About Gregory J. Kelley

Gregory concentrates the majority of his practice defending matters regarding architects and engineers, construction defect litigation and construction accidents. As well, he maintains a smaller portion of his practice in the defense of product liability claims. He splits his time between our King of Prussia, Pennsylvania, and Mount Laurel, New Jersey, offices.

Formerly a litigation specialist for a large casualty insurer in Pennsylvania and Delaware, Gregory was responsible for and developed experience in the evaluation, negotiation and defense strategy for catastrophic personal injury and property damage claims. He also served as an instructor for in-house claims professional seminars on topics of Case Evaluation & Negotiation and Insurance Coverage.

Prior to joining Marshall Dennehey in 2004, Gregory was with a defense firm where his practice involved defending personal injury and property damage matters, focusing on architect and engineer professional liability and construction claims, products, general, premises liability claims and insurance coverage matters.

In 1982, Gregory graduated from Villanova University with a Bachelor of Science degree. While working as an insurance claims professional, he earned his juris doctor from Widener University School of Law in 1992 and is admitted to practice in Pennsylvania and New Jersey.

Honors & awards

AV Preeminent by Martindale-Hubbell

The Best Lawyers in America, Litigation - Construction
2024-2026

The Best Lawyers in America, Construction Law
2026

Year joined

2004

Certification

OSHA 10-Hour Construction Certification

Results

Successfully Defended Architect in Construction Defect Matter

Architectural, Engineering & Construction Defect Litigation
March 7, 2025

We successfully defended an architect against a $7 million claim brought by a general contractor in connection with the renovation of a historic, city-block-sized building in Philadelphia. The contractor alleged design errors and sought additional damages under the Contractor and Subcontractor Payment Act, inflating its claim to $16 million. During contentious discovery, we exposed contradictions and falsehoods in the contractor’s testimony, leading to a partial summary judgment that dismissed the bulk of claims against our client.

Six-figure claim against lighting designer dismissed.

General Liability
August 13, 2021

We obtained dismissal of a six-figure claim in Philadelphia County via preliminary objections. The plaintiff homeowner sued a lighting designer for breach of contract, negligence for $23k in remediation costs, statutory remedies for treble damages and legal fees. The plaintiff alleged the lighting designer was a home improvement contractor who violated the Home Improvement Consumer Protection Act (HICPA) and Unfair Trade Practices and Consumer Protection Law. The plaintiff omitted pertinent facts from the complaint.

Thought Leadership

98 Marshall Dennehey Attorneys Recognized in the 2026 Editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America

August 20, 2025
Marshall Dennehey is proud to highlight the firm’s 98 attorneys who have been recognized in the 2026 editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America. Less than 6% of all practicing lawyers in the U.S.

Classes/Seminars Taught

Liability Concerns for Architects, Engineers and Construction Professionals: Pennsylvania Architects, Engineering & Construction Defect Issues, Marshall Dennehey Client Seminar, July 2015

 

Awards

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Services

Areas of Law

  • Other 4
    • Architectural / Engineering and Other Professional Liability
    • Construction Defect Litigation
    • Directors' & Officers' Liability
    • Products & General Liability

Practice Details

  • Firm Information
    Position
    Shareholder
    Firm Name
    Marshall Dennehey
  • Representative Cases & Transactions
    Cases
    Significant Representative Matters: Mediated a favorable settlement of less than $1M for an Architectural firm in a high rise to condominium conversion project wherein the Owner claimed damages in excess of $4.5M for delays
    cost increases caused by Architect errors & omissions
    negligent construction administration. The result was obtained at mediation in part due to use of document management
    search technology through which it was argued that the results showed that Owner had intentionally withheld or destroyed some pertinent documents that were likely favorable to Architect
    went against Owner's credibility.
    Mediated a favorable settlement for a large Architectural firm that involved construction of an addition to a county prison. The County claimed $4.6M in damages for delays
    cost increases, mostly due to negligent construction administration. The Architectural firm had formed a joint venture. Negotiations resulted in a $2M settlement, to which our client only contributed $300K as we were able to show that the substantial majority of the damages claimed pertained to the scope of activities performed by the joint venture partner.
    Successfully obtained summary judgment dismissal of an architect on the Statute of Repose in a deck collapse/personal injury action where the settlement dem
    was $2.5 million.
    Mediated a favorable settlement for an engineering firm in litigation that involved construction defect
    delay claims in multiple projects for a chain store owner. Owner's dem
    against the contractor
    three design professionals was $10, million. After two days of mediation, the case settled for an amount well in excess of $2 million, but our client contributed only $170,000.
    Mediated a favorable settlement for an architect in a design error/construction delay/ab
    onment claim wherein a $1.3 million claim was resolved for $400,000 without litigation
    without discovery expenses being incurred.
    Obtained a voluntary dismissal of an engineer in a catastrophic personal injury (quadriplegia) construction accident litigation in Philadelphia which has an exposure in excess of $15 million.
    Obtained dismissal of a township engineer in a double fatality construction accident litigation wherein two workers died while installing new sewer lines in a residential development. Township engineer was joined on theory that it was responsible for design
    oversight of construction of the excavated areas occupied by the workers when they were asphyxiated.
    Published Works: Stating a Claim for Negligent Misrepresentation for a Design Professional's Supply of Information, Defense Digest, Vol. 22, No. 2. June 2016
    Case Law Alerts , Regular Contributor, 2010-present
    The Federal Courts Require Complaints To State A Factually 'Plausible' Claim, And Factually 'Conceivable' (Speculative) Claims May Be Dismissed In The Pleadings Stage, Defense Digest, Vol. 14, No. 1, March 2008
    New Jersey: Parental Immunity For 'Negligent' Failure To Supervise Claim Calls For Case-By-Case Analysis Of Defense Strategy, Liability Evaluation And Coverage Determinations, Defense Digest, Vol. 12, No. 1, March 2006

Experience

  • Bar Admission & Memberships
    Admissions
    1993, Pennsylvania
    1993, New Jersey
    1993, U.S. District Court Eastern District of Pennsylvania
    1993, U.S. District Court District of New Jersey
    2000, U.S. Court of Appeals 3rd Circuit
    2000, U.S. District Court Middle District of Pennsylvania
    Memberships

    Associations & Memberships

    •Pennsylvania Bar Association
    •Philadelphia Bar Association

  • Education & Certifications
    Law School
    Widener University School of Law, Wilmington, Delaware
    Class of 1992
    J.D.
    Other Education
    Villanova University
    Class of 1982
    B.S.
    Business Administration

Contact Gregory J. Kelley

Share Holder at Marshall Dennehey
4.9
20 reviews

620 Freedom Business Center, Suite 300King Of Prussia, PA 19406U.S.A.

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Fax: (610) 354-8299

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Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    Gregory J. Kelley was admitted in 1993 to the State of New Jersey and Pennsylvania.
  • Is this attorney admitted to the bar in more than one state?
    Yes, Gregory J. Kelley is admitted to practice in New Jersey and Pennsylvania.
  • What law school did this attorney attend?
    Gregory J. Kelley attended Widener University School of Law, Wilmington, Delaware.
  • What year was this attorney's law firm established?
    Marshall Dennehey was established in 1962.