JERSEY CITY-Tower Insurance Co. of New York has signed a long-term lease for 76,892 square feet at Mack-Cali’s Harborside Financial Center in downtown Jersey City.

The property and casualty insurance provider will occupy space at the Plaza 2 building, one of the original Pennsylvania Railroad structures first converted in the 1980s to form the core of Harborside Financial Center. There are now five buildings comprising 3.1 million square feet at the complex. Construction of a 500-unit residential tower is expected to begin next year.

Harborside Financial is set within walking distance of a PATH train station and commuter ferry stop, and includes restaurants, retail, hotel, office and residential amenities such as health clubs and child care. The complex is now 97.3% leased, Mitchell E. Hersh, Mack-Cali president and CEO, says in a release.