Much of Arlington’s housing stock was built between the 1940s and 1960s — brick colonials, Cape Cods, and ramblers that were wired for a different era. Many of these homes still run on 100-amp electrical panels (some older condos and duplexes on even less), and that capacity made sense when a house had one window AC unit and a handful of appliances. It does not make sense for how Arlington homes are being used today. The wave of renovations that followed Amazon HQ2 — kitchen expansions, basement build-outs, heat pump conversions, EV chargers in the garage or parking pad — has pushed a lot of original panels to their limit.
SparkWise Electric upgrades electrical panels throughout Arlington, VA. We are licensed and insured Virginia electricians (VA Master #2710064102, VA Contractor #2705160838), we handle the Arlington County permit and inspection process, and we treat a panel upgrade as what it really is: the foundation for everything else you want your home’s electrical system to do. If you are planning a renovation, adding an EV charger, or just tired of breakers tripping, here is what a panel upgrade involves for an Arlington home.
Signs Your Arlington Home Needs a Panel Upgrade
Not every older panel needs to be replaced, but certain symptoms and situations reliably point toward an upgrade:
- Breakers trip when you run two big loads at once — the dryer and the microwave, or the AC and a space heater. That is a capacity problem, not a nuisance.
- Your panel is still rated 100 amps (or 60) and you are adding an EV charger, heat pump, induction range, or finishing a basement.
- The panel is full — no open slots for new circuits, or it is already stacked with tandem breakers.
- The brand is on the known-problem list. Federal Pacific and Zinsco panels, both found in mid-century Arlington homes, have documented failure histories and are usually flagged during home inspections.
- Buzzing, warm breakers, flickering lights, or scorch marks around the panel — these deserve prompt attention from a licensed electrician regardless of panel size.
- You are buying or selling. A dated panel is one of the most common home-inspection flags in Arlington’s older neighborhoods, and resolving it before listing removes a negotiating point.
From 100A to 200A: How the Upgrade Works
A 200-amp service upgrade — often called a “heavy-up” — is the standard modernization path for Arlington single-family homes. Here is how we run the project:
- Load assessment. We calculate your home’s existing and planned electrical load — including anything on your renovation wish list — and confirm 200 amps is the right target. For most Arlington homes it is; a few larger additions justify more.
- Permit filing. We file the electrical permit with Arlington County before work begins and coordinate with Dominion Energy on the service side.
- Panel and service replacement. On installation day we replace the panel, the meter base and service entrance conductors as required, install a new grounding electrode system to current code, and label every circuit properly.
- Inspection. Arlington County inspects the completed work. We schedule it, meet the inspector if needed, and close out the permit.
Power is typically off for part of the installation day while the new equipment goes in. Most homes are back on new, full-capacity service the same day.
Heavy-Up vs. Panel Swap: Which One Do You Need?
The two terms get used interchangeably, but they are different jobs. A heavy-up increases the amperage coming into your home — upgrading the service, meter, and panel together, usually from 100A to 200A. A panel swap replaces a failing, obsolete, or unsafe panel with a modern one at the same amperage — the right call when a Federal Pacific panel needs to go but your 100A or 150A service is genuinely adequate for how you live.
The load calculation tells us which job your home actually needs, and we will show you the numbers rather than defaulting to the bigger ticket. You can read more about like-for-like replacements on our panel swap service page.
Permits and Inspections in Arlington County
Panel and service upgrades in Arlington require an electrical permit through the Arlington County permit office, followed by inspection of the finished work. Permit requirements and processes vary by jurisdiction, and Arlington has its own filing system and inspection scheduling — we handle the paperwork, the utility coordination, and the inspection scheduling as part of every panel project, so you are never left managing the county process yourself. An unpermitted panel upgrade can create real problems at resale and with insurance, so this step is not optional and we never skip it.
Recent Panel Work Near Arlington
A few completed SparkWise panel projects from Arlington streets (details kept anonymous):
- 12th Street S (South Arlington) — full 200-amp overhead service upgrade: demoed the existing 150A panelboard and installed a new panel with all-new breakers and terminations.
- N Vermont Street — replaced an aging panel with a new Square D QO 100A load center, a like-for-like swap where the existing service size was adequate.
- Arlington Blvd — sub-panel installation to add circuit capacity without a service upgrade.
A note for condo and townhome owners: panel replacements inside individual units are usually straightforward, but anything touching shared service equipment or house panels involves the association and sometimes the building’s master metering arrangement. We are happy to look at your unit’s panel, explain what belongs to you versus the building, and scope only the work that is actually yours to authorize.
Panel Upgrade FAQ for Arlington Homeowners
How much does a panel upgrade cost in Arlington?
Most full panel upgrades run $2,500 to $5,000 depending on scope — the service size, the condition of the existing meter and service entrance, grounding work required, and how far the panel is from the meter. A like-for-like panel swap generally lands at the lower end; a full 100A-to-200A heavy-up with service replacement at the higher end. We give you a firm written quote before any work starts.
How long does the work take?
The physical installation is typically completed in a single day. The full project — permit filing, utility coordination, installation, and final inspection — usually spans one to three weeks depending on county and utility scheduling.
Can I stay home during the upgrade?
Yes. Power will be off for several hours while the new panel and service equipment are installed, so plan around no HVAC, internet, or refrigeration during that window — but there is no need to leave the house.
Will a 200A panel handle an EV charger?
In nearly all cases, yes. A 200-amp service comfortably supports a Level 2 EV charger installation alongside normal household loads, and we can run the dedicated EV circuit during the same visit as the panel upgrade — one permit, one project.
Should I add surge protection while the panel is open?
It is the cheapest time to do it. A whole-house surge protector mounts at the panel and protects everything downstream — adding one during a panel upgrade avoids a second service call.
Get a Panel Upgrade Quote in Arlington
SparkWise Electric serves all of Arlington — and if you need other electrical work while we are there, see everything we do on our Arlington electrician page. Call (703) 915-5351 or book online for a free panel upgrade estimate. Licensed & insured — VA Master #2710064102, VA Contractor #2705160838.
Panel Upgrades in Nearby Areas
We handle panel upgrades and replacements across Northern Virginia. If you are outside Arlington, these are the areas closest to you: Alexandria · Fairfax · Vienna · Reston · Ashburn · Gainesville.