Whole-House Rewiring Cost: When Your Home Needs New Wiring
Whole-house rewiring costs $8,000 to $20,000 or more in 2026, depending on home size, number of circuits, accessibility of existing wiring, and local labor rates. Most homeowners pay $10,000 to $15,000 for a complete rewire of a 1,500 to 2,500 square foot home. The whole-house rewiring cost is significant, but outdated wiring is a leading cause of residential fires in the United States, and homes with knob-and-tube or aluminum wiring often cannot be insured without replacement. This guide covers pricing, the rewiring process, and how to determine whether your home needs new wiring.
Whole-House Rewiring Cost by Home Size
| Home Size (sq ft) | Circuits | Estimated Cost |
|---|---|---|
| Under 1,000 | 10–15 | $8,000–$12,000 |
| 1,000–1,500 | 15–20 | $9,000–$14,000 |
| 1,500–2,500 | 20–30 | $10,000–$18,000 |
| 2,500–3,500 | 25–40 | $14,000–$22,000 |
| 3,500+ | 30–50+ | $18,000–$30,000+ |
These costs include the new wiring, breakers, outlets, switches, and installation labor. They typically do not include a new electrical panel (add $1,500 to $4,000 if an electrical panel upgrade is also needed) or drywall repair after the rewiring is complete (add $1,000 to $5,000 depending on the extent of wall openings).
Cost Factors That Affect Rewiring Price
Accessibility
How the electrician accesses your walls and ceilings is the biggest variable in rewiring cost after home size:
- Open walls (during renovation): The cheapest scenario. If you are already gutting rooms for a kitchen remodel, bathroom renovation, or addition, rewiring open walls adds minimal labor. Savings: 30% to 50% compared to fishing wire through finished walls
- Unfinished attic and basement: The second cheapest. Electricians run new wire through the attic and basement, dropping it down or pushing it up through wall cavities. Moderate wall opening required
- Finished attic and basement: More drywall removal needed to access wire routes. Adds $1,000 to $3,000 in access and repair costs
- Single-story slab home: The most challenging and expensive. No basement below and often limited attic space above. Electricians may need to run wire through exterior walls or use surface-mounted conduit in some areas. Adds $2,000 to $5,000
Number of Outlets and Circuits
Modern electrical code requires more outlets and circuits than homes built 40+ years ago. A rewire is an opportunity (and often a requirement) to bring the home up to current code:
- Outlets every 12 feet: Code requires an outlet within 6 feet of any point along a wall, effectively placing outlets every 12 feet. Older homes may have outlets every 15 to 20 feet
- Kitchen circuits: Modern code requires at least two 20-amp small appliance circuits, a dedicated dishwasher circuit, a dedicated disposal circuit, and a dedicated refrigerator circuit. Older kitchens may have everything on one or two circuits
- Bathroom circuits: Each bathroom needs a dedicated 20-amp circuit
- GFCI protection: Required in bathrooms, kitchens, garages, outdoors, laundry rooms, and near any water source
- AFCI protection: Required on most living area circuits to detect and prevent arc faults (a leading cause of electrical fires)
Adding outlets and circuits beyond the minimum code requirements (home office circuits, USB outlets, outdoor lighting circuits) adds $200 to $500 per circuit.
Electrician Rates
Electricians charge $75 to $150 per hour in 2026, with rates varying significantly by region. Urban areas and markets with high construction activity command higher rates. Most rewiring projects are quoted as a flat bid rather than hourly, but the per-hour rate affects the overall bid. A whole-house rewire typically requires 40 to 80 labor hours depending on home size and complexity.
Types of Wiring That Need Replacement
Not all old wiring needs replacement. Here are the types that do:
Knob-and-Tube Wiring
Found in homes built before 1950, knob-and-tube (K&T) wiring runs individual hot and neutral wires through ceramic knobs and tubes in the wall framing. It has no ground wire, no GFCI protection, and deteriorating insulation that becomes a fire hazard. Most home insurers will not cover homes with active K&T wiring, and many mortgage lenders will not approve loans for these properties.
K&T wiring is the most common reason for a full rewire. Replacement is not optional—it is a safety and insurability requirement.
Aluminum Wiring
Aluminum wiring was used in many homes built between 1965 and 1973 as a less expensive alternative to copper. The problem: aluminum expands and contracts more than copper with temperature changes, loosening connections over time and creating fire hazards at outlets, switches, and junction boxes. Homes with aluminum wiring are 55 times more likely to have fire-hazard conditions at connections than homes with copper wiring.
