How Much Does It Cost to Rewire a House?

Cost Breakdown

What Affects the Cost

Permits

DIY Difficulty

How do you rewire a house?

Rewiring a house means replacing old branch-circuit wiring with new cable, then landing those circuits in the existing panel or a new panel if the service needs to be upgraded. An electrician starts by mapping what the existing circuits actually feed, then runs new cable to outlets, switches, lights, appliances, smoke alarms, and other required locations. The new electrical work has to meet current code, including grounding, box fill, circuit protection, and device placement.

In a finished home, the job is mostly about access. You're fishing wire through wall and ceiling cavities, working from the basement or attic where possible, and opening strategic cutouts where the framing blocks the path. On a lived-in rewire, I'm usually thinking about sequencing as much as wiring. You don't want to randomly tear the whole house apart. You stage the work by area, keep safe temporary power where practical, and avoid killing critical circuits like the fridge, furnace, sump pump, or internet for longer than necessary.

How long does it take to rewire a house?

A whole-house rewire typically takes 5 to 14 days for the electrical work itself, depending on the size of the home, the crew size, and how much wall access is available. A compact house with an unfinished basement, open attic, and simple layout goes much faster than a fully finished home where every circuit has to be fished through plaster, blocking, insulation, or remodeled ceilings.

The schedule also depends on inspections and restoration. Rough inspection usually happens before walls and ceilings are closed back up. Final inspection happens after devices, fixtures, breakers, and labeling are complete. The electrical work may be done in a week or two, but drywall patching, painting, and inspection timing can stretch the full project timeline beyond that.

Can you rewire a house without removing drywall?

You can often rewire a house with limited drywall removal, but "no drywall removal" is not a promise I'd make before walking the house. The deciding factors are access from the basement or attic, wall construction, insulation, fire blocking, plaster condition, and whether the existing box locations can be reused cleanly.

On a walkthrough, I'm looking for unfinished basement ceilings, attic access above the rooms, open stud bays near the panel, stacked walls, and whether the existing devices line up with realistic wire paths. If I see finished ceilings everywhere, exterior walls packed with insulation, old plaster-and-lath, or multiple remodel layers, I'm planning on more openings. A good electrician can limit damage, but some patching is part of the job if you want the wiring done correctly.

How much more does it cost to rewire an old house?

Older homes usually cost more to rewire because the wiring is only part of the problem. Knob-and-tube wiring, brittle cloth insulation, ungrounded circuits, crowded boxes, and outdated panels all add time. Plaster-and-lath is slower to open and repair than drywall, and older homes often need more circuits than they originally had because modern kitchens, bathrooms, offices, laundry areas, and garages use far more power than the house was built around.

The surprise I see in older Twin Cities homes is how many generations of work are hidden behind the walls. You'll open one area and find original wiring, a 1970s add-on, a basement finish from the 1990s, and a newer homeowner splice all stacked together. That is what pushes cost up. It's not just pulling new wire. It's figuring out what still feeds what, removing unsafe work, adding proper grounding, and rebuilding the electrical layout so the house makes sense again.

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