Across 58 permits filed since 2025-01-28, the median is $4,685; half of projects fall between $3,350 and $6,000. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in New London County, CT actually reported when they pulled permits.
Recent filings
- Install Kohler 26KW generator approximately 6' off left side of house. Install Kohler 200 amp automatic transfer switch in place of existing 200 amp manual transfer switch. Install new grounding/bonding per codeTown of Waterford · 2026-07-28$14,500
- Install new 200 amp underground service, branch wiring, devices and lighting for new barnMontville · 2026-07-22$4,000
- Upgrade overhead electric service from 100 to 200 ampMontville · 2026-07-22$4,000
How to read these numbers
Permit valuations are the project cost the applicant reports to the building department. They skew slightly low — nobody rounds up for the permit fee — and scope varies, so the middle-half range is the honest picture: half of all electrical panel upgrade permits in New London County, CT came in between $3,350 and $6,000. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
Same project, other places
Electrical panel upgrade in New JerseyElectrical panel upgrade in New YorkElectrical panel upgrade in Connecticut