference sale price is €2,327/m², based on the Fotocasa index adjusted to transaction prices: 44% below the Barcelona median (€4,141/m²). It ranks 75 of 86 areas in the Barcelona region by price.
The reference rent is €10.8/m² per month (SERPAVI median for the neighbourhood, 2024): about €724 a month for a typical 67 m² flat. Sant Boi de Llobregat is a declared stressed rental zone, so that figure acts as the legal cap on a new tenancy. The gross yield (annual rent ÷ price) comes to 5.6%, 1.5 points above the city median (4.1%): rank 7 of 86 by gross yield.
With a 70% mortgage at 3.80% over 25 years and a sale after 10 years, the estimated Total Return (IRR) for that typical flat is 3.7%, below the Barcelona median (4.1%). It takes about €64,398 of cash (deposit, taxes and costs), and first-year cash flow after tax is -€63 a month.
Asking prices in Sant Boi de Llobregat have grown by an average of 1.4% a year over the last 10 and 15 years (idealista, December 2025). Historical, not a forecast: it is the appreciation the modelled sale assumes.
A typical flat in Sant Boi de Llobregat
The same standard assumptions as the CasaROI map: change the mortgage, term or tax profile in your account and the Total Return is recalculated for your case.
- Size
- 67 m²
- Purchase price
- €155,909
- Monthly rent
- €724
- Cash needed · deposit + transfer tax + costs
- €64,398
- Monthly cash flow (year 1)
- -€63
- Total Return (IRR)
- 3.7%
Assumptions: 70% mortgage over 25 years at 3.80%, sale after 10 years, Spanish tax resident at a 37% marginal rate, no renovation.
Nearest areas, ranked by gross yield
| Area | €/m² | Rent €/m² | Gross | IRR |
|---|---|---|---|---|
| L'Hospitalet de Llobregat | 2,666 | 13.0 | 5.9% | 5.5% |
| Sant Boi de Llobregat | 2,327 | 10.8 | 5.6% | 3.7% |
| la Marina del Prat Vermell - Zona Franca | 3,465 | 15.0 | 5.2% | 6.4% |
| Cornellà de Llobregat | 2,706 | 11.1 | 4.9% | 3.6% |
| El Prat de Llobregat | 2,820 | 10.8 | 4.6% | 3.6% |
| Sants - Badal | 4,320 | 14.9 | 4.1% | 4.8% |
| Castelldefels | 3,904 | 12.6 | 3.9% | 3.7% |
| la Maternitat i Sant Ramon | 5,009 | 15.3 | 3.7% | 4.1% |
| la Marina de Port | 4,356 | 12.8 | 3.5% | 3.7% |
Frequently asked questions
How much does a square metre cost in Sant Boi de Llobregat?
€2,327/m² on average, based on the Fotocasa index adjusted to transaction prices. A typical 67 m² flat costs about €155,909, 44% below the Barcelona median.
How much is rent in Sant Boi de Llobregat?
The reference rent is €10.8/m² per month: about €724 a month for 67 m². As a stressed rental zone, that figure is the legal cap on a new whole-flat tenancy (room-by-room lets are exempt).
Is Sant Boi de Llobregat a good buy-to-let investment?
The gross yield is 5.6% (Barcelona median: 4.1%). With a 70% mortgage and a sale after 10 years, the estimated Total Return (IRR) is 3.7% against a city median of 4.1%. It depends on your financing and tax residency: with your own profile the number can change.
Is Sant Boi de Llobregat in a stressed rental zone?
Yes. Sant Boi de Llobregat is a declared stressed rental zone, so on a new whole-flat tenancy the rent is limited by the official reference index (SERPAVI).
Buying in Sant Boi de Llobregat?
Paste the listing and we tell you whether it holds up at that price: legal rent, taxes, red flags and a verdict.
Sources and method
- Sale: idealista · municipal sale-price report (June 2026) · ÷1,13 a precio de transacción (calibrado vs registral Madrid/BCN)
- Rent: SERPAVI · declared rent for the municipality (Housing Ministry/AEAT 2024) · stressed rental zone
- Appreciation: average of the 10- and 15-year rates of the area's asking price — historical, not a forecast