South Mountain Company
West Tisbury, Massachusetts, United States
About
Founded in 1975, South Mountain Company is a cooperative headquartered in West Tisbury, United States with approximately 51-200 employees specializing in Solar.
South Mountain Company is a worker-owned cooperative based on Martha's Vineyard, Massachusetts, offering architecture, construction, interior design, and solar energy services. Founded in 1975, the company provides end-to-end solar energy planning and installation alongside custom home design and construction. The firm is deeply committed to sustainability, affordable housing development, and community engagement. Operating with a triple bottom line framework (people, planet, profit), the company builds high-performance, energy-efficient homes and commercial spaces designed to last generations. South Mountain is certified as a B Corporation and has been consistently ranked in the top five B Corps globally since 2008. The company specializes in residential solar PV installation, architectural design, custom cabinetry, interior design, and institutional collaboration projects.
Headquarters
Founded
Employees
Company type
Focus areas
Products & services
Business models
Value chain
Service areas (1)
Martha's Vineyard
End-to-end solar energy planning and installation services; architectural design and construction; affordable housing development; community engagement and institutional collaboration.
Locations
Headquarters
Red Arrow Road 15, 02575, West Tisbury, Massachusetts, United States
Operating locations (1)
- Post Office Box 1260, West Tisbury, Massachusetts, United States
Service regions
Projects
7Island Cohousing
An innovative 16-house neighborhood with solar systems developed on fifty acres in West Tisbury as a new South Mountain headquarters and community cohousing project.
West Tisbury Pocket Neighborhood
A pocket neighborhood of 8 single-family eco-friendly houses within a 3.5-acre building envelope on 8 acres. Houses designed with high performance building standards and LEED platinum certification, approaching net-zero energy with solar electric systems funded by Cape Light Compact.
Polly Hill Arboretum Solar Installation
One of three solar installations at Polly Hill Arboretum, an array that helps protect the nonprofit from rising utility costs while supporting its environmental goals.
MV Shipyard Solar Installation
Solar panels installed on MV Shipyard's Vineyard Haven campus. The system was tested to withstand environmental conditions including seagulls dropping clams.
Vineyard Gardens Solar Installation
Solar system installation with daily monitoring for a local business owner prioritizing local service availability.
Edgarton Historic District Solar Project
Solar installation approved by the Edgartown Historic District Commission, utilizing interior conduit and all-black panels to meet historic preservation requirements.
Affordable Housing Apartments
Four apartments completed in partnership with Dukes County Regional Housing Authority and the Marthas Vineyard Land Bank.
Credentials & affiliations
Industry memberships
Partnerships
Island Housing Trust, Cape Light Compact, Dukes County Regional Housing Authority, Marthas Vineyard Land Bank, Wampanoag Tribe of Gay Head, Polly Hill Arboretum
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