As of late September 2026, the first cool nights are on their way to Riverside, and this is when I start thinking about the furnace and the tired AC in my ranch house. For years my habit with a swap was simple: take the quote, let the crew haul the old unit out, and never once ask about a permit. The sticker on the new equipment felt like proof enough. A permit looked like a fee and a wait, nothing more.
The city sees it differently. The City of Riverside’s homeowner information sheet for HVAC replacements lists an HVAC changeout among the projects that require a permit. And the Contractors State License Board checklist that Riverside Public Utilities posts for its customers has a line that reads like it was written for my old habit: “Beware of any contractor that offers a lower price to install a unit without a permit; having a permit ensures work will be inspected.”
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What the California Energy Commission says
The California Energy Commission, which writes the state’s energy code, answers the permit question in its own guidance on single-family HVAC work: “Installation of a space conditioning appliance (other than a plug-in room appliance) requires a building permit.” The only exception it names is a plug-in room appliance…