Les Groues: Construction Sites for Future Public Spaces

Juin 2026

Little by little, the Groues neighborhood in Nanterre—once a collection of brownfield sites—is giving way to a vibrant community that is fully integrated into the city and connected to La Défense and the area’s higher education institutions. With excellent access via the RER E line and, in the future, the Grand Paris Express Line 15, this neighborhood will serve as a hub for all local amenities in western Île-de-France.

Over the past several months, numerous projects have been completed, but there are still many construction sites active, particularly in public spaces.

Construction work on Nina Simone and Marie Marvingt alleys

Marie Varvingt Alley:

This alley will be exclusively for pedestrians. It will include:

a planted strip;
a 4-meter-wide paved pedestrian path;
a planted swale for rainwater harvesting.

Nina Simone Alley:

This alley will have very limited vehicle traffic. It will include:

a planted infiltration swale;
a sidewalk;
a 5.50-meter-wide roadway.

Project timeline:

Work began near the Les Hallizées residence to enable the opening of the Marie Marvingt and Nina Simone alleys, as well as the sidewalk on Rue François Hanriot.

Construction schedule:

Start of construction: 3rd quarter of 2025
Partial completion: 4th quarter of 2026
Completion: 3rd quarter of 2027

For any questions: groues2030@parisladefense.com

Construction on François Hanriot Street

François Hanriot Street will undergo a complete redevelopment. It will include:

wide sidewalks paved with red asphalt;
one-way bike lanes;
landscaped swales for rainwater harvesting;
a 6-meter-wide roadway.

Construction schedule:

Start of construction: 3rd quarter of 2025
Completion in two phases: 3rd quarter of 2027 for the eastern section, and 2028 for the rest of the street

For any questions: groues2030@parisladefense.com

Jardin des Rails Nord

The Jardin des Rails Nord will be a public space that is closed at night. It will include:

a tree-lined swale (3 to 6 meters wide) for rainwater harvesting;
a 3.5-meter-wide stabilized path;
several social areas, including:
- planted strips;
- play areas (notably for pétanque);
- tables;
- community gardens.

Project timeline:

In 2026, work on the Jardin des Rails Nord will continue, with the garden scheduled to open in early 2027.

Construction schedule:

Start of construction: 3rd quarter of 2025
Completion: 4th quarter of 2026

For any questions: groues2030@parisladefense.com

Work on the RTE power grid

RTE, the electricity transmission system operator, is replacing a 5.4-kilometer-long 225,000-volt underground power line. The construction site is located between Rue François Hanriot and Avenue François Arago in Nanterre. The project is being commissioned by RTE and carried out by the contractor Terca.

This work is necessary to:

secure the power supply;
support the region’s development;
continue to provide power to 1 million people.

Access will be maintained (for residents, emergency services, and deliveries), pedestrian paths will be secured, and the street will be closed in sections.

Construction schedule:

Start of work: April 2026
Completion: August 2026

For any questions: @ RTE: Bachir AKDIM, bachir.akdim@rte-france.com / Contractor: TERCA, Ahmed KEDRI, ahmed.kedri@terca.fr.