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

Replacing knob-and-tube wiring is priced after an on-site assessment, because total cost varies with home size, access, and required safety upgrades. The biggest cost driver is the labor needed to run new circuits and reach hidden spaces without excessive damage to finishes.

Our licensed electricians frequently update older homes across the Knoxville area. Atomic Electric Service Inc. provides detailed estimates before work begins and backs craftsmanship with a 1-year warranty. In occupied homes, we often phase the project room by room to cut disruption and keep essentials powered.

Expect pricing to shift based on:

• Square footage and how many circuits must be replaced.
• Access in attics/crawlspaces and whether walls are plaster or lathe.
• Needed panel capacity, GFCI/AFCI protection, and smoke-alarm upgrades.
• Pairing with a remodel, which can lower access time.

If wiring is brittle, cloth insulation is crumbling, or splices are unsafe, plan on a full replacement; if only small areas remain and test sound, a targeted rewire can bridge to a future full project. An in-home evaluation is the safest way to confirm scope, timeline, and a firm written price. <br/> Updated: 2026-04-30 <br/> Need help in Halls, TN? Call (865) 224-3898 or book online.