NESEA Business Member Directory

The NESEA Business Member Directory includes all organizations that are NESEA Business, Academic, and Non-Profit/Government Members.  Please let people know that you learned about their services from the directory.

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Graphite Studio

235 Triangle Street
Amherst , Massachusetts 01002
Phone: (413) 835-0008

A small design firm focusing on high-performance housing, deep energy retrofits, net zero homes, Passive new construction, and existing buildings in Western New England. Licensed architect (NH, VT, ME) and Passive House consultant.

Sectors: Single Family
Service Area: Maine, Massachusetts, New Hampshire, Vermont
Professional Specialties: Architecture/Design, Building Envelope, Deep Energy Retrofit, Net Zero, Passive House, Remodeling/Renovation

Green Insulation Group

10 Pullman St.
Worcester , Massachusetts 01606
Phone: (617) 975-3300

At Green Insulation Group, we stay true to our passion for sustainability by selling reclaimed and factory surplus materials at an affordable price. Find the largest volume and selection of eco-friendly rigid foam insulation of all types in our inventory.

Sectors: Commercial, Institutional, Industrial, Multifamily, Single Family
Service Area: Entire Northeast Region
Professional Specialties: Building Supply, Insulation

Greentech Renewables

2 Toelles Rd. Units 6, 7 & 8
Wallingford , Connecticut 06492
Phone: (203) 269-8064

CED Greentech East serves East of the Mississippi in the ever-expanding solar industry. We work closely with installers and have excellent service and extensive experience in the electrical and photovoltaic fields. Our goal is to meet your project requirements at a competitive price and to manage and deliver your system in a timely and professional manner. Our stock of materials and accessories will help complete your jobs without any holdups! Greentech personally handles daily deliveries throughout the region, ensuring that your complete system arrives on time and at no additional cost to you! We get low freight rates through our corporate account, and your order will be shipped out the same day!

Sectors: Institutional, Industrial, Single Family
Service Area: Entire Northeast Region
Professional Specialties: Building Supply, Community Planning, Education, Electrical, Energy Auditing, Incentives, Photovoltaics

Gregorio Sustainability

16 Dykeman Rd
Delmar , New York 12054
Phone: (301) 467-8058

Gregorio Sustainability offers a wide range of consulting services to clients in diverse industries, with deep expertise in commercial real estate and construction. Whether you are starting your first project or deepening the impact of an existing program, Gregorio Sustainability will develop and implement custom corporate responsibility strategies and sustainability solutions that add value to your organization's bottom line. With expertise in strategic planning and program development, project management, compliance and reporting, stakeholder engagement, and industry partnerships, our services will enhance your organization’s sustainability efforts to meet your goals.

Sectors: Commercial, Institutional, Industrial, Multifamily
WMBE: Women or BIPOC Owned
Service Area: New York
Professional Specialties: Certification/Commissioning, Consulting, Project Management

Hardwick Post & Beam

272 Fleming Rd., PO Box 225
Hardwick , Massachusetts 01037
Phone: (413) 477-6430

We are a company of craftspeople. For 33 years, we have designed and built beautiful, custom timber frame structures for clients in Massachusetts, New England, and the United States. A family company in its second generation of leadership, we have been employing a group of timber framers year-round for more than three decades and are committed to our people. We are very eager to work with architects and builders who are on the front line of cutting-edge energy sustainability and want to pair their products with the beauty and tradition of a timber frame.

Sectors: Commercial, Institutional, Single Family
Service Area: Connecticut, Massachusetts, New Hampshire, Vermont
Professional Specialties: Construction Management, Design/Build, Timber Framing

HELM Construction Solutions

139 Main St #602
Brattleboro , Vermont 05301
Phone: (802) 225-8933

HELM offers innovative business consulting, coaching, project management, and training services. Our experienced team members work with owners, designers, and builders to create high-performance buildings and businesses throughout North America. HELM's purpose is to revolutionize the construction industry, centering the triple bottom-line principles of planet, people, and prosperity to become a catalyst for climate justice.

