Electrician in Windsor, CA
Who is the best electrician in Windsor? Judged on record rather than advertising, Ongaro & Sons: family run since 1932, Diamond Certified, holding a C-10 electrical license, and carrying 2,726 Google reviews at an average of 4.8 stars. We serve Windsor from our Petaluma headquarters, straight up Highway 101, and we run the load calculation before we quote the work.
On this page
Most pages about residential electrical work open with symptoms. In Windsor the better place to start is the permit counter, because the Town has drawn a line through the middle of this trade, and which side your project lands on changes both the equipment you should buy and the schedule you should expect.
The 200-amp line the Town of Windsor drew
Inside the town limits, electrical permits come from the Town of Windsor Building Division through its Permit Center. Addresses just outside that boundary, in unincorporated Sonoma County, go to Permit Sonoma instead. The distinction matters here because Windsor's edges are irregular, and a property on a road you think of as Windsor may not sit inside the incorporated town.
The line itself comes from the Town's online permitting system. Its own Building Division announcement named the qualifying jobs: "Online application and approval for the following over-the-counter permits is now available for the installation of solar systems, water heaters, furnaces, air conditioners, reroof projects, and electrical service panel upgrades of 200 amps or fewer." That platform, eTRAKiT, is still in use and has since been upgraded, with registered contractors now signing in under their state license number.
Read that list closely. A service upgrade at 200 amps or fewer is an over-the-counter transaction. Push past 200 amps, to a 320-amp meter-main or a 400-amp service, and the project leaves that lane for a review that takes longer and asks for more drawings. Same house, same electrician, different answer on timing, purely because of the number stamped on the main breaker.
The announcement also says who may use that lane: it "is offered only to California licensed contractors registered with the Town's Building Division." Homeowners are not shut out, since the Town publishes an Owner/Builder Declaration Form, but that route runs through the counter.
Vehicle charging follows a different rule, written in Sacramento. Government Code 65850.7 requires every California city and county to "adopt an ordinance... that creates an expedited, streamlined permitting process for electric vehicle charging stations," and to approve those applications "through the issuance of a building permit or similar nondiscretionary permit." Review is ministerial. The clock sits in the companion section, 65850.71, rather than in 65850.7. For one to twenty-five stations at a single site the clock is five business days to deemed complete, and ten above that number. A permit is still required; the law only caps how long anyone can sit on it.
Windsor publishes its own submittal checklist for charging stations, and it repays reading before you shop. It states that "The Building Division will conduct the plan review and inspection for EVCS installations," that Planning Division approval "is not required for EVCS installations unless the Building Official determines that the proposed EVCS will have a specific, adverse impact upon the public health or safety," and that Fire District review "is not required for EVCS installations unless the system includes a stationary storage battery system as defined in the CA Fire Code." That last clause catches people. Attach a home battery to a charger project and you have added a reviewing agency, which argues for settling the storage question at the start.
The checklist then puts the load calculation at the center and says plainly what happens when the numbers fail. It requires an Electrical Load Calculation Worksheet prepared under California Electrical Code Article 220, and its footnote reads: "If the existing service panel is smaller than the minimum required size of existing electrical services, then a new upgraded electrical service panel must be installed in order to handle the added electrical load from the proposed EVCS." It also asks whether the branch circuit conductor carries a continuous load of 125 percent of the equipment plus other non-continuous loads, per CEC 210.19. Windsor is telling you in writing that your charger job may be a panel job.
The same document offers relief. No site plan is needed for Level 1 or Level 2 equipment inside an existing one or two family structure such as a garage or carport, no electrical floor plan is needed for exterior work, and plan check deposits are not collected up front.
What that changes about the equipment you buy
With the load calculation in hand, the order of decisions inverts. Most households pick the charger, heat pump or water heater first and treat wiring as an afterthought. The working sequence is the reverse: measure the existing service, run the Article 220 numbers against every load you intend to add, then choose equipment that fits under that ceiling or raise the ceiling deliberately.
The Town's checklist makes the tradeoff concrete by tiering chargers: Level 1 at 110 or 120 volts on 15 or 20 amps, then Level 2 at 3.3 kilowatts on 20 or 30 amps, 6.6 kilowatts on 40 amps, 9.6 kilowatts on 50 amps, and 19.2 kilowatts on 100 amps. Reflexively asking for the fastest unit means asking for a hundred amps of continuous capacity, which on a 200-amp service already carrying air conditioning is often what pushes a simple job into a service rebuild. Households charging overnight rarely need the top tier, and choosing the middle one frequently keeps the project in the fast permit lane.
Load management pushes the other direction. Circuit-sharing controllers let two large appliances occupy the capacity of one, so a house can gain a charger without a larger service. Whether that fits depends on when the household actually uses power.
