Marketing has begun for the 12-story residential condominium project by Brack Capital Real Estate USA at 15 Union Square West.

The building was originally a five-story cast-iron building designed in 1870 by John Kellum for Tiffany & Co., and Brack is adding 7 floors to create a total of 36 apartments.

Eran Chen of Perkins Eastman is the architect for the conversion that will retain the original ceiling heights of 16 feet on the lower floors as well as the cast-iron arches on those floors. The building will be wrapped in a black zinc-and-glass facade and its top floors will be set at different angles and have terraces.

The building will have a 50-foot lap pool "complemented by Bisazza mosaic tile finishes on the floors and changing LED lighting in the cabana nooks," as shown in the photograph at the right. It will also have open kitchens with bronze-framed cabinetry with frosted glass inserts and changing LED lighting above the cabinets.

Many of the apartments will have fireplaces and window blinds, lighting and temperature are controlled by a customized touchpad.

The building will have 24-hour doorman and concierge services with a live-in residence manager, a fitness center plus private storage facilities, valet parking, and concierge service by Luxury Attache.

Master baths have cast-iron soaking club with stainless claws feet, and double-sink vanities.

Powder rooms have mahogany paneled walls and moldings and black granite floors and a stainless steel pedestal sink and water closet.

The residences at 15 Union Square West include two bedroom homes ranging from 1,763 to 2,189 square feet and three bedroom homes that range from 2,370 to 3,164 square feet.

Prices range from about $4,110,000 for a two-bedroom unit with 1,959 square feet to about $7,770,000 for a three-bedroom unit with 2,370 square feet.

Vicente Wolf is designing the interiors.

Brack Capital Real Estate USA, of which Moshe Dan Azogui is the president, last fall acquired the building, which used to be the Amalgamated Bank Building on the southwest corner at 15th Street, for $80 million.

Tiffany moved from this location in 1903 to 401 Fifth Avenue at 37th Street and is now at 57th Street and Fifth Avenue.

Brack Capital Real Estate's other New York projects include the Element at 555 West 59th Street, the Olcott at 27 West 72nd Street, 90 West Street, the majestic 90 West Street, the Cass Gilbert designed landmark damaged during 9/11, 230 Riverside Drive, 240 East 27 Street, 150 East 85 Street, The Chartwell House at 1760 Second Avenue, the 298-room Hilton Garden Inn located at 63 West 35th Street, The Greystone, a 420-unit luxury rental apartment at West 91st St. and Broadway and a new boutique hotel on Grand Street.