How Much Does It Cost to Rewire a House in NJ? 2026 Numbers
A full house rewire runs roughly $5 to $17 per square foot, which puts most New Jersey homes between $10,000 and $34,000. A 1,500 square foot house lands somewhere around $7,500 to $25,500; a 3,000 square foot house can reach $51,000. Knob and tube replacement sits higher, $12,000 to $35,000, because it almost always drags a service upgrade along with it.
That is an enormous spread, and the spread is the useful part. Here is what actually moves the number, and the more important question underneath it: whether you need a rewire at all. Most people who call us asking for one do not.
What a rewire costs by house size
First: do you actually need one?
This is the section that saves people the most money, so it goes before the price breakdown.
A whole-house rewire is driven by what is physically in the walls, not by the age of the house. These are the findings that genuinely justify it:
- Knob and tube still in service. Not just present in the attic and abandoned — actually carrying load. It has no ground, its insulation embrittles, and insurers increasingly will not write a policy over it.
- Cloth-insulated wire that crumbles at the terminations. Common in New Jersey homes wired from the 1930s through the 1950s. If the insulation falls off the conductor when you flex it inside the box, the wire behind the wall is in the same condition.
- Aluminum branch wiring. Used in homes built roughly 1965 to 1973. It is not automatically a rewire — approved connectors at every device is often the accepted remediation — but on a large house with many devices the cost gap narrows.
- Rodent or water damage across multiple runs. One chewed cable is a repair. A colony that has worked the whole attic is not.
What does not justify a rewire, despite what people are often told:
- An old panel. That is a panel replacement, $2,000 to $7,000, not a rewire.
- Two-prong outlets. Sometimes a ground already exists in the box and was never used. Where it genuinely does not, a GFCI on the circuit is a code-recognized answer that costs a fraction of rewiring.
- Not enough outlets. That is adding circuits.
- One room that keeps tripping. That is a fault to be found, not a house to be rewired.
What actually drives the price
Almost never the wire. Copper is a line item, not the line item. The cost is access and repair.
| Factor | Cheaper end | Expensive end |
|---|---|---|
| Access above and below | Walk-up attic and unfinished basement | Finished attic, slab or crawl space you cannot work in |
| Wall construction | Drywall, easy to cut and patch | Plaster and lath, which does not patch invisibly |
| Occupied or empty | Empty between owners or during a renovation | Occupied, working room by room around a family |
| Number of stories | Ranch, one level to fish | Two or three stories, every run crosses a floor |
| Panel condition | Modern panel with capacity | Fuse box or obsolete panel that must be replaced first |
| Finish work | You are painting anyway | Plaster repair and repainting throughout |
On top of the labor and materials, expect permits in the range of $250 to $900 and inspection fees of roughly $100 to $200, depending on your township. Plaster and drywall repair is its own number, commonly $300 to $1,500 or more, and painting is usually quoted separately.
Partial rewiring, which is what most people need
A room-by-room approach is far more common than a full rewire, and it is how most of these projects should start. Typical ranges by area:
| Area | Typical range | Why it varies |
|---|---|---|
| Kitchen | $500 – $3,400 | Dedicated small-appliance circuits, GFCI and AFCI requirements, appliance loads |
| Bathroom | $200 – $2,600 | Dedicated circuit, GFCI, exhaust fan, whether tile has to come off |
| Bedroom | $650 – $3,900 | Number of outlets, AFCI protection, access from above or below |
| Basement | $2,500 – $25,500 | Unfinished is cheap. A finished basement with a low ceiling is the opposite |
The sensible sequence, in our experience: get the panel right first if it needs it, then do the circuits that carry real load or that code now requires protection on, then do the rest as rooms get renovated. A staged rewire spread over a kitchen remodel and a bathroom remodel costs a fraction of a single whole-house project, because the walls are already open for someone else’s reasons.
What we find once the walls are open
Every older New Jersey house has some of this, and none of it is unusual. It is worth knowing in advance so it does not read as a surprise upcharge:
- Junction boxes buried inside the wall and drywalled over, which are not permitted and have to be made accessible.
- Splices made with tape rather than connectors.
- Neutrals shared between circuits, which breaks AFCI protection and can overload the shared conductor.
- Back-stabbed devices, where the wire was pushed into the back of the outlet rather than landed on a screw. These are the source of a large share of the loose connections and arcing we find.
