Data Center Campus
Colt: Paris Les Ulis 2 Campus
Colt DCS's two-building data center campus on Avenue du Pacifique in the Courtaboeuf business park, Les Ulis, on the former Quantel laser plant site about 1 km north of Colt's Paris South West data center. First building due in 2029, with expansion planned through 2031.
Campus at a Glance
Colt DCS's second Les Ulis site ("Les Ulis 2") sits at 2 bis Avenue du Pacifique in the Courtaboeuf business park, Les Ulis (Essonne), about 1 km north of Colt's operating Paris South West data center. Colt plans two buildings: Colt Paris 5 for cloud and high-density AI workloads, and Colt Paris 6 for large-enterprise colocation.
Land. The 5.3-acre parcel (cadastral BR 245, about 21,500 m²) held the Quantel (Lumibird) laser plant until Quantel moved to Villejust in December 2022.
Power. Colt holds a contract for a direct connection to RTE's transmission grid.
Design. The buildings use hybrid air and liquid-to-chip cooling, with zero water waste in cooling, heat recovery where possible and 100% renewable power. The site is carrier-neutral. euNetworks, Covage and Colt fiber run nearby; Sipartech, Zayo and Celeste are available at Colt's Paris South West site.
Milestones. Colt announced Paris 5 and 6 in May 2025 as part of its €2.3 billion French program.
Buildings
Sites on this Campus
| Site | Operator | Status | Operational | Building Size | Built |
|---|---|---|---|---|---|
| Colt: Les Ulis PAR5 | Colt Data Centre Services |
Planned
|
— | — | 2029 |
| Colt: Les Ulis PAR6 | Colt Data Centre Services |
Planned
|
— | — | 2031 |
Map and Nearby Locations
Colt: Paris Les Ulis 2 Campus Power Growth Over Time
Developer
In 2014, Colt entered the APAC region when it acquired KVH and its seven data centers in across Japan, Singapore, Hong Kong and South Korea.