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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525 Massachusetts Ave., Ste. 204
Acton , Massachusetts 01720
Phone: (978) 263-6019

Thoughtforms Corporation specializes in building high-end custom homes and unique institutional buildings in eastern Massachusetts. Clients trust Thoughtforms to deliver custom quality in a transparent and informative way and to be a long term partner. The quality clients expect extends far beyond the level of finish and what can be seen in the here and now and includes the health and comfort of the indoor environment, energy use, durability, and technology among other elements.

Sectors: Institutional, Single Family
Service Area: Massachusetts, New Hampshire
Professional Specialties: Carpentry/Cabinetry, Construction Management, Consulting, Passive House, Remodeling/Renovation

Threshold Building Co.

PO Box 103
Shelburne Falls , Massachusetts 01370
Phone: (413) 522-7949

With dedication to craft, people, and place, Threshold Building Co. offers the highest quality finish work, timber frames, and high performance building to the community of Western Massachusetts and beyond. We lead a committed client, a forward-thinking design team, talented builders, and excellent subcontractors to complete projects with integrity and beauty. These projects combine form and function for the way people live today, and provide durability for the future. Threshold’s mission is to provide Western Massachusetts with comprehensive building services focusing on quality craftsmanship, sustainable building practices and clear customer communication.

Sectors: Single Family
Service Area: Massachusetts
Professional Specialties: Construction Management, Deep Energy Retrofit, Design/Build, Remodeling/Renovation, Timber Framing

Tim McCarthy Architect PC and New Leaf Modular Homes

83 Walkerville Rd.
North Bangor , New York 12966
Phone: (518) 343-3431

We provide architecture and construction management services. We live and work in the Lake Placid, Potsdam, Saranac Lake, Malone areas.

Sectors: Single Family
Service Area: New York
Professional Specialties: Architecture/Design, Construction Management, Design/Build, Net Zero, Prefab/Modular

TimberHomes Vermont

21 Fork Rd.
Montpelier , Vermont 05602
Phone: (802) 685-7974

We specialize in designing and building natural, soulful, resilient and energy efficient homes, timber frames, tree forms, scribe work, Vermont materials, net zero homes, timber framed solar pavilions, barns & outdoor structures, spiral stairs & compound roofs.

Sectors: Single Family
Service Area: Vermont
Professional Specialties: Construction Management, Design/Build, Net Zero, Timber Framing

  Midsize NESEA Business Member  


1 Main St.
Madison , Maine 04950
Phone: (855) 755-1359

TimberHP by GO Lab, Inc. is a privately held, Maine-based building products corporation, founded in 2017, to develop and manufacture wood fiber insulation for the residential and light commercial construction markets. Wood fiber board, batt, blown-in high-performance insulation products are vapor open, renewable, recyclable, nontoxic, carbon sequestering and, when manufactured here in America, cost competitive with other popular insulation products. In 2023, GO Lab will become one of the first companies to make wood fiber insulation in North America at its manufacturing facility in Madison, Maine.

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

Timeless Architecture

147 School St.
Milton , Massachusetts 02186
Phone: (617) 696-6448

Mr. MacLean is an architect, educator and licensed builder who began his career as a project manager with a number of large architectural firms in Boston before he started his own firm, Timeless Architecture in 1988. He has been promoting and teaching Green Design for 35 years, starting with the Boston Society for Architecture where he served as co-chair of the Committee on the Environment (COTE), a sub-committee that promotes sustainable design in the New England Region. He has taught and developed ongoing curricula at the Boston Architectural College, Sustainable Design Institute and Master’s program, as well as Wentworth Institute of Technology.

Sectors: Commercial, Institutional, Multifamily, Single Family
Service Area: Massachusetts
Professional Specialties: Architecture/Design, Design/Build, Historic Restoration, Net Zero, Remodeling/Renovation

  Industry Leader NESEA Member  

Tishman Speyer

45 Rockefeller Plz. 12th FL.
New York , New York 10111
Phone: (212) 715-0300

At Tishman Speyer, we convert opportunity into value through our expertise in every aspect of real estate. Our global professionals work collaboratively across disciplines and borders to bring togetheL market-driven insights, experience and expertise. All of which allow us to create properties of enduring value around the world.