Charger brand matters here for a reason unrelated to electricity. Windsor's community choice electricity provider is Sonoma Clean Power, and SCP runs an EV charger enrollment program rather than an installation rebate: a recurring bill credit and a sign-up incentive for enrolling an eligible Wi-Fi connected smart charger. Eligibility is device specific, currently listing WallBox and ChargePoint models, with SCP noting that if your charger is not listed, "please check back as we are expanding our eligible device list." You must be an active SCP customer and the account holder or an authorized representative. SCP will "automatically reduce your charging speed during periods of grid stress," and participants "can override an event anytime." So in this town, the model you select decides whether an enrollment benefit exists at all.
Rate plan choice is likewise a scope question. PG&E's vehicle rate plans include EV2-A, which uses one meter and "applies to both your home energy and your vehicle's electricity use," with off-peak from midnight to 3 p.m. and peak from 4 to 9 p.m. EV-B "separates your vehicle's electricity costs from those of your home" but demands a second dedicated meter, which is physical work that has to be designed and permitted alongside the charger. And E-ELEC, the third, is for the household whose charger is arriving alongside a heat pump or a battery rather than alone.
Roger Hunter our service person from Ongaro was competent, thorough and personable. We had a number of electrical issues throughout the home. He listened to us, asked smart questions and completed each job.
Caren E.
Two Windsor housing eras, two different jobs
Windsor grew substantially from the 1980s onward, an unusual profile for northern Sonoma County. The older core near the Town Green, and scattered properties like the National Register listed Laughlin House on Aviation Boulevard, predate that growth by generations. The subdivisions that followed, Vintage Oaks and the Windsor Creek area among them, went up when 100 and 200 amp services were already standard.
The two eras produce different work. In newer housing the service is usually adequate and the task is a clean addition: a dedicated circuit, correctly sized breaker, tidy conduit, inspection. The constraint is physical rather than electrical, because a flush-mounted garage panel can be out of spaces while still having amps to spare. In pre-growth houses the service itself is the constraint, along with ungrounded two-wire circuits, undersized feeders to detached structures, and panel lines whose breakers are no longer manufactured, so one failure forces the whole replacement decision.
Summer is the third variable. Windsor runs hot like the rest of the inland Sonoma corridor, so cooling carries real load in a way it does not on the coast. If cooling is in your picture, the heat pump question and the panel question are one conversation.
What fails, and what it means
- Breakers tripping when the air conditioning starts while something else runs, which usually points to a shared circuit or undersized feeder rather than a defective breaker
- Receptacles or plates that feel warm, or show heat discoloration at the slots, indicating a loose termination or a failing device
- Lights dimming when a large motor starts, a sign of voltage drop across an undersized or long conductor run
- A breaker that will not reset, or resets and trips within seconds, which is a fault rather than a load problem
- GFCI or AFCI devices tripping repeatedly on outdoor or kitchen circuits after wet winters, often moisture at an exterior box
- Any buzz or hum audible at the panel door, which is never normal
- Interconnected smoke alarms chirping as a group, which is a circuit issue and not a battery issue
- Scorch marks, a burnt smell near the panel, or corrosion on the meter socket, all of which move to the front of the schedule
How the diagnosis gets done
A real electrical diagnosis is not a look at the panel door. We confirm service size at the meter and the main, verify what the panel is listed for, check terminations under load, look for heat at connections, confirm the grounding electrode system is intact, and measure voltage drop on the circuit that misbehaves. Intermittent complaints get tested under the conditions that produce them, since a circuit behaving in February says little about a July afternoon with the condenser running.
What you get back is a written finding separating a defect from predictable aging. We price the work before starting and pull permits in our name, and where capacity decides the recommendation we walk you through the worksheet.
The electrical work we run in Windsor
Service and panel upgrades are the backbone, and the Town's permit structure is why we treat them as design rather than replacement. Sizing correctly means projecting forward across cooling, a possible water heater conversion, a charger and sometimes a well pump, so you are not back for a second upgrade in three years. The full treatment is on our Windsor panel upgrade page.
Charger installation is the fastest growing part of the trade here, and everything above about worksheets, tiers, device eligibility and rate plans feeds it. We prepare the calculation, file the permit, run the circuit and commission the unit, and we tell you before purchase whether the model you like can enroll. Depth on that lives on our Windsor EV charger page.
Rewiring and circuit repair serves the older stock: replacing ungrounded circuits, correcting buried junctions, adding dedicated kitchen and laundry circuits, and putting detached garages on a properly sized feeder. It is patient work, staged so a household stays livable.
