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Does a New Furnace or AC Need a Permit in California?

Yes, and here's how a permit protects you, from ECC testing to selling your home.

November 8, 2026

In California, replacing a furnace, air conditioner or heat pump needs a building permit. Some contractors offer to skip it to save time. Here's why that's a bad trade.

What the permit covers

  • Title 24. California's energy code sets efficiency rules for new and replacement systems, including duct sealing in many cases.
  • ECC (formerly HERS) testing. Some of those rules are checked by an independent rater who tests ducts, airflow and refrigerant charge. See why your installer can't be your tester.
  • A final inspection. The building department checks the gas, venting, electrical and installation.

Why it matters to you

  • Safety: gas lines, venting and wiring checked by someone besides the installer.
  • Performance: the testing catches leaky ducts and a wrong charge, which cost you every month.
  • Selling your home: unpermitted work can come up in a buyer's inspection and hold up a sale, or have to be permitted after the fact.
  • Rebates: many programs require a permit.

How we handle it

We pull the permit, schedule the inspection and arrange the independent ECC testing as part of the job. Quotes on new equipment are free: send us a message or call 805-965-6326.

Related

More tips on costs & permits.

Book a visit online

Pick a time for a service call, commercial refrigeration service, or a free estimate on a new furnace, air conditioner or heat pump. Your visit goes straight onto our schedule.

Schedule online

Or call 805-965-6326 (Mon–Fri 8:00 AM – 4:30 PM), or email service@crockerair.com.