Yes. San Joaquin County requires permits for residential mechanical work (including HVAC change-outs). Permit applications are handled by the Community Development Department’s Building Division. California Energy Code (Title 24, Part 6) also applies to HVAC efficiency, controls, and duct sealing/verifications.
- San Joaquin County — Building Division (permits & inspections) :contentReference[oaicite:0]{index=0}
- County Online Permitting Portal :contentReference[oaicite:1]{index=1}
- California Energy Commission — Building Energy Efficiency Standards (Title 24) :contentReference[oaicite:2]{index=2}


















