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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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, beginning 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 together market-driven insights, experience, and expertise. All of which allows 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. 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 are 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 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 grandchildren - as unique as the people who occupy them and 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 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

UMass Amherst Building and Construction Technology Program

551 N. Pleasant St.
Amherst , Massachusetts 01003
Phone: (413) 545-1860

The Building and Construction Technology (BCT) program at UMass Amherst prepares undergraduate and graduate students for successful careers in the building industry. Academic programs offered:
Building and Construction Technology
Sustainable Building Systems
Sustainable Building Construction
Professional Education courses

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

Uncarved Block, Inc.

78 Carter Rd.
Becket , Massachusetts 01223
Phone: (413) 464-2598

Uncarved Block is a design/build organization that combines historic building techniques with modern technology and an eye towards the artistic. We specialize in energy-efficient structures primarily built with local wood and stone.

Sectors: Single Family
Service Area: Connecticut, Maine, Massachusetts, New Hampshire, New York, Vermont
Professional Specialties: Building Envelope, Carpentry/Cabinetry, Construction Management, Deep Energy Retrofit, Design/Build, General Contractor, Net Zero, Passive House, Project Management, Timber Framing

  Industry Leader NESEA Member  

Unity Homes

6 Black Jack Crossing Rd.
Walpole , New Hampshire 03608
Phone: (603) 756-3600

Unity is dedicated to building better homes for more people. We use sophisticated technology and innovative prefabrication to streamline the process, minimize waste, and guarantee performance.

Sectors: Single Family
Service Area: Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, Vermont
Professional Specialties: Design/Build, Prefab/Modular

Valley Home Improvement

340 Riverside Dr.
Northampton , Massachusetts 01062
Phone: (413) 584-7522

Valley Home Improvement is a residential design/build remodeling company serving the Pioneer Valley for over three decades. We offer a single point of accountability throughout the design process. We help our clients solve both simple and complex design issues to create spaces of lasting beauty and comfort. We serve clients within a 30-mile radius of Northampton, MA.

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

Van Zelm Engineers

10 Talcott Notch Rd.
Farmington , Connecticut 06032
Phone: (860) 284-5064

Since 1930, van Zelm Heywood & Shadford has been devoted to the planning, study, and design of mechanical and electrical systems for the built environment. With projects that range in size from small studies to significant designs, we work for clients that include internationally renowned architects, major corporations, and world-renowned institutions. Long a proponent of sustainable design, van Zelm supports the growing global commitment to environmental conservation. We are proud to have contributed to the design of award-winning Living Building Challenge projects and LEED-certified buildings that have verified Gold and Platinum level energy conservation and efficiency.

Sectors: Institutional, Industrial
Service Area: Connecticut, Delaware, Maine, Massachusetts, New Jersey, New York, Pennsylvania, Rhode Island, Vermont
Professional Specialties: Certification/Commissioning, Electrical, Energy Modeling, Energy Monitoring, Engineering, Living Building Challenge, Mechanical Systems


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.