Electrical Panel Upgrade in St. Charles County
Professional electrical panel services for all of St. Charles County. First Choice Electric provides 200 amp upgrades, panel replacement, and meter base services to 12 communities with licensed electricians and same-day inspection.
Panel Upgrade Services in St. Charles County
First Choice Electric is the trusted choice for electrical panel upgrades throughout St. Charles County. Based in Cottleville, we've served the county since 2010 with a focus on quality workmanship, transparent pricing, and excellent customer service.
St. Charles County Licensed
License #E25-000008. All work meets local code requirements and passes inspection.
Signs You Need a Panel Upgrade
Many St. Charles County homes were built with 100-amp service. Today's electrical demands often exceed that capacity.
Panel Upgrade Permits & Inspections in St. Charles County
Every electrical service upgrade in St. Charles County requires a permit and inspection, but which office issues it depends on where you live. We handle the paperwork for every jurisdiction in the county.
Unincorporated County Areas
Outside city limits, electrical service upgrades are permitted through St. Charles County Building & Code Enforcement. The county's Mechanical/Electrical/Plumbing permit specifically covers electrical service upgrades, and the county schedules its own inspections.
Cities With Their Own Permit Offices
St. Charles, St. Peters, O'Fallon, Wentzville, Lake St. Louis, and Cottleville each run their own building departments and issue their own electrical permits. We file with the correct office for your address, so you never have to figure out which jurisdiction you're in.
County-Licensed Contractor Required
St. Charles County requires permitted electrical work to be performed by a county-licensed electrical contractor. First Choice Electric holds St. Charles County electrical license #E25-000008 and Missouri license #2025001688.
Built to the 2020 NEC
St. Charles County and the cities of St. Charles, O'Fallon, and Wentzville all currently enforce the 2020 National Electrical Code (adopted alongside the 2021 I-Codes). Every panel we install is built to pass the local inspection the first time.
Why St. Charles County Homes Outgrow Their Panels
~93,000
residents in 1970
~213,000
residents in 1990
405,000+
residents in 2020
St. Charles County is one of Missouri's fastest-growing counties. U.S. Census counts show it more than quadrupled from roughly 93,000 residents in 1970 to over 405,000 in 2020. That means a huge share of the county's housing stock went up during the 1970s–1990s building boom in St. Peters, O'Fallon, St. Charles, and the surrounding communities.
Homes from that era were commonly built with 100-amp service, plenty for the time, but tight for today's EV chargers, heat pumps, finished basements, and hot tubs. Those original panels are now 30–50 years old, and some era brands like Federal Pacific and Zinsco have documented safety issues that make replacement strongly recommended.
A 200-amp upgrade brings these homes up to modern capacity, often paired with a meter base replacement when the exterior equipment is original to the house.
Ameren Missouri Coordination, Handled
A service upgrade isn't just a new panel. Increasing your home's amperage involves Ameren Missouri, and the utility work has to be sequenced correctly with the permit and inspection. Here's how we run it:
We submit your service upgrade request to Ameren Missouri's construction services team and confirm the scope of work.
The temporary power disconnect is scheduled for your installation date, so you're never without power longer than necessary.
Our licensed electricians complete the panel and meter base work and the local jurisdiction performs its inspection.
With the inspection passed, we coordinate reconnection with Ameren so your new service is energized, typically the same day.
Cities We Serve in St. Charles County
Click any city for local service information.
Panel Services for St. Charles County
200 Amp Upgrade
Upgrade from 100A to 200A to power modern homes and future additions.
$2,500 - $4,500
400 Amp Service
Class 320 meter base with dual 200A panels for large homes and high-demand properties.
$4,500 - $8,000
Meter Base
Replace corroded, damaged, or undersized meter bases.
$1,200 - $2,500
Panel Replacement
Upgrade from Federal Pacific, Zinsco, or other recalled panel brands.
$1,800 - $3,500
Sub-Panel
Add dedicated circuits in detached garages, workshops, or additions.
$1,500 - $3,000
Also Serving Nearby Counties
Get Your Free Quote in St. Charles County
Ready for a panel upgrade? First Choice Electric provides free estimates throughout St. Charles County with no obligation.