AT HORN WILLIAMSON, PRACTICING LAW IS ABOUT BEING AN ADVOCATE FOR THE RIGHTS OF OUR CLIENTS.

Homeowners | Commercial Owners | Community Associations Contractors | Subcontractors | Suppliers

Jennifer Horn, a Philadelphia construction and commercial litigation attorney, seated at a desk in a modern office wearing a royal blue blazer. She is participating in a video call on a tablet with Philadelphia’s City Hall visible through the window behind her.

going fearlessly up against some of the country’s biggest companies to right wrongs

HORN WILLIAMSON, LLC is a law firm located in Center City Philadelphia that serves clients throughout the Mid-Atlantic region. We focus our practice on all aspects of construction claims, construction defects, community association support, and commercial disputes.

Carter Williamson, a Philadelphia construction and commercial litigation attorney, standing confidently outdoors in front of a high-rise building. He is wearing a dark plaid suit and patterned tie, with a city skyline in the background.

experience navigating construction challenges

Our team has experience in all aspects of construction and the law. With more than 85 years of combined legal experience, our firm provides clients with the highest quality legal representation both in and out of the courtroom and we do whatever it takes to meet the needs of our clients.

Attorneys Carter Williamson and Jennifer Horn of Horn Williamson review building plans outside a residential construction site in Philadelphia. They stand in front of a row of townhomes, with scaffolding visible in the background.

proven track record

Our firm has repeatedly succeeded in obtaining favorable resolutions for hundreds of clients with construction defects impacting buildings and homes throughout Pennsylvania and the Mid-Atlantic region.
Two young girls wearing navy blue Girls on the Run t-shirts smile while running outdoors. The event promotes empowerment and physical activity for elementary and middle school-aged girls.

community advocates

We are a proud sponsor of organizations like Homeless Advocacy Project to support pro bono legal services for people experiencing homelessness, and Girls on the Run to empower girls to reach their potential.
Professional headshot of Barbara S. Mager, a Philadelphia construction and commercial litigation attorney. She is wearing a black blazer over a blush pink top and smiling slightly, posed in a modern office with large windows and conference chairs in the background.

collaborative work environment

Horn Williamson is a woman-owned law firm with a collaborative work environment that recognizes the importance of all team members while actively developing the next generation of lawyers.