He became a county councillor for Maidstone Rural East in 1989. At the time he was chairman of a rail committee in the Weald of Kent preservation society, which had been protesting about what he then regarded as the destructive route of the Channel tunnel rail link. He became leader of the opposition Conservative group in 1993 and leader of the Council in 1997, retaining the post until 2005. While leader of Kent County Council, Bruce-Lockhart became a controversial figure on the national political stage for his introduction of a local version of the recently repealed anti-gay Section 28 legislation. In July 2004, having been vice-chairman for two years, Lord Bruce-Lockhart succeeded Sir Jeremy Beecham to become Chairman of the Local Government Association, following the Conservatives becoming the largest political group in the Association as the result of the local elections in May.