Curtis Thaxter

One Canal Plaza, Suite 1000, Portland, ME 04101
(207) 774-9000

James L. Costello, Attorney

Jim Costello’s  practice focuses on real estate and commercial law, utility law and regulatory matters. Jim combines his experience as a former accountant and as a senior energy, regulatory and real estate attorney to represent businesses on a wide range of legal concerns. Jim regularly advises utilities on Maine PUC regulation, utility rights of way, substation and corridor development and site acquisition, operating agreements, and aerial license agreements.  He assists businesses on office acquisition and leasing, business structuring, mergers and land acquisition, conservation easements and property tax matters. Jim regularly represents clients on state contract matters and award appeals.

Before joining the firm, Jim served as a law clerk to United States District Judge D. Brock Hornby.

Jim also previously practiced as a Certified Public Accountant with the firm KPMG Peat Marwick, working in both the tax and audit fields, with an emphasis in financial institution audits. He taught accounting at the University of Wisconsin, Madison, and a course entitled “Accounting for Lawyers” at the University of Maine School of Law.

Jim is active in the community and currently serves on the Yarmouth Economic Development Board. He is a Maine Bar Fellow and has served on a number of non-profit boards and local school volunteer activities, including a past board and executive committee member of the Maine Bar Foundation, Common Good Ventures,  Lift 360 and the Maine Children’s Museum.

Contact Info

  • 207.774.9000, ext. 210

Practice Areas

  • Energy, Utilities and Telecommunications
  • General Business, Corporate and Finance
  • Real Estate


  • J.D., summa cum laude, first in class—University of Maine School of Law
  • Editor—Maine Law Review
  • Faculty Scholastic Achievement Award
  • West Scholastic Achievement Award in Commercial Law
  • Law Review Comment Article: The Auditors Responsibility for Fraud Detection and Disclosure
  • Master of Accountancy—University of Wisconsin, Madison
  • B.S. Business Administration - Accounting—University of Maine

Bar Admissions and Memberships

  • Maine
  • U.S. District Court for the District of Maine
  • Maine State Bar Association

Representative Matters