Residential Electrical Service

Whole-House Rewiring in Southern NH & the MA Border

Old wiring doesn’t fail politely. WJW Electric rewires older homes with safe, grounded, code-compliant circuits — phased so you can keep living in the house while it happens.

🏠

A whole-house rewire is the biggest electrical job most homeowners will ever do, and the one that changes the most. It replaces aging, ungrounded, patched-together wiring with modern circuits that are safe, grounded, properly sized, and built for how a house actually gets used now. WJW Electric rewires homes across Southern New Hampshire and the Massachusetts border towns.

Billy Webber is a master electrician licensed in both Massachusetts and New Hampshire, and he also holds an unrestricted Construction Supervisor License — which genuinely matters on a rewire, since this work regularly touches framing, plaster, and permit-heavy territory that most electricians have to sub out. Free estimates, and an honest read on whether you need a full rewire or something smaller.

What Does Whole-House Rewiring Involve?

Whole-house rewiring replaces the existing branch circuits throughout a home with new grounded wiring, new boxes, outlets, and switches, tied into a panel that can support them. It typically includes replacing knob-and-tube or ungrounded cable, adding the dedicated circuits modern appliances require, and updating the service or panel where needed — all permitted and inspected.

The goal isn’t just to swap wire. It’s to end up with a house where every outlet is grounded, the kitchen and bath circuits meet current code, there are enough circuits that nothing trips when two appliances run together, and nobody has to wonder what’s buried behind the plaster. Done once, done right, and documented.

Signs Your Home Needs Rewiring

Rarely one dramatic failure — usually several of these at once:

Two-prong outlets throughout — the clearest sign of ungrounded circuits.
Cloth-covered or brittle wiring that crumbles when it’s moved.
Extension cords everywhere because there aren’t enough outlets.
Your insurer or a home inspector flagged the wiring.

Knob-and-tube wiring still active in the attic, walls, or basement.
Breakers trip constantly because too much is sharing too few circuits.
Aluminum branch wiring from the mid-1960s and 70s.
Warm outlets, scorch marks, buzzing, or a burning smell — stop using the circuit and call immediately.

Full Rewire or Partial? The Honest Answer

Not every old house needs a complete rewire, and quoting one when it isn’t necessary is how homeowners get taken advantage of. Plenty of homes have had partial updates over the decades — a kitchen redone in the 90s, a bathroom in the 2000s — and what’s left is an attic run and a few original circuits. A partial rewire handles that for a fraction of the cost.

A full rewire makes sense when the old wiring is everywhere, when you’d be opening the same walls repeatedly to do it piecemeal, or when you’re already renovating and the walls are open anyway. That last one is the best-value moment there is — if you’re gutting a floor, rewiring it costs dramatically less than it will after the drywall goes back up.

Billy walks the house before quoting anything and tells you which situation you’re actually in. Sometimes the answer is “you need less than you thought.”

Rewiring and Your Panel

These two jobs travel together. A home that needs rewiring almost always has a panel from the same era — a fuse box, an undersized 100-amp service, or a panel with no room left. New grounded circuits need somewhere to land, so an electrical service upgrade is frequently part of doing a rewire properly rather than an add-on.

It’s also the natural moment to plan ahead. If an EV charger, a hot tub, or a heat pump is anywhere in your future, running the capacity for it while the walls are open costs a fraction of adding it later. Worth raising at the estimate even if it’s a few years out.

What the Rewiring Process Looks Like

Walk the house.

We trace what’s original, what’s been replaced, and what condition the panel is in — attic to basement.

Scope and estimate.

A clear read on full versus partial, what it costs, how long it takes, and where patching will be needed.

Permit.

Rewiring is permitted and inspected in both MA and NH. We pull it and coordinate the inspector.

Phased installation.

New circuits are fished through existing cavities, area by area, so the house stays livable and power comes back on at the end of each day.

Panel and service.

New circuits are landed in a panel that can support them, upgrading the service if the job calls for it.

Inspection, labeling, and cleanup.

The inspector signs off, circuits are labeled legibly, and you get the documentation for your insurer and your future buyer.

The question everyone asks first is “do we have to move out?” Almost always no. Rewires are phased around living in the house — that’s the normal way this is done.

Why Homeowners Trust WJW Electric With a Rewire

A rewire touches every room in the house. It’s worth knowing exactly who’s doing it.

Unrestricted Construction Supervisor — CS-121037. Matters most on this job: rewires touch framing and plaster, and most electricians have to bring in a second contractor for it.
Honest scoping — partial when partial is enough, full when it genuinely saves you money.
Permitted, inspected, and documented for your insurer and at resale.

Whole-House Rewiring FAQs

Do I have to move out while my house is rewired?

Usually not. Most rewires are phased so the home stays livable, with power restored to the areas you need at the end of each working day. Occupied rewires are the normal case. A full gut renovation is a different situation, and we’ll say so if that’s where you are.

How long does it take to rewire a house?

It depends on size, access, and how much is being done. A partial rewire of a floor or a few circuits can take a few days; a full rewire of an older multi-story home commonly runs one to three weeks including inspections. You’ll get a schedule with the estimate.

Will rewiring destroy my walls?

Less than most homeowners expect. New wiring gets fished through existing wall and ceiling cavities using attics, basements, and closets as access, so openings are targeted rather than wholesale. Some patching is normal, and we tell you up front where it’ll be.

Does rewiring include a new electrical panel?

Often yes. Homes that need rewiring usually have an older panel or fuse box that can’t support properly grounded modern circuits, so an electrical service upgrade is done as part of the job. We’ll tell you up front whether yours needs it.

Can you rewire just part of the house?

Yes, and sometimes it’s the right call. If the old wiring is confined to one floor, an attic, or a handful of circuits, a partial rewire solves it for far less. We walk the house first and tell you honestly which one you’re looking at.

Does a rewire need a permit?

Yes. Rewiring requires an electrical permit and inspection in both Massachusetts and New Hampshire. A licensed electrician pulls the permit and meets the inspector — and that signed-off paperwork is what protects you at resale and with your insurance carrier.

Whole-House Rewiring Across Southern NH and the MA Border

Based in Pepperell, MA — minutes from the state line — WJW Electric rewires older homes throughout Nashua, Hollis, Brookline, Milford, and Amherst in New Hampshire, plus Pepperell and the neighboring Massachusetts border towns. See all areas we serve →

Thinking About Rewiring?

Start with an honest walkthrough and a clear estimate from a master electrician licensed in both states.

(978) 732-8708