680 Madison Avenue Image
New York, New York, United States

680 Madison Avenue

Lendlease managed the structural rehabilitation and conversion of the former Carlton House Hotel into a luxury condominium building. The brown-brick building with three-story limestone base, circa 1951, was completely demolished from the interior, leaving only the landmarked façade. The entire structure, comprising both steel and reinforced concrete, was completely rebuilt.

680 Madison Avenue

Extell Development Company, Angelo, Gordon & Co.

New York, New York, United States


245,000 square feet

Construction Management, GMP

Beyer Blinder Belle Architects & Planners, Benjamin Thompson and Associates, Gould Evans Affiliates, Interiors

Project outcome

The scope of work included: a two-story addition; conversion of floors three through 18 to accommodate luxury condominiums; creation of open space from the cellar through the third floor, thereby creating 32,000 square feet of retail space and building amenities; restoration of the building exterior; and an extension of the existing building on the north side.

The first floor serves as the main lobby for the condominiums and includes four private entries for the upper four floors. Retail space also occupies the first, as well as the second. The first floor retail space features larger windows and doors while the second floor features massive ceiling heights resulting from the combination of the existing second and third levels.

In addition to the 68 condominiums, the project involved construction of a new, seven-story, 9,700 square foot limestone townhouse, constructed in a 35-foot gap between the building and its neighbor. The new townhouse building limestone building blends in with the limestone base of the condominium building.

The rehabilitation and restoration plan for the building, including the two-story addition, was approved by the New York City Landmarks Preservation Commission.