How Much Does Knob And Tube Wiring Replacement Cost?

Knob-and-tube wiring replacement cost is determined after an on-site inspection and a written quote because the scope varies by home. The most common driver is how much old wiring remains and how easy it is to access behind walls and ceilings. We map existing circuits, create a custom plan, and provide upfront pricing with no hidden fees; permits and inspections are handled, and new grounded wiring is installed to current Massachusetts code. Our electricians frequently perform this work in the Newton Center area with care for historic details. Financing is available, including 0% interest for 12 months.

Typical cost factors your electrician will evaluate include:

• Extent of remaining knob-and-tube and whether it’s a full or partial rewire
• Access conditions and any patching or restoration needs
• Panel or service capacity upgrades to support modern loads
• Added dedicated circuits and required safety devices (AFCI/GFCI)

Schedule a licensed assessment before budgeting and never attempt DIY on any live K&T wiring.

Updated: 2026-09-17

Need help in Newton Center, MA? Call (781) 762-9891 or book online. “I would highly recommend working with Castle!” — Michaela J.