Replace century-old wiring. Local electricians in Ontario with upfront pricing, same-day appointments and 24/7 emergency response.
Searching for knob and tube wiring replacement near me in Ontario? Dab Electrical Services is the local electrical company Ontario homeowners and businesses trust. Knob and tube wiring has no ground, brittle insulation and cannot be buried in insulation. We replace it with modern grounded wiring and help you satisfy insurance requirements. We serve every neighborhood in Ontario and nearby Guasti, Montclair, Rancho Cucamonga.
Why choose Dab Electrical Services for knob and tube wiring replacement in Ontario? Because we show up when we say we will, explain every option in plain English and never pad the invoice. Our electricians in Ontario carry the parts for most jobs on the truck so your knob and tube wiring replacement is finished in one visit.
Popular searches we serve: knob and tube wiring replacement Ontario, knob and tube removal Ontario, knob and tube electrician Ontario, old wiring replacement Ontario.
Call: (888) 592-6466
Serving: Ontario and San Bernardino County, plus Guasti, Montclair, Rancho Cucamonga
Availability: 24/7 emergency · Same-day appointments
Call NowTell us what is going on. For emergencies we dispatch immediately; for projects we schedule a convenient arrival window.
Your electrician inspects the issue, explains the options and gives you a firm price before any work starts.
We complete the job to code, test everything, clean up and walk you through what was done.
Your work is backed by our workmanship warranty, and we are one call away if you ever need us again.
★★★★★“Had a Level 2 EV charger installed in the garage. Clean conduit run, permit handled, and they even submitted the rebate paperwork. Charging at home now.”
— Daniel R., Ontario, CA
★★★★★“Our breaker kept tripping every evening. The technician found a failing breaker and a loose neutral within an hour and fixed both. Honest pricing and no upsell.”
— Maria G., Ontario, CA
★★★★★“Sub panel for our new ADU, trenched and inspected without any hassle. Clear communication the whole way.”
— Andre L., Ontario, CA
Existing wiring is allowed in many areas, but it cannot be extended and insurers often refuse to cover it.
No. Covering knob and tube with insulation is a fire hazard and a code violation.
We fish new cable through existing paths and make small, patchable openings.
Same-day service is available for most calls in Ontario, and emergency dispatch typically arrives within 60 to 90 minutes.
All electrician services in Ontario → · Knob and Tube Wiring Replacement across California →
Upfront pricing. Same-day appointments. 24/7 emergency response.
(888) 592-6466Request Service Online