Top 10 Sustainable Cities in Spain to Invest In

August 18, 2025

Spain' s sustainable cities belong to a global group of urban areas that have chosen sustainability as a collective goal. These are cities committed to providing a better quality of life for their residents while improving environmental stewardship. 

Do you want to learn more about this topic and discover which Spanish cities offer excellent sustainable investment opportunities? We invite you to read this insightful post.  

New Call to Action

What is a sustainable city? 

To talk about sustainable cities in Spain, it is essential to understand what a sustainable city is. Essentially, it is one that seeks to improve citizens’ quality of life by managing all their needs with minimal environmental impact. 

These cities manage eco-friendly resources based on environmental criteria. Their policies aim to reduce pollution and promote efficient energy use. They also encourage sustainable mobility and the protection of ecosystems.

Main features

Sustainable cities have very specific characteristics that distinguish them from any other type of city:

  • Efficient basic services: Citizens’ quality of life is reflected in their access to efficient and sufficient public services. 
  • Generation of Renewable Energy: Clean energy production, such as solar power, enhances energy efficiency.    
  • Preservation of green spaces: These cities stand out for legislation aimed at protecting their natural areas.
  • Waste management and recycling: Proper disposal of solid waste and a culture of recycling are essential for sustainability.

Spain' s mainsustainable cities share the following key characteristics with other sustainable locations around the world: 

How Does Sustainability Affect Real Estate Market Value?

Eco-friendly or sustainable homes have become a key real estate offering due to growing environmental awareness; as a result, industry players are exploring green alternatives to reduce environmental impact and operating costs.

Green buildings attract buyers due to their energy efficiency and the improved quality of life they offer to occupants. The use of renewable energy and other eco-friendly practices makes them ideal assets for investment. 

You might be interested in: What is a passive house?.

Benefits of Investing in Sustainable Cities 

Investing in green buildings offers both environmental and economic advantages. Below are some of these benefits:

  • Energy efficiency has a decisive impact on reducing operating costs and optimizing basic services. 
  • The growing demand for eco-friendly real estate properties drives up their prices in the real estate market.
  • Environmental legislation is becoming increasingly stringent, which makes sustainable developments a way for companies to comply with regulations.

Sustainable cities in Spain contribute to the fight against global warming. Their contributions include reducing the carbon footprint.

Recommended Sectors for Investing in Sustainable Cities

Sustainable investing does not focus solely on profitability; it also involves measuring the human, social, and environmental impact of a project. With this in mind, the following are the most recommended options:

Green Construction

It includes any sustainable infrastructure built for waste management, rainwater harvesting, or efficient transportation systems (such as bike lanes).

Efficient housing

Investing in an energy-efficient home is offset by the energy savings generated through the use of clean energy and other sustainable systems. A building designed under ESG criteria allows for the total investment to be recovered in the medium term.

Sustainable tourism

It is an attractive sector for investors due to its profitability and ecological contribution. It is not only about attracting tourists, but also about adapting infrastructure, transportation networks, and services to environmental regulations.

You might be interested in: Smart home trends for 2025.

New Call to Action

This type of tourism is based on responsible and respectful practices that have minimal impact on the tourist destination. 

Do sustainable cities offer tax incentives for investors?

Spain' s sustainable cities offer various tax incentives, including:

  1. Tax deductions for investing in clean energy: Investing in solar or wind energy entitles you to deduct a percentage of those expenses from your tax liability.
  2. Access to tax credits: These loans are approved on the condition that the entire amount is invested in clean energy production.
  3. Exemptions and Subsidies: Tax exemptions are offered to companies that invest in renewable energy. Subsidies fund research in sustainable development.

There are also low-interest loans and incentives for circular economy initiatives, among others.

10 sustainable cities to invest in Spain

The top 10 sustainable cities in Spain to invest in are as follows:

Madrid: Stands out for optimizing urban mobility, reducing pollution levels, and pursuing energy efficiency.

Barcelona: Promotes the use of solar and wind energy for the operation of public and private infrastructure.

Valencia:The Green Capital of Europe focuses on preserving green areas and pedestrianizing its roadways. 

Santander:This smart city features intelligent sensors that provide real-time information on the needs of the population.

Seville: Its sustainable tourism and mobility plans, supported by digitalization, have made it the epicenter of smart tourism in Europe.

