Electrician in Sonoma County

What each building era does to the work

The county's housing arrived in waves, each leaving a different electrical system behind. On a site visit, the build era tells us more about scope than the address does.

Pre-1940 town cores. The old blocks in Petaluma, Healdsburg, Santa Rosa, Sonoma, Sebastopol and Cloverdale hold the oldest housing and are still the hardest to work in. We routinely find 60- and 100-amp services, cloth-insulated branch circuits, ungrounded two-prong receptacles, and knob-and-tube surviving in patches after a partial rewire decades ago. Plaster and lath over diagonal sheathing means fishing one new circuit takes hours where a modern house takes minutes, and the panel usually sits on an exterior wall fed by an overhead mast that gets replaced with it.

Postwar and mid-century tracts. These were built around a smaller electrical life: a range, a water heater, some lighting, and a kitchen sharing one or two receptacle circuits across every counter appliance. The wiring is usually serviceable; the circuit count is not. Fitting a modern kitchen, a home office and a garage charger onto a 100-amp panel with twelve spaces is a distribution problem, solved with a service upgrade plus a subpanel.

The 1960s and 1970s. Solid aluminum branch-circuit wiring shows up in this window and has to be addressed at every device with connectors listed for the purpose, not simply reterminated. We also still open panels from these years whose breaker lines were discontinued long ago. We do not condemn a panel on its label alone: we look at the bus, the breaker seats and any heat discoloration, then check whether replacement breakers can still be bought. When a panel needs one more circuit that is not for sale, the answer is obvious.

The 1980s and 1990s. By now 150- and 200-amp services were standard, so capacity is rarely the constraint. Space is. These panels are frequently full, half of it with tandems already, and often no listed tandem exists for the slots that remain. Grounding and bonding are usually intact, which shortens the job against a pre-war house.

2000s and newer. Modern services carry the load, but their assumptions aged fast. A panel sized in 2005 around a gas furnace, a gas water heater and one air conditioner is now asked to hold a vehicle charger, a heat pump, a heat pump water heater and sometimes an induction range. The wiring is fine; the math is not.

Rural and unincorporated parcels. Out here the scope grows: a well pump and pressure tank that must stay energized, a septic pump, a detached shop or barn on a buried feeder, a long service drop to a meter pedestal well away from the house, propane instead of gas. These addresses carry the most outage exposure, so backup power comes up on nearly every rural visit.

Symptoms, and what is failing behind them

A breaker that trips on the same circuit every time is telling you about load, not about the breaker. Trips scattered across circuits point at the panel, the main, or a loose neutral. Lights that dim when a compressor or well pump starts point at voltage drop, an undersized service, or a failing connection at the point of attachment. Warm cover plates, a buzzing panel, or a burnt-plastic smell mean something is arcing, and that circuit should come out of service.

Two-prong receptacles are not cause for alarm, but they mean there is no equipment grounding conductor behind the wall, which changes what may legally be installed there. Outdoor receptacles that will not reset and corroded disconnects are the coastal and river-valley version: water is entering something never sealed for this climate.

How we decide what a panel needs

We check the same four things on every call so the recommendation is not opinion.

Equipment condition. Bus condition, breaker seating, evidence of overheating, water intrusion, and whether parts still exist.

Capacity. Does the existing service carry what you have plus what you intend to add, under a real calculation rather than a rule of thumb?

The point of connection. Meter socket, service entrance conductors, mast or lateral, main bonding jumper, grounding electrode system. This one fails more often than homeowners expect, and it is what brings PG&E into the schedule.

The branch circuits behind it. Grounding, conductor type, and whether those circuits can accept the protection current code requires.

Fail on condition or the point of connection and you are replacing, whatever the capacity math says. Fail only on capacity and there are often cheaper answers than a full upgrade: a load management device, a dedicated subpanel, or sequencing two large loads so they cannot run together.

The load calculation settles most projects. It counts general lighting and receptacle load for the square footage, fixed appliances, the largest heating or cooling load and the new continuous loads, then applies the demand factors code allows. It also decides whether the utility is involved, because changing service size or replacing the meter socket means PG&E pulls and resets the meter, a step sequenced with inspection rather than assumed.

Permits, and who issues yours

Nearly all of this is permitted work. Where you live changes the process, not the requirement.

Unincorporated Sonoma County. Permit Sonoma allows several electrical projects to be applied for online without construction plans, including electrical work where a meter already exists and an "electrical service upgrade" at a "maximum of 200 amps including associated wiring" (Projects Eligible for Online Permitting). A larger service leaves that track, and new photovoltaic systems require plans regardless. There is also a defined route for a panel that is not safe to leave in service: the county accepts a C-10 licensed electrician's inspection and unsafe-conditions statement on an existing electric meter panel, requires that panel to be replaced or decommissioned within 90 days of permit issuance, and provides the PG&E letter at issuance (Permit Sonoma policy 9-3-8).

Standby generators outside city limits. The county draws a clean line: if the generator "connects to your electrical panel," a permit is required, and "if you plan to run your appliances directly off a portable generator (instead of through the electrical panel), you do not need a permit." The submittal is a single PDF with make and model, manufacturer's installation instructions, a site plan showing setbacks to property lines, combustibles and vegetation plus underground utility locations, and a single-line diagram covering wire size, transfer switch or interlock, and whether the unit is a separately derived system (Permit Requirements for Back-up Generators). That page also notes additional permits may be required from the air district, which is where the boundary above returns.

