Margaret M. Underwood

Attorney at Law


Margaret “Peggy” Underwood is a trial attorney with an active multi-state practice spanning all areas of private and public construction and commercial disputes. A significant portion of her practice includes construction accident defense litigation, OSHA/regulatory matters, and ERISA litigation.

Known for creative and effective strategies that avoid litigation and promptly resolve disputes, Peggy regularly counsels owners, developers, contractors, subcontractors, suppliers and designers during all phases of large to mid-size public and private construction projects. She assists clients with an array of issues including contract negotiations, OSHA investigations, change orders, delays, mechanics’ liens and payment disputes. When an amicable resolution is not possible, clients rely on Peggy’s vast experience litigating numerous matters in state and federal courts and before alternate dispute resolution panels.

Peggy was selected for inclusion in Best Lawyers of America® 2016 and 2017 in the field of Construction Law.  For more than a decade, she has been named by Law & Politics and Philadelphia Magazine to the Pennsylvania “Super Lawyer” list in the area of Construction.  Martindale-Hubbell® rates her AV® Preeminent.  In 2010, Martindale-Hubbell selected Peggy for the inaugural edition of the Bar Register of Preeminent Women Lawyers. In addition to her practice representing clients, Peggy serves as an arbitrator for the American Arbitration Association on the construction panel of its National Roster of Commercial Neutrals.

AV® Peer Review Rated “CV, BV and AV are registered certification marks of Reed Elsevier Properties Inc., used in accordance with the Martindale-Hubbell certification procedures, standards and policies.”

For the last ten years, Peggy Underwood has been named a Pennsylvania Super Lawyer by Law & Politics, appearing in Pennsylvania Super Lawyers Magazine. Each year, Pennsylvania Super Lawyers recognizes the top 5% of attorneys in Pennsylvania, as chosen by their peers and through independent research. The list recognizes attorneys in more than 60 practice areas, and each year, more than 800,000 attorneys nationwide participate in the survey and selection process.

Bar Admissions
  • Pennsylvania
  • New Jersey
Court Admissions
  • All State Courts of Pennsylvania
  • All State Courts of New Jersey
  • United States District Court for the Eastern District of Pennsylvania
  • United States District Court for the District of New Jersey
  • United States Court of Appeals for the Third Circuit

Villanova University School of Law, Villanova, PA (J.D. 1994, Moot Court; Winner Rabbi Seymour Siegel Memorial Moot Court Competition, Duke University School of Law 1994)

Temple University, Philadelphia, PA (A.B. 1974, cum laude)

Professional Associations

American Bar Association (Litigation Section; Forum Committee on the Construction Industry; Torts & Insurance Committee)

New Jersey Bar Association (Construction Committee)

Philadelphia Bar Association (Commercial Litigation Committee; State Civil Procedural Rules Committee)

National Association of Women in Construction
(President 2002-2004; Board Member 2002-2005; Philadelphia Chapter)

General Building Contractors Association (Affiliate Member; Safety Committee)

Building Contractors Association of South Jersey (Associate Member)