Knob-and-Tube Wiring Replacement · Pasadena, CA
Knob-and-Tube Wiring Replacement in Pasadena, 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 Bungalow Heaven, Madison Heights, Linda Vista and more
Why knob-and-tube wiring replacement comes up in Pasadena
Pasadena's Bungalow Heaven, Madison Heights and Playhouse Village are full of Craftsman bungalows from the 1900s to the 1920s, and many still have knob-and-tube wiring, sometimes buried under attic insulation. Insurers and buyers often ask about it. Raised foundations give the electrician a crawl space route, and the attic handles ceiling fixtures, so walls need only small openings.
Bungalow Heaven and other neighborhoods are landmark districts that review exterior changes. Permits come from the city's Planning and Community Development Department, and Pasadena Water and Power coordinates service work.
- Knob-and-tube in early-1900s craftsman homes.
- Bungalow Heaven and Madison Heights are full of craftsman homes from the 1900s to the 1920s, and many still have knob-and-tube, cloth-insulated wiring or a patchwork of later additions.
- Pre-purchase inspections of older craftsman homes look for knob-and-tube, ungrounded outlets and unpermitted additions.
- Permits in Pasadena
- Pasadena has its own building department, and electrical permits come from the city's Planning and Community Development Department; Altadena is unincorporated and permitted by Los Angeles County.
- Electric utility
- Pasadena Water and Power (city-owned)
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 Pasadena
Electricians set their own prices. Many homes have original or patched wiring and small services.
- 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 Pasadena: questions
Do I need a permit for knob-and-tube wiring replacement in Pasadena?
Usually, yes. Pasadena has its own building department, and electrical permits come from the city's Planning and Community Development Department; Altadena is unincorporated and permitted by Los Angeles County. The electrician normally pulls the permit and schedules the inspection.
Is the utility involved in Pasadena?
If the work affects the meter or service, the electrician coordinates with Pasadena Water and Power (city-owned), 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.
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