Electrical Panel Installation

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Electrical Panel Installation in Fairfax, VA & Northern Virginia

When you are building a home addition, finishing a detached garage, constructing an ADU, or undertaking a project that requires a new electrical panel rather than an upgrade to an existing one, Rojas Electric handles the complete electrical panel installation. We serve homeowners, general contractors, and builders throughout Fairfax, VA and all of Northern Virginia — sizing, permitting, installing, and inspecting new electrical panels to Fairfax County code from day one.

A new panel installation requires a proper load calculation to determine the right service size, coordination with Dominion Energy for the utility connection, Fairfax County permit processing, and an installation that will pass the county electrical inspection the first time. Rojas Electric handles all of this — and can assess your project scope and provide a preliminary estimate over the phone before you commit to scheduling a site visit.

Electrical Panel Installation Services We Offer in Fairfax, VA & Northern Virginia

New Residential Panel Installation

New electrical panel installation for home additions, new construction phases, and situations where no existing panel serves the space. We size the panel correctly for the full intended electrical load — not undersized for the work at hand.

Subpanel Installation for Detached Garages & Workshops

A subpanel fed from your main house panel is the ideal solution for powering a detached garage, workshop, or outbuilding — providing dedicated capacity without running individual circuits from the house for each load.

ADU Electrical Panel Installation

Accessory dwelling units require dedicated electrical service in Fairfax County — either a subpanel fed from the main house or a separate utility service depending on the scope and your county approval.

Span Smart Panel Installation as New Construction

If you are installing a new panel as part of construction or a major addition, this is the ideal time to install a Span smart panel — particularly if you plan to add EV charging, solar, or battery backup.

Home Addition Electrical Panel Work

Home additions frequently require new subpanels to serve the addition's electrical loads without overloading the existing main panel. We assess your main panel's remaining capacity and design the subpanel configuration.

Main Panel Replacement with Utility Coordination

When an existing panel is being fully replaced as part of a renovation — such as when relocating the panel — we handle the complete removal, installation of the new panel, and coordination with Dominion Energy for utility reconnection.

Our Electrical Panel Installation Process in Fairfax, VA & Northern Virginia

1

Load Calculation & Panel Sizing

We calculate the total connected load for the space being served — all planned circuits, HVAC, appliances, EV charging if applicable — and determine the correct panel size with capacity for current needs and reasonable future growth.

2

Utility Coordination

For new service installations and service upgrades, we coordinate with Dominion Energy for the utility connection, meter installation, and any required service entrance work.

3

Fairfax County Permit

All electrical panel installations require a Fairfax County building permit. We submit the permit application, provide required documentation, and schedule all required inspections.

4

Installation

We install the panel enclosure, mount the main breaker, install all branch circuit breakers, run all wiring connections, and label the panel clearly. New panel installations are installed with proper grounding and bonding per current NEC and Fairfax County code.

5

Inspection & Sign-Off

We schedule and attend the Fairfax County electrical inspection. The panel installation is not complete until it passes county inspection and is on record.

  • We perform a full load calculation before specifying your panel — sized for current needs and reasonable future growth. An undersized panel on a new addition is a problem you do not want to discover after the walls are closed.

  • New service installations require utility coordination that most homeowners have never navigated. We manage Dominion Energy communication and scheduling on your behalf.

  • All panel installations are fully permitted and inspected. The work is on record with Fairfax County — important for insurance, future projects, and eventual home sale.

  • We understand construction timelines and sequence our work — panel, rough-in, trim-out — to fit within your contractor's overall project schedule without creating delays.

  • Panel installation, circuit rough-in, subpanel work, and trim-out — Rojas Electric handles the complete electrical scope so you are not coordinating multiple electrical subcontractors.

Benefits of New Electrical Panel Installation by Rojas Electric in Fairfax, VA

FAQs:

Electrical Panel Installation in Fairfax, VA & Northern Virginia

New electrical panel installation costs in Fairfax and Northern Virginia vary based on panel size, service amperage, and project complexity. A subpanel installation for a detached garage typically runs $1,500 to $3,000. A new main panel installation for an addition or ADU runs $2,500 to $5,000 or more depending on service size and utility involvement.
Panel size depends on what you plan to power. A basic garage with lighting, outlets, and a garage door opener is typically served by a 60-amp subpanel. A workshop with power tools needs 100 amps. A garage with an EV charger needs 100 amps minimum — often 200 amps if the charger plus workshop loads exceed 100-amp capacity.
An ADU in Fairfax County typically requires dedicated electrical service — either as a subpanel fed from the main house panel or as a separate utility service. The approach depends on your county approval conditions and preferences for metering. We advise on the options and handle the electrical installation for whichever configuration is approved.
Yes, without exception. New electrical panel installations require a Fairfax County electrical permit and a county inspection. Rojas Electric handles the permit application and all inspection coordination as part of every panel installation project.
Yes — and new construction is one of the best times to install a Span smart panel. Since you are already paying for new panel installation, the incremental cost of upgrading to Span versus a standard panel is lower than a future conversion. If you plan to add EV charging, solar, or battery backup, Span panel installation during new construction is a particularly strong investment.
A subpanel installation for a detached garage or home addition typically takes one full day. A new main service installation coordinated with Dominion Energy may require additional scheduling time for the utility company's involvement.
Yes. We coordinate the panel installation and rough-in wiring as part of the same project, scheduling both phases to align with your general contractor's timeline. Panel first, rough-in wiring second, trim-out after drywall — we sequence our work to fit the overall construction schedule.
Your main electrical panel receives power directly from the utility service entrance and is protected by the main breaker. A subpanel receives power from the main panel through a feeder circuit and serves a specific area. The subpanel has its own breakers for the circuits it serves but does not have an independent utility connection.
It depends on the remaining capacity in your existing main panel and the total electrical load the addition will add. If your main panel has sufficient available capacity, the addition's circuits may feed directly from the main panel. If not, a subpanel is the right solution. We assess your main panel during the project estimate.
Yes. We work with general contractors and builders on residential projects throughout Fairfax County and Northern Virginia. We understand construction timelines, coordinate our work phases with the overall project schedule, and communicate proactively with project managers.

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