How much does it cost to replace knob and tube wiring?

Replacing knob-and-tube wiring is priced case by case, with a firm flat-rate provided only after an on-site inspection and written report. The biggest cost factor is how much original wiring remains and how accessible it is behind walls and ceilings. We regularly rewire older homes throughout the Chatham area. On plaster-and-lath houses, planned wire fishing and patch sequencing often saves more than adding extra openings. If insulation covers active knob-and-tube or cloth insulation is brittle, treat replacement as a priority; if much has been modernized and tests safe, phasing the work is reasonable. We offer flat rate pricing and financing for larger projects.

What usually changes the total:

• Electrical panel capacity and any needed upgrade
• Number of new circuits, outlets, and code-driven protections (AFCI/GFCI)
• Wall/ceiling access strategy and patching scope
• Permit requirements and any utility coordination for service upgrades
• Add-ons like whole-home surge protection or EV charger circuits

Schedule a professional electrical inspection to receive an itemized, written proposal for your home.

Updated: 2026-07-04

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