Mariner Commercial Properties, Inc., based in Ardmore, Pennsylvania, is emerging as Philadelphia's homegrown developer of premier properties. Founded in 1996, it has developed a variety of buildings including adaptive re-use office/retail properties, and suburban office buildings. With the development of 1441 Chestnut, it embarks on a new and ambitious endeavor to build the finest residential building in Philadelphia's history. While Mariner has invested in and developed a varied assortment of properties ranging from retail to office to residential, it has stayed true to its mission of always building the very highest quality product in the market in which it competes.

Mariner is privately owned and was founded by and continues to be led by Tim Mahoney. Mr. Mahoney has more than 18 years of experience in commercial real estate brokerage and development, having held influential positions at such firms as Oliver Realty, Grubb & Ellis Company, The Binswanger Company and Seneca Roach Commercial Property Services, before starting Mahoney Realty Group in 1995, hisreal estate brokerage and services company also based in Ardmore.