About Cal Trevenen

During his extensive legal career, Cal has counseled and represented numerous clients in transactional real estate matters; land use (zoning & planning) cases; residential, commercial and industrial tax appeals; and estate planning and estate administration matters.

Before joining Spiro Harrison, Cal was for fifteen years managing partner of Montclair law firm Ashenfelter, Trembulak, McDonough, Golia & Trevenen LLP. Prior to that, he was a founding partner of the boutique tax appeal firm Garippa & Trevenen, where he represented numerous Fortune 500 clients in reducing their real estate tax obligations to local government entities.

Prior to commencing his practice of law in 1979, Cal was a mortgage and commercial lending officer with a major New Jersey banking institution. He has served as pro bono legal counsel and as a board member and trustee for numerous Montclair area non-profit organizations.

Cal served as an elected Town Council member and an appointed Planning Board member, and is a Vietnam-era veteran of the United States Army.


  • Seton Hall University School of Law, J.D. Law
  • Rutgers University, M.A. Public Administration
  • Colgate University, B.A. Political Science


  • State of New Jersey