Horn Williamson & Collins

Horn Williamson & Collins HORN WILLIAMSON, LLC is a law firm located in Center City Philadelphia that serves clients throughout the Mid-Atlantic region. Through Judge Gene D.

Representing homeowners, business owners, contractors, subcontractors, suppliers and community associations in construction claims, residential defects and commercial disputes. We focus our practice on all aspects of construction claims and commercial disputes. We represent business owners, developers, homeowners, general contractors, subcontractors, and material suppliers. Our firm provides clien

ts with the highest quality legal representation and is committed to excellence both in and out of the courtroom. With more than 85 years of combined legal experience in matters related to the construction industry, we are committed to helping our clients resolve their legal issues in a prompt and efficient manner. A Practical Approach to Resolving Legal Issues
We understand that litigation is not always in our clients’ best interest. We take a practical and straightforward approach to resolving legal issues to best serve our clients’ needs. We will listen to you, thoroughly evaluate your situation, and inform you of the risks of pursuing certain strategies. For Commercial Clients: A Fresh, Integrated Approach to Traditional Law Practice
Whether Horn Williamson attorneys are representing large and mid-sized commercial contractors, property owners, developers, business owners or employers, we are ready at every business milestone, and at every stage of litigation. Our attorneys assist clients with an array of construction matters including contract review and negotiation, scopes of work, change orders, delays, mechanics’ liens and payment disputes. Prior to construction, our attorneys draft and negotiate the full panoply of construction contracts from AIA, modified AIA, consensus to individualized contracts. During construction, we assist with project documentation and claims. Our Zoning—Land Use—Development attorneys advise clients on all facets of land use, zoning and development matters throughout the Delaware Valley, navigating clients through the development approval process. Cohen (Ret.), the firm offers alternative dispute resolution for Fee disputes, Intra-law firm difficulties and Inter-law firm disputes. The Firm offers construction accident defense, representation during OSHA investigations and other regulatory matters, as well as ERISA litigation. For Residential Clients: Analytical Approaches Based in Building Science and Engineering
Horn Williamson offers a unique and vigorous approach to protecting homeowners’ most valuable investment. The firm fills an unmet market need for experienced construction attorneys who represent families whose homes are damaged by water intrusion and building envelope defects. Combining analytical approaches based in building science and engineering, as well as years of experience representing the construction industry, Horn Williamson attorneys draw on unique skill sets to solve complex and thorny problems.

Professional development is not an afterthought at Horn Williamson & Collins—it's part of our culture.Our Managing Partn...
06/16/2026

Professional development is not an afterthought at Horn Williamson & Collins—it's part of our culture.

Our Managing Partner, Ryan Lockman, recently joined Elise Holtzman on The Lawyer's Edge podcast to discuss mentorship, attorney training and the importance of creating intentional learning opportunities for legal professionals.

The conversation highlights the firm's approach to developing attorneys and paralegals through structured training, internal education programs and Construction Defect University, our AI-assisted learning platform.

🎧 Listen to the episode: https://bit.ly/3SasU4l

Congratulations to our attorneys Kathryne Hemmings, Lindsey McElhatten and Megan Keefe Shannon on being selected to the ...
06/09/2026

Congratulations to our attorneys Kathryne Hemmings, Lindsey McElhatten and Megan Keefe Shannon on being selected to the 2026 Pennsylvania Rising Stars Super Lawyers list for construction litigation!

Being recognized at this stage of a legal career is a significant accomplishment and reflects the talent, dedication and professionalism they bring to homeowners, community associations and construction industry clients facing complex disputes. We are proud to see their contributions to our construction litigation practice recognized through this honor.

Congratulations to our partners recognized on the 2026 Pennsylvania and New Jersey Super Lawyers lists!  This year's sel...
06/08/2026

Congratulations to our partners recognized on the 2026 Pennsylvania and New Jersey Super Lawyers lists!

This year's selections reflect the depth of our construction litigation practice and our commitment to serving homeowners, community associations, contractors, subcontractors, suppliers, developers and business owners throughout the region. We are proud to see our partners’ dedication, experience and advocacy recognized by their peers.

