NESEA Business Member Directory

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 based in Rockport, MA, where we take on a variety of residential projects. Our core focus is the design and construction of custom single-family homes, with a strong emphasis on sustainability, climate resilience, and enduring craftsmanship. We’re committed to building homes that are not only beautiful and functional, but also responsive to their environment and built to last

We are a woman-owned and operated full-service, 12 person architecture firm. As of 2024 we are also a Co-operative. At Trillium, we design intelligent, highly energy efficient and sustainable architecture and endeavor to cultivate beauty and delight. We are trained in - and keep apprised of - cutting edge building enclosure deign, ventilation, carbon and energy. 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.
We also have a branch company called SEED Homes that specializes in small Net Zero Modular homes and we are currently working on developing affordable and sustainable multi family housing.

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.

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.

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.

The Mission of the School of Forest Resources is to provide excellence in education, research, and public service that promotes the understanding, efficient use, and sustainable management of forest resources for the well-being of the people of Maine, the United States, and the World. The Sustainable Materials and Technology program exists as a response to societal demand to move away from fossil fuels; renewable and sustainable resources are increasingly being used to create products ranging from construction and paper to packaging, composites, electronics, textiles, plastics, and bioenergy.

The US Heat Pump Summit is a comprehensive event for contracting firm owners and their teams. The Summit brings together behind the scenes business lessons from top contractors with the best technical trainers in the industry, all in a track based program to maximize your organization's value from attending the event. Reaching beyond typical training, the Summit hosts contractor-centered presentations and conversations with regulators, rebate providers and implementers, energy industry experts, members of the private equity investment community, and more. Summit attendees and sponsors consistently highlight the high quality of speakers and fellow attendees as a reason they're making this event a must attend each year.

We thrive on solving complex urban problems intelligently and pragmatically. From theoretical issues that frame policy to the practical implementation of architectural commissions, we develop a rigorous, research-based approach to finding the best answers. Our work yields fresh ways to think about how we develop and build our cities, presented with useful, compelling clarity (it’s why we’re called Utile).

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

As a Massachusetts Home Performance Contractor, Valley Home Insulation delivers residential insulation and weatherization services to homes across Massachusetts. We strive to understand our customers' needs better and deliver high-quality work. Our goal is to help our customers achieve long-term utility cost savings while making their homes healthier and more comfortable.

Since 1930, van Zelm Heywood & Shadford has been devoted to planning, studying, and designing mechanical and electrical systems for the built environment. With projects ranging in size from small studies to significant designs, we work for clients, including 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.

VEIC is an organization on a mission to generate the energy solutions the world needs. For over 35 years, VEIC has worked with governments, utilities, foundations, and businesses across North America to develop and deploy clean-energy services that provide immediate and lasting change. VEIC has expertise in energy efficiency, building decarbonization, transportation electrification, and demand management for a clean and flexible grid. VEIC is nationally recognized for programs and pilots that optimize energy use and reduce energy burdens for low-income customers. In addition to our consulting business, VEIC administers three sustainable energy programs: Efficiency Vermont, Efficiency Smart, and the DC Sustainable Energy Utility.