United Nations Consolidation Building

New York, NY

This project involved providing cost estimating services for alternative design schemes for the United Nations Consolidated Building. This project consists of the design/construction of a new “Class A” office building (core & shell + tenant fit-out) for the United Nations, standing at 37 occupied stories and more than 900,000sf of space, with a tunnel or bridge providing a connection to the existing UN headquarters across 42nd Street.

The interior scope includes a workplace environment, along with the appropriate people-mover systems, IT, security, support services and food service spaces typical for a building of this stature. An extensive green roof is planned for the 16th floor setback at the cafeteria level, and the building is intended to be a high performance, environmentally sustainable project equivalent to LEED® NC Gold Certification.

The foundation system incorporates vehicle and subway tunnel systems. Two structural systems were studied – flat plate concrete and structural steel. The façade system is comprised of blast-resistant custom fritted glass curtainwall system.

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