- Missing cable clamps and bushings where cable enters a box.
- Original grounding electrode systems that were never brought up to current requirements.
We show you what we find rather than describing it after the fact.
Permits and inspection in New Jersey
Rewiring requires a permit filed with your township construction office and an inspection on completion, and there is a rough-in inspection before anything is closed up. That mid-project inspection is not a formality; it is the only time anyone can see the work, and skipping it means opening the walls again.
We file the permit, meet the inspector at both stages, and hand you the signed approval when it clears. That document is what your insurer wants and what a buyer’s attorney will ask about at closing. Unpermitted rewiring is one of the more expensive things to discover mid-transaction.
What we charge to look at it
A rewire is quoted, not billed as a service call. If you want it assessed first — whether what you have is a rewire, a panel, or two circuits and a fault — a service call with initial diagnosis is $259.99. A service call with one small repair such as an outlet or switch is $229.99. After-hours emergency calls are $389.99. If the assessment turns into the job, you get a written number before anything starts.
One honest note on quotes: if a contractor gives you a whole-house rewire price over the phone without seeing the attic, the basement and the panel, that number is a guess. The variables in the table above are the entire job.
Frequently asked questions
How much does it cost to rewire a house?
Roughly $5 to $17 per square foot, which puts most homes between $10,000 and $34,000. A 1,000 square foot house runs about $5,000 to $17,000, a 1,500 square foot house $7,500 to $25,500, and a 3,000 square foot house up to $51,000. Knob and tube replacement sits higher, $12,000 to $35,000, because it usually forces a service upgrade as well.
Does my house actually need to be rewired?
Usually not. A rewire is justified by what is physically in the walls: knob and tube still carrying load, cloth-insulated wire that crumbles at the terminations, aluminum branch wiring on a large house, or rodent or water damage across multiple runs. An old panel is a panel replacement, not a rewire. Two-prong outlets can often be solved with GFCI protection. Not enough outlets means adding circuits. Most calls that start as a rewire end as one or two new circuits.
What makes rewiring expensive?
Access and repair, almost never the wire itself. A walk-up attic and unfinished basement is the cheap case. A finished attic, a slab, plaster and lath walls, an occupied house worked room by room, and multiple stories each push the number up. Plaster does not patch invisibly, which is why an older home can cost three times what an identical square footage in drywall does.
How much does it cost to rewire one room?
Partial rewiring is far more common than a whole house. A kitchen typically runs $500 to $3,400 because of the dedicated small-appliance circuits and GFCI and AFCI requirements. A bathroom is $200 to $2,600, a bedroom $650 to $3,900, and a basement anywhere from $2,500 to $25,500 depending on whether it is finished.
Do I need a permit to rewire a house in New Jersey?
Yes, filed with your township construction office, and there is a rough-in inspection before anything is closed up as well as a final inspection. That mid-project inspection is the only time anyone can see the work, so skipping it means opening the walls again. Permits typically run $250 to $900 and inspection fees $100 to $200. Unpermitted rewiring is expensive to discover during a sale.
How long does it take to rewire a house?
A single circuit in accessible space is often same-day. A whole-house rewire is usually one to three weeks depending on size, access and whether the house is occupied. Working around a family adds time, because you can only open so much at once. The staged approach, doing rooms as they get renovated, spreads it out and costs less overall.
Is it cheaper to rewire during a renovation?
Considerably, and it is the single biggest saving available. If the walls are already open for a kitchen or bathroom remodel, most of the cost of a rewire, which is access and patching, has already been paid for by someone else. Sequencing electrical work to ride along with renovations you were doing anyway is the cheapest way to bring an older house up to date.
Sources
- Rewiring cost per square foot, totals by house size and partial rewire ranges — HomeGuide
- National Electrical Code, AFCI and GFCI branch circuit requirements — NFPA 70
- Aluminum branch circuit wiring hazards and repair methods — U.S. Consumer Product Safety Commission
- New Jersey Uniform Construction Code, electrical subcode permits and inspections — NJ Division of Codes and Standards
Serving Central and North Jersey
We rewire and add circuits in homes across Monmouth, Middlesex, Somerset, Union, Morris and Essex counties, out of our Hazlet and Bridgewater offices. See our page on new circuits and wiring, our guide to what wiring installation involves in an existing house and Federal Pacific and Zinsco panels, or get on the schedule.