Philadelphia is the founding city of Ballard Spahr and home to its largest office, with attorneys representing clients in litigation, business and transactions. Talk to Our Experienced Legal Team Today.Fill Out the Form Below or Call Our Firm at (215) 486-0123. Duane Morris corporate attorneys advise early-stage and mature companies on a wide variety of corporate and securities matters. Community Legal Services (CLS) provides free legal advice and representation to low income residents of Philadelphia. Get legal help and learn about issues. Are you looking for a Philadelphia area Attorney? Call our Philadelphia office at (800) 624-8888 or fill out our online Contact form for our free consultation. Driving Directions to Philadelphia Office: Our office is located on the corner of 16th and Market Street. From points north (New York, Northern New Jersey):.