Creates the County Design-Build Authorization Division in the Counties Code. Provides that a county may enter into design-build contracts. Includes scope and performance criteria for design-build contracts, a two-phase procedure for selection of contracts, requirements for submission of proposals, procedures for awarding contracts, and requirements of reports and evaluation of contracts. Provides that, if the total overall cost of a project is estimated to be less than $12,000,000, the county may combine the two-phase procedure for selection into one phase. Effective January 1, 2023.