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Home Rewiring · Illinois
Rewiring replaces old branch-circuit wiring, such as knob-and-tube, ungrounded cloth-insulated cable or 1960s–70s aluminum branch wiring, with modern grounded copper cable. It can be done room by room, and an electrician will tell you which circuits matter most.
Chicago-area housing includes many pre-1950 two-flats and bungalows, and Chicago requires conduit in most new wiring.
Across the Midwest, homes deal with cold winters, severe thunderstorms and tornado season. Permit offices, utilities and housing stock differ by city, which affects how home rewiring is planned and scheduled. These local guides cover the Illinois cities where we have written specific notes.
Chicago is one of the few large US cities that requires most new wiring to run in metal conduit, so rewiring a bungalow or two-flat here is a different job from the plastic-sheathed cable common elsewhere. Expect more labor, more wall and ceiling access, and a contractor registered with the city.
Utility: ComEd
The West Bluff and Uplands neighborhoods hold some of Peoria's grandest homes, built for the city's industrialists and merchants from the late 1800s to the 1930s, and many still have knob-and-tube or cloth-insulated wiring behind plaster. Near Bradley University, many large houses were split into student apartments, leaving small services and circuits added over decades.
Utility: Ameren Illinois
Haight Village and Churchill's Grove are two of Rockford's oldest neighborhoods, with Italianate, Queen Anne and early-1900s homes that often still have knob-and-tube in the walls and attics. Many were divided into apartments in the mid-1900s, leaving a mix of small services and add-on circuits.
Utility: ComEd
1. Assessment
Wiring type, condition and circuit layout are documented.
2. Plan and permit
Circuits are prioritized and the work is permitted.
3. Rewire
New cable is fished through walls and ceilings with minimal openings.
4. Inspection and patching
Rough-in and final inspections, then wall openings are closed.
Electricians set their own prices; local permit fees and utility requirements add to these factors.
Permits come from the city or county where the home is. For example: Chicago: Electrical permits in Chicago are issued by the Department of Buildings and the work must be done by a licensed electrical contractor registered with the city. Peoria: Electrical permits inside the city come from the City of Peoria's community development department. Rockford: Electrical permits inside the city come from the City of Rockford's construction services; Loves Park, Machesney Park and Winnebago County issue their own.
Chicago: ComEd. Peoria: Ameren Illinois. Rockford: ComEd.
No. Many homeowners rewire in phases, starting with kitchens, baths and bedrooms.
Aluminum branch wiring can overheat at connections. Approved repairs (such as rated connectors) or replacement reduce the risk; an electrician can advise which fits.
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