Whole-House Rewiring: What It Costs, What to Expect (2026 Guide)

Rewiring an entire house is one of the most disruptive and expensive electrical projects a homeowner can face. It is also one of the most important. Old wiring is a leading cause of residential electrical fires, and outdated systems simply cannot handle modern electrical loads safely.

When Does a House Need Rewiring?

Knob-and-tube wiring. Common in homes built before 1950. The insulation deteriorates over decades, and the system has no ground wire. Most insurance companies will not cover homes with active knob-and-tube wiring.

Aluminum branch wiring. Used in homes built between roughly 1965 and 1973. Aluminum wiring expands and contracts more than copper, creating loose connections that overheat. It requires either full replacement or approved remediation at every connection point.

Cloth-insulated wiring. The fabric insulation on wiring from the 1950s and 1960s becomes brittle and cracks, exposing conductors. This is a fire hazard.

Frequent electrical issues. Flickering lights, warm outlets, burning smells, or breakers that trip regularly can all indicate wiring problems beyond what a simple repair can fix.

Major renovation. If you are gutting a house or opening up walls for a remodel, it is the ideal time to rewire since the walls are already open.

What Does Rewiring Include?

A full rewire replaces all the wiring from the electrical panel to every outlet, switch, and fixture in the home. A typical project includes:

• Removing old wiring (or abandoning it in place if removal is impractical)
• Running new copper NM-B (Romex) cable throughout the house
• Installing new outlets and switches to meet current code (including AFCI and GFCI protection where required)
• Upgrading the electrical panel (usually to 200A if not already)
• Adding circuits to meet modern code requirements
• Permit and inspection

The electrician will also bring the home up to current electrical code, which typically means more circuits, more outlets, and specific protections in kitchens, bathrooms, and bedrooms.

Cost Breakdown

Factor	Typical Range
Small home (under 1,200 sq ft)	$8,000-$12,000
Mid-size home (1,200-2,500 sq ft)	$12,000-$18,000
Large home (over 2,500 sq ft)	$18,000-$30,000+
Panel upgrade (if needed)	$1,800-$4,500
Drywall repair (patching)	$1,000-$4,000

The biggest cost drivers are square footage, number of stories, wall accessibility, and local labor rates. A single-story ranch with an accessible attic and crawl space is far cheaper to rewire than a two-story home with finished walls and no attic access.

The Process Step by Step

1. Assessment and quote (1-2 days). The electrician inspects the existing wiring, counts circuits, and identifies access points. You get a detailed scope of work and price.

2. Permit (1-7 days). Your electrician pulls the permit from the local building department.

3. Rough-in wiring (3-7 days). This is the main phase. The electrician cuts small access holes in walls and ceilings, fishes new wire through the structure, and installs new outlet and switch boxes. In a gut renovation, this is straightforward since walls are open.

4. Panel installation (1 day). The new panel is installed and all new circuits are connected.

5. Inspection (1-3 days). The building inspector verifies the rough-in work before walls are closed.

6. Finish work (1-2 days). Outlets, switches, and cover plates are installed. Fixtures are connected.

7. Drywall patching (varies). Access holes are patched and painted. Some electricians include this; most do not. Budget for a drywall contractor separately.

Total timeline: 2-4 weeks for the electrical work, plus drywall repair time.

Can You Live in the House During Rewiring?

Yes, in most cases. Electricians typically work room by room or zone by zone, keeping power on to the rest of the house. Expect some days without power to specific rooms. The panel swap day will require a full-house outage for several hours.

It is uncomfortable but manageable. Dust from wall access holes is the biggest nuisance. Seal doorways with plastic sheeting if dust sensitivity is a concern.

If the home is being gut-renovated, you should not be living in it regardless.

How to Reduce Costs

Rewire during a renovation. If walls are already open, the labor drops significantly because the electrician does not need to fish wire through closed walls.

Handle drywall patching yourself. The access holes are typically small (4-6 inches). Patching drywall is a straightforward DIY task that can save $1,000-$3,000.

Get multiple quotes. Rewiring estimates can vary by 30-50% between electricians. Get at least three detailed written quotes and compare scope, not just price.

Ask about partial rewiring. If only specific areas have problematic wiring, a targeted rewire of those zones may be sufficient. Your electrician can advise whether a full or partial rewire makes sense.

FAQ

How long does a full rewire take?

Expect 2-4 weeks for the electrical work in a typical 1,500-2,500 sq ft home. Add another week or two for drywall repair and painting. Gut renovations are faster on the electrical side since walls are open.

Do I need a permit for rewiring?

Yes. A full rewire always requires a permit and one or more inspections. Your electrician handles this. Never hire an electrician who suggests skipping the permit — it creates liability, code violations, and problems when you sell the home.

Will rewiring damage my walls?

The electrician will cut access holes to fish wire through walls and ceilings. These are typically small and repairable, but there will be patching needed. In a best-case scenario with good attic and crawl space access, wall damage is minimal. In a worst case with no access points, more drywall removal is required.

Is rewiring covered by insurance?

Homeowners insurance typically does not cover the cost of rewiring as a maintenance upgrade. However, if your insurer requires it (common with knob-and-tube or aluminum wiring), failing to rewire could result in policy cancellation or non-renewal. Some insurers offer a grace period to complete the work.

How do I know if my wiring is safe?

Hire a licensed electrician for an electrical inspection. They will check your panel, wiring type, grounding, and connections. This typically costs $200-$400 and gives you a clear picture of what needs attention.