Rewiring a house in New Jersey costs $5,500–$25,000+ in 2026, depending on the home's size, the type of existing wiring being replaced, access conditions, and whether a panel upgrade is needed at the same time. Most NJ homeowners doing a full rewire of a typical 1,200–2,000 sq ft home spend $8,000–$15,000 for a complete, permitted job.
That's a wide range, and the reasons matter. A 1920s Jersey City brownstone with knob-and-tube wiring behind plaster walls is a fundamentally different job than a 1970s ranch in Cedar Grove with aluminum wiring and accessible attic space. Here's what drives the cost and what to expect at every stage.
Rewiring Cost by Home Size
The simplest way to estimate rewiring cost is by square footage. In New Jersey, expect to pay $4–$10 per square foot for a complete rewire, including materials, labor, permits, and inspections. The range depends on access conditions and wiring complexity.
- Under 1,200 sq ft (small ranch, condo unit): $5,500–$9,000
- 1,200–1,800 sq ft (typical colonial, split-level): $8,000–$14,000
- 1,800–2,500 sq ft (larger colonial, bi-level): $12,000–$18,000
- 2,500–3,500 sq ft (large home, multi-story): $16,000–$25,000+
- Multi-family (2-3 units): $15,000–$35,000+ depending on unit count and shared services
These ranges assume standard residential rewiring with Romex (NM-B) cable in accessible framing. If your home requires extensive conduit runs, plaster demolition, or is a historic property with preservation requirements, costs will be at the higher end or above these ranges.
What Drives the Cost Up (or Down)
Square footage is the starting point, but several factors can push your rewire cost significantly in either direction:
Access conditions are the biggest variable. If your electrician can access walls through an open basement ceiling and an unfinished attic, the job is vastly easier and cheaper than fishing wire through finished walls, plaster ceilings, and enclosed soffits. Open access can cut labor hours in half compared to a fully finished home.
Type of existing wiring matters. Knob-and-tube wiring (pre-1950s homes) is more labor-intensive to remove than aluminum wiring (1960s–1970s homes). Knob and tube often has to be traced through unusual paths — original electricians didn't follow the same routing conventions we use today. Aluminum rewires are typically more straightforward because the wiring follows standard paths.
Panel upgrade included or separate. Most homes being rewired also need a panel upgrade — you're unlikely to be rewiring a home that already has a modern 200-amp panel. If the panel upgrade is done simultaneously (recommended), it adds $2,800–$4,500 to the rewire cost but saves a separate mobilization and permit cycle later.
Number of circuits being added. A rewire isn't just replacing old wire with new wire. Modern NEC code requires dedicated circuits for kitchens, bathrooms, laundry, HVAC, and outdoor receptacles that older homes don't have. A 1940s home with 6 circuits might need 20+ circuits to meet current code. More circuits means more wire, more breakers, and more labor.
Finish work. Rewiring requires accessing wall and ceiling cavities. In some homes this can be done with minimal patching; in others, significant drywall or plaster repair is needed afterward. Most electricians don't include finish work (painting, skim coating) in their rewire quotes — clarify this upfront.
When a Full Rewire Is Actually Necessary
Not every old home needs a complete rewire. Here's when it's genuinely necessary versus when targeted upgrades make more sense:
Full rewire is necessary when:
- Your home has knob-and-tube wiring and your insurer is requiring removal for coverage
- Your home has aluminum branch wiring that has caused overheating at connections
- You're doing a major renovation that opens walls anyway (the cheapest time to rewire)
- An electrical inspection has identified widespread code violations or deteriorated wiring insulation
- You're buying an older home and the inspection report flags the wiring as a systemic issue
Targeted upgrades may be sufficient when:
- Your wiring is copper and in good condition, but your panel needs upgrading
- You need additional circuits for new appliances or an EV charger but the existing wiring is sound
- Only one section of the home has problematic wiring (e.g., a finished attic addition with substandard work)
A good electrician will be honest about whether you need a full rewire or whether a panel upgrade and selective circuit additions will solve your actual problem for less money.
The NJ Rewiring Process: What to Expect
A whole-home rewire in New Jersey follows a predictable sequence. Here's what happens and how long each phase takes:
Proposal and planning (1 week). Your electrician walks the home, identifies access points, determines circuit count, and provides a written quote. For larger homes, this may involve a second visit.
Permit (1–3 weeks). An electrical permit is required for any rewiring work in NJ. The electrician submits plans to your local construction office showing the new circuit layout.
Rough wiring (2–5 days). The electrician runs all new wiring through walls, ceilings, and floors. This is the most labor-intensive phase. Old wiring may or may not be removed at this stage — in some homes it's easier to abandon the old wiring in place and run new wire alongside it.
Rough inspection. Before walls are closed up, the municipal inspector verifies the new wiring meets code. This is a critical checkpoint — any issues caught here are much easier to fix before drywall goes up.
Panel work (1 day). New circuits are connected to the panel (or new panel, if upgrading simultaneously). Old circuits are decommissioned.
Device installation (1–2 days). New outlets, switches, GFCI/AFCI receptacles, and cover plates are installed throughout the home.
Final inspection. The inspector returns to verify everything — completed wiring, proper grounding, AFCI/GFCI protection where required, correct labeling. Once this passes, you're done.
Total timeline: 3–6 weeks for a typical single-family home. Larger or more complex homes may take longer.
How to Get an Accurate Rewire Quote
Rewiring quotes should always be based on an in-person assessment — not a phone estimate. The difference between an easy-access ranch and a closed-up Victorian is too significant to quote sight unseen.
When comparing quotes, make sure each one includes the same scope. Specifically, confirm whether the quote includes:
- Panel upgrade (if needed)
- All permits and inspections
- AFCI breakers where required by current NEC code
- New GFCI outlets in kitchens, bathrooms, laundry, and outdoors
- Smoke detector circuits (NJ requires hardwired, interconnected smoke detectors in most rewire scenarios)
- Patching access holes (or explicit exclusion of finish work)
A quote that's missing any of these items isn't actually cheaper — it's just less complete.
Get a Rewire Estimate for Your NJ Home
Malfettone Electric has rewired homes across Hudson, Essex, and Bergen Counties — from 1920s Jersey City brownstones to 1960s suburban colonials. We give honest assessments: if your home doesn't need a full rewire, we'll tell you what it actually needs and quote that instead.
Call us at (848) 294-1739 or request a free estimate online. We'll walk your home, assess your wiring, and give you a written flat-rate quote with a clear scope of work.