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Since its inception in 1984, CSG has been at the forefront of energy efficiency products, management, services and technologies. CSG has reached more than 2 million homes and aspires to reach millions more to build a clean energy economy.

2011aaa

  • CSG launches its proprietary software, EnergyMeasure, for tracking all aspects of residential energy efficiency programs.
  • New offices open in San Diego, CA; Lombard, IL; Bainbridge Island, WA.

2010aaa

  • CSG's plans for a more energy efficient future include a renewed dedication to the company's mission: to create solutions that reduce our impact on the planet and inspire greener living.

2009

  • CSG celebrates its 25th anniversary, having grown from a small, not-for-profit organization serving one state to a multi-million dollar organization serving more than 100 clients and reaching more than 2 million households.

2008

  • CSG continues its geographic expansion, establishing offices in Brooklyn, NY, Nashville, TN, Peoria, IL and Tucson, AZ.
  • The company employs nearly 400 people and revenues exceed $60 million.

2007

  • CSG develops and funds two BJ’s Wholesale Club solar installations that go on line in Connecticut.
  • CSG opens an office in the Midwest

2006

  • CSG opens its second office in Southern California, expanding services on the West coast. On the East coast, CSG opens office in New Jersey.
  • CSG certifies first LEED for Homes project for the U.S. Green Building Council.

2005

  • CSG develops programs to serve customers on Long Island, NY and opens office in Ronkonkoma.
  • CSG launches ClimateSAVE, a Green-e certified, renewable energy product.

2004

  • CSG opens office in Portland, Oregon to support the expansion of services in the Pacific Northwest.

2003

  • For the first time, local MA customers can support 100% renewable power through their utility company; GreenerWatts New England is offered to Massachusetts Electric and Nantucket Electric customers by CSG as a competitive product in the GreenUp program.
  • CSG formally establishes Clean Energy Markets Division to support expanding renewable energy market sector.

2002

  • Sun Power Electric becomes the first organization nationwide to trade "Green-e" certified green credits.
  • CSG partners with Massachusetts Interfaith Power & Light to retrofit churches and houses of worship statewide. CSG is awarded a "Leap of Faith Award."

2001

  • CSG implements the Home Performance with ENERGY STAR pilot program in New York State for the New York State Research and Development Authority (NYSERDA).

2000

  • CSG acquires Planergy, an energy services company based in Texas that runs "Solar Schools" and a commercial and industrial retrofit program.
  • CSG purchases ReGen, a "green-e" certified product from AllEnergy and begins marketing green power.
  • CSG partners with Efficiency Vermont, the nation's first energy efficient utility.

1999

  • CSG merges with MassSave (an organization formed in 1980 to provide residential conservation services in Massachusetts).
  • CSG moves headquarters from Boston to Westborough, MA.

1998

  • CSG establishes Sun Power Electric, the nation’s first all-solar power plant, for renewable energy sales and installations.
  • CSG installs the 1st solar power plant on BJ's Wholesale Club roof in North Dartmouth, MA – the 1st of 14 BJ's power plants in the Northeast over 9 years.

1997

  • Electric industry restructuring begins, with CSG's CEO playing a central role. CSG launches Marketing Services to support utility programs.

1995

  • CSG awarded $500,000 grant to introduce the Environmental Protection Agency's ENERGY STAR® Homes program in New England.

1992

  • CSG opens Wisconsin office, signifying service delivery beyond New England.

1990

  • CSG develops new residential construction program, Energy Crafted Homes, for New England utilities.

1989

  • CSG established as leader in residential demand-side management programs in New England.

1987

  • CSG helps lead demand-side regulatory and program development.

1986

  • CSG launches home performance service for customers of Massachusetts Electric (now National Grid).

1984

  • Conservation Services Group is founded in Boston (formerly known as The Community Energy Partnership).
  • CSG delivers the first energy audit for Boston Edison (now NSTAR).
  • CSG has one office and one employee. End-of-the year revenue is $100,000.
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