For those of you currently house-hunting, have you noticed that every property listing includes something that looks like an appliance energy label, with ratings from A to G? I didn’t pay much attention to it at first, thinking it was just a reference for energy consumption. It wasn’t until I was discussing my mortgage with a bank manager the other day that I discovered this little ‘Energy Performance Certificate’ is directly linked to my interest rate!
This certificate is a mandatory requirement in Spain; landlords must provide it for both sales and rentals. It assesses a property’s energy consumption and carbon dioxide emissions related to insulation, ventilation, lighting, hot water, and so on. Simply put, A is the most energy-efficient, and G is the least. Most older properties in Spain, especially in city centers, have low ratings—getting a D or E is often considered pretty good.

How Do Energy Ratings Affect Bank Loans?
Here’s the key point! In response to the EU’s environmental policies, major Spanish banks are now actively promoting a product called a ‘green mortgage’ (hipoteca verde). If the property you’re buying has an energy rating of A or B, the bank will offer you a preferential interest rate. This discount could range from 0.1% to 0.25% off the standard fixed or variable rate. It might not sound like much, but over a 20 or 30-year mortgage term, it adds up to a significant amount!
I’ve made a simple table to make it clearer:
| Mortgage Type | Property Energy Rating | Reference Rate | Notes |
| Standard Mortgage | C, D, E… | 3.00% | Standard rate |
| Green Mortgage | A, B | 2.85% | 0.15% rate discount applies |
Note: The rates above are for illustrative purposes only. Please consult individual banks for specific figures.
What If the House You Like Has a Low Rating on its Energy Certificate?
Don’t panic—after all, high-rated properties are often rare and more expensive. If you’ve found a house that’s perfect in every other way but has an F or G energy rating, it’s not the end of the world. First, you can use this as a bargaining chip to negotiate the price with the seller. Second, some banks offer loans specifically for energy-efficient home renovations, such as installing double-glazed windows or adding exterior wall insulation. You could talk to your bank about whether the cost of these renovations can be bundled with your main mortgage. This not only improves your living comfort and saves on future utility bills but might also make you eligible for the bank’s interest rate discount after the upgrades.
So, next time you’re viewing a property, in addition to checking the price, location, and layout, take a closer look at that Energy Performance Certificate. And when you apply for a mortgage, be sure to ask: ‘My property has a good energy rating; are there any interest rate discounts available?’ This simple question could potentially save you thousands, or even tens of thousands, of euros. Have any of you had a similar experience? Feel free to share and discuss in the comments below! Wishing everyone the best in finding their dream home!