A “heavy-up” is an electrical service upgrade where a licensed electrician replaces your old panel, service wire, and grounding to raise your home’s capacity, usually from 100 to 200 amps. In Sacramento, a typical heavy-up runs $2,000-$2,800 all-in, including permit, materials, and labor. It is the upgrade most older Sacramento homes need before adding central AC, an EV charger, or new solar-ready circuits.
If you have been quoted a “heavy-up” and were not sure what you were paying for, you are not alone. It is contractor shorthand for a service upgrade, and it comes up constantly in the older neighborhoods we serve. We are Old Town Electric, a family-owned, C-10 licensed electrical contractor based right here in Sacramento, and we have been sizing up and upgrading panels across the region for more than 10 years. In this guide we will explain exactly what a heavy-up electrical service upgrade is, what it costs in Sacramento, when you actually need one, and how permits and SMUD rebates factor in. No jargon, no pressure, just the straight answers our neighbors ask us for every week.
What Is a Heavy-Up Electrical Service Upgrade?
A heavy-up is an electrical service upgrade that increases the amount of power your home can safely draw from the grid. Electricians use the term “heavy-up” because you are literally increasing the electrical “weight” your service can carry.
A true heavy-up is more than swapping a breaker box. It usually includes three things working together:
- The service panel – the main breaker box, replaced with a higher-capacity unit (commonly a 200-amp panel).
- The service entrance wire – the heavier conductors that carry power from the meter into the panel, sized to match the new amperage.
- The grounding and bonding – upgraded to meet current code so the whole system is safe.
Most heavy-ups in Sacramento take a home from 100 amps to 200 amps. Some older homes still run on 60 or 100 amps, which was plenty when the house was built in the 1960s but falls short for a modern all-electric household. If your project only swaps the panel itself and reuses the existing service wire, that is technically a panel replacement. A heavy-up increases the service capacity, which is the part that actually lets you run more.
How Much Does a Heavy-Up Cost in Sacramento?
A heavy-up electrical service upgrade in Sacramento typically costs $2,000-$2,800 all-in for a straightforward 100-to-200-amp upgrade, including the permit, materials, and labor. Across the broader market, panel and service upgrades range from about $1,800 to $3,500 depending on complexity, according to 2026 Sacramento contractor pricing data.
Here is a realistic breakdown of what drives the number in our area:
| Scenario | Typical Sacramento Cost |
|---|---|
| Straightforward 100 to 200 amp heavy-up, panel stays in place | $2,000 – $2,800 |
| Upgrade requiring grounding and service-wire brought to current code | $2,500 – $3,500 |
| Panel relocation (moving the panel to a new spot) | Add $1,500 – $4,000 |
| City or county permit | $150 – $625 |
Underground service upgrades usually cost more than overhead ones, because the work and utility coordination are more involved. The single biggest cost swing is panel relocation. If your existing panel is in an awkward spot and needs to move, that adds real labor and requires SMUD to temporarily pull the meter. We always give you a free, itemized quote up front so you know exactly which of these scenarios applies to your home, with no hidden fees.
For a deeper cost breakdown by amperage and panel brand, see our companion guide on electrical panel upgrade cost in Sacramento.
Why Do So Many Sacramento Homes Need a Heavy-Up?
Sacramento and its inner suburbs are full of homes built between the 1950s and 1980s. Neighborhoods like Citrus Heights, Carmichael, Fair Oaks, and Orangevale are dominated by that vintage, and many still carry the original 60-amp or 100-amp service they were built with. That capacity was fine for a mid-century household. It is not fine for how we live now.
A few things unique to our region push homeowners toward a heavy-up:
- Triple-digit summers. Sacramento regularly hits 100-plus degrees. Homeowners are adding central AC, heat pumps, and mini-splits, and those loads stack up fast on an old panel. Undersized service is the reason breakers trip on the hottest afternoons.
- EV adoption. Sacramento’s EV numbers keep climbing, and a Level 2 home charger draws a lot of power. Many older homes simply do not have the panel capacity to add one safely without a heavy-up first.
- Solar-ready circuits and electrification. Homeowners planning ahead want the headroom for future circuits, whether that is a new subpanel, a workshop, or an induction range. A 200-amp service gives you room to grow.
When you combine an EV charger, central AC, and a couple of other modern loads, an NEC load calculation often lands past what a 100-amp service can carry. That calculation, not a guess, is how we determine whether you truly need 200 amps.
What Are the Signs You Need a Heavy-Up?
You do not always need an electrician to spot the early warning signs. If several of these sound familiar, it is worth getting your service evaluated:
- Breakers trip often, especially when the AC and another appliance run at once.
- You have a fuse box or a panel labeled 60 or 100 amps.
- Lights dim or flicker when large appliances kick on.
- You rely on power strips and extension cords because you are short on circuits.
