What a panel change fixes. When you need more service capacity. How to avoid surprises at the meter and on shutoff day.
Start with the fault, then choose the work
Get a breaker that keeps tripping checked before you buy a larger panel. NOVEC lists damaged wiring, overloaded circuits and faulty appliances as possible causes. A bigger service does not repair an appliance or the wiring that feeds it. Tell the electrician which breaker trips. Describe what was running. Mention whether the problem began after you added equipment.
Ask the electrician to make clear whether the quote covers a panel replacement or more service capacity. A panel replacement changes the equipment that distributes power through your house. A service heavy-up increases the capacity available to your house. It requires the electrician and utility to check the equipment that supplies it. The words “panel upgrade” alone do not tell you which job you are getting.
If the work is meant to stop repeated trips, ask what fault the electrician found. Ask how the work will fix it. NOVEC also lists flickering lights, sparks, hot or discoloured outlet covers and shocks as warning signs. Get professional help promptly if you notice these signs. They do not tell you what service size you need.
Source: Northern Virginia Electric Cooperative, Home Electrical Safety, May 2011 file, no separate effective date stated, for fault symptoms; Dominion Energy, Information and Requirements for Electric Service, Blue Book, March 2024 copyright, no separate effective date stated, for service-upgrade scope. Gathered 2026-09-23.
Size the service around the equipment you will use
If NOVEC supplies your home, its residential load form specifically covers a heavy-up. It asks about your house, heating fuel, service arrangement and equipment loads.
The form lists electric vehicle charging, tankless water heating, heat pumps and heat-pump backup heat separately. Give the electrician the actual equipment details, including backup heat. Calling it all “a new HVAC system” is not enough. Include planned appliances before the electrician settles the design. NOVEC requires load figures. You must notify NOVEC before connecting future loads.
Ask for the calculation behind the proposed service rating. Get a clear list of the equipment it covers. If a charger prompted the job, ask the electrician what charging load they have allowed for. Mention any plans to change your kitchen appliances or heating now. Otherwise, you cannot tell whether the quote covers your plans or only the equipment already installed.
Source: Northern Virginia Electric Cooperative, Residential Customer Load Data, revised 2024-03-14; no separate effective date stated. Gathered 2026-09-23.
Get the utility involved before setting a work date
Loudoun lists Dominion Energy and NOVEC as its electricity providers. Check your bill to see which utility serves your house. Each sets its own service and metering requirements.
Dominion assigns a work request number to a service upgrade. Its representative works through the design with you. They also settle what documents you need to provide. They explain which parts of the job you are responsible for. Ask for the work request number before you rely on an electrician's proposed date. Get the scope agreed with the utility too. Dominion says it installs the meter after the required electrical inspections.
You also need Dominion's specific permission before anyone removes or resets its meter. Your electrician may start the request while the electric account stays in your name. In that case, you must authorise Dominion to set the meter under your account. Use the work request number to do this.
NOVEC's residential load form says it must approve the metering arrangements. It may also choose or approve the equipment's location. Have your electrician settle this before ordering equipment. Get it settled before anyone promises that everything can stay where it is, too.
Source: Loudoun County, Utilities, undated, no effective date stated; Dominion Energy, Information and Requirements for Electric Service, Blue Book, March 2024 copyright, no separate effective date stated; NOVEC, Residential Customer Load Data, linked above, revised 2024-03-14. Gathered 2026-09-23.
Check the meter location before accepting the quote
An existing deck, fence or doorway can affect where your upgraded equipment goes. NOVEC publishes these meter clearances:
| Feature | NOVEC's published requirement |
|---|---|
| Deck above the meter | At least 7 feet high |
| Clear space in front of the meter | 60 inches |
| Unobstructed travel path in front | 36 inches wide |
| Space beside the meter | At least 2 inches on each side |
| Doors or windows | Cannot be within 1 foot of the meter |
These are only some of NOVEC's meter rules. They are not a complete design checklist. They are not Dominion's requirements either. NOVEC also prohibits meters on elevated platforms. If a fence surrounds your meter, NOVEC requires access through a gate.
If the meter needs moving, get that work included before you sign. NOVEC's renovation guidance says it supplies the meter base. You arrange for someone to mount it. You also arrange the entrance cable and panel work. You pay the costs of moving the meter. The local jurisdiction must inspect the work. Ask who repairs any wall or siding disturbed by the move.
Source: Northern Virginia Electric Cooperative, Call Before You Renovate, undated live guidance; no effective date stated. Gathered 2026-09-23.
Plan the shutoff and the route back to power
You can find general permit and inspection rules on the county electrician page. For this job, ask your electrician who arranges the utility shutoff. Settle who books the county inspection. Check who confirms that the utility can reconnect. Booking an electrician does not settle those other steps.
Loudoun uses LandMARC to schedule electrical inspections. It also reports results there. Ask how your contractor will pass the result to the utility. Settle who remains responsible if the inspector requires a correction. The county may charge for another visit if the work is not ready.
We could not verify a Loudoun-specific heavy-up completion time from a primary source. We could not verify a guaranteed outage duration either. Get a plan for how long your particular job will leave you without power. Ask what happens if the work fails inspection. Check what happens if the utility cannot return as expected. If someone depends on powered medical equipment, arrange an alternative before the scheduled shutoff.
Keep the county's recorded inspection result with your job documents. Power coming back on does not tell you the permit's status.
Source: Loudoun County Department of Building and Development, Building Inspections, undated; Dominion Energy, Planned Outages, undated, for medical-equipment planning; neither states an effective date. Gathered 2026-09-23.
Compare the complete price before you sign
We found no county-specific installed price for a panel replacement or service heavy-up from a primary public source. The permit schedule covered on the county page cannot tell you what an electrician will charge for your house.
Ask each bidder to price the same clearly defined job. Get the proposed panel, breakers and service rating in writing. Ask them to list what stays. Get a list of what they will replace. Check what work they include outside your house. Ask whether the price covers grounding and bonding work. Check whether utility charges and county fees are included. Ask whether inspection visits are covered. Check who pays to repair disturbed finishes. Your job may not need every item.
Loudoun's electrical application lists service rating, subpanels, circuits and equipment separately. Use those distinctions to check whether your quote covers the new appliance circuit as well as the service work. Ask how your contractor will price a defect found after opening the old equipment. Require agreement before any added work starts.
Source: Loudoun County Department of Building and Development, Electrical Permit Application, dated 2017-07-13, no separate effective date stated; Fee Schedules and Payment Options, undated page linking the schedule effective 2022-07-01. Sources establish scope fields and public fees, not installed prices. Gathered 2026-09-23.