The Cossingham Law Office, PC Legal Team

We stand for expertise and years of experience in a wide variety of legal disciplines. Read our profiles below to get to know us better.


CLO’s principal, Ken Cossingham, has been practicing law in the Merrimack Valley and Southern New Hampshire area for over 30 years. Each of CLO’s attorneys has many years of successful practice. Attorney Karen Guthrie has been practicing law for 20 years.   Therefore, when you retain the legal services of Cossingham Law Office, PC you will be represented by an attorney with years of experience, trained and successful in his/her field of practice.

Kenneth A Cossingham, Esq


Kenneth A Cossingham, Esq has  been practicing law in the Merrimack Valley and Southern New Hampshire for over 30 years. He earned his law degree from Suffolk University Law School in 1983, and was admitted as a member of the Massachusetts bar in 1983 and as a member of the New Hampshire bar in 1984. He earned his undergraduate degree from the University of New Hampshire in 1978. Ken has argued cases before both the Massachusetts Supreme Judicial Court, and the New Hampshire Supreme Court.


Ken practiced as an associate attorney in an Andover firm from 1983 to 1988, and founded Cossingham Law Office, PC (hereinafter CLO) in 1988. He has been principal of CLO since that time. 
CLO has consistently practiced in the areas of residential real estate, commercial real estate, Wills, Trusts and Estate Planning, Corporations and LLCs, business law, business transactions and business disputes. CLO also has attorneys who practice family law, divorce, custody, landlord tenant and short sales. CLO employs four attorneys, all of whom are licensed in both Massachusetts and New Hampshire. CLO’s staff also includes a title examiner, two paralegals, and legal assistants.


  • Suffolk University Law School, 1983.
  • Ken has been involved in the community as an Elder of his church, a member of the Andover Business Network, and youth sports.
  • During his matriculation at UNH, the Study Body President appointed Ken as Student Body Vice President for Academic Affairs.
  • In 1990, CLO was recognized by Fannie Mae at its annual national vendors’ conference as one of its top closing counsel nationally.  
Karen T. Guthrie, Esq. – Of Counsel
Karen T. Guthrie, Esq. has practiced law in Massachusetts for 20 years. She earned her law degree from New England School of Law (J.D. ’95) and her undergraduate degree from Cornell University (B.A. ’88). Attorney Guthrie has been a successful civil litigator since 1995 in contract, business, personal injury, real estate and family law matters. An experienced trial attorney, she has represented individuals, corporations and insurers as plaintiffs and defendants in the District, Superior, and Probate Courts throughout the state. She also has experience representing buyers, lenders and sellers in residential real estate transactions. In addition, Attorney Guthrie has had extensive mediation and arbitration training and experience in a wide range of practice areas. She is currently on the neutral panels of Massachusetts Dispute Resolution Services and New England Dispute Resolution Services in Boston, MA. She also volunteers as a mediator and conciliator for Lowell District Court. Since 2012, she has been a faculty member for MCLE - Deposition Practice in Boston, MA

Cossingham Law Office, PC

30 Massachusetts Avenue

Suite 404
North Andover, MA 01845

Phone: (978) 685-5686

Fax:       (978) 794-0985


Office Hours

We can be reached during the following hours:


Monday thru Friday

9am - 5pm

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