Horn Williamson, LLC is a construction law firm that serves clients throughout the Mid-Atlantic region. The firm focuses on all aspects of construction law, zoning, and commercial disputes. Its attorneys regularly counsel project owners, developers, general contractors, subcontractors, and material suppliers.  With more than 85 years of combined legal experience in the construction industry, Horn Williamson’s attorneys have the knowledge and experience to assist its clients in reaching successful, prompt, and efficient resolution of their legal issues.

From contract negotiation to claims, Horn Williamson’s attorneys have been in the forefront of many of the most notable construction projects in the Philadelphia area for the past 25 years.  Horn Williamson takes a practical, straightforward, approach to resolving legal issues, while drawing on its experience in the fields of engineering; design; insurance; zoning and land use; and commercial and construction litigation.

Assisting clients with an array of construction matters, Horn Williamson’s attorneys review, draft, and negotiate contracts, as well as all related documents. They prosecute and defend claims for delay, payment, and mechanics’ liens. The firm also defends its clients in construction accident cases, and provides representation during OSHA investigations, citations, and OSHA litigation. Their attorneys have repeatedly been selected for inclusion in Best Lawyers of America® in the field of Construction Law, as well as being named to the Pennsylvania “Super Lawyer” list.

Jennifer M. Horn, Esq. is Founding Partner; Margaret (Peggy) M. Underwood, Esq. is Of Counsel; and Carter Williamson, Esq. is a Partner.