Whole-Home Rewiring
Leading Rewiring Electrical Company in Marin, Sonoma & Napa County
Many older homes contain outdated wiring that poses significant fire hazards, and many were not designed to support the power demands of our modern high-tech lifestyle.
Even newer homes may require electrical upgrades for remodeling projects or new appliances. Updating your system is crucial for ensuring safety and efficiency. A comprehensive rewire is often necessary to achieve safety, efficiency, and functionality in your home’s electrical system.
Whether you’re replacing outdated wiring, undertaking a major renovation, or striving to meet modern electrical standards, Ongaro & Sons offers expert whole-home rewiring services in and around Marin, Napa, and Sonoma counties, and all the neighboring the North Bay areas.
Our skilled electricians provide reliable solutions to enhance your home’s electrical infrastructure, ensuring peace of mind and optimal performance. Trust Ongaro & Sons to handle your rewiring needs with precision and care, call us today at 415-741-2820 or request services online.
All work is performed under active California contractors license #215233.
5 Signs Your Home Needs Rewiring
Not sure if your home needs a rewire? Here are five warning signs our electricians see most often in North Bay homes.
Frequent Circuit Breaker Trips or Blown Fuses
While an occasional trip is normal, if your circuit breakers are constantly tripping (or fuses blowing), it’s a strong indicator that your electrical system is overloaded or has underlying wiring issues. This often means your current wiring can’t handle the demands of modern appliances.
Flickering or Dimming Lights
Lights that flicker, dim, or buzz, especially when other appliances are in use, signal an inconsistent power supply. This could be due to loose connections, outdated wiring struggling with voltage drops, or overloaded circuits, all of which can be fire hazards.
Loose Outlets or Switches
If plugs wiggle excessively in outlets or constantly fall out, or if switches feel flimsy, it can indicate worn-out connections or wires that are no longer properly secured. This can lead to arcing and overheating.
Minor Electrical Shocks
Even a small tingle or shock when touching an appliance or plugging something into an outlet is a serious warning sign. It typically means there’s an issue with grounding or insulation, and the electrical current is finding an unintended path, which can be extremely dangerous.
Outdated Wiring Materials
If your home was built before the 1950s and hasn’t been rewired, it might have knob-and-tube wiring. Homes from the 1960s and ’70s might have aluminum wiring. Both are now considered hazardous due to insulation degradation, lack of grounding, or propensity for loose connections and overheating.
Comprehensive Whole-Home Rewire Services in Marin, Sonoma & Napa County
In today’s technology-driven world, your electrical system powers nearly everything you do. The professional electricians at Ongaro & Sons ensure your system is always reliable.
Enhance your home’s safety and efficiency with our professional and affordable home rewiring services. Our comprehensive whole-home rewire services include:
- Assessment and Whole-Home Rewire Planning: Our process begins with a thorough assessment of your current electrical system. We inspect the existing wiring, identify any potential hazards, and evaluate your home’s overall electrical load requirements. This assessment allows us to develop a detailed plan tailored to your needs.
- Complete Whole-Home Rewiring: We manage the comprehensive rewiring of your home, replacing outdated and unsafe wiring with new, code-compliant materials. This includes a crucial upgrade to your electrical panel, ensuring it meets current standards and can handle modern electrical demands. As part of this service, we install new circuits, outlets, and switches and ensure all wiring is properly grounded. Our skilled team works meticulously to minimize disruption to your home while upholding the highest safety and quality standards.
- Installation of New Electrical Components: In addition to rewiring, we also install new electrical components as needed. These can include modern outlets with USB ports, energy-efficient lighting fixtures, smart home systems, and more. We work with you to select the best products that meet your needs and enhance your home’s functionality.
- Electrical Repair and Maintenance Services: Ongaro & Sons doesn’t just stop at installation. We offer ongoing electrical repair and maintenance services to maintain your electrical system. Whether troubleshooting a faulty circuit, repairing damaged wiring, or conducting routine inspections, our team is always ready to assist.

Related Services & Energy-Efficiency Tax Credits
As a full-service electrical company, we offer various related services that can complement your whole-home rewire project. These include surge protection, whole-home generators, EV charging stations, and services for your other home systems, including HVAC installation and maintenance, plumbing services, and more. Our integrated approach ensures all your home’s systems work together seamlessly for maximum efficiency and comfort.
Homeowners who upgrade to qualifying electrical panels and other energy-efficient products may be eligible for tax credits. These credits can significantly offset the cost of improvements, making it a smart financial decision to invest in your home’s electrical infrastructure now. Let us help you navigate these incentives and maximize your savings while enhancing your home’s safety and functionality.

Schedule Your Whole-Home Rewiring Service
We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, San Rafael, Novato, and surrounding cities. Call us now at 415-741-2820 or book your appointment online for fast, reliable whole-home rewiring service you can trust.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Whole-Home Rewiring
Rewiring an occupied house is a sequencing problem as much as an electrical one.
Schedule Service →Knob and tube and early wiring assessed properly
Not every old circuit needs replacing, and not every insurer accepts the same evidence. We document what is there and what actually has to change.
Staged so the house stays livable
A whole-house rewire can be phased by floor or by circuit group so you are not without power in the kitchen for a fortnight. That planning is part of the estimate.
Plaster and finish work considered up front
The wire is often the cheaper half. Where the access holes go, and who closes them, belongs in the quote rather than in a surprise conversation later.
Grounding and bonding brought up to current code
Rewiring is the moment to correct grounding, bonding and the absence of a proper equipment ground. It is also what the inspector will look at.
C-10 licensed, permitted, inspected
Ongaro & Sons has held an active California contractors licence since 1963 and has worked in these counties since 1932.

Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Can I stay in my home during a rewire?
Often yes, depending on the home size and scope of work. We’ll work room by room to minimize inconvenience.
Do older homes need rewiring to add outlets or circuits?
Often, yes. Outdated wiring may not safely support additional load, making a partial or full rewire necessary for expansion.
How disruptive is a whole-home rewire?
It involves opening walls and ceilings, but we plan in phases to minimize daily impact and coordinate with homeowners for a smooth process.
When does a home need to be rewired?
Homes with outdated wiring like knob-and-tube or aluminum, frequent breaker trips, or signs of overheating should be evaluated for a full rewire.
Will a rewire improve safety?
Yes, it brings your electrical system up to code, reduces fire risk, and supports today’s energy needs.
Will rewiring my home increase resale value?
Yes, modern wiring increases home safety and can be a strong selling point, especially in older homes that might not meet current code standards.