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

Replacing knob-and-tube wiring is priced after an on-site evaluation of your home’s electrical system. Most projects hinge on how much of the house needs new grounded copper circuits and any upgrades required to meet the current electrical code. We pull permits, coordinate final inspections, and typically finish a full-home rewire in 5 to 10 business days. Our licensed team updates AFCI and GFCI protection as needed and uses wall-fishing methods to limit openings. In practice, the time sink in older homes is often at hidden junctions behind plaster, not the straight wire runs. We regularly complete these rewiring projects for homeowners in the Boulder area. Flexible financing is available. If you notice burning smells or scorched outlets, shut off the affected circuit and call an electrician.

• Key factors that set the price:
• Square footage and number of circuits to replace
• Access conditions (basement, crawlspace, finished walls)
• Panel capacity upgrades or new dedicated circuits for modern loads
• Adding items like smoke detectors or whole-home surge protection

Schedule an in-home assessment to receive a firm, line-item quote tailored to your layout. <br/> Updated: 2026-04-09 <br/> Need help in Boulder, CO? Call (303) 647-7885 or book online. "The electrician was prompt, professional, left no mess and did a great job. Would definitely use them again for future projects!" — Jennye C.