Patrick A. Costello (PA)
Matthew H. Dempsey (PA)
Jennifer M. Horn (PA)
Ryan M. Lockman (PA)
Margaret M. Underwood (PA)
Janesa Urbano (NJ)

We’re excited to welcome Max Neuman to Horn Williamson & Collins' Summer Associate Program!Working alongside our attorne...
06/04/2026

We’re excited to welcome Max Neuman to Horn Williamson & Collins' Summer Associate Program!

Working alongside our attorneys on active litigation matters, Max is gaining hands-on experience and practical insight into the legal profession. Summer associates have opportunities to assist with trial preparation, attend appellate oral arguments, observe court proceedings and depositions, and participate in site visits that provide valuable perspective on our clients' matters.

Our Summer Associate Program is designed to provide meaningful, real-world experience and prepare future attorneys for life in private practice. We’re glad to have Max on board and look forward to supporting his professional growth this summer!

Last night, our Director of Operations, Jennifer Allegra, who serves as a Community Ambassador for ALS United Mid-Atlant...
06/03/2026

Last night, our Director of Operations, Jennifer Allegra, who serves as a Community Ambassador for ALS United Mid-Atlantic,joined her family at Citizens Bank Park for the Philadelphia Phillies' annual ALS Awareness Night.

Jennifer's father, who is living with ALS, was honored on the field before the game as part of Major League Baseball's league-wide effort to raise awareness for ALS and honor the legacy of Lou Gehrig. Alongside other individuals and families affected by the disease, he participated in a special pregame ceremony celebrating the strength, resilience and community behind the fight against ALS.

The event is part of the Phillies' longstanding partnership with ALS United Mid-Atlantic, which has helped raise awareness and support for those affected by ALS for decades. Together in the fight against ALS. 💙

Law360 Pulse recently featured our new partner, Janesa Urbano, and the diverse perspective she brings to Horn Williamson...
06/03/2026

Law360 Pulse recently featured our new partner, Janesa Urbano, and the diverse perspective she brings to Horn Williamson & Collins.

Drawing on experience in private practice, in-house counsel roles and the classroom as an adjunct professor at Temple University, Janesa advises construction and business clients on both litigation and transactional matters. Her practical, solutions-oriented approach helps clients address challenges, manage risk and achieve their business goals.

Read the full article below.

An attorney with more than 20 years of experience advising clients on construction litigation and transactional matters has moved her practice to Horn Williamson & Collins' Philadelphia office.

We’re pleased to welcome Alex Hubschmidt to Horn Williamson & Collins! We’re excited to have him on board and look forwa...
06/01/2026

We’re pleased to welcome Alex Hubschmidt to Horn Williamson & Collins! We’re excited to have him on board and look forward to the contributions he will make to our team and clients.

Alex is an associate in our Residential Construction Defect Group, representing homeowners and community associations in disputes involving defective construction, water intrusion, structural defects and other construction-related issues. https://bit.ly/3RZ5SgB

Please join us in welcoming Janesa Urbano to Horn Williamson & Collins!With more than 20 years of experience handling co...
05/28/2026

Please join us in welcoming Janesa Urbano to Horn Williamson & Collins!

With more than 20 years of experience handling complex commercial matters, Janesa strengthens the service and strategic counsel our firm provides clients across our commercial construction and real estate practices. Her addition further expands the firm’s capabilities in corporate transactions and contract negotiation and drafting.

We’re excited to have Janesa on board and look forward to the experience, insight and practical perspective she brings to our clients and team.

Another Horn Williamson & Collins CLE in the books! Today, construction partner Carter Williamson presented on mechanics...
05/28/2026

Another Horn Williamson & Collins CLE in the books!

Today, construction partner Carter Williamson presented on mechanics’ liens as part of our monthly in-house continuing education program. These sessions give our attorneys and paralegals the opportunity to stay sharp, share practical insights and continue building knowledge across our practice areas.

At Horn Williamson & Collins, professional development is part of our culture—and we’re proud to keep investing in our team through hands-on learning and collaboration.

Address

2005 Market Street, 32nd Floor
Philadelphia, PA
19103

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+12159873800

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