Knob-and-Tube Wiring Replacement · San Diego, CA
Knob-and-Tube Wiring Replacement in San Diego, CA
Knob-and-tube replacement removes early wiring (about 1880s to 1940s) that runs on ceramic knobs and tubes without a ground, and replaces it with modern grounded cable. It is commonly done before insulating, during renovations, or when an insurer requires it.
- Call now to check electrician availability in your area
- Independent, licensed electricians
- Serving North Park, Clairemont, Point Loma and more
Why knob-and-tube wiring replacement comes up in San Diego
Craftsman bungalows in North Park, South Park and University Heights and Spanish Revival homes in Kensington and Mission Hills often still have knob-and-tube wiring from the 1910s to the 1930s. Some insurers decline homes with active knob-and-tube, and buyers often ask about it. Raised foundations and attics give the electrician routes for new cable, so walls need only small openings.
Historic districts review exterior changes. A rewire is also the time to add grounded outlets and AFCI and GFCI protection. Permits come from the city's Development Services Department.
- San Diego's early-1900s craftsman homes in North Park, South Park and Kensington can still have knob-and-tube wiring or cloth-insulated cable, often mixed with later additions.
- San Diego's older homes in North Park, South Park, Kensington and Mission Hills include Craftsman bungalows and Spanish Revival houses from the 1910s to the 1930s, and many have knob-and-tube, ungrounded outlets or undocumented additions.
- San Diego repair calls often involve aging panels in mid-century homes, especially Zinsco and Federal Pacific panels in Clairemont and Serra Mesa, Craftsman bungalows in North Park with knob-and-tube still in use, and coastal homes where salt air corrodes outdoor connections and meter bases.
- Permits in San Diego
- Inside city limits, electrical permits come from the City of San Diego Development Services Department; other cities in the county and unincorporated areas have their own building departments.
- Electric utility
- SDG&E
Signs to look for
- Ceramic knobs and tubes visible in the attic or basement
- Two-prong outlets throughout the house
- An insulation contractor or energy program requiring an assessment
- An insurer asking about wiring type
- Fuses or a small service alongside old wiring
How the work is done
1. Trace active circuits
The electrician identifies which knob-and-tube runs are still live and where they go.
2. Plan the routes
New cable routes are planned through attics, basements and walls to minimize openings.
3. Install new circuits
Grounded cable, boxes and devices are installed and the old wiring is disconnected.
4. Inspect and patch
Rough-in and final inspections are completed, and access holes are patched.
What moves the price in San Diego
Electricians set their own prices. Rooftop solar is very common, and adding solar, a battery, an EV charger or a heat pump to an original 60 or 100 amp panel often requires an upgrade.
- How much knob-and-tube is still active
- Plaster versus drywall walls
- Attic and basement access
- Number of floors
- Panel upgrade at the same time
- Wall patching and painting
Knob-and-Tube Wiring Replacement in San Diego: questions
Do I need a permit for knob-and-tube wiring replacement in San Diego?
Usually, yes. Inside city limits, electrical permits come from the City of San Diego Development Services Department; other cities in the county and unincorporated areas have their own building departments. The electrician normally pulls the permit and schedules the inspection.
Is the utility involved in San Diego?
If the work affects the meter or service, the electrician coordinates with SDG&E, which owns the meter and service drop.
Is knob-and-tube wiring illegal?
Existing knob-and-tube is generally not illegal, but it cannot be extended, and many insurers and lenders treat it as a reason to replace.
Can knob-and-tube be insulated over?
It is not recommended, and many codes and insulation programs prohibit it, because the wiring relies on open air to cool.
How do I know if mine is still live?
An electrician can test it. Many homes have a mix of active and abandoned knob-and-tube.
How long does replacement take?
From a few days for a small home with good access to a few weeks for larger plaster-walled homes.
Related help in San Diego
Knob-and-Tube Wiring Replacement in other cities
Need knob-and-tube wiring replacement in San Diego?
Call now and we connect you with a licensed electrician who serves your ZIP code.