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

Replacing knob-and-tube wiring is quoted after an on-site inspection; Castle Electric provides a detailed scope, timeline, and upfront pricing for each home. The biggest cost driver is how much wiring must be replaced and how accessible it is behind walls and ceilings. Our full process covers safe removal, installation of modern grounded wiring, testing, and final documentation that helps with insurance or resale. We can integrate smart-ready upgrades during the project, and financing options are available for larger jobs. We often rewire older homes in the Auburndale area and take extra care to preserve finishes while meeting Massachusetts codes.

Cost varies based on:

• Total square footage and number of circuits to replace
• Need for panel upgrades or new dedicated circuits
• Access conditions and restoration required after wiring (plaster, finished spaces)
• Add-ons like surge protection, smart switches, or USB outlets

Schedule an inspection to confirm scope and safety before setting a budget. <br/> Updated: 2026-04-25 <br/> Need help in Auburndale, MA? Call (781) 762-9891 or book online. “We have every reason to say you should expect a positive experience with this company.” — Richard Kelly.