CA AB2421

Requires local agencies to treat emergency standby generators at existing macro cell tower sites as a permitted use subject to administrative, nondiscretionary review through January 1, 2024.

Specifies that generators must be rated below 50 horsepower, compliant with air quality regulations, have double-wall storage tanks not exceeding 300 gallons, and be located within 100 feet of the macro cell tower structure.

Mandates local agencies approve or deny permit applications within 60 days of submission, with applications automatically deemed approved if not acted upon within that timeframe.

Allows applicants to seek property owner consent concurrently with permit applications but prohibits installation until landowner documentation is provided to the local agency.

Permits local agencies to charge permit fees to cover administrative costs and preserves their authority to revoke permits for violations of building, fire safety, and other applicable codes.