Bredell became involved in politics in the town of
Darling. He served as a municipal councillor prior to his advancement to the post of Deputy Mayor of Darling Transitional Council. Later on, he assumed the position of Mayor of the
Swartland Municipality. Bredell was elected to the
Western Cape Provincial Parliament in May 2009, and Premier
Helen Zille appointed him as Provincial Minister of Local Government, Environmental Affairs and Development Planning. In May 2019, newly elected Premier
Alan Winde kept Bredell in his position. Bredell is the longest serving Provincial Minister for any portfolio in the Western Cape Government. As Provincial Minister for Local Government, he has been uncompromising when it comes to ensuring the thirty municipalities in the province are well managed. In 2019 the province boasted with 25 unqualified audits. In addition twelve councils were awarded clean audit status by the Auditor General of South Africa, up from zero in 2009 when Bredell had been appointed to the position. In 2020, Bredell was elected as one of three deputy federal chairpersons of the DA. In October 2021,
Public Protector Busisiwe Mkhwebane found that Bredell had breached the Executive Code of Ethics over his failure to act against officials, who committed fraud and corruption at the
Oudtshoorn Local Municipality. Mkhwebane also found Premier Winde guilty of breaching the code. Bredell was re-elected for a second term as a deputy federal chairperson of the DA at the party's Federal Congress in 2023. Bredell was re-elected to the Provincial Parliament in the
2024 provincial election. Alan Winde named his new provincial cabinet on 13 June 2024 which saw Bredell remain as the Provincial Minister of Local Government, Environmental Affairs and Development Planning. Bredell stood down as a deputy federal chairperson at the
DA's Federal Congress in 2026. ==Controversies==