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.

Policy on Appropriate Use

To maintain the integrity of this valuable network, it is important to ensure that our member information is protected and used responsibly. Before accessing the membership directory, please review our policy on appropriate use.

Search Filters

Select any desired filters, then click Apply to see the results.

Check boxes to limit your search to specific sectors
Check boxes to limit your search to a specific states
Search for listings that include these words or a quoted phrase
Check boxes to limit your search to specific specialties

  Industry Leader NESEA Member  

South Mountain Company

PO Box 1260
West Tisbury , Massachusetts 02575
Phone: (508) 693-4850

South Mountain Company (SMCo) is an integrated architecture and engineering, building, interior, and solar company located in West Tisbury, MA (on the island of Martha’s Vineyard). Our staff of 40 includes architects, engineers, interior designers, carpenters, cabinetmakers, solar installers, and administrators - all rolled into one multi-disciplinary team. We are a triple-bottom-lined worker-owned cooperative and certified B-Corp. Our mission is to uplift our community and environment by designing and building for a just future.

Sectors: Commercial, Institutional, Multifamily, Single Family
Service Area: Massachusetts
Professional Specialties: Architecture/Design, Deep Energy Retrofit, Design/Build, Engineering, Net Zero, Photovoltaics

  Industry Leader NESEA Member  


260 North Elm St.
Westfield , Massachusetts 01085
Phone: (413) 564-5585

In addition to innovating small duct high-velocity systems, SpacePak is the industry leader in air-to-water heat pump technology since introducing the modern hydronic solution to the North American market in 2011. Since then, SpacePak has taken great pride in being the driving force behind this promising technology's adoption in helping accelerate our country’s shift towards a cleaner and greener future. Thanks to our parent company, Mestek, and its 75-year-long history as an expert and leader in hydronic heating and cooling, SpacePak has found itself uniquely qualified to provide industry professionals with the proper training, support, and equipment that an emerging market demands.

Sectors: Commercial, Institutional, Multifamily, Single Family
Service Area: Entire Northeast Region
Professional Specialties: HVAC, Mechanical Systems, Water Heating

Sparhawk Group

81 Bridge St., Ste. 107
Yarmouth , Maine 04096
Phone: (207) 251-0656

From offices in New York City and Portland, Maine, we have driven energy efficiency into over 25,000 units of multifamily buildings, commissioned $900+ million in new construction, and provided leadership in energy efficiency since 1990. Early in the company's history, Sparhawk Group began with pay-for-performance energy efficiency projects delivering 3.5 megawatts of electrical power conservation at industrial, institutional, commercial, and government buildings. These projects were commissioned to ensure savings, and thus, payments for performance were realized. This grounding in energy performance and commissioning drives our company vision to this day.

Sectors: Commercial, Institutional, Industrial, Multifamily
Service Area: Maine, Massachusetts, New Hampshire, New Jersey, New York
Professional Specialties: Certification/Commissioning, Consulting, Energy Auditing, Engineering, Mechanical Systems

STA Design, Inc.

308 Congress St.
Boston , Massachusetts 02210
Phone: (617) 426-1501

We have been exceeding expectations, on time and on budget, for 25 years. We design solutions that think beyond the boundaries and establish a sphere of culture for smart clients. Well-formed environments result from well-informed clients and design teams working together to integrate the social facts of the common environment. Clients need an established partner to protect their interests and deliver spaces that serve a social purpose. Remarkable spaces don’t just happen. We solve problems, initiate social progress, and humanize environments.

Sectors: Commercial, Institutional, Industrial, Multifamily
WMBE: Women or BIPOC Owned
Service Area: Massachusetts
Professional Specialties: Architecture/Design

Star Contracting Company

1773 Dorchester Ave.
Boston , Massachusetts 02124
Phone: (617) 823-3154

Star Contracting is a family-run general contracting firm with over 40 years of experience. Our company is focused on custom homes, multi-family residential construction, additions, and substantial home renovations. We look to Passive House and other performance-based building standards like Net-Zero Energy and the Pretty Good House standard as exemplary models for achieving high-quality buildings that provide long-term value for owners and address our energy and climate goals for the coming decades. In addition to our general contracting & building services, we offer pre-construction consulting, construction management, and home maintenance & care plans. Star Contracting serves clients throughout the Greater Boston area.

Sectors: Multifamily, Single Family
Service Area: Massachusetts
Professional Specialties: Construction Management, Consulting, General Contractor, Net Zero, Passive House, Remodeling/Renovation

Steele Kellogg AIA

3 Walnut St.
Madison , New Jersey 07940
Phone: (973) 377-5757

Steele Kellogg integrates a strong design ethic with rigorous technical & mechanical analysis. Strong design demands an attention to the architectural details that the occupant engages with daily, along with thoughtful conveniences that provide ease, comfort & contemplative space. The design must capture, where appropriate, the feel of the wider world, including views, natural light & seasonal cycles. Energy efficiency is front & center, referencing LEED & PHIUS. Our site evaluation for both solar & view opportunities is a critical starting off point regardless of rural, suburban, or urban contexts. We bring over 40 years of experience, including single & multi-family projects, clinics & hospitals, and urban greenhouse wellness projects.

