A homeowner in Land Park called us last spring because the lights in her hallway dimmed every time the microwave ran. She figured it was a quirk of an old house, the kind of thing you learn to live with. It wasn’t. Behind the plaster was original cloth-wrapped wiring from the 1940s, brittle and ungrounded, feeding a house that now runs two TVs, a home office, and a heat pump. That flicker was the house asking for help.
If you own an older home in Sacramento, some version of this story might sound familiar. Rewiring a whole house is a big project, and nobody wakes up excited to pay for wiring they will never see. So let’s talk honestly about what it costs, how to tell when it is actually necessary, and what the week or two of work really looks like. We have rewired homes all over Sacramento, Roseville, and Folsom, and the more you understand going in, the less stressful it is.
Table of Contents
First, the money question
You want a number, so here is a straight one. Most whole-house rewires land between $10,000 and $30,000, and for a typical mid-size Sacramento home you are usually looking at somewhere around $12,000 to $18,000. Measured by the foot, complete rewiring tends to run $6 to $10 per square foot, and it climbs toward the higher end when walls have to be opened and patched.
That spread is wide for a reason, and it is worth understanding why rather than just fixating on the low end. Labor is the biggest piece of the bill, often up to 70% of the total. An electrician cannot rewire a house from a laptop. Someone is physically fishing new copper through walls, floors, and ceilings, and older homes fight back at every turn.
Here is roughly how the range breaks down for Sacramento homes:
| Home & scope | Typical cost | What is driving it |
|---|---|---|
| Small home, open access, partial rewire | $8,000 – $12,000 | Crawlspace or attic access, fewer walls opened |
| Mid-size home, full rewire | $12,000 – $18,000 | Whole-house copper, new grounding, some drywall work |
| Larger or plaster-walled home, full rewire | $18,000 – $30,000+ | Plaster and lath, panel upgrade, extensive patching |
One thing we will always tell you up front: the wiring often is not the only thing that needs attention. If your home still runs a 100-amp panel or an old fuse box, a rewire is the natural moment to handle that too. It is cheaper to do them together than to come back later, and we will fold it into one honest estimate. Our panel upgrade work pairs naturally with a rewire for exactly this reason.
How to tell whether you actually need it
Not every old house needs a full rewire, and we are not going to pretend otherwise. Some homes just need a few circuits refreshed. So before you brace for a five-figure project, look for the signals that separate “keep an eye on it” from “call someone this month.”
The everyday warning signs are the ones you can notice yourself. Lights that flicker or dim when an appliance kicks on. Breakers that trip for no obvious reason, or a fuse box you are still feeding coins of your patience into. Outlets or switch plates that feel warm. A faint buzzing behind the wall. The smell of hot plastic, even faintly, which you should never ignore. Two-prong outlets throughout the house are another tell, because they usually mean there is no ground.
Then there are the signs hiding inside the walls, and these matter more than most people realize:
- Knob-and-tube wiring. Common in Sacramento homes built before the 1950s. It uses ceramic knobs and tubes to run single wires, and it has no ground. It was fine for its era and is not built for ours.
- Aluminum wiring. Widely installed in the 1960s and 70s as a cheaper alternative to copper. Over decades it expands, contracts, and oxidizes, which loosens connections. Homes with aluminum branch wiring are far more prone to developing fire-hazard conditions than copper-wired homes.
- Cloth-insulated wiring. The brittle, fabric-wrapped wire we found in that Land Park house. The insulation crumbles with age and heat.
- A fuse box instead of breakers. Not automatically dangerous, but usually a sign the whole system predates modern electrical demand.
If you are seeing the everyday symptoms, start with a diagnosis rather than assuming the worst. Sometimes a targeted repair buys you years. Our electrical troubleshooting exists for exactly that moment, when you know something is off but not how deep it goes.
Why Sacramento’s older neighborhoods come up so often
This is not a coincidence of bad luck. Sacramento has a deep stock of homes built from the 1940s through the 1970s, spread across neighborhoods like Land Park, Curtis Park, Tahoe Park, and older pockets of Carmichael and Citrus Heights. A lot of them still carry their original wiring, or a patchwork of it after decades of well-meaning additions.
Two local realities push these homes toward a rewire. The first is heat. Our summers routinely push past 100 degrees, and central AC pulls hard on a system that was designed when a window unit was a luxury. Aging wiring runs hotter under that load, and heat is what turns old insulation brittle. The second is how much more electricity a modern household simply uses. The house that once ran a radio and a few lamps now runs a home office, an EV charger, a heat pump, and a kitchen full of appliances.
There is also a paperwork angle that catches Sacramento homeowners off guard, especially at resale. Older homes frequently contain unpermitted electrical work from a previous owner, a sub-panel here, a DIY circuit there. That work tends to surface during an inspection, and it may need to be brought up to current code retroactively. A rewire is often the clean way to close that chapter for good. If you want the local permitting details, we wrote a separate guide on electrical permits in Sacramento.
What the actual week looks like
People picture rewiring as their house torn open for a month. It is usually less dramatic than that. A whole-house rewire on a typical 1,500 to 2,000 square foot Sacramento home generally takes five to ten working days. Smaller or partial jobs can wrap in one to three.
Here is the honest rhythm of it. We start with a walkthrough and a plan, then pull the permit through your jurisdiction, whether that is the City of Sacramento, Sacramento County, or the City of Folsom depending on your address. The bulk of the work is the rough-in, running new copper to every outlet, switch, and fixture, and establishing proper grounding throughout. Yes, we open some walls to do it. Good electricians open as few as possible and cut cleanly where they must.
You do not have to move out for most rewires. We often work room by room and keep power restored to livable parts of the house at the end of each day. There is dust, there is some noise, and there are a couple of stretches where the power is off while we make connections. After the new wiring passes inspection, we patch, you paint, and the house goes quiet again, this time because everything is working the way it should.
A quick word on doing it right
Rewiring is the kind of work you want done once, correctly, by someone who will still be around if a question comes up in a year. A few things worth insisting on, whoever you hire:
- A real C-10 license. You can verify any electrical contractor for free at cslb.ca.gov. We are C-10 licensed and insured, and we would rather you check than take our word for it.
- Permits pulled every time. Rewiring without a permit can stall a home sale and complicate an insurance claim. It is not a corner worth cutting.
- A local team that stands behind the work. We are based here, not routing the job to an out-of-town crew you will never see again.
- Straight talk about scope. If part of your wiring is fine, we will say so. No band-aid repairs, and no talking you into copper you do not need.
Because we handle electrical, solar, and EV charging under one roof, a rewire is also the smart moment to plan ahead. If an EV charger or solar is anywhere in your future, running the groundwork now while the walls are open saves you paying twice. Our residential electrical team looks at the whole picture, not just the wire in front of us.
The short version
Rewiring an older Sacramento home usually costs $12,000 to $18,000, takes about one to two weeks, and becomes necessary when you have knob-and-tube, aluminum, or crumbling cloth wiring, or when the everyday flickers and warm outlets stop being quirks and start being warnings. If you are not sure which situation you are in, that is genuinely the most common place to be, and it is an easy thing to find out.
We are happy to come look, tell you honestly whether you need a full rewire or just a repair, and put real numbers on paper. Request a free estimate from Under the Sun Solar & Electric, or call us at 916-899-3062. We serve Sacramento, Roseville, Rocklin, Folsom, Elk Grove, Lincoln, Citrus Heights, and Rancho Cordova, and we will give you the straight version either way.
