2025 California Electrical Code: what changed for homeowners

Since January 1, 2026, the electrical code in force in California is the 2025 California Electrical Code. It is Part 3 of the state building standards (Title 24), and it adopts the 2023 edition of the National Electrical Code with California changes. The 2022 edition no longer applies to new permits.

This page covers the part of that code a homeowner will notice. It is general information as of October 2026. Your city’s building department and inspector decide how it is applied.

How the code cycle works

California updates its building standards every three years. The state’s Building Standards Commission lists the 2025 Triennial Edition as published July 1, 2025, with an effective date of January 1, 2026. That cycle also includes the 2025 Energy Code, which is a separate book (Part 6).

Cities and counties adopt the state code by ordinance. A state law, AB 130, limits new state and local building standards that affect homes from October 2025 to June 2031, with exceptions for health and safety and home hardening. So expect the base rules to be the same across SoCal, with fewer new local add-ons than in past cycles. The electrical permits guide explains how the permit counter handles this.

What the code touches on an existing home

The code applies to new work. An older house is not ordered to rewire because the book changed. It matters when you:

• add or change a circuit, such as an EV charger or a heat pump
• replace a panel or service
• remodel a kitchen, bath or garage
• finish a basement or build an addition

If you only replace a light fixture, the older rules for that fixture still apply. If you open a wall to add a circuit, the new rules apply to that circuit.

The 2023 NEC changes homeowners meet most

These come from the 2023 NEC, now the base of the California edition. Section numbers are the NEC’s.

More GFCI protection

GFCI protection (the test and reset outlets) covers more places. In dwelling kitchens, readily accessible receptacles at 125 to 250 volts now need GFCI, not only the ones serving the countertop (210.8(A)). Basements are covered too, finished or not. Hardwired and cord-and-plug appliances rated 150 volts or less, such as dryers, microwaves and ranges, need GFCI protection (210.8(D)). Outdoor outlets on dwellings rated 150 volts or less to ground and 50 amps or less need it too (210.8(F)), including garages with floors at or below grade, with listed exceptions. See GFCI and AFCI protection for what the devices do.

Surge protection on every service

Surge protective devices became a dwelling-service requirement in the 2020 NEC. The 2023 edition makes the location rule apply to all services and service replacements (230.67(B)) and sets a minimum 10 kA rating (230.67(E)). In practice, a panel replacement now comes with a surge device at the service. That is a small add-on to a panel upgrade and a good reason to read a quote line by line. See surge protection.

Kitchen islands and 10-amp circuits

The required receptacle on a kitchen island or peninsula became optional in 210.52(C). The installer must still provide a raceway, conduit or cable system ending in a covered box for later use. Receptacles are barred from below the countertop, except dedicated USB devices. A new 10-amp branch circuit (210.18) is allowed for fixed lighting, dwelling exhaust fans and gas fireplaces, but not for general-use receptacles.

AFCI wording

AFCI (arc-fault) locations for dwelling units are now listed in 210.12(B), and the 10-amp circuit size was added. If you already have AFCI breakers in the bedrooms and living areas, that rule is not new to you.

What changed outside the electrical book

Two nearby rules often come up on the same job:

• Electric-ready new homes. Under the Energy Code, a newly built single-family home that installs gas or propane appliances must be wired ready for electric ones: a 240-volt, 30-amp circuit near the furnace, a 240-volt, 50-amp circuit near the cooktop, and a 240-volt, 30-amp circuit at the dryer, each with a reserved double-pole space in the main panel (Sections 150.0(n), (t), (u) and (v)). This does not apply to additions, alterations or all-electric new homes.
• EV charger permits. State law on permit timing for home chargers is explained in the AB 1236 guide.

What this means for your project

Project	Code point to expect
Panel replacement	Surge device at the service, new directory, load calculation
Kitchen remodel	GFCI on more outlets, island raceway or receptacle rule
New 240-volt circuit	Permit, inspection, the right breaker and wire size
Garage outlets	GFCI on garage and outdoor receptacles

The load calculation guide explains how an electrician checks that your panel can take a new circuit. Price ranges for common jobs are in the panel upgrade cost page.

What to ask your electrician

1. Which code edition does my city apply to this permit?
2. Does my city add anything to the state book?
3. Which parts of the job trigger GFCI, AFCI or surge protection?
4. Who pulls the permit, and who schedules the inspection?

California changes some NEC rules in its own edition, so use the current Part 3 text, or your inspector, to confirm any single section before you rely on it.