A full home electrical rewire or panel upgrade isn't something you can put off indefinitely—outdated wiring causes fires, and an undersized panel leaves you scrambling during peak load times. Whether you're dealing with 60-amp service from 1970 or knob-and-tube wiring that your insurance company refuses to cover, upgrading your electrical system is one of the most impactful safety and value investments you can make. This guide walks you through what to expect, how to budget, and what questions to ask before hiring.
When You Actually Need a Panel Upgrade
A panel upgrade becomes necessary when your home's electrical demand outpaces what your current service can deliver. The most common triggers are:
- Adding major appliances (electric range, heat pump, EV charger)
- Renovating a kitchen or bathroom with multiple new circuits
- Upgrading from 100-amp to 200-amp service (the modern standard)
- Any panel showing rust, corrosion, or visible damage
- Insurance or lender requirements (especially for older homes)
If you're constantly tripping breakers or notice dimming lights when the AC kicks on, you're living on borrowed time. These aren't minor inconveniences—they're warnings.
What a Full Home Rewire Involves
A whole-home rewiring job goes beyond swapping the panel. It means replacing copper or aluminum wiring throughout the house, upgrading outlets and switches, and installing new cable runs to code. This is invasive work: electricians will cut into walls, ceilings, and sometimes crawl spaces to access and replace wire.
Scope typically includes:
- Removing old wiring (knob-and-tube, aluminum, undersized copper)
- Installing new Romex or conduit throughout the house
- Upgrading the main service panel and breakers
- Adding GFCI and AFCI protection where required by current code
- New outlet and switch boxes, often repositioned for convenience
- Testing and inspection at completion
Not every rewire requires a full gut. Targeted rewiring—updating just a kitchen, basement, or addition—is far cheaper and faster, running $1,500–$5,000 depending on square footage and complexity.
Budget Realistically
Panel upgrades and rewiring costs vary widely based on home age, size, and code requirements in your area.
Typical price ranges:
- Panel upgrade only (no rewiring): $1,200–$3,500 for a 100→200 amp swap
- Partial rewiring (one floor or room): $3,000–$8,000
- Whole-home rewiring: $8,000–$25,000+ for a 2,000-3,000 sq ft house
Older homes with plaster walls, masonry, or tight spaces run higher because accessing wire routes takes longer. New construction or homes with open basement access cost less. Get at least three written quotes; legitimate electricians will visit your home to assess before giving a price.
Labor typically accounts for 60–70% of the total cost. Materials (wire, breakers, outlets, conduit) make up the rest. Permit and inspection fees usually add $200–$600, depending on your jurisdiction.
The Permitting and Inspection Reality
You cannot legally skip permits for a panel upgrade or rewire in most areas—and you shouldn't want to. A permitted job comes with inspection stamps that protect your home's resale value and keep you compliant with code.
Permits also ensure the electrician is licensed and bonded. An unlicensed operator might save you 20% upfront, but if something fails or burns, your homeowner's insurance won't cover it. That $3,000 savings evaporates fast.
Expect the inspection process to take 2–4 weeks once work is submitted. Some jurisdictions allow final inspection same-day; others queue them weeks out. Ask your electrician what the timeline looks like before hiring.
Finding and Comparing Qualified Electricians
When vetting electricians for a panel or rewiring job, verify licensing first. Call your state or local licensing board to confirm active status and check for complaints. Ask for references from recent panel upgrades specifically—not just a general list of past clients.
Request a detailed scope of work in writing, not a verbal handshake. It should specify wire gauge, breaker brands, GFCI/AFCI placement, and whether permits are included in the quoted price.
Mercoly lets you compare trusted electrical contractors in your area, see their credentials, and read verified customer reviews—all without juggling phone calls to a dozen shops.
Frequently Asked Questions
Q: How long does a full home rewire take? A complete whole-home rewire typically takes 3–7 days depending on house size and complexity. Partial rewires or panel-only upgrades finish in 1–3 days.
Q: Can I live in my home during a rewire? Yes, but you'll lose power to sections of the house during work. Many electricians schedule rewires to complete within a day or two to minimize disruption; ask upfront how they'll manage power access.
Q: What's the difference between Romex and conduit? Romex (NM cable) is the standard for most residential interior wiring and is less expensive; conduit is rigid metal or plastic tubing that offers extra protection and is required in certain areas like basements or outdoor runs. Code requirements vary by location and application.
Start by getting three detailed quotes from licensed electricians in your area to understand your specific costs and timeline.