House Bill 4029 proposes significant amendments to the Hillsborough County Charter, primarily aimed at restructuring the Board of County Commissioners by increasing the number of commissioners from seven to nine, with a potential expansion to eleven if the county's population exceeds 2.5 million. The bill introduces a transition to single-member districts, requiring the board to establish these districts by October 1, 2027, based on the latest decennial census. It also modifies the election terms for commissioners, with those from odd-numbered districts serving two-year terms and those from even-numbered districts serving four-year terms to ensure staggered elections.

Furthermore, the bill mandates a referendum to be held on November 3, 2026, during the general election, allowing voters to decide on the proposed charter amendments. The ballot will include a question regarding the changes to the number of commissioners and the election process from single-member districts. If a majority of voters approve the amendment, it will take effect, along with the provisions related to the referendum and the act itself. Overall, the bill aims to enhance governance and ensure that it aligns with the needs of the county's growing population.