The wind energy cooperative was established in 2004 and has more than 2,000 members. The wind farm is intended to help to reduce dependence on fossil fuels whose emissions are considered to contribute to climate change. In 2007 Westmill Wind Farm Co-operative received a Schumacher Award.
Westmill Wind Farm was promoted by Energy4All, a co-operative founded by Baywind Energy Co-operative, which is a pioneer of co-operative wind energy in the UK.