Knob-and-Tube Wiring Replacement · Tacoma, WA
Knob-and-Tube Wiring Replacement in Tacoma, WA
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 Stadium District, North Slope, Proctor and more
Why knob-and-tube wiring replacement comes up in Tacoma
Tacoma's Stadium District, North Slope and Proctor neighborhoods hold Victorian and Craftsman homes from the 1890s to the 1920s, and knob-and-tube wiring is still found in many of them. Hillside lots and damp basements can complicate routing. Owners adding insulation or heat pumps often replace knob-and-tube first.
Basements and attics give the electrician routes for new cable, and North Slope is a historic district with design review. Permits come from the city's Planning and Development Services, and Tacoma Power, the city-owned utility, coordinates service work.
- Tacoma's North End, Stadium District and Hilltop have homes from the 1890s to the 1920s, many with knob-and-tube, and South Tacoma has post-war homes.
- Older homes often have small services and knob-and-tube that should be assessed before insulating.
- Knob-and-tube in early-1900s homes.
- Homes in Tacoma's North End, Stadium District and Hilltop were mostly built between the 1890s and the 1920s, and knob-and-tube is common.
- It usually comes up before insulation projects, since insulating over active knob-and-tube is a concern, or when an insurer asks.
- Tacoma's Stadium District, North Slope and Proctor neighborhoods hold many Victorian and Craftsman homes from the late 1800s to the 1920s, and an inspection before buying commonly finds knob-and-tube, ungrounded outlets, small services and wiring added during basement conversions.
- Permits in Tacoma
- Electrical permits in Tacoma come from the city's Planning and Development Services; most of the rest of Washington is permitted by the state Department of Labor and Industries, which also licenses electricians.
- Electric utility
- Tacoma 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 Tacoma
Electricians set their own prices. Older homes often have small services and knob-and-tube that should be assessed before insulating.
- 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 Tacoma: questions
Do I need a permit for knob-and-tube wiring replacement in Tacoma?
Usually, yes. Electrical permits in Tacoma come from the city's Planning and Development Services; most of the rest of Washington is permitted by the state Department of Labor and Industries, which also licenses electricians. The electrician normally pulls the permit and schedules the inspection.
Is the utility involved in Tacoma?
If the work affects the meter or service, the electrician coordinates with Tacoma 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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