Mark is a member of the firm’s Environmental and Land Use Practice Group and is resident in the Portsmouth office. Combining more than 30 years of experience in environmental, land use and commercial real estate law, he works with clients to successfully manage environmental risk in the context of business operations, transfer and development of real estate, and commercial transactions. Mark has extensive experience advising clients on state and federal environmental compliance and enforcement issues, soil and groundwater remediation, Brownfields, Superfund, and water resources.

Since his graduation from law school, Mark has counseled responsible parties in the investigative, remedy selection, allocation, settlement, remedial action and litigation phases associated with environmental matters and has served as chairman of PRP groups at 3 multi-party Superfund sites. Mark was been instrumental in obtaining cost-saving innovative remedies and settlement terms for his clients.

At the intersection of environmental and real estate law, Mark works with developers, buyers, sellers and lenders in all aspects of the development and transfer of real estate, including contracting, zoning and planning board approvals, leasing, environmental due diligence, environmental site assessments, risk allocation and permitting.

Honors & Distinctions

Mark is listed in The Best Lawyers in America for Environmental Law and Land Use & Zoning Law and in New Hampshire Magazine's list of New Hampshire's Top Attorneys.  Named “Environmental Law Lawyer of the Year” for the Manchester, New Hampshire area by Best Lawyers in America ® for 2012.

Professional Activities

Member, American Bar Association and Section on Environment, Energy and Resources

Member, New Hampshire Bar Association

Fellow, New Hampshire Bar Foundation


Beliveau, Mark.  Institutional Controls in New Hampshire. Implementing Institutional Controls at Brownfields and Other Contaminated Sites, American Bar Association, Second Edition, May 2012. 

Beliveau, Mark. Environmental Permitting: The Role of Local Officials. New Hampshire Municipal Law Lecture Series, 2006.

Beliveau, Mark. Water, Wetlands and the Role of Local Government. New Hampshire Municipal Law Lecture Series, 2003.


Civic Activities

Member, Town of Lee, New Hampshire Planning Board, 1990 – 2001 and 2008 - present