Sustainable Cities in Spain: Top 10 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.  

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What is a sustainable city? 

To talk about sustainable cities in Spain, it is essential to first understand what a sustainable city is. Essentially, it is one that seeks to enhance the quality of life of its citizens while meeting all their needs with minimal environmental impact. 

Sustainable cities manage eco-friendly resources under environmental criteria. Their policies aim to reduce pollution, use energy efficiently, promote sustainable mobility, and protect ecosystems.

Main features

Spain’s main sustainable cities share the following key characteristics with other sustainable locations around the world:

  • 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 housing is becoming a key real estate proposal, driven by rising environmental awareness.
Real estate stakeholders are exploring green alternatives to reduce environmental impact and operating costs.

Green buildings attract buyers due to their energy efficiency and improvements in residents’ quality of life. The use of renewable energy and other eco-friendly practices make them ideal habitats 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. Here are some of them:

  • Energy efficiency has a decisive impact on reducing operating costs and optimizing basic services. 
  • The growing demand for eco-friendly real estate drives up its market value.
  • Environmental legislation is becoming increasingly strict, meaning that sustainable developments help companies 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 investment is not only about profitability; it also involves measuring the human, social, and environmental impact of a project. With that in mind, here are the most recommended sectors:

Green Construction

Includes any sustainable building constructed for waste management, rainwater harvesting, or transport infrastructure for efficient mobility (such as bike lanes).

Efficient housing

Investing in an energy-efficient home is offset by energy savings derived from 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’s not just about attracting tourists, but also about adapting infrastructure, roadways, and services to meet environmental regulations.

You might be interested in: domotica 2025.

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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. Investments in solar or wind energy entitle you to deduct a percentage of those expenses from your tax burden.
  2. Access to tax credits. These credits are approved on the condition that the entire amount is invested in producing clean energy.
  3. Low-interest loans and benefits for circular economy initiatives, among others.

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

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 worth noting that Domoblock has significant investments in Valencia and Zaragoza and plans to expand to other sustainable cities such as Madrid and Málaga. The company has played a notable role in increasing investments in Spain by committing to sustainable architecture.  

Are sustainable cities safer to live in or invest in?

Sustainable cities are safer to live in because they are designed for citizens’ well-being. Vehicle traffic is lower, public lighting is better, there are more green spaces and pedestrian areas, and the air is cleaner. 

When it comes to investing, safety depends on understanding the project, its feasibility, transparency, and ESG compliance. However, every investment involves some level of risk.

What risks are involved in this type of investment?

There are currently no universal standards for ESG investments that allow for measuring a company’s efficiency and sustainability. Another concern is greenwashing—when companies exaggerate or falsify their sustainability practices to obtain funding.  

On the other hand, investment opportunities can be limited due to strict environmental measures. Finally, it is essential to remember that many sustainable investments take a long time to become profitable; this does not necessarily mean the capital invested will be recovered. 

Recommendations for successful investing

To invest in sustainable projects without losing money, 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 investments, corporate responsibility, and environmental regulations. 

Invest 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 property market starting from just €200. Property tokenization has democratized the sector, allowing you to invest in real assets with high returns in periods ranging from 8 to 12 months. It is a smart alternative to traditional methods.

Whether you are a beginner or an experienced investor, Domoblock offers ideal options for you. You will be able to explore different types of properties and easily diversify your investments. In addition, you will receive continuous guidance from a specialized team that will accompany 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 a single click, you can turn your savings into profitable opportunities. Take the leap toward a more accessible, profitable, and digital investment!

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Conclusion

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

In addition, there are Smart City projects and many more opportunities to choose from to improve urban life and extend the planet’s lifespan. Sustainability is no longer optional—it is an imperative to guarantee the future.

Sergio Navarro

Expert in blockchain, investments and personal finance.

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Madrid | Moncloa Argüelles

Calle Arcipreste de Hita, 14

Under study
Flipping house
DOMO-MAD-5

Funded:

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-

Objective:

3.582.749,16 €

Estimated duration:
10 meses
Rentabilidad anual estimada
14%
Minimum ticket:
200€
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