Malaga: Integrates clean energy sources into its electrical system, improving overall efficiency. Its goals are energy savings and ecological development.

Vitoria-Gasteiz: The green city par excellence. In addition, its waste management and water management systems are considered pioneering in Europe.

Zaragoza. Its sustainable mobility system has minimized dependence on private cars.

Murcia: Chosen to implement the Smart City project, this city focuses all its efforts on caring for its natural spaces.

Bilbao: A friendly city with a special quality for protecting pedestrians. It has significantly reduced its CO₂ emissions.

We recommend that you explore all our projects in: real estate investment in Madrid, real estate investment in Alicante, real estate investment in Zaragoza and real estate investment in Valencia.

Which sustainable city offers the highest returns?

All the cities included in this top 10 ranking offer high returns for sustainable investments. Madrid, however, leads the ranking as the most sustainable Spanish city with the greatest investment opportunities.s.  

It is important to note that Domoblock has significant investments in Valencia and Zaragoza. The company also has expansion plans in other sustainable cities such as Madrid and Málaga. Domoblock has made a notable contribution to the growth of investment in Spain by committing to sustainable architecture.  

Are sustainable cities safer places to live or invest?

Sustainable cities are safer places to live because they prioritize citizens’ well-being. Vehicle traffic is reduced, public lighting is improved, there are more green spaces and pedestrian areas, and the air is cleaner. 

When it comes to investing, security depends on how well the project is understood, its viability, transparency, and how ESG criteria are managed. However, all investments involve some level of risk.

What risks does this type of investment involve?

There are no standardized ESG investment criteria that allow for measuring a company’s efficiency and sustainability. Another issue is the misrepresentation or exaggeration of a company’s sustainable practices in order to obtain financing.  

On the other hand, investment opportunities are reduced due to the strictness of environmental regulations. Finally, it is essential not to lose sight of the fact that many sustainable investments require a long time to become profitable; this does not guarantee that the invested capital will be recovered. 

Recommendations for Successful Investing

To invest in sustainable projects without risking your capital, it is important to consider the following recommendations:

  • Define your priorities according to your values. These priorities should align with the investment opportunities and the impact you seek from the project. 
  • Analyze available options. Focus on evaluating each investment opportunity to choose the one most aligned with your goals.
  • Study ESG criteria. You need to understand the environmental, social, and governance standards and how they apply in financial terms. 

Finally, seek advice from experts in sustainable investing, corporate responsibility, and environmental regulations. 

Start Investing in Real Estate from €200 with Domoblock

Real estate investment is no longer an exclusive privilege. With Domoblock, areal estate investment platform, anyone can access the real estate market starting from just €200. Property tokenization has democratized the sector, allowing you to invest in real assets with high returns over periods ranging from 8 to 12 months. It is a smart alternative to traditional investment methods.

Whether you are a beginner or an experienced investor, Domoblock offers options tailored to your needs. You can explore different types of properties and easily diversify your investments. In addition, you will receive ongoing guidance from a specialized team that will support you every step of the way. 

Domoblock is also embracing the sustainability trend by incorporating eco-friendly features, such as bioclimatic design, into its houses flipping projects in Valencia and Zaragoza. This demonstrates that sustainable real estate investment not only helps the planet but can also be highly profitable.

With just one click, you can turn your savings into profitable opportunities. Dare to take the leap toward a more accessible, profitable, and digital investment!

New Call to Action

Conclusion

Spain' s sustainable cities offer potential investors a wide range of opportunities to invest in the country’s future. These cities provide investment opportunities in green infrastructure, sustainable tourism, and sustainable mobility.

In addition, there are Smart City projects and many other initiatives to choose from to improve quality of life for citizens and extend the life of the planet. Sustainability is no longer an option; it is an imperative to ensure the future.

Sergio Navarro

Expert in blockchain, investments, and personal finance.

Share it on your social networks.

Do you like what you’re reading?

Subscribe to Our Newsletter

Do you like what you’re reading?

Subscribe to our newsletter!

Zaragoza | Casco histórico

Felipe Sanclemente, 4

Under review
House flipping
DOMO-ZGZ-8

Funded:

-

Objective:

1.057.019,75 €

Estimated duration:
9,5 meses
Estimated annual return:
12,02%
Minimum ticket:
200€
Talk to other investors and ask your questions in our Telegram group.

Related Articles