Aluminum wiring does not always require a full rewire. Options include:
- Full rewire: $8,000–$20,000+ (replaces all aluminum with copper)
- COPALUM crimps: $3,000–$8,000 (a licensed electrician crimps copper pigtails onto every aluminum connection using a special tool). This is the repair method recommended by the CPSC
- AlumiConn connectors: $2,000–$5,000 (an approved connector that joins aluminum to copper at each outlet and switch). Less expensive than COPALUM but requires proper installation
Cloth-Covered Wiring
Wiring from the 1940s through 1960s often has cloth insulation rather than the plastic (thermoplastic) insulation used today. Cloth insulation degrades over time, crumbling and exposing bare conductors. While not as immediately dangerous as K&T wiring, deteriorated cloth-covered wiring is a fire hazard and should be replaced during any major renovation.
Undersized Wiring
Some older homes have 14-gauge wire on 20-amp circuits or 12-gauge wire on 30-amp circuits—mismatches that create overheating risk. This is a code violation and fire hazard that should be corrected during a rewire.
The Rewiring Process: What to Expect
A whole-house rewire is a multi-day project that involves significant disruption. Here is the typical timeline and process:
Phase 1: Planning and Permits (1–2 weeks before work begins)
The electrician surveys your home, counts circuits and outlets, identifies wire routes, and prepares a bid. Once accepted, they pull permits from the local building department. Permit costs: $200 to $800 for a full rewire.
Phase 2: Rough-In Wiring (3–7 days)
The crew opens walls and ceilings where needed, runs new Romex (NM-B) cable through wall cavities and between floors, installs new outlet and switch boxes, and connects everything back to the electrical panel. This is the most disruptive phase—expect dust, noise, and holes in walls.
Power is usually maintained throughout the project by keeping old circuits live until new ones are connected. The electrician switches circuits over one at a time, minimizing the time any room is without power.
Phase 3: Inspection
The building inspector reviews all rough-in wiring before walls are closed. This inspection is mandatory and ensures the new wiring meets code. If corrections are needed, the electrician addresses them before proceeding.
Phase 4: Finish Work (1–2 days)
After walls are repaired (by a drywall contractor or the homeowner), the electrician returns to install outlets, switches, cover plates, and light fixtures. Final connections are made and all circuits are tested.
Phase 5: Final Inspection
A second inspection verifies the completed installation. After passing, the project is done and the permit is closed.
Rewiring and Other Projects: Bundling for Savings
A rewire is most cost-effective when combined with other projects that already require opening walls:
- Kitchen or bathroom remodel: If walls are already open for a kitchen remodel or bathroom renovation, rewiring those rooms adds only the cost of materials and a day of electrician labor
- Re-piping: Whole-house pipe replacement also requires wall access, and coordinating both projects shares the cost of drywall demolition and repair
- Insulation: If you are improving insulation during a rewire, the open walls allow both projects to proceed without separate demolition
- Panel upgrade: A rewire almost always includes an electrical panel upgrade. Bundling the two saves $500 to $1,000 compared to doing them separately
If you are planning a major renovation, discuss the full electrical scope with your electrician early. Rewiring a kitchen during a gut remodel costs far less than rewiring it separately after the renovation is complete.
Rewiring and Home Value
New wiring does not typically add a dollar-for-dollar premium to your home’s sale price. But it eliminates one of the most serious red flags an inspector can find. Homes with knob-and-tube, aluminum, or deteriorated wiring face:
- Buyer credits of $5,000 to $20,000 to cover future rewiring
- Insurance complications that can block the sale
- Financing issues if the lender requires electrical updates before closing
- Lower offers from buyers who price in the cost and hassle of rewiring after purchase
If you are selling a home with outdated wiring, rewiring before listing is usually the right move. The cost of the rewire ($8,000 to $20,000) is often less than the combined buyer credits, lower offers, and extended time on market you would face otherwise.
For buyers, wiring condition is a critical factor in your offer. If the home inspection reveals knob-and-tube or aluminum wiring, get a rewiring quote from a licensed electrician and negotiate accordingly. Our estimate your monthly payment helps you model the cost of including rewiring in your loan amount.
