A complete 200-amp panel upgrade or same-amperage replacement in Northern Virginia stays within the published $3,500–$7,500 range. The address, existing service entrance, grounding, equipment layout, access, and utility coordination determine where the written proposal lands inside that band. County requirements affect process and scheduling, not a competing public price. A 400-amp service is quoted per project after load, service-equipment, and utility review.
Key Takeaways
- Every 200-amp upgrade and same-amperage replacement uses the published $3,500–$7,500 range
- County, utility, access, and existing-condition differences are documented in the written scope
- Permit, basic surge protection, fireman's disconnect, and standard utility coordination are included in the public 200-amp range
- A 400-amp service is quoted per project after engineering and utility review
- Dominion Energy serves most of Fairfax, Arlington, and Prince William; NOVEC serves much of Loudoun, so coordination steps differ
Fairfax County Panel Upgrade Costs
Fairfax County panel work follows the same published $3,500–$7,500 range for a 200-amp upgrade or same-amperage replacement. The written proposal identifies the service-entrance condition, equipment layout, access, permit path, and Dominion Energy coordination that apply to the address.
Need a Panel Upgrade?
Outdated or overloaded electrical panels can present safety and capacity concerns. Our team evaluates 200-amp upgrades throughout Northern Virginia and confirms scheduling after reviewing the property. Call (571) 444-6886 to get started.
| Project Type | Public Planning Price | Scope Notes |
|---|---|---|
| 100A to 200A upgrade | $3,500–$7,500 | Final position inside the band follows the documented service and access conditions |
| 200A panel replacement (same amperage) | $3,500–$7,500 | Same public band; equipment condition and defined scope still control the proposal |
| 200A to 400A upgrade | Quoted per project | Requires load, service-equipment, and utility review |
| Subpanel work | Quoted per project | Feeder, capacity, route, and equipment are evaluated separately |
Fairfax County inspection and Dominion Energy disconnect/reconnect timing depends on the current permit and utility queues, submitted scope, site conditions, and access. Homes in McLean, Great Falls, and Vienna can have custom configurations or unusual panel locations that affect labor and scheduling.
Good to Know: The applicable code cycle and required protective devices are confirmed for the permit address. The written proposal identifies the breaker and protection scope without publishing a second component-price band.
Arlington County Panel Upgrade Costs
Arlington County projects use the same $3,500–$7,500 public range for 200-amp work. Older housing, dense access, equipment location, and the county permit process can affect where a project lands inside the range, but they do not create a separate Arlington price band.
Roughly 42% of Arlington's single-family homes and older apartment buildings were built before 1970, making the probability of discovering outdated wiring, insufficient grounding, or service entrance issues higher than in younger suburban jurisdictions. Our data shows that Arlington panel upgrades require service entrance work approximately 28% of the time, compared to 18% in Loudoun County's newer subdivisions.
| Project Type | Public Planning Price | County Considerations |
|---|---|---|
| 100A to 200A upgrade | $3,500–$7,500 | Access, existing service condition, and permit coordination are documented |
| 200A panel replacement | $3,500–$7,500 | Same-amperage work stays within the same public band |
| 200A to 400A | Quoted per project | Load, service-equipment, and utility review required |
Access note: Parking and equipment access in dense Arlington neighborhoods can affect the installation plan. Any address-specific access requirement is documented in the written proposal before work begins.
Loudoun County Panel Upgrade Costs
Loudoun County 200-amp upgrades and same-amperage replacements use the same published $3,500–$7,500 range. NOVEC serves many Loudoun addresses while Dominion Energy serves others, so the written proposal confirms the utility and its disconnect or reconnect path rather than publishing a separate county price.
Loudoun's housing stock skews significantly newer than Fairfax or Arlington. Roughly 65% of single-family homes in Loudoun were built after 1990, meaning most already have 200A service. In these cases, homeowners often need panel replacement (same amperage, new box) rather than a true upgrade, which costs less. The upgrade scenario is most common in older Leesburg, Round Hill, and Purcellville neighborhoods.
- Ashburn / Sterling: 200A replacement remains within $3,500–$7,500
- Leesburg / Round Hill: 100A to 200A work remains within $3,500–$7,500
- Purcellville / Lovettsville: Route and access conditions are documented in the proposal
- Permit path: Confirmed for the address and included in the defined 200-amp scope
Prince William County Panel Upgrade Costs
Prince William County 200-amp upgrades and same-amperage replacements also use the published $3,500–$7,500 range. The written proposal identifies existing service condition, equipment location, access, permit coordination, and the Dominion Energy path for the address.
| County | 100A to 200A Upgrade | Permit | Primary Utility |
|---|---|---|---|
| Fairfax County | $3,500–$7,500 | Included in defined scope | Dominion Energy |
| Arlington County | $3,500–$7,500 | Included in defined scope | Dominion Energy |
| Loudoun County | $3,500–$7,500 | Included in defined scope | NOVEC or Dominion, by address |
| Prince William County | $3,500–$7,500 | Included in defined scope | Dominion Energy |
| City of Alexandria | $3,500–$7,500 | Included in defined scope | Dominion Energy |
What Drives Cost Differences Within Counties
Within each county, project-specific factors determine where a 200-amp job lands inside the published band. The most important variables are service-entrance condition, equipment location and access, grounding condition, existing circuit and breaker requirements, and whether hazardous-material or restoration coordination is needed before equipment can be opened or relocated. The written proposal documents the conditions included in the electrical scope.
Tip: Request that your electrician include a written statement of what is included in the permit and what inspection process will follow. In all four major Northern Virginia counties, a licensed electrical inspector must physically inspect the completed panel installation before the permit is closed. This inspection is your protection and adds no cost to your project.
Get a County-Specific Quote from AJ Long Electric
AJ Long Electric serves Northern Virginia with panel upgrades, subpanel installations, and service-entrance work. Estimates are free. The $99 dispatch fee applies only when we arrive prepared to complete a project, provide the price on site, and you decline the work. It covers travel and preparation. It is waived when you accept the on-site quote and for active members. It is not charged for a scheduled estimate visit. The resulting proposal identifies materials, labor, permit, and utility coordination for the observed scope. If concealed conditions or a requested scope change arise, we document the change and obtain approval before additional work proceeds. Call (571) 444-6886 to schedule.
