Peter Irwin is a corporate partner and Chair of the firm’s Real Estate Group. He regularly advises clients on real estate acquisitions, dispositions, joint ventures, financings, restructurings and net lease transactions.

Mr. Irwin is ranked as a leading lawyer by Chambers USA (2021), where clients note “he is an experienced and capable lawyer who understands the client’s big-picture needs and provides thoughtful guidance”. Clients have described him as “smart and thoughtful, and an effective negotiator” and “one of the best transactional lawyers” they have ever worked with. He is said to be “very practical, very commercial and technically excellent,” with one client adding, “I always feel that he’s looking out for us and our interests.” He is also recommended in The Legal 500 US (2021), where clients have praised him as “formidable,” “incredibly knowledgeable” and a “skilled negotiator” whose “judgment, attention to detail, and attentiveness are unparalleled.”

Mr. Irwin is Chair of the firm’s Space Committee.  In that capacity, he has been responsible for the negotiation of the firm’s new 20-year lease to move its headquarters to The Spiral, a newly-constructed, state-of-the-art 65-story commercial tower at 66 Hudson Boulevard on the far west side of Manhattan in the Hudson Yards district, as well as the design and build-out of the interior space.

Mr. Irwin recently authored a chapter entitled “Real Property” in the Health Care Mergers and Acquisitions Answer Book (Practising Law Institute, 2020) and is a contributing author to the Debevoise Private Equity Report. He frequently speaks on a variety of real estate topics, including most recently at the New York State Bar Association’s Advanced Real Estate Topics 2017.

Mr. Irwin joined Debevoise in 1999 and became a partner in 2004. He received his B.S. from Cornell University in 1993 and his J.D. from St. John’s University School of Law in 1996. He was selected as a David Rockefeller Fellow for the class of 2012 by the Partnership for New York City. He is a member of the New York State Bar Association’s Real Property Law Section and a member of the Real Estate Board of New York.


  • St. John's University School of Law, 1996, J.D.
  • Cornell University, 1993, B.S.

Bar Admissions

  • New York