Electrical · Wiring and Outlets
Knob and Tube Wiring Replacement Cost, Permits and Who Does the Work
Removing an existing knob and tube wiring and installing a new one, typically handled by a electrician.
Model reviewed August 2026
Typical cost
$9,500
National, standard scope
Range
$4,500 – $22,000
Low to high scope
Trade
Electrician
DIY difficulty 1/5
Permit
Usually required
Plan on a permit and inspection
Do I need a permit for knob and tube wiring replacement?
Usually yes
Knob and Tube Wiring work at this scope touches structure, life safety or a permitted trade in most jurisdictions, so a permit and inspection are normally required. Always confirm with the building department that has jurisdiction over your address.
Cost breakdown
Modeled national figures for a standard single-family job.
| Low endSimple scope, easy access, no surprises | $4,500 |
|---|---|
| TypicalWhat most homeowners pay | $9,500 |
| High endLarge scope, upgrades or difficult conditions | $22,000 |
| Job type | Project |
| Cost varies by location | High |
Related jobs
Related projects homeowners often plan together.
Also searched as
You may also hear this called:
replace knob and tube wiring · new knob and tube wiring · knob and tube wiring replacement cost · knob and tube wiring swap
Frequently asked questions
How much does knob and tube wiring replacement cost?
Most homeowners pay between $4,500 and $22,000, with $9,500 typical for a standard single-family job. Figures are modeled national estimates, not quotes.
Do I need a permit for knob and tube wiring work?
Yes — in most jurisdictions this job is permitted and inspected. Check your local building department before work starts.
Who does knob and tube wiring replacement?
A electrician handles this job. DIY difficulty is rated 1/5 (5 = very DIY friendly).
Does the price change much by location?
Yes. Across the states we price, the typical cost ranges from $8,550 to $12,445 — about a 46% spread — driven by labor rates, code requirements and permit fees.