55 Water Street

Case Study of 55 Water Street


New Water Street Corp. 

LEED Certification Level:

LEED O+M v3 (v2009) in 2021

LEED Gold in 2017



Total Square Feet:


SIG team members that worked on this project:

Asa Posner - LEED PM

Libby Dunne - LEED QA/QC

Andrew Cheek - LEED Engineering

Jeff Stewart - Engineering QA/QC

Building Address:

New York, NY 

Year Built:


55 Water Street


55 Water Street is a 53-story, Class A office building encompassing 3,486,407 square feet in the heart of downtown Manhattan. The building’s superior infrastructure, amenities, and on-site management combined with the convenience of its “Elevated Acre” public park, adjacent Veteran’s Memorial Plaza, and proximity to the waterfront have made 55 Water Street one of Manhattan’s most sought after properties. Originally built in 1987, the building has been updated to include modern, luxurious finishes and amenities, including a fully-clad marble lobby and high-performance building infrastructure. At nearly 3.5 million square feet, 55 Water Street is the largest office building in New York City and the second largest privately-owned office building in the United States.

As the building occupies the northeastern section of the Water Street block between Old Slip and Broad Street, the property has easy access to mass transportation around the tri-state area, including the Staten Island Ferry and several MTA subway lines. The building is also within walking distance to other major office buildings, department stores, hotels, retail establishments, restaurants, and the Financial District and World Trade Center site. With such a large footprint, the building performs well on energy efficiency metrics, earning an ENERGY STAR label every year since 2017 and currently showing an ENERGY STAR score of 80. The building earned its initial LEED v3 EB: O+M Gold certification in 2017 and is recertifying at LEED Gold in 2021, lead by SIG’s consultants and engineers.