Partial Rewiring: When You Do Not Need a Full Rewire
Not every home with old wiring needs a complete rewire. Partial rewiring addresses the most critical areas while leaving functional wiring in place:
| Partial Rewire Scope | Estimated Cost |
|---|---|
| Single room | $1,500–$3,500 |
| Kitchen only | $2,000–$5,000 |
| One floor of a two-story home | $4,000–$10,000 |
| Specific hazardous circuits only | $2,000–$6,000 |
Partial rewiring makes sense when most of the wiring is in good condition but specific areas have problems—a kitchen with insufficient circuits, a bathroom without GFCI protection, or a section of deteriorated cloth-covered wire. If the overall system is knob-and-tube or aluminum throughout, partial rewiring is a temporary measure at best.
Safety Risks of Old Wiring
The consequences of neglecting outdated wiring are severe. According to the National Fire Protection Association, electrical failures cause an estimated 46,000 home fires per year in the United States, resulting in hundreds of deaths and billions in property damage. Old wiring contributes to these fires through:
- Arc faults: Damaged insulation allows current to arc between conductors, generating intense heat. Modern AFCI breakers detect and prevent these arcs; old wiring has no such protection
- Overloaded circuits: Homes built for 1950s electrical loads cannot safely handle modern demands. Circuits designed for a radio, lamp, and clock are now powering computers, TVs, phone chargers, and space heaters
- Loose connections: Aluminum wiring and old splices loosen over time, creating hot spots that can ignite surrounding materials
- No ground wire: Knob-and-tube and some early NM cable have no equipment grounding conductor. Without grounding, a fault in an appliance or tool can electrify the metal housing, creating shock and fire risk
Financing a Rewire
At $8,000 to $20,000+, a whole-house rewire is one of the more expensive home maintenance projects. Financing options include:
- HELOC: A home equity line of credit offers the lowest interest rates for homeowners with sufficient home equity. Interest may be tax-deductible since the project improves the home
- Home improvement loan: Unsecured personal loans for home improvement run 8% to 15% APR. Good for homeowners with limited equity or who prefer not to use their home as collateral
- Contractor financing: Some electrical companies offer 0% financing for 12 to 24 months. Read the terms carefully—deferred interest can apply if the balance is not paid in full
- FHA 203(k) loan: If you are buying a home that needs rewiring, an FHA 203(k) loan rolls the purchase price and renovation costs into a single mortgage. This can be a cost-effective way to finance a rewire at mortgage rates rather than personal loan rates
Frequently Asked Questions
How long does whole-house rewiring take?
The electrical work takes 3 to 10 days depending on home size and accessibility. Add 2 to 5 days for drywall repair afterward. Total project timeline including permits and inspections is typically 2 to 4 weeks.
Can I live in my house during a rewire?
Yes. The electrician maintains power to most of the home during the project, switching circuits over progressively. Expect dust from wall openings and temporary loss of power to individual rooms as circuits are moved. Most families find it inconvenient but livable.
Do I need to rewire my whole house or just part of it?
If your home has knob-and-tube wiring throughout, a full rewire is recommended. If the issue is limited (aluminum connections, one section of deteriorated wire, or a kitchen needing more circuits), partial rewiring may be sufficient. A licensed electrician can evaluate and recommend the right scope after inspecting your system.
Does rewiring include new outlets and switches?
Yes. New wiring means new outlet boxes, switches, and receptacles throughout the home. Most electricians include standard-grade outlets and switches in their bid. Upgraded options (decorator-style, USB outlets, smart switches) cost $5 to $50 more per device.
Will I need to repaint after rewiring?
Likely yes, at least in areas where walls were opened. Drywall patches can be textured and painted to match, but an exact match to existing paint is difficult. Some homeowners use a rewire as the trigger for repainting rooms or the entire home. Budget $500 to $5,000 for drywall repair and painting, depending on the number of wall openings.
How do I know if my house has knob-and-tube wiring?
Check visible wiring in the attic, basement, or crawl space. Knob-and-tube wiring consists of individual black and white wires running through ceramic knobs on wood framing and through ceramic tubes where they pass through studs. If you see these ceramic components, your home has K&T wiring. A home inspection will also identify wiring types.
Rewiring your home is a major project, but it is one that directly protects your family and property. If your home’s wiring is past its useful life, addressing it sooner rather than later prevents the risks and costs of electrical fires and insurance complications. Pair the rewire with an electrical panel upgrade for a complete electrical overhaul, and consider timing the project alongside any plumbing work (pipe replacement, bathroom renovation) to share the cost of wall access. For an overview of all your home improvement options and their returns, explore our check renovation ROI and home services directory.