WHITE PLAINS, NY-Despite tough conditions for suburban office markets outside New York City, Westchester County is continuing to show strength. National law firm Wilson Elser inked a 15-year, 125,000-square-foot lease at 1133 Westchester Ave., a 600,000-square-foot class A office building owned by RPW Group in White Plains.

The company—which first opened its doors in Westchester in 1990 with 22,000 square feet—will relocate from its current home at 3 Gannett Dr. in West Harrison, NY come summer 2013. The firm, ranked by GlobeSt.com sister publication the National Law Journal as one of the top law firms in the country, has more than 300 attorneys and staff members.

The deal also signifies the firm’s continued commitment to staying close to its roots in the county. “In the middle of the recession that we are still going through, all New York City suburbs are suffering because companies are still contracting, but Westchester is extremely unique because it is probably the best location outside of New York for companies to settle within the New York region,” Robert P. Weisz, CEO of RPW Group, tells GlobeSt.com. “This deal is a confirmation of that. There are companies that will make a strong commitment.” Asking rents were in the low $30s per square foot, he added.