Lifestyle · 7 min read
Sustainable luxury: energy-efficient, eco-friendly homes on the Costa Blanca
20 August 2026 · Hansson & Hertzell
Solar panels, aerothermal systems, energy certificates and the right orientation — how to find a comfortable, low-consumption home on the Costa Blanca without sacrificing style, and what to check in a resale property.
# Sustainable luxury on the Costa Blanca: choosing an energy-efficient home
The Costa Blanca's 320 days of sunshine a year are not just a lifestyle perk — they are one of Europe's best foundations for energy-efficient living. A well-designed home here can hold comfortable indoor temperatures for most of the year with very little energy. This guide covers what actually makes a Costa Blanca property efficient, and what to check when you view a resale home.
The energy certificate — start here
Every property sold in Spain must carry an energy certificate (certificado energético) rated A to G, just like a household appliance, and it must appear in the listing. Most older coastal homes sit at E, F or G — not because they are poor homes, but because they were built for a mild climate with little thought for insulation.
The certificate isn't the whole story, but it's a good starting point. Always ask to see it, and ask what sits behind the rating: orientation, glazing, insulation and heating.
The factors that matter most
Orientation. South and south-east aspects bring winter sun into the home and keep rooms comfortable without heating. A pure west aspect often overheats in the afternoon. Orientation can't be retrofitted, so it's one of the most important things to judge in person.
Windows and glazing. Double glazing (doble acristalamiento) with thermally broken frames is standard in modern homes but missing from many older ones. It affects heat, cooling and noise alike.
Aerothermal systems (aerotermia). Heat-pump technology that handles heating, cooling and hot water in one system is now common in newer homes and is the single biggest upgrade many owners make. It replaces both an electric boiler and separate AC units.
Solar panels (placas solares). With Spain's sunshine hours, a solar array often pays back quickly, and since 2019 self-consumption is fully permitted with the option to sell surplus back to the grid. Check whether the home already has a system and whether it's properly registered.
Pool heating and water. A pool heat pump extends the swimming season considerably. Water-saving fittings and drip irrigation lower running costs in a climate where water is a resource worth managing.
What does it cost to make a resale home more efficient?
Most measures can be done in stages. Switching to aerothermal, adding solar, and upgrading windows are the most common. We help assess which measures give the most per euro invested for the specific property you're viewing — sometimes it's better to buy a home with good underlying orientation and insulation than one with expensive systems but the wrong aspect.
Where do you find these homes?
Modern, energy-efficient stock exists across the region but differs in character. Around Orihuela Costa and Torrevieja there's a large supply of newer townhouses and apartments with aerothermal systems and solar-ready wiring. Along the north coast around Jávea, Moraira and Altea you'll find more detached villas where owners have invested in complete energy solutions.
Read our complete buying guide for the full process, and get in touch — we'll review the energy status of any home you're interested in before you view it.
