Royal inauguration of Mareterra in Monaco

With an investment of two billion euros, Mareterra redefines sustainable urban planning on a global scale. This colossal project, led by SAM L'Anse du Portier, embodies an innovative and sustainable solution to the challenges of regional development.

A visionary project for the Principality of Monaco

Designed by leading architects Valode & Pistre Architectes, Renzo Piano Building Workshop (RPBW) and landscape architects Michel Desvigne Paysage, Mareterra offers exceptional infrastructure:

- 60,000 m² of private housing and shops
- A marina with 30 moorings
- Three luxury residential districts
- Public gardens for relaxation
- 680 parking spaces
- A 3,500 m² extension to the Grimaldi Forum

The Mareterra marina

Tractebel’s mandate as Owner’s Engineer

As Owner’s Engineer, our Urban teams in Monaco, France and Belgium contributed their expertise to meet complex challenges on several strategic engineering packages:

- Structure and foundations
- Seismic study of the entire district, including maritime infrastructures
- Mobility
- Accessibility, parking, urban logistics
- Environmental impact study
- Energy efficiency, energy savings and renewable energies
- Eco-design and low-carbon construction
- Heating

Tractebel's Urban experts have been involved in this landmark project for nearly a decade

Complex feats of architecture in a seismic zone

The development includes two buildings designed by RPBW that represent boats in dry dock, each featuring an overhang section jutting out from the main structures. Of the two 23m cantilevers at either end of the buildings, the first 10m are built with reinforced concrete that, through embedded steel beams, transmits traction directly to the central reinforced concrete cores. The next 10m is composed of a ladder beam structure embedded in concrete, with reinforced concrete floors. The final three metres are made up of metal sections called “fingers” anchored to the ladder beam structure.

During construction, the cantilevers were continuously monitored for deformation and settlement at the level of the piles.

Mareterra expands Monaco's territory by three percent

“The newly built Mareterra district goes beyond traditional real estate ambitions: it is a reference for sustainable innovation. Mareterra focuses on low-carbon eco-design, integration of renewable energies for optimum energy efficiency, and the preservation of surrounding marine and terrestrial ecosystems. Congratulations to our Urban teams, whose expertise enabled them to navigate the vast complexities inherent to the challenges of development projects in Monaco.”

Fabrice FERNANDEZ, Tractebel Project Director for Urban in Nice & Monaco

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