SL Green Realty plans a dramatic transformation for their existing 13-story office building at One Madison Avenue. Designed by architects Kohn Pedersen Fox, the plan calls for 18 new floors of Class-A office space, tenant amenities, and more than an acre of outdoor terraces built atop the existing building.
The present 13-story structure will first be reduced to nine floors to serve as a podium for the 18 new floors to be constructed above.
Designed as a marquee glass tower, the new structure will have nearly 1.5 million square feet of rentable space, offering 60-foot column-free spans and 14-foot ceilings on each level.
Also included as part of the redevelopment and expansion, are a revitalized lobby and entry areas, expanded retail space, a new auditorium, and additional events space.
The 1.1 million-square-foot granite building is fully leased by Credit Suisse, which will move out when its lease expires in December or next year.
Construction is expected to begin in early-2021, following the expiration of tenant lease.