- You are planning a big addition – an EV charger, central AC, a hot tub, an ADU, or a kitchen remodel.
- Your panel is a known problem brand (some older Zinsco and Federal Pacific panels have documented safety issues) or shows rust, scorching, or a burning smell.
That last one is a safety issue, not just a capacity issue. If you ever smell burning or see scorch marks at the panel, call a licensed electrician right away. We offer 24/7 emergency service for exactly these situations.
Do You Need a Permit for a Heavy-Up in Sacramento?
Yes. A service upgrade changes the main electrical service, so it always requires a permit and an inspection in the Sacramento area. This is a good thing. It protects you, your home, and the next owner, and it keeps the work documented for resale.
Which office issues the permit depends on where you live:
- Inside City of Sacramento limits, permits go through the city’s building division and typically run $150-$625 depending on the scope of work.
- In unincorporated, county-served communities like Citrus Heights, Carmichael, Fair Oaks, and Orangevale, the permit is handled by Sacramento County, which uses a separate permit portal from the city.
- Charter cities such as Folsom and Roseville run their own building departments with their own fees and processes.
A heavy-up also requires coordination with your utility, SMUD, to disconnect and reconnect the meter safely. We handle the permit paperwork, the SMUD coordination, and the inspection scheduling as part of the job, so you are not stuck navigating three different offices.
One more thing worth knowing: older Sacramento homes sometimes have unpermitted electrical work from a previous owner, such as a DIY subpanel or an addition circuit that was never inspected. That often surfaces during a heavy-up or a home sale. We can help bring that older work up to current NEC code and get it properly permitted, so it does not become a problem at resale.
Are There SMUD Rebates for a Heavy-Up?
There can be, especially if you pair the upgrade with electrification. SMUD’s Go Electric Bonus Package pays up to $500 per eligible circuit, including your panel upgrade, an EV charger circuit, a range or cooktop circuit, and a dryer circuit, for a combined maximum of up to $2,000 when you upgrade and add all-electric circuits at the same time.
If your main goal is EV charging, SMUD’s Charge@Home program offers up to $900 toward a Level 2 charger installation and any required electrical work, including up to $250 toward the charger itself. Because a heavy-up is often the first step that makes home charging possible, timing your upgrade alongside an EV charger install can help you capture more than one incentive.
Rebate amounts and eligibility change, so we always point customers to SMUD’s current program pages before counting on a specific dollar figure. When we plan an EV charger installation or a new circuit installation alongside your heavy-up, we will flag which rebates may apply to your specific project.
Can You Do a Heavy-Up Yourself?
Honestly, no, and we would tell you that even if it meant turning down work. A service upgrade involves the main service conductors, the meter, and the grounding system. That is high-voltage, utility-connected work that must be permitted, inspected, and performed by a licensed electrician in California. Getting it wrong is a genuine fire and shock hazard, and unpermitted service work will fail inspection and can derail a home sale.
This is different from a small project like swapping a light fixture. A heavy-up ties directly into SMUD’s system and your home’s entire electrical backbone. It is one of the clearest cases where hiring a licensed pro is not just smart, it is required.
What Should You Look for in a Heavy-Up Electrician?
A service upgrade is a job you want done right the first time. Here is what to check before you hire anyone in the Sacramento area:
- A valid California C-10 license. You can verify any contractor’s license, including ours (Lic. #1099728), for free on the California CSLB website at cslb.ca.gov.
- Proof of insurance. Licensed and insured protects you if something goes wrong on your property.
- They pull the permit. A pro who “skips the permit to save you money” is a red flag, not a bargain.
- Transparent, itemized pricing. You should get a free quote with no hidden fees before work starts.
- Local track record. Look for real, verifiable reviews from your area.
For what it is worth, our customers across Sacramento, Citrus Heights, and Fair Oaks have left us more than 226 reviews at a 4.9 out of 5 average, and we are BBB A-rated. What they mention most is not the wiring, it is that we showed up on time, communicated clearly, and cleaned up after ourselves. On a project this involved, those small things matter.
Is a Heavy-Up Worth It?
For most older Sacramento homes, a heavy-up electrical service upgrade is what makes modern life possible – central AC that does not trip the panel, a home EV charger, and the headroom for whatever you add next. A typical Sacramento heavy-up runs $2,000-$2,800 all-in, it requires a permit and an inspection, and pairing it with electrification can unlock up to $2,000 in SMUD rebates. It is an investment, but it is also a safety and resale upgrade that pays you back for years.
If you are not sure whether your home needs 200-amp service, the honest first step is a load calculation, and we are happy to walk you through it. Learn more about our panel upgrade and repair services, or reach out and we will take a look.
Have a project in mind? Request a free estimate from Old Town Electric – or give us a call at (916) 307-0990. We serve Sacramento, Citrus Heights, Fair Oaks, Carmichael, Roseville, Folsom, and the surrounding area.