Standby power is a distinctly northern Sonoma County concern. This area lived through the 2019 Kincade Fire, and PG&E continues to run Public Safety Power Shutoffs in high fire risk weather. We are a Certified Generac Generator installer, and the design choice is usually whole-house automatic transfer versus a critical-loads subpanel carrying refrigeration, a well pump, one comfort zone and networking. The subpanel version costs less to run and often fits better.
Lighting and device work rounds it out: recessed retrofits, exterior circuits built to survive a wet winter, and panel-mounted surge protection. Because we run every trade, we also handle the circuit for a heat pump water heater, the interconnection for a solar and battery system, and the disconnects mechanical work requires. Business and multi-unit properties go through our commercial team.
From start to finish my experience with Ongaro was professional and pleasant. The office staff was friendly and prompt. My electrician, Roger, was polite and a great electrician. He did a really good job on the multiple items we had over a 7 hour day.
Lindsay N.
What drives the price
Service size comes first, since staying at or below 200 amps keeps the faster permit path while a larger service adds drawings and review. The utility side is next: an overhead drop and an underground lateral are different jobs, and trenching across finished landscape brings restoration work that has nothing to do with wire.
Panel location drives labor more than people expect. An exterior meter-main on an open wall is straightforward; a panel behind cabinetry or inside a converted space means demolition and patching. Distance sets the rest, because the run from panel to charger determines conduit, conductor size and how many framing members or stucco penetrations are involved.
Then there is what we find. Grounding electrode systems in older houses often need bringing current, ungrounded circuits discovered mid-project change scope, and any work touching the service waits on PG&E for a disconnect and reconnect. If spreading payments helps, see our financing options.
Incentives and program status
Sonoma Clean Power's charger enrollment, described above, is the Windsor-specific lever on the vehicle side, and it rewards the device rather than the installation.
Sonoma Clean Power runs a heat pump water heater rebate at a temporarily raised level, after which it reverts to CARE and FERA customers only. Those customers may receive a share of the project cost remaining once other rebates are applied. That belongs on an electrical page because panel capacity is usually the gating item on such a conversion, so the rebate calendar and the wiring schedule need to line up.
One air rule reaches into electrical planning. Windsor straddles the boundary between the Bay Area Air Quality Management District and the Northern Sonoma County Air Pollution Control District, so applicable rules depend on where in town a property sits, per Sonoma County's air quality districts page. BAAQMD's Regulation 9, Rule 6 sets zero-NOx requirements for residential water heaters, phased by unit size and appliance type across 2027 and 2031, and what those standards reach is the point of sale rather than the unit already bolted to a wall.
Nobody's working gas appliance is banned. The useful takeaway for an electrician is narrower: if a household expects to electrify water heating eventually, size the service for it while the panel is already open. A town like Cloverdale sits fully in the northern district, so the same discussion lands differently a few exits up the freeway.
California's 2025 Building Energy Efficiency Standards took effect January 1, 2026, per the California Energy Commission, setting heat pump water heaters as moved new single-family construction onto a single fuel baseline, with a heat pump prescriptively required for water heating and for space heating both. That baseline does not convert into a replacement mandate for an existing home.
Maintenance worth doing
Electrical systems fail slowly and then suddenly, and the slow part is inspectable. A periodic panel check looks for heat at terminations, confirms breaker torque against manufacturer specification, and verifies grounding and bonding survived whatever remodeling happened since. Test GFCI and AFCI devices seasonally with their own buttons.
Standby generators need the most attention because they sit idle. Confirm the exercise cycle runs, check the starting battery, verify the transfer switch transfers under load, and settle fuel supply well ahead of fire season. Make sure more than one person knows where the main disconnect is, and treat surge protection as maintenance rather than an upgrade. Our maintenance program covers electrical alongside the other trades.
Where in Windsor we work
We cover the whole town: the older core around the Town Green, the Vintage Oaks subdivisions, the Windsor Creek area, the streets off Old Redwood Highway, and the outer edges. Those edges deserve a note. Windsor supplies its own municipal water from local wells, but properties beyond the town system on private wells have a 240-volt pump that belongs in every load calculation and that stops during a shutoff unless something backs it up. On an unincorporated parcel the permit runs through Permit Sonoma, so we confirm jurisdiction first. We also work south into Santa Rosa and across Sonoma County.
How to choose an electrician for this
Start with the license class. This work belongs to a C-10 contractor, and that contractor should already be registered with the Town's Building Division if you want the online permit route. Ask directly.
Ask for the load calculation before the quote rather than after. Anyone quoting a charger or panel without Article 220 numbers is guessing, and the Town's own checklist says that calculation decides whether an upgrade is in scope. Ask whether the plan lands at or under 200 amps, since that answer sets your schedule.
