Free tool
Knob and tube replacement cost calculator
Enter the scope, the size of the job, panel work and patching. The tool adds our typical ranges line by line, with the permit fee IBI publishes.
Describe the house
Conflux's typical range for your answers
$16,120 to $34,120
- Knob and tube replacement, whole house2,000 finished sq ft at $8 to $17 per sq ft$16,000 to $34,000
- PatchingNot included. We leave the openings patch-ready for your plasterer.Not in total
- IBI permit (City of Cincinnati)Added wiring, existing single-family: $60 processing plus $60.$120
Whole house, typical older home of about 1,500 to 2,500 sq ft: $12,000 to $35,000 and up.
A failed inspection adds a reinspection trip at $40.
How this range is worked out
These are Conflux's typical ranges, not a quote. We set the final price in your written estimate, built from your house's circuit list after the first visit. Live circuits, plaster, attic and basement access, and stories move your price within the range.
Programs worth checking
- Hamilton County's Home Improvement Program offers repair loans up to $50,000 at a rate below bank rates for eligible owners.
- The Revive + Thrive program launched in 2024 with low-interest loans that list electrical repairs; confirm it is currently open before counting on it.
This is a planning range, not a quote from Conflux Cincinnati Knob and Tube.
How do we work out your range?
This knob and tube replacement cost calculator applies our typical ranges at Conflux Cincinnati Knob and Tube to your answers and adds each part as its own line, the same way we build a written estimate for houses across Cincinnati, Hamilton County and Northern Kentucky.
| Line | How it is worked out |
|---|---|
| Whole house | Finished square feet times $8 to $17. A typical older home of about 1,500 to 2,500 sq ft runs $12,000 to $35,000 and up. |
| Partial replacement | Circuits times $750 to $2,500. A typical partial job runs $2,000 to $10,000. |
| Assessment only | Free: circuit tracing and a written circuit list |
| Panel | $2,000 to $4,500 for a 100A to 200A panel; $3,500 to $6,000 with a new service mast and meter base |
| Patching | $1,000 to $4,000 after a whole-house rewire, patch-ready to smooth, before paint. For a partial job it is priced in the written estimate. |
| Permit | IBI's published fee for a City of Cincinnati address; confirmed for the address elsewhere |
Nothing is clamped. A large house can run past the typical whole-house band, and a small one below it.
How do we set your actual price?
These are Conflux's typical ranges, not quotes. On the first visit we trace each circuit and mark it replace now, replace later or dead, then build your written estimate from that circuit list. That estimate sets the final price.
The count of live knob and tube circuits moves the number most. Floors, attic and basement access, plaster or drywall, and whether you live in the house during the work move it from there. The Cincinnati cost guide explains each driver, and comparing rewiring quotes shows how to read the estimates you receive.
What does the permit cost?
The permit line uses the IBI fee schedule effective January 1, 2025. Added wiring in an existing single-family home is $60 processing plus $60, $120 in all; a two-family is $125 and a three-family $130. A service entrance only, first dwelling unit, is $100, and each reinspection trip is $40. Outside the City of Cincinnati we confirm the fee for your address.
What isn't in the range?
- Painting after the openings are patched
- Asbestos testing or abatement where a nearby material is suspect
- Insulation, which follows the electrical work
Take the assessment to see how urgent your situation is.
Questions about the estimator
Why does the estimator use square feet for a whole house?
Because a whole-house job replaces every branch circuit, and floor area tracks how many there are well enough for a planning range. Conflux's typical rate is $8 to $17 per finished square foot. Live circuits, plaster and access decide where your house lands, which is why the written estimate comes from the circuit list.
Why does a partial job use circuits instead?
A partial job replaces chosen circuits, not the whole house, so floor area says little about it. Conflux's typical range is $750 to $2,500 per circuit, depending on the devices on each circuit and how hard the route is to reach.
What happens to my estimator answers if I send the form?
We add them to your request as part of the message, so the first conversation starts from what you already entered. If you do not send the form, the answers stay in your browser and in the page address.
Get an exact quote
Send the house details and we'll trace the circuits. We add your estimator answers to the request.