The party increased in strength following the 2003 local elections, gaining eight seats from the Labour Party in west and south Derwentside.[4] At the final election to Derwentside District Council in 2007, the party gained a further 10 seats, bringing its total to 24 and reducing Labour's majority to three.[5][6]
In March 2008, after feeling the Derwentside Independents could not offer a county-wide alternative to Labour, Councillor Bob Cook resigned from their ranks and joined the Liberal Democrats. He lost his seat at the subsequent local elections.[7] A rival Durham County Council Independent Group led by John Shuttleworth formed in 2008.[8]
Following the 2013 elections, the Derwentside Independents Party had eight councillors on the unitary Durham County Council.[7] Their representation had fallen to seven councilors by 2016. The party is part of one of two groups of independents on the county council, and forms part of the opposition to the ruling Labour Party.[8]
Its leader, councillor Watts Stelling, contested the 2005 general election in the constituency of North West Durham.