A Timeline of Monaco’s Mareterra Project

In the spring of 2013, H.S.H Prince Albert II followed in the footsteps of his late father Prince Rainier III, by announcing plans for an ‘offshore urban sea extension project’, marking the first tentative steps towards the creation of Monaco's ambitious Mareterra project.

The announcement by H.S.H Prince Albert came some 42 years after his father, known as the ‘Builder Prince’, created Fontvieille, a new residential area of 22 hectares to the west of Monaco. 

Prince Albert’s announcement signalled the start to arguably Monaco’s most exciting construction project ever, which is being overseen by the Prince’s Government. When finished the project will add six hectares to Monaco, offering 60,000 m² of residential space which is set to become Europe’s most exclusive address.

A time-frame to the completion of Mareterra Monaco

The Mareterra Monaco project, also known as Portier Cove or l’Anse du Portier, is set to be completed in 2025. Below you’ll find a timeline of the key stages of this unique eco-project:


May: International request for proposals to lead the project were announced. 


Throughout the year: Impact study carried out by Bouygues Travaux Publics and S.A.M. L’Anse du Portier, along with partners Tractebel, Andromède Océanologie and DHI. The aim of the study was to evaluate the environmental issues and constraints of the site and to integrate them into the project design and implementation methods.


July: S.A.M. l’Anse du Portier/ Bouygues Travaux Publics was awarded the concession contract, with the first phase of the maritime infrastructure estimated at €842 million.

Bouygues Travaux Publics is part of the Bouygues Construction Group, a subsidiary of the Bouygues Group, which includes Bouygues Telecom and TF1 media. 


August: Preparation phase begins for construction and actions taken to protect local animal and plant species. These included measures such as installing buoys to monitor and alert about turbidity and relocating 143 Pinna Nobilis (a protected species) to the Larvotto marine reserve. 


February: A 5 x 500-meter sound barrier was also erected along the Promenade des Champions, near the Japanese Gardens.

April: Maritime work begins in Monaco with the dredging of polluted sediment and riprap removal.

June: Dredging unpolluted sediment layer begins 

December: Arrival of the 200-meter fallpipe vessel Simon Stevin, loaded with specially prepared quarry material that had been stored and washed in the port of Marseille-Fos. Used to lay the foundation embankment, Simon Stevin is the largest underwater rock installation vessel in the world.


First Quarter: Embankment placement begins

July: Arrival of first caissons from Marseille, which will form a protective belt between Monaco’s new neighbourhood and the sea waves.


July: Caisson belt installation completed.

December: The land surface of Portier Cove is completed. 


Second Semestre: the second phase of the project begins. This is the €1 billion development of the new eco-district Mareterra Monaco where 400m2 apartments and 1,000m2 individual villas will be built. Also included in this phase will be the construction of a marina with pedestrian-only quays and a landscaped park. 


End of construction: Housing and commercial buildings completed.


End of construction: Marina and Grimaldi Forum extension completed.


Completion of the Portier Cove project.