Property News & Expat Guide for Spain

Essential tips to boost energy efficiency in your Spanish home
Friday, May 8, 2026

For homeowners in Spain, improving energy efficiency is more than just a cost-saving measure—it's a long-term investment in comfort, sustainability, and property value. With the country’s wide-ranging climate conditions, from the warm Mediterranean coast to the cooler northern and inland regions, making your home more energy efficient can have immediate and lasting benefits. By reducing energy consumption, you can lower your utility bills, minimise your environmental footprint, and increase the overall comfort of your home.

This guide outlines the key reasons why energy efficiency should be a priority and offers practical steps to improve your property’s performance. Additionally, we explore some of the latest innovations and financial incentives that make energy efficiency upgrades even more appealing for Spanish homeowners.

Spanish-style house with solar panels installed on the roof for energy efficiency — Installing solar panels help reduce energy costs and increase property value by utilising the abundant sunlight in Spain. Photo: Freepik

Why is improving energy efficiency in your Spanish home important?

Improving energy efficiency in your home goes beyond saving money on bills—it's about maximizing comfort, sustainability, and the effectiveness of every energy unit used. An energy-efficient property maintains ideal living conditions, like temperature and lighting, without unnecessary waste. This means lower utility costs, increased comfort, and a reduced environmental footprint, all while optimizing the performance of your home’s systems, appliances, and structural elements (such as insulation and windows).

Energy efficiency plays a critical role in managing living expenses, maintaining a comfortable environment, and contributing to sustainability goals. Here are some of the key reasons why homeowners in Spain should prioritise energy efficiency:

Lower utility costs: Energy prices in Spain are among the highest in Europe, which makes energy efficiency upgrades particularly valuable. Homes that use less energy for heating, cooling, and other functions see significantly lower monthly bills. For example, in regions with hot summers, where air conditioning is essential, energy-efficient homes can cut electricity bills by 20% or more.
Increased comfort: An energy-efficient home not only helps maintain consistent temperatures but also provides better indoor air quality. Proper insulation, efficient windows, and well-maintained systems prevent uncomfortable drafts and hot or cold spots, creating a more pleasant living environment year-round.
Environmental benefits: With a growing global focus on sustainability, improving your home’s energy efficiency is an effective way to reduce your carbon footprint. Spain’s renewable energy goals, such as achieving 42% of energy from renewables by 2030, mean that homeowners can contribute directly to national efforts by making their properties more sustainable.
Higher property value: Energy-efficient homes are increasingly in demand among property buyers in Spain. Features such as solar panels, advanced insulation, and modern heating systems can add significant value to a home. For those looking to sell or rent out their property, these upgrades make the home more attractive to prospective buyers or tenants who prioritize sustainability and lower operating costs.
Avoiding costly repairs: Additionally, regular maintenance and upgrades to improve energy efficiency not only enhance comfort but can prevent larger, more expensive repairs. Homes with well-maintained heating systems and proper insulation last longer and require less frequent repairs. Addressing inefficiencies now can save homeowners from costly breakdowns later.

How to improve energy efficiency in your Spanish home

Now, let’s explore practical strategies for improving energy efficiency. These detailed, actionable tips will help boost the energy performance of your Spanish property, maximising comfort while minimising unnecessary energy costs.

1. Start with an energy audit

An energy audit provides a clear overview of your home’s current efficiency and highlights areas where upgrades will be most impactful. In Spain, local authorities and private companies offer professional energy audits that evaluate your home’s:

Insulation in walls, ceilings, and floors
Heating and cooling system performance
Window and door sealing for air leakage
Appliance and lighting efficiency
Potential for integrating renewable energy, such as solar power

2. Insulate key areas of your home

Proper insulation is essential to improving energy efficiency in any home. Many Spanish homes, especially older ones, lack sufficient insulation, which leads to higher energy consumption for heating and cooling. Spain’s varied climate, ranging from hot summers in the south to cooler winters in the north, makes insulation a key factor for energy conservation.

When considering insulation, focus on the following areas:

Key findings

The survey highlights several trends shaping investor sentiment across the European property market.

Spain ranked first among European countries for expected real estate returns in 2026, named by just under half of cross-border investors
Madrid holds second place among Europe's most attractive cities for investment, retaining its position for the second consecutive year
Barcelona ranks fourth — making Spain the only country with two cities in the top five, alongside London (1st), Warsaw (3rd) and Milan (5th)
89% of surveyed investors expect purchasing activity to increase or remain stable in 2026
83% expect sales activity to increase or remain steady, signalling improving alignment between buyers and sellers on pricing
The residential sector remains the most preferred asset class for the second consecutive year, accounting for 34% of responses

Spain's 2025 investment figures

Total real estate investment in Spain reached €18.4 billion in 2025, representing a 31% year-on-year increase and the highest volume since 2018, exceeding the European average growth rate. Madrid and Barcelona together accounted for 58% of the total investment volume, reflecting strong demand from institutional investors as well as high-spending property buyers.