Sectors: Commercial, Institutional, Industrial
Service Area: Entire Northeast Region
Professional Specialties: Construction Management, Development, Finance, Real Estate

Treehouse Design, Inc.

31 Poole's Ln.
Rockport , Massachusetts 01966
Phone: (978) 546-8302

Treehouse Design was founded in 1990 to provide architectural and construction management services for the needs of the vibrant, historically-rich coastal communities of Cape Ann. Currently, our company employs 20 individuals with a broad range of skills and experience, from architects and interior designers to construction managers and cabinet makers. Our office and workshop is located in Rockport, MA, where we take on a broad range of projects, from individual furniture commissions to multi-unit housing developments. Our primary focus, however, is single-family residential design and construction.

Sectors: Multifamily, Single Family
Service Area: Massachusetts
Professional Specialties: Architecture/Design, Carpentry/Cabinetry, Construction Management, Design/Build

  Midsize NESEA Business Member  

Trillium Architects, LLC

16 Bailey Ave.
Ridgefield , Connecticut 06877
Phone: (203) 438-4540

We are a woman-owned and operated full service architecture and design firm. At Trillium we design intelligent quality architecture and we endeavor to cultivate beauty and delight. We are trained in and highly aware of aesthetics and the human spatial experience. We believe in designing houses that you would be proud to leave your grand children - as unique as the people who occupy them; as beautiful as the natural world that surrounds them.

Sectors: Single Family
WMBE: Women or BIPOC Owned
Service Area: Connecticut, New York
Professional Specialties: Architecture/Design, Deep Energy Retrofit, Design/Build, Net Zero, Remodeling/Renovation

Truth Box, Inc.

460 Harris Ave., Unit 104
Providence , Rhode Island 02909
Phone: (401) 453-1300

We are a small architecture firm specializing in sustainable, energy-efficient design. We believe that high quality design and green building go hand-in-hand, and that higher performance does not necessarily mean higher costs. We work on a variety of project types - new single family homes, mill building renovations, new multi-family, and commercial buildings - and we particularly enjoy urban infill and re-purposing old buildings.

Sectors: Commercial, Industrial, Multifamily, Single Family
Service Area: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
Professional Specialties: Affordable Housing, Architecture/Design, Building Envelope, Design/Build, Development, Net Zero, Real Estate

Tufts University, Department of Civil and Environmental Engineering

200 College Ave., Anderson 204
Medford , Massachusetts 02155
Phone: 617-627-3211

Tufts Civil and Environmental Engineering (CEE) is focused on applying engineering and science to help society anticipate and respond to the emerging challenges of our changing world. Civil and Environmental engineers focus on natural and built systems and work at the intersection of infrastructure, the environment, and people.

Sectors: Commercial, Institutional, Industrial, Multifamily, Single Family
Service Area: Entire Northeast Region
Professional Specialties: Education, Engineering

Two Storey Building

89 Spectacle Hill Rd.
Bolton , Massachusetts 01740
Phone: (617) 438-0313

Two Storey Building, started by brothers Doug & Bill Storey in 2001 in Bolton, Massachusetts, is a custom builder of fine, energy efficient, high performance, healthy homes, and remodeling projects including whole house remodeling, kitchen, bathroom and basement remodeling, home additions, sunrooms, and decks. Two Storey Building built the first Silver LEED certified home in Massachusetts, many Energy Star Certified and Stretch Code certified homes and Doug Storey has received the Certified Green Professional(CGP) designation from the NAHB. Doug, Bill, Mat, and Camden are all Licensed Construction Supervisors and have taken OSHA 10 hour safety classes as well as the RRP class.

Sectors: Commercial, Single Family
Service Area: Massachusetts
Professional Specialties: Deep Energy Retrofit, Design/Build, Project Management, Remodeling/Renovation


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 as at one of our organization membership levels. Learn more.