Sectors: Commercial, Institutional, Multifamily, Single Family
Service Area: Entire Northeast Region
Professional Specialties: Architecture/Design, Building Envelope, Consulting, Passive House, Remodeling/Renovation

  Midsize NESEA Business Member  

Stephen Turner Inc.

317 Hope St.
Providence , Rhode Island 02906
Phone: (401) 273-1935

Stephen Turner is dedicated to providing comprehensive commissioning services. Commissioning is a quality process that verifies and documents that a completed project or existing building meets the owner’s needs and expectations. Our firm provides commissioning services in all forms – new building commissioning, renovation commissioning, retro-commissioning, ongoing commissioning of existing buildings, commissioning of system retrofits, and recommissioning for reopening.

Sectors: Commercial, Institutional, Multifamily
Service Area: Connecticut, Massachusetts, New Hampshire, Rhode Island
Professional Specialties: Certification/Commissioning, Consulting, Energy Auditing, Energy Modeling, Energy Monitoring

Stephens and Company, Inc.

61 Old South Road, PMB 119
Nantucket , Massachusetts 02554
Phone: (508) 325-5736

At Stephens and Company, we are committed to a culture of sustainable construction principles, integrating energy efficiency and industry-tested best practices across all disciplines of residential construction. Whether you are building a new home or renovating an existing building, we can help you make it a “fiscally environmental” home that performs at its maximum potential. We can help you understand and navigate state and town regulations, and we can help you take full advantage of all incentive programs available to you.

Sectors: Commercial, Single Family
Service Area: Massachusetts
Professional Specialties: Carpentry/Cabinetry, General Contractor, HERS Rater, Remodeling/Renovation

  Industry Leader NESEA Member  

Steven Winter Associates

307 7th Ave., Ste. 1701
New York , New York 10001
Phone: (212) 564-5800

Steven Winter Associates provides research, consulting, and advisory services to improve commercial, residential, and multifamily built environments for private and public sector clients. We specialize in energy, sustainability, and accessibility consulting, as well as certification, research and development, and compliance services. Our engineers and architects have led the way since 1972 in the development of best practices to achieve high-performance buildings. As a matter of course, we collaborate with our clients to produce the most cost-effective and innovative solutions.

Sectors: Commercial, Institutional, Multifamily, Single Family
Service Area: Entire Northeast Region
Professional Specialties: Architecture/Design, Certification/Commissioning, Community Planning, Consulting, Design/Build, Education, Energy Auditing, Engineering, HERS Rater, HVAC, Indoor Air Quality, Insulation, Net Zero, Passive House, Photovoltaics, Research

Steveworks, LLC

108 Cabot St.
Newton , Massachusetts 02458
Phone: (617) 201-0121

Steveworks is a family-owned residential remodeling contractor working in Newton, MA, and the surrounding area. Our company was founded in 2000 and is committed to quality, diversity, and sustainability. We consider energy performance, the carbon footprint of materials and resources, universal design principles, durability, functionality, and beauty in designing and executing projects our clients can enjoy for many years to come. We are proud to receive high marks both for the quality of our work and for the personality and integrity of our crew.

Sectors: Single Family
Service Area: Massachusetts
Professional Specialties: Building Envelope, Carpentry/Cabinetry, Deep Energy Retrofit, Design/Build, General Contractor, Remodeling/Renovation

Stiebel Eltron, Inc.

17 West St.
West Hatfield , Massachusetts 01088
Phone: (413) 247-3380

Stiebel Eltron is the world leader in advanced water heating technology. Founded in Germany in 1924 by Dr. Theodor Stiebel, the company is still family owned. The product line has grown to include whole house and point-of-use tankless electric water heaters, including the Tempra® Plus with German-patented Advanced Flow Control™, commercial/industrial three-phase water heaters, mini-tank and wall-mounted water heaters, air-to-water heat pump water heaters, plus small, quiet electric space heaters and contemporary, high efficiency touchless hand dryers. Stiebel Eltron is known worldwide for its engineering and manufacturing expertise and drive to develop innovative products with greater energy efficiency, convenience, and reliability.

Sectors: Commercial, Institutional, Industrial, Multifamily, Single Family
Service Area: Entire Northeast Region
Professional Specialties: Solar Thermal, Water Heating

Structure Design and Build

68 Cliftondale St.
Roslindale , Massachusetts 02131
Phone: (207) 347-0983

Structure was founded in 2008, by Peter Jackson Hussey, and has since evolved over time to a small design studio with a team that offers, in house custom cabinetry, millwork and furniture as well as design services and general contracting. We work in all dimensions and projects of all sizes both big and small: from architectural and building design, kitchen design for custom cabinetry, to millwork and furniture design. In addition to our design services, we offer build services such as general contracting & construction management, residential and commercial construction, and custom cabinetry, millwork, and handmade furniture. We love to travel when needed, often working with clients all over New England.

Sectors: Commercial, Multifamily, Single Family
Service Area: Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, Vermont
Professional Specialties: Carpentry/Cabinetry, Construction Management, Design/Build, General Contractor, 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 at one of our organization membership levels. Learn more.