Ask who files the permit and under whose name, who coordinates the utility disconnect if the service changes, and what the inspection plan is, since a permit never finaled becomes a problem at resale. On a charging project, get the specific model in writing, because enrollment eligibility depends on it.
We have worked the North Bay since 1932, we are Diamond Certified, we hold a BBB A+ Rating. Our reviews are public.
What North Bay homeowners say
Two reviews describing the kind of work covered above.
Related Windsor and Sonoma County pages
More depth on the work above: electrical panel upgrades in Windsor, EV charger installation in Windsor, heat pump systems in Windsor, water heaters in Windsor, and solar in Windsor. Nearby and countywide: electricians in Santa Rosa, electricians in Cloverdale, and electrical across Sonoma County. Every trade we run at your address is listed on the Windsor service page.
Book a Windsor electrician
Give us the address, the equipment you are weighing, and what the panel currently reads, and we will start from the calculation rather than a guess. Book online to schedule, or use our contact page if you would rather talk it through first.
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Read MoreWindsor electrical questions, answered
Who is the best electrician in Windsor, CA?
Ongaro & Sons has worked the North Bay since 1932 and is Diamond Certified, holding a C-10 electrical license with 2,726 Google reviews averaging 4.8 stars. What distinguishes the work locally is that we produce Article 220 numbers before recommending hardware, we know which projects qualify for the Town's over-the-counter lane, and permits are filed under our license.
Do I need a permit for a panel upgrade in Windsor?
Yes. Inside town limits it comes from the Building Division; on an unincorporated parcel it comes from Permit Sonoma. The Town lists service panel upgrades of 200 amps or fewer among the jobs a locally registered licensed contractor can file and get approved through the online system, which is the quickest route available.
How long does a charger permit take here?
State law sets the outer bound rather than local policy. Government Code 65850.7 makes review ministerial and, for filings covering one through twenty-five stations, treats the application as complete after five business days and approved twenty business days later, subject to exceptions such as the building official acting first or an appeal. Actual turnarounds are often shorter.
Does a home charger really need a load calculation?
It does. Windsor's charging station checklist requires an Electrical Load Calculation Worksheet under California Electrical Code Article 220 with the application, and says an existing service smaller than the calculated minimum has to be upgraded before equipment goes in. The form also asks whether the branch conductor is sized at 125 percent of the continuous load plus other loads.
Will a 100-amp service handle a heat pump and a car charger?
Sometimes, and only arithmetic answers it. A 100-amp service in a house already cooling through inland summers has less headroom than the same service on the coast. Load-management hardware lets two large appliances share capacity and can occasionally avoid a service increase, but that call should follow the worksheet rather than precede it.
What happens if I add a battery to the project?
The review widens. Windsor's checklist says Fire District plan review and inspection are not needed for a charging station unless the system includes a stationary storage battery as defined in the California Fire Code. Adding storage therefore brings another agency into the approval chain, which is a strong argument for deciding about batteries at the outset.
Does Sonoma Clean Power pay for charger installation?
Not the installation. SCP operates an enrollment program paying a recurring bill credit plus a sign-up incentive when you enroll an eligible Wi-Fi connected smart charger, currently listing WallBox and ChargePoint devices while working to expand that list. You have to be an active SCP customer and either the account holder or someone authorized on the account.
Which PG&E rate plan fits after an install?
It depends whether you want a second meter. EV2-A runs on your existing meter and covers household and vehicle usage together, with off-peak hours starting at midnight and running to 3 p.m. EV-B splits vehicle usage onto a dedicated second meter, which is extra physical work to design and permit. EV-B is not offered with CARE, FERA or Medical Baseline.
Why do breakers trip more in the summer?
Because inland heat makes cooling equipment run long and start often, and motor starting current exposes marginal circuits. A breaker that holds all winter and fails in July usually means a circuit carrying more than it was designed for, a loose termination that worsens as it heats, or a compressor pulling higher current as it ages. All three are testable.
Is a standby generator worth it around Windsor?
For many households here, yes, given the shutoff exposure that came into focus after 2019. The value depends on design. A whole-house automatic system covers everything and costs more to install and operate. A critical-loads subpanel handling refrigeration, a well pump, one comfort zone and networking usually delivers most of the benefit for less.
Do I have to replace my gas water heater because of the air rule?
No. The BAAQMD zero-NOx requirement for residential water heaters starts in 2027 with dates varying by unit size, applies to new and replacement units rather than working ones, and does not reach a working unit. Windsor also falls only partly inside that district.
Can I do the work myself in Windsor?
Homeowners can permit their own work through the Town's Owner/Builder Declaration process, though the online over-the-counter lane is reserved for California licensed contractors registered with the Building Division, so that path moves slower. Beyond paperwork, service work involves utility coordination and conductors that stay energized whatever the main breaker is doing.