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Napa County · Building on your lot

Solar panels and EV chargers in Napa County

Napa County's own rules on solar panels and EV chargers, with the code text for every value.

Ask about solar panels and EV chargers in Napa County See coverage

Each rule below links to the section of the Napa County Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Napa County's code says

Napa County code What Napa County's code adds
EV charger permit
  • Apply in person, by mail or electronically; a complete, checklist-compliant application is approved administratively with all required permits.
    Applies: Projects that comply with the EV charging station checklist.
    § 15.15.050 · code text
    For projects that comply with the electric vehicle charging station checklist, the applicant may submit the permit application and associated documentation to the county's building division by personal delivery, mail, or electronic submittal.
Solar permit process
  • Expedited review, electronic submittal allowed; complete applications meeting checklist and standard plan get a permit as soon as reasonably practicable.
    Applies: Small residential rooftop solar energy systems eligible for expedited review.
    § 15.14.100 · code text
    As soon as reasonably practicable, upon receipt of a complete application and all required supporting documentation that meets the requirements of the standard plan and checklist, the building official or designee shall issue a building permit or other nondiscretionary permit.
  • Electronic submittal is allowed; wet signatures or hard-copy signature pages are required.
    Applies: Small residential rooftop solar energy system permits.
    § 15.14.090 · code text
    Electronic submittal of the required permit application and documents shall be allowed for all small residential rooftop solar energy system permits pursuant to the electronic submittal procedures specified in the checklist of requirements referenced in subsection (A) of Section 15.14.090.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

Do I need a permit for solar panels or an EV charger in Napa County?

Napa County's code: Expedited review, electronic submittal allowed; complete applications meeting checklist and standard plan get a permit as soon as reasonably practicable. (Small residential rooftop solar energy systems eligible for expedited review.) (§ 15.14.100); Apply in person, by mail or electronically; a complete, checklist-compliant application is approved administratively with all required permits. (Projects that comply with the EV charging station checklist.) (§ 15.15.050).

General information, not legal advice.

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Napa County Municipal Code — full text