Developer Macklowe Properties converted a Financial District office building into a condominium. The 1.25 million-square-foot tower is the largest office-to-residential conversion in New York City ...

Keystone Construction gutted and adapted the century-old Illinois Building at 17 West Market Street, built in 1925 as a luxury office building, and at a cost of $101 […] ...

The 50 South Sixth office building in downtown Minneapolis recently underwent a lobby renovation, bringing the amenity space up to par with other Class A office buildings in the area.

Luxury fashion conglomerate LVMH has already leased 150,000 square feet at 550 Madison Ave. — now it’s gobbling up another 150,000 square feet in the former IBM building at 590 Madison Ave.

Seventeen parking spaces would be offered to the residents of the proposed three-story building, which sits on a 20,000-square-foot site in the general business-office zone.