Monaco, the second-smallest sovereign state in the world, has achieved an architectural and ecological milestone with the completion of the Mareterra eco-district. Extending the Principality’s territory by six hectares—an impressive 3% increase in land area—this €2 billion project blends luxury living, environmental stewardship, and cutting-edge design, setting a new standard for urban development on reclaimed land.
H.S.H Prince Albert II of Monaco, H.S.H Princess Charlene of Monaco, H.S.H Prince Jacques, and H.S.H Princess Gabriella Opening Mareterra — ©Direction de la Communication-Manuel Vitali
Mareterra’s design reflects Monaco’s commitment to harmonious integration of urban expansion with the natural environment. Prince Albert II emphasized this balance, stating, “Urban planning [is] fully in harmony with nature in order to achieve a subtle alliance between land and sea.” This vision has been realized through meticulous planning and the contributions of globally renowned architects, including Valode & Pistre, Renzo Piano Building Workshop, and Michel Desvigne.
La Pinède & La Vallée — Baldo Realty Group
This eco-district includes over 1,000 mature trees imported from Tuscany, a seawater thalasso-thermal loop for sustainable heating and cooling, and extensive solar panel installations providing 40% of the district’s energy needs. Anti-turbidity screens, habitat relocation, and caisson construction doubled as marine ecosystems, ensuring biodiversity preservation. With green roofs and a 10,000 m² expansion of the Grimaldi Forum, Mareterra embodies Monaco’s goals for carbon neutrality by 2050.
An Aerial View of Mareterra
Place Princess Gabriella in Mareterra Monaco — Baldo Realty Group
Mareterra offers an exquisite lifestyle for residents and visitors alike. Public spaces, including a marina, seaside promenades, cycling paths, and parks, make up nearly half of the district. The Blue Grotto marine observation area, meditation spaces, and pedestrian promenades foster community engagement and cultural enrichment. With 110 apartments, 10 villas, and 4 townhouses, each residence is a masterpiece of modern design and functionality. According to Caroline Roux from Financial Times, Mareterra is the “the most expensive real estate in the world.”
Place Princess Gabriella in Mareterra Monaco — Baldo Realty Group
Prince Albert II lauded the project, remarking on its “exemplary execution of the works, with specifications that are particularly demanding in environmental terms.” The district reflects a “peaceful nature of this territorial extension,” ensuring an oasis for residents amid Monaco’s vibrant energy.
Mareterra features four distinct residential offerings, each catering to unique tastes while maintaining an overarching commitment to luxury and sustainability.
Le Renzo Residence and Promenade Prince Jacques — Baldo Realty Group
Designed by the illustrious Renzo Piano Building Workshop, Le Renzo is the centrepiece of Mareterra’s architectural achievements. This residential complex reflects Piano’s characteristic emphasis on light and connection to the sea, with expansive glass facades and terraces offering panoramic views of the Mediterranean. Each apartment within Le Renzo epitomizes sophistication, featuring bespoke interiors, state-of-the-art amenities, and direct access to the district’s marina. With prices estimated at upwards of €120,000 per square meter, Le Renzo represents the pinnacle of exclusivity.
The Interior of an duplex apartment at Le Renzo Residence — Render by Anse du Portier
Les Jardins d’Eau Residence at Mareterra Monaco — Baldo Realty Group
The Les Jardins d’Eau residences, crafted by Valode & Pistre Architectes, are inspired by the serene beauty of water and greenery. These homes are situated amid lush landscaped gardens designed by Michel Desvigne, seamlessly blending natural and urban elements. Residents of Les Jardins d’Eau benefit from spacious layouts, private terraces, and access to shared amenities, including a tranquil water garden that serves as an oasis within the bustling Principality.
For those seeking unmatched privacy and grandeur, Mareterra’s Villas offer an extraordinary living experience. Designed by world-renowned architects such as Foster + Partners, Tadao Ando and Stefano Boeri, these 10 palatial villas are nestled within Mareterra’s one-hectare pine forest. Each villa boasts expansive living spaces, private pools, and meticulous landscaping that enhances both seclusion and aesthetic appeal. These residences are tailored for the most discerning individuals, offering a harmonious blend of nature, luxury, and cutting-edge design.
The rear of Les Villas in Mareterra — Financial Times
Les Townhouses represent a harmonious balance of contemporary luxury and intimate living. These four exclusive residences are designed to offer privacy while maintaining a close connection to the surrounding community and natural environment. With their sleek architectural lines, lush green terraces, and expansive glass facades, Les Townhouses provide an immersive living experience where modernity meets tranquility. Residents enjoy spacious layouts featuring open-plan interiors, state-of-the-art appliances, and bespoke finishes that reflect Monaco’s commitment to quality and elegance. Positioned near Mareterra’s marina and promenade, Les Townhouses provide a unique opportunity to enjoy the best of coastal living within a sustainable and thoughtfully planned eco-district.
Les Townhouses at Mareterra — Render by Anse du Portier
H.S.H Prince Albert II of Monaco speech the Mareterra Inauguration — ©Direction de la Communication-Manuel Vitali
Mareterra is more than a real estate development—it is a testament to Monaco’s innovative spirit and commitment to sustainability. Privately funded, the district’s success underscores the Principality’s ability to attract global talent and resources. The government will benefit from a tax on property sales, ensuring that the project contributes to Monaco’s economic vitality.
Céline Caron-Dagioni, Monaco’s Minister of Public Works, the Environment, and Urban Development, described the project as “a new chapter [that] is opening for the Principality,” emphasizing its role in ecological, economic, and urban planning continuity. The district’s appeal to UHNWIs is undeniable, offering a blend of privacy, community, and sustainable luxury.
Mareterra stands as a precedent for future urban expansion projects worldwide. With its anti-seismic design, advanced marine engineering, and commitment to environmental preservation, it addresses the challenges of rising sea levels and urban growth. This extraordinary eco-district underscores Monaco’s position as a global leader in sustainable innovation and luxury living.
Part of the land reclamation endeavour involved protecting coral reefs from damage — © Andromède Océanologie
As Prince Albert II aptly concluded during the inauguration, “The achievements that surround us brilliantly illustrate the expression of human genius, of men and women who are architects, landscape builders, urban planners or masons and many other specialties.” Mareterra is not just a triumph of engineering and architecture—it is a beacon of what the future holds for harmonious living between humanity and nature.
Artwork of Mareterra graciously blending into the Monaco Landscape — Baldo Realty Group
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