Mountain View, CA Building Safety: Electrical Permits (2026)
Key Facts
- Adopted code
- 2023 NEC via 2025 Cal. Electrical Code
- One-family dwelling disconnect
- Min. 100A, 200A panel
- General installations
- Min. 60A disconnect, 100A panel
- Subdivisions (10+ homes)
- Follow Energy Code Sec. 110.10(e)
- Enforced by
- Building division, community development dept
Summary
Mountain View enforces the 2023 National Electrical Code as amended into the 2025 California Electrical Code, City Code Sec. 8.42.10, as the city's own Electrical Code. A one-family dwelling's service disconnect must be rated at least 100 amperes on a minimum 200-amp panel under the city's local amendment at Sec. 8.44.10.
The "National Electrical Code, 2023 Edition" in its entirety, as published by the National Fire Protection Association (NPFA), with the amendments adopted by the State Building Standards Commission in the California Code of Regulations (CCR) Title 24, Part 3, known as the "California Electrical Code, 2025 Edition," is hereby adopted by reference, with changes and modifications as hereinafter set forth, as defined in California Electrical Code Section 89.101.8, and incorporated fully and from the date on which this Chapter shall take effect, the provisions thereof shall be controlling within the limits of the city of mountain view as the "Electrical Code of the City of Mountain View." ... (C)One-Family Dwellings. For a one-family dwelling, the service disconnecting means shall have a rating of not less than 100 amperes, 3-wire accommodated on a minimum electric service panel size of 200 amperes.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 34 Update 4).
Full Breakdown
Article VI, Division 1 of the Building Code adopts the National Electrical Code, 2023 Edition, as published by the National Fire Protection Association, together with the state amendments in California Code of Regulations Title 24, Part 3, known as the California Electrical Code, 2025 Edition. Sec. 10 makes this combined text, with Mountain View's own further changes, 'controlling within the limits of the city of mountain view as the Electrical Code of the City of Mountain View,' and a copy is kept on file for public inspection in the building division of the community development department.
Division 2 layers local amendments onto the adopted code. Sec. 05 deletes the general administrative provisions in Article 89 of the state Electrical Code and substitutes the same administrative and permit chapter used for the Building Code under Article IV. Sec. 10(e)). Every other installation needs at least a 60-amp disconnect on a minimum 100-amp panel. A building or unit can be supplied with less power than its panel size allows, as long as it still carries the minimum disconnect rating this section and the Building Code require.
Violations & Fines
Electrical work performed under a permit that does not meet the adopted National Electrical Code, California Electrical Code, or Mountain View's local service-panel amendments in Sec. 8.44.10 will fail building division inspection and cannot be signed off toward a certificate of occupancy. The building official can also disconnect utility service under Sec. 8.28.55 where an electrical connection was made without required approval or presents a hazard to life or property.
Frequently Asked Questions
What electrical code does Mountain View enforce?
What size electrical panel does a Mountain View house need?
Can Mountain View disconnect my electrical service?
Sources & Official References
Other rules in Mountain View
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