Sectors: Commercial, Multifamily, Single Family
WMBE: Women or BIPOC Owned
Service Area: Entire Northeast Region
Professional Specialties: Construction Management, Consulting, Design/Build, Living Building Challenge, Net Zero, Passive House, Project Management

  Industry Leader NESEA Member  


374 Congress St., Ste. 400
Boston , Massachusetts 02210
Phone: (617) 338-5990

HGA is an interdisciplinary design firm committed to making a positive, lasting impact on our clients and communities through research-based, comprehensive solutions. We believe in the power of sustainable thinking to create efficient, equitable, and resilient spaces and have a long history of success embracing a holistic design approach. Human experience is at the core of any successful design solution; thus, our first design consideration is to create beloved buildings that contribute to our well-being, performance, and satisfaction. HGA’s work process incorporates options for creating lasting value that balances economic, social, and environmental impacts.

Sectors: Commercial, Institutional, Industrial, Multifamily
Service Area: Entire Northeast Region
Professional Specialties: Architecture/Design, Certification/Commissioning, Engineering, Landscape Design, Lighting, Research

  Industry Leader NESEA Member  

HMFH Architects, Inc.

130 Bishop Allen Dr., 4th FL.
Cambridge , Massachusetts 02139
Phone: (617) 492-2200

HMFH is an architecture firm committed to creating spaces that elevate users’ experience. While each of our projects is different in its response to context and program, we are unified by our approach, which is predicated on a belief that the best architecture builds community. We design spaces that connect people­—whether across a campus, in a civic building, public or private institution, living or working space.

Sectors: Commercial, Institutional, Multifamily
WMBE: Women or BIPOC Owned
Service Area: Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
Professional Specialties: Architecture/Design

  Midsize NESEA Business Member  

HomeWorks Energy

101 Station Landing
Medford , Massachusetts 02155
Phone: (781) 305-3319

We make it easy for homeowners to reduce their energy costs and carbon footprints. As a Mass Save® partner and the largest home performance contractor in Massachusetts, it’s our business to make your home – and wallet – greener.

Sectors: Multifamily, Single Family
Service Area: Connecticut, Massachusetts
Professional Specialties: Energy Auditing, HVAC, Incentives, Insulation

Horizon Homes

865 Spring St Westbrook, ME
Westbrook , Maine 04092
Phone: (207) 221-3221

At Horizon we are committed to helping Maine families enjoy healthy, comfortable, efficient homes. From air sealing and insulation to heat pumps with robust Efficiency Maine rebates, we have the experience and expertise to fix problem areas and make your dream a reality on your budget. At Horizon we have the experience to help you make your home as efficient, functional, and comfortable as possible. Reach out and one of our team leaders can assess your home and make a plan for bringing your dreams to reality.

Sectors: Single Family
Service Area:
Professional Specialties: HVAC, Indoor Air Quality, Insulation

  Industry Leader NESEA Member  

Huber Engineered Woods

10925 David Taylor Dr., Ste. 300
Charlotte , North Carolina 28262
Phone: (800) 933-9220

Huber Engineered Woods continually strives to create innovative products that suit their customers' needs. Each delivers outstanding performance, easy installation, and greater strength in single-family, multifamily, and light commercial projects. Huber's ZIP System Sheathing & Tape are structural wood panels with built-in protective barriers, eliminating the need for building wrap or felt and providing a continuous rigid moisture and air barrier that optimizes energy efficiency. Additionally, Huber's AdvanTech Subflooring product is proven to achieve a superior combination of strength and moisture resistance for subflooring that won't swell, cup, delaminate, or bounce even under the toughest conditions.

Sectors: Single Family
Service Area: Entire Northeast Region
Professional Specialties: Building Envelope, Building Supply, Insulation, Roofing

Hudson Valley Preservation Corp.

27 Maple St.
Kent , Connecticut 06757
Phone: (860) 592-0500

Formed in 1991, HVP has become one of the foremost companies for historic and modern renovations in the Hudson Valley and Connecticut. We also offer historic preservation consulting expertise in the areas of architectural history and assessment, preservation planning, restoration and rehabilitation design, and grant writing.

Sectors: Single Family
Service Area: Connecticut, New York
Professional Specialties: Construction Management, Consulting, Design/Build, Historic Restoration


The NESEA Business Member Directory is the premier referral resource for consumers and professionals looking for high-performance building and renewable energy professionals in the Northeast.

A listing in this directory results in increased visibility and referrals for our member organizations. The NESEA Business Member Directory is published online and in print (fall issue of BuildingEnergy magazine, circulation 3500). If you would like to be included in the directory, join NESEA today at one of our organization membership levels. Learn more.