AZ SB1529

Prohibits municipalities and counties from approving building permits for residential dwelling units within Active Management Areas unless the applicant obtains a certificate of assured water supply or written commitment from a designated water provider and pays all applicable groundwater replenishment fees.

Requires building permit applicants for residential units in Active Management Areas to pay activation fees and replenishment reserve fees to the groundwater replenishment district before permit approval.

Exempts building permit applicants who applied for or received zoning entitlements on or before September 30, 2026 from the new water supply certification requirements.

Expands the Arizona Groundwater Replenishment District's authority to levy one-time activation fees on individual residential dwelling units enrolled on or after January 1, 2027, not just subdivisions.

Adds "residential dwelling unit" to statutory definitions, meaning any building or structure used as a home or residence by one or more persons maintaining a household, including mobile homes.