200 Amp Panel Upgrade in Sacramento
Most Sacramento homes built before 1980 were wired for a house that did not have an EV in the garage, a heat pump on the roof and an induction hob in the kitchen. Here is how to tell whether your service has run out, what the upgrade actually costs here, and the part of the SMUD timeline that most quotes skip over.
What is left on a 100-amp service
Why 100-amp services run out
A 100-amp main panel does not give you 100 amps to spend. Anything that runs for three hours or more at a stretch is treated as a continuous load, and continuous loads are limited to 80% of the breaker’s rating. So the working budget on a 100-amp service is 80 amps, not 100.
Spend that budget on a typical Sacramento house and it goes quickly. Air conditioning takes somewhere around 15 amps. An electric dryer takes about 22. Kitchen circuits take roughly 10. Lighting and general receptacles take another 5 or so. That is 52 amps gone before anything modern is plugged in, and it leaves you about 28 amps.
Twenty-eight amps is a real number, not a scare number. It is enough for an entry-level Level 2 charger at 16 to 24 amps. It is not enough for a 48-amp charger — which needs a 60-amp breaker once the 125% continuous-load rule under Article 625 is applied — and it is nowhere near enough for a charger and a heat pump.
This is the arithmetic behind almost every “you’ll need a service upgrade” conversation in Sacramento. It is not the panel being old. It is the panel being full.
Amperage is not the same thing as panel spaces. A panel can have six empty slots and still have no capacity left — and it can be physically full while the service itself has room, in which case a sub-panel solves it for a fraction of the cost. Empty slots tell you nothing about whether you need a bigger service.
What actually pushes a Sacramento house over
Rarely one thing. Usually one thing on top of a service that was already close.
An EV charger
The most common trigger by a distance. A 40 or 48-amp charger is a continuous load and it is sized at 125% on the breaker. On a 100-amp service that is usually the end of the conversation — though not always, as the EV charger page sets out.
A heat pump
Replacing a gas furnace or gas water heater moves that load onto the panel for the first time. Two heat pumps — space and water — on a 100-amp service is almost always an upgrade.
An induction range
A 40 to 50-amp circuit where a gas hob previously drew nothing. Kitchen remodels are where this surfaces, usually late and usually as a surprise.
Solar or battery
Backfeed limits cap how much solar an older busbar can legally accept. Plenty of Sacramento solar quotes carry a panel upgrade inside them that is worth pricing separately.
An ADU
A second dwelling on the same lot is a load calculation of its own, and SMUD usually wants a duplex meter arrangement. Start early — SMUD’s own guidance puts the typical timeline from application to occupancy at four to six months.
A hot tub or a workshop
A spa panel is typically 50 amps. A garage workshop with a welder or a compressor is the same story. Both are common in Sacramento’s older single-storey tracts with deep lots.
How an electrician works out whether you have run out
Properly, with a load calculation — not by counting empty slots and not by eye. Under the California Electrical Code there is a defined method for existing dwellings that totals the general lighting and receptacle load, the fixed appliances, the largest heating or cooling load, and anything new you are adding, then applies demand factors so the figure reflects what actually runs at once rather than everything running simultaneously.
The output is a number in amps, and it either fits inside your service or it does not. Any electrician quoting a service upgrade should be able to show you that calculation. If the answer is “it’s an old panel, you need 200 amps” with no arithmetic behind it, ask for the arithmetic.
In some cases a calculation shows the existing service is adequate after all, or that a sub-panel rather than a full service upgrade is the right answer. A licensed electrician can tell you which situation you are in before anyone commits to a scope.
A Sacramento-specific wrinkle. The largest cooling load matters more here than in most of California. A July afternoon at 105°F has the air conditioning running flat out for hours — which is precisely when a marginal service is under maximum strain, and precisely when people discover the problem. Panel complaints spike in summer here for a reason.
What the upgrade involves in Sacramento
Because SMUD owns the meter and the service drop, this is a coordinated job rather than something an electrician can simply turn up and do.
- Permit and service application
An electrical permit from the City of Sacramento Community Development Department inside city limits, or Sacramento County Building Permits and Inspection Division for unincorporated areas like Arden-Arcade, Carmichael and Fair Oaks. Inside the city this is minor permit work with no plans required, filed by a licensed C-10 contractor through the Sacramento Public Permit Portal. A service change goes to the utility at the same time.
- The utility schedules the outage
Usually the longest wait in the job. A booking made today may not happen for a week or two.
- Disconnect, replace, re-land
The meter is pulled and the service de-energised. Out comes the old load centre; in goes a 200-amp panel or, more commonly on a Sacramento service change, a combined meter-main. Circuits are re-landed and labelled, grounding and bonding are brought up to current code, and whole-home surge protection goes in — now required on service upgrades. Where the mast (the riser), the weatherhead or the service entrance conductors are also at the end of their life, they are replaced at the same time.
- Inspection, meter set, reconnection
A city or county inspector signs it off. On a straightforward job the electrician coordinates a same-day disconnect and reconnect and you are back on that evening. On a full service change with a new meter panel, SMUD sets the meter after inspection approval — SMUD states that local agencies typically notify them one business day after sign-off, and that SMUD’s work is “typically completed within seven business days of the meter panel inspection approval”.
