Kosar, Devin P.

Devin P. Kosar joined Rosenberg & Estis in 2008 and is a Member with the firm’s Litigation Department. Devin’s practice involves all areas of real estate litigation including complex commercial litigation, landlord/tenant law and construction law. Additionally, Devin also counsels and represents condominium boards in connection with condominium governance and operational matters.

Devin has extensive experience in all regulatory and administrative law matters before the New York City Office of Administrative Trials and Hearings, such as the Environmental Control Board, Department of Consumer Affairs and Department of Health as well as the New York City Criminal Court.

Devin received his bachelor’s degree from Boston University and his J.D. from St. John’s University School of Law. While at St. John’s, Devin was the External Competition Director for the Moot Court Honor Society and a Senior Staff Member of the St. John’s Journal of Legal Commentary. Kosar’s note “Payola - Can Pay-For-Play Be Practically Enforced?” was published in the Spring, 2008 Edition of the St. John’s Journal of Legal Commentary.

Areas Of Practice   

  • Commercial Lease Disputes
  • Administrative proceedings, including Office of Administrative Trial and Hearings, Environmental Control Board, and the Board of Standards and Appeals
  • Co-op/ Condo Disputes
  • Class Action Defense
  • Construction Disputes and Adjoining Access Issues
  • Landlord /Tenant Disputes, including Yellowstone Injunctions
  • Contract Disputes
  • Building Violation Resolution
  • Construction Agreements
  • Certificates of No Harassment

Bar Admissions   

  • New York, 2009


  • St. John's University School of Law
    • J.D. - 2008
    • Honors: External Competition Director, Moot Court Honor Society
    • Honors: Senior Staff Member, St. John's Journal of Legal Commentary
  • Boston University
    • B.A. - 2005

Published Works   

  • "Payola -- Can Pay-For-Play Be Practically Enforced?," St. John's Journal of Legal Commentary, Volume 23, Summer 2008

Professional Associations and Memberships   

  • American Bar Association
  • New York State Bar Association
Devin P. Kosar
Devin P. Kosar
  • Member