Vehicle chargers, anywhere in California. State law caps how long a jurisdiction may sit on a home charger application. Government Code 65850.7 requires every city and county to adopt "an expedited, streamlined permitting process for electric vehicle charging stations" and to "administratively approve an application to install electric vehicle charging stations through the issuance of a building permit or similar nondiscretionary permit." The timing is set by Government Code 65850.71, not by the section above it. For between one and twenty-five stations, the application is deemed complete five business days after submission and deemed approved twenty business days after that, unless the building official has already acted. Review is ministerial, not discretionary.

Code baselines. California's 2025 Building Energy Efficiency Standards took effect January 1, 2026 (California Energy Commission), and CALGreen, Title 24 Part 11, sets EV-ready provisions that are new-construction requirements. They impose no retrofit obligation on an existing house.

Take the air district rule at its word: it applies "only upon burn out of one's current equipment", with dates spread across 2027, 2029 and 2031 by appliance. No existing gas water heater is banned. What matters electrically is that a heat pump water heater generally needs a 240-volt circuit, which is how an air quality rule becomes a panel conversation, and why that conversation happens in Santa Rosa but not in Cloverdale.

Rebates and programs, and where they stand

Sonoma County's community choice provider is Sonoma Clean Power, which changes what exists here compared with Marin or Napa.

Vehicle charging. SCP runs a smart-charger enrollment program rather than an installation rebate. It pays a monthly bill credit plus a sign-up bonus for enrolling an eligible Wi-Fi connected smart charger, requires an active SCP customer who is the account holder or an authorized representative, and slows charging during grid stress, though the customer "can override an event anytime." Eligible devices are currently limited to WallBox and ChargePoint models, and SCP says it is "working hard to add more EV chargers to our program" (Sonoma Clean Power, EV Chargers). So the hardware you buy decides whether you can enroll: choose the charger before the circuit is designed.

Rate plans. Delivery is PG&E countywide, and the rate plan is a scope question rather than a billing afterthought. EV2-A keeps one meter and covers both home and vehicle use, with off-peak midnight to 3 p.m. daily; customers above 800% of baseline allowance over the last twelve months are not eligible. EV-B requires a second, dedicated meter and is not available with CARE, FERA or Medical Baseline (PG&E, Electric Vehicle Rate Plans). That second meter is physical work, designed in from the start. PG&E also lists E-ELEC, its Electric Home plan, aimed at households adding some combination of vehicle, battery and heat pump. The house does not have to be all-electric to qualify.

Water heating and heat pumps. Sonoma Clean Power runs the heat pump water heater rebate that reaches most of this county. The installation address has to be an SCP account and the equipment has to meet the performance requirements SCP publishes, with additional support for households enrolled in the CARE or FERA bill discount programs (Sonoma Clean Power, Water Heating). Levels and windows move, so the figure worth planning around is the one confirmed at quote time.

Backup power and outage exposure

PG&E operates a Public Safety Power Shutoff program under which it may turn off power for safety during severe weather. Exposure is uneven: hill and rural circuits carry more of it than flat urban blocks, and a house on a well feels an outage differently than a town house on municipal water, because when the power stops the water stops with it.

That leads to a sizing conversation. A standby generator with an automatic transfer switch fits when an interruption may last days and the loads include a well pump, a septic pump or refrigeration on a working property. We are a Certified Generac Generator installer, and the transfer switch detail is exactly what the county wants documented on the single-line diagram. Battery storage suits shorter interruptions and a defined set of critical circuits, and pairs naturally with solar in Sonoma County. What no property should have is a portable generator backfed through a receptacle, which endangers utility crews.

Maintenance that matters

Test GFCI and AFCI devices on a routine schedule and replace any that will not trip and reset. Check the date printed on smoke and carbon monoxide alarms, since sensors expire whether or not the unit still chirps. Have the panel opened and inspected periodically, particularly connections at the main and the neutral bar, where loosening shows up as heat before it shows up as failure. On the coast and along the river, check outdoor enclosures and gaskets yearly, because corrosion is the local failure mode. Exercise a standby generator and test transfer under load before the season you need it. Our maintenance program covers these checks alongside heating, cooling and plumbing.

Where we work in Sonoma County

We run the whole county from Petaluma: Santa Rosa, Rohnert Park and Cotati along the 101 corridor; Sonoma, Glen Ellen and Kenwood in the valley; Sebastopol, Graton and Forestville on the west side; Windsor, Healdsburg and Cloverdale up north; Guerneville and Monte Rio along the river; Bodega Bay and Jenner on the coast. The Sonoma County service area overview lists individual community pages.

How to choose an electrician for this work

Ask four things. Does the contractor hold a C-10 electrical license, and will they say so plainly? Will they run a load calculation before recommending a service size, or quote an upgrade sight unseen? Who pulls the permit, which office is it going to, and do they know the difference between an online-eligible county application and a city counter submittal? And what happens to the branch circuits behind the new panel, because a new enclosure in front of ungrounded or aluminum wiring solves less than it appears to.

Ongaro & Sons is Diamond Certified, holds a BBB A+ Rating, and has been a family business in the North Bay since 1932. We also hold C-20 HVAC and C-36 plumbing licenses, which matters when a project crosses trades: a panel change driven by new mechanical equipment stays on one schedule. See our electrical services in full.

What North Bay homeowners say

Two reviews from Sonoma County customers, unedited.