Ask which of the two your job is before you book it. Same-day reconnect versus a meter set that waits on inspection is the difference between one evening without power and potentially a week. It is also the single biggest gap between a specific quote and a vague one.
What a 200-amp upgrade costs in Sacramento
These are the ranges Sacramento homeowners commonly report and that Sacramento electricians publish on their own sites. They are context for reading a quote, not a quote and not an offer.
If you are comparing quotes rather than scoping the job, our panel cost page covers the seven things that move a number, the permit fees, and what SMUD contributes.
| Scope | Typical Sacramento range | What drives it |
|---|---|---|
| 100A to 200A, existing mast and conductors reused | $3,500 – $6,500 | The common case. Meter-main combo, new grounding, surge protection. |
| 200A including new mast, riser, weatherhead and service entrance conductors | $5,000 – $9,000 | Overhead services where the mast is corroded or undersized. |
| Underground service, or the panel moved to a different wall | $7,000 – $14,000+ | Trenching, conduit, stucco and drywall repair, longer utility coordination. |
| Sub-panel added for a garage, workshop or ADU | $1,200 – $3,000 | Where the service has capacity but the panel has no room. |
The four things that move a quote on the day
- The grounding electrode system. Pre-1970s Sacramento homes frequently need new ground rods and a water-pipe bond to meet current code. It is not optional and it is the most common change-order on these jobs.
- The mast and riser. If the inspector calls the service entrance, it gets replaced. A quote that excludes it can move by a couple of thousand dollars while the power is already off.
- Stucco, siding and drywall. Many electricians make good but do not finish. Confirm who patches and who paints before you sign.
- Permit fees. Set by the city or county and usually passed through. Ask whether they are inside the number or added later.
The quotes that blow up on the day are almost always the ones that excluded the mast. If two bids are $1,500 apart, that gap is usually the difference between a contractor who has assumed the service entrance is fine and one who has assumed it is not.
On SMUD rebates. SMUD’s Go Electric bonus offers up to $2,000 towards panel and circuit work, but it is tied to electrification — typically a qualifying heat pump installation plus eligible circuits, using a contractor in SMUD’s network. A standalone 200-amp upgrade on its own usually will not qualify. If a heat pump is on your list anyway, sequencing the work together is worth raising before anything is booked. Check current terms with SMUD directly, as programmes and funding change.
Common questions
Do I definitely need 200 amps, or would 150 do?
150-amp services exist but they are rarely worth it here. The labour, the permit, the utility coordination and the outage are all identical, and the equipment cost difference between 150 and 200 amps is small against the total. Almost every Sacramento electrician will put 200 in for essentially the same job, and you will not be back in five years when the next appliance arrives.
My panel has empty slots. Is that not enough?
No — those are different problems. Empty slots are physical space for breakers. Amperage is how much current the service can deliver. You can have six free slots and no capacity, or a physically full panel on a service with plenty of headroom, where a sub-panel solves it for a fraction of the cost of a service upgrade.
How long will the power be off?
On a same-day disconnect and reconnect, most of one working day. On a full service change with a new meter panel, SMUD sets the meter only after inspection approval, and their published guidance is that the work is typically completed within seven business days of that approval. Ask your electrician which of the two your job is before booking.
Can I do it at the same time as solar or an EV charger?
Yes, and you generally should. One permit, one outage, one round of utility coordination, one set of stucco repairs. Doing the panel first and the charger three months later means paying for the mobilisation twice. Our EV charger page covers what a Level 2 unit actually needs, and the SMUD rebate limits that decide which charger to buy.
Does a 200-amp upgrade need a permit?
Always. A service change requires an electrical permit everywhere in Sacramento County, and the utility will not set the meter or energise the service without inspection approval. Inside the City of Sacramento it is minor permit work with no plans required, filed by a licensed C-10 contractor through the Sacramento Public Permit Portal — homeowners cannot pull an electrical panel permit online.
Will this fix my insurance problem too?
If your carrier flagged a Federal Pacific or Zinsco panel, then yes — a 200-amp service change replaces the equipment they objected to, and the signed-off permit is the document they will want. There is more on that, including what carriers actually accept as proof, on our FPE and Zinsco replacement page.
Find out what your service will actually take
Tell us what you are adding and what panel you have. We will connect you with a CSLB-licensed C-10 electrical contractor covering your address. There is no charge to you, and no obligation to proceed.
Last reviewed September 2026. SMUD timings, permit rules and rebate terms all change — this page is dated so you can see how current it is.
About this service. Sacramento Electrical Panel is a free referral service that connects homeowners with independent, CSLB-licensed electrical contractors. We are not a licensed contractor, we do not perform electrical work, and we do not provide quotes, estimates or contracts for electrical work. Any price you are given comes from the contractor directly, and any contract you sign is between you and that contractor.
Cost ranges on this page are general information about the Sacramento market and are not an offer or an estimate. Always verify a contractor’s licence status and classification at cslb.ca.gov before signing anything or paying a deposit.