CA AB602

Requires local agencies conducting impact fee nexus studies on or after January 1, 2022 to adopt the study before imposing associated development fees, identify existing and proposed service levels, and provide public hearing notice with at least 30 days' advance notice.

Mandates that nexus studies adopted after July 1, 2022 calculate housing development fees proportionately to square footage of proposed units, unless the agency makes specific findings explaining why square footage is not an appropriate metric and demonstrates alternative fee structures do not disproportionately burden smaller developments.

Requires cities and counties to post written fee schedules on their websites, maintain archives of impact fee nexus studies dating back to January 1, 2018, and request and publish total fees and exactions for each project upon certificate of occupancy or final inspection.

Directs the Department of Housing and Community Development to create an impact fee nexus study template by January 1, 2024 that includes a method for calculating housing feasibility at given fee levels.

Authorizes any member of the public, including development applicants, to submit evidence of non-compliance with the Mitigation Fee Act and requires local legislative bodies to consider such evidence and may adjust proposed fees accordingly.