Taxes when buying a property

In Germany, the main purchase tax is the Grunderwerbsteuer, which varies by federal state — from 3.5% in Bavaria to 6.5% in states such as North Rhine-Westphalia, Brandenburg, and Schleswig-Holstein. Notary and land registry fees add a further 1.5% to 2%. Since 2020, estate agent fees are split equally between buyer and seller by law.

In Spain, what you pay depends on whether the property is new or second-hand — a distinction that does not exist in the same way in Germany:

For a resale property, you pay ITP (Impuesto sobre Transmisiones Patrimoniales), Spain's equivalent of the Grunderwerbsteuer. Rates range from 6% in Madrid to 7% in Andalucía and 7.75% in Murcia. Cataluña applies a progressive scale: 10% up to €600,000, 11% from €600,001 to €900,000, 12% from €900,001 to €1,500,000, and 13% above that — making it one of the most expensive regions for resale purchases. The Valencian Community applies 10% as its standard rate, though this is set to reduce to 9% for properties under €1 million from June 2026.
For a new-build property, ITP does not apply; instead you pay IVA (VAT) at 10% of the purchase price, plus AJD (stamp duty) of between 0.5% and 1.5% depending on the region. Unlike Germany, agent fees in Spain are typically paid by the seller, though buyers should always confirm this in their purchase agreement.

Total purchase costs in Spain — including notary and land registry fees — typically add 10% to 13% on top of the purchase price for resale properties, and 12% to 15% for new builds. Our guide to taxes when buying a property in Spain covers each of these in full detail.

**Property purchase taxes and costs: Germany vs Spain**
Taxes & Costs	Germany	Spain
Purchase tax (resale)	Grunderwerbsteuer 3.5%–6.5% by state	ITP 6%–13% by region
Purchase tax (new build)	Grunderwerbsteuer 3.5%–6.5%	IVA 10% + AJD (stamp duty) 0.5%–1.5%
Notary and registry	~1.5%–2%	~1%–2%
Agent fees	Split equally between buyer and seller by law	Typically paid by the seller

A worked example: €300,000 purchase

To make the comparison concrete, consider a €300,000 property purchase.

Resale property:

Bavaria (resale): Grunderwerbsteuer at 3.5% = €10,500, plus notary and registry fees of approximately €5,000. Total additional costs: approximately €15,500, or around 5.2% of the purchase price.
Andalucía (resale): ITP at 7% = €21,000, plus notary and registry fees of approximately €3,500. Total additional costs: approximately €24,500, or around 8.2% of the purchase price.

New build:

Bavaria (new build): The same Grunderwerbsteuer of 3.5% applies = €10,500, plus notary and registry fees of approximately €5,000. Unlike Spain, Germany does not apply VAT to residential new-build purchases by private buyers. Total additional costs: approximately €15,500, or around 5.2% of the purchase price — identical to a resale purchase.
Spain (new build): IVA at 10% = €30,000, plus AJD at 1.2% = €3,600, plus notary and registry fees of approximately €3,500. Total additional costs: approximately €37,100, or around 12.4% of the purchase price.

The comparison illustrates two important points. First, in Germany the tax cost of buying is the same whether the property is new or second-hand — the Grunderwerbsteuer applies equally to both. In Spain, the new-build route carries a significantly higher upfront tax burden, which is one of the most important distinctions for German buyers to understand. Second, even a resale purchase in Andalucía costs notably more in tax than the equivalent purchase in Bavaria, though the gap is manageable with careful budgeting.

Annual property taxes

In Germany, the annual Grundsteuer is a local levy calculated using the assessed property value, a federal rate, and a local municipal multiplier. Following the 2025 reform, values have been updated to reflect current market levels. In practice, annual amounts are very low — almost symbolic in many cases — with a typical Berlin apartment generating a bill of around €80 to €150 per year.

In Spain, the equivalent is IBI (Impuesto sobre Bienes Inmuebles), also a municipal tax based on the cadastral value of the property rather than the market value. IBI rates typically range from 0.4% to 1.1% of the cadastral value. Bills are broadly comparable in many cases, though Spain shows greater variation and can be noticeably higher in prime locations such as Marbella or Ibiza. Full details on how IBI is calculated and when it falls due are in our guide to IBI property tax in Spain.

One important difference for non-resident owners is Spain's imputed income tax on unrented properties, filed via Modelo 210. If you own a property in Spain and do not rent it out, you are still required to pay a modest annual tax calculated on a percentage of the cadastral value. Germany has no equivalent to this obligation, and it catches many foreign buyers by surprise.

Taxes when selling a property

Both countries tax capital gains on property, but the rules differ in important ways: