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MHR Development, LLC ("MHR")

MHR provides expertise to develop and improve buildings for economic and environmental sustainability.  We deliver comprehensive energy projects that advance financial and social responsibility for private and public sector clients. The firm was founded by Mark Hallett Robbins in 2003 and is based in New Canaan, CT.

Our multi-measure approach optimizes building performance and return on investment.  First, we maximize energy and water efficiency; then, we implement clean and renewable energy systems.  This reduces total system operating costs while enhancing occupant comfort and asset value. 


MHR's development expertise ranges from land-use approvals and environmental site remediation to historic conservation - with a holistic understanding of lifecycle costs and project economics. 


Comprehensive energy services include solar photovoltaic (PV), combined heat and power (CHP), geothermal and air-source heat pumps, LED architectural lighting, water and fuel conservation, demand management, indoor air quality (IAQ) improvements, weatherization, and process reengineering.


MHR received the Stamford 2030 Award: November 2018

What We Do

Green Building

Development services include project planning, entitlements, and construction management for new buildings and the adaptive reuse of existing facilities.

Renewable & Clean Energy

Design, implementation and commissioning of energy infrastructure projects as well as renewable energy upgrades for existing facilities.

Environmental Conservation

Total resource optimization through implementation of advanced controls, operational training, and process reengineering for improved manufacturing (PRIME).  

Financing & Incentives

Projects are structured for accelerated payback via Renewable Energy Credits (RECs), Property Assessed Clean Energy (PACE) financing, utility incentives, Power Purchase Agreements (PPAs), and the Inflation Reduction Act (IRA) credits.

Check out our Services to Learn More

How We Do It


MHR works with experts in the fields of architecture, energy engineering, finance and applicable law to deliver turnkey solutions from design to implementation. 


We employ a multi-measure approach to reduce total system operating costs and hedge against utility expenses.

Outstanding Results

Environmental Stewardship
& Cost Savings

Advanced efficiency technologies are implemented to yield long-term operational cost savings while reducing environmental impact.

Recognition & Awards

MHR projects have received LEED and EnergyStar certifications, PACEsetter Outstanding Project Award, 2030 District Change Makers Gold Award, and the Preservation Achievement Award. Projects have been featured on CNN and in The New York Times.

Mark Robbins

Mark H. Robbins

President, MHR Development

Mark H. Robbins, President of MHR Development, has over 20 years of construction and development experience in real estate and clean energy projects — including land acquisition, sustainable development, and regulatory compliance.  He has expertise in architecture, construction, historic preservation, energy efficiency, and ecological best practices.

Mark has served as a consulting partner to the Connecticut Green Bank (formerly known as Clean Energy Finance and Investment Authority) and is responsible for having advanced municipal adoption of property-assessed clean energy financing (C-PACE), and facilitating commercial sector energy projects.  He has developed commercial, multi-family and planned communities, including Connecticut’s first large-scale conservation community, Windermere on the Lake, home to the first LEED-certified residence of its size in New England.

Prior to focusing on clean energy, Mark managed real estate projects for investors and corporate clients.  He was Managing Director of National Realty and Development Corp. and President of NRDC Residential.  Before that, he was a Development Director at AvalonBay Communities, Inc., focusing on development of mixed-use/multi-family properties.  Prior to that, he was a partner at San Francisco-based Village Properties, opening and transferring to its New York City office.

Mark established the Energy Committee for the Connecticut Chapter of the United States Green Building Council (USGBC) and served on its Board of Directors.  He was a trustee of the New Canaan Nature Center and a member of New Canaan’s Long Range Planning Committee and its Conservation Commission.  He was also an advisor to SoundWaters and a member of its Sustainability and Renewable Energy Committee.

Mark holds a BA in Economics from Columbia University, an MS in Real Estate from Columbia School of Architecture, and has been a member of its adjunct faculty. 


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