Luxembourg, July 1, 2026 – La Cloche d’Or, the first BREEAM Outstanding-certified building in Luxembourg, is now owned by State Street Services; this is Grossfeld’s second real estate transaction in 2026 to exceed 100 million euros in the Grand Duchy.
The transaction is officially complete
With the completion of the sale of all shares in Stairs S.à r.l., Grossfeld—a joint venture between Nextensa and Promobe—is transferring full ownership of the Stairs building, which was delivered on July 1, 2026, in the Cloche d’Or neighborhood, to State Street Services Luxembourg. This major deal marks Grossfeld’s second real estate transaction of the year to exceed the 100 million euro mark.
A National First: BREEAM Outstanding in Luxembourg
Stairs marks a turning point for the Luxembourg real estate market. With its BREEAM Outstanding certification, it has become the first building in the country to achieve the highest level of this internationally recognized environmental standard. This achievement stems from a requirement established at the very outset of the project.
Recyclable materials, a green roof, an A+ energy efficiency rating, and WELL Gold certification for occupant well-being: every design decision was guided by a strong commitment to ESG principles. Stairs is not just a high-performance building; it is proof that architectural excellence and environmental responsibility now go hand in hand at the highest level.
La Cloche d’Or: The Leading Name in Commercial Real Estate
The Cloche d’Or neighborhood offers an ideal environment for living and working. Developed according to the principles of New Urban Living, it combines energy efficiency, mixed-use development, and quality of life. Its DGNB Platinum certification attests to its commitment to sustainable mobility and urban quality.
The presence of Luxembourg City’s largest park, the Cloche d’Or shopping center, and direct access to the tram and major roadways further enhance the growing appeal of a neighborhood that continues to attract leading players.
Thanks to the sustainable approach adopted by its developers, the new Cloche d’Or neighborhood has earned the highest level of certification, “Platinum,” awarded by the leading German certification body, DGNB
Grossfeld: A Track Record in Major Transactions
This closing underscores Grossfeld’s ability to successfully complete complex transactions and generate high-profile deals in the Luxembourg real estate market. By once again surpassing the 100 million euro mark, Grossfeld is solidifying its position as a key player in Luxembourg’s commercial real estate sector.
Stairs – At a Glance
Location : Cloche d’Or, Luxembourg City – at the intersection of the two main boulevards
Area: 9,999 m²
Levels: 1 ground floor + 11 stories
Workspaces: 975 workstations
Certifications: BREEAM Outstanding (the first building in Luxembourg) · WELL Gold · Energy A+
Parking: 52 underground parking spaces
Architect: Moreno Architecture and Associates (Stefano Moreno)
Developer: Grossfeld – a joint venture between Promobe and Nextensa
Owner: State Street Bank Luxembourg
Closing: July 2026
