Across 75 permits filed since 2025-03-13, the median is $5,000; half of projects fall between $3,850 and $10,700. 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 new 200 amp meter socket with breaker. Run conduit to connex and tie into panel on connex and run from panel on connex to existing barn to replace existing service.Town of Waterford · 2026-09-11$8,000
- UPGRADING SERVICE TO 200 AMPS, INSTALL 2 GROUNDING RODS, SURGE-PROTECOTOR & NEW METERTown of Waterford · 2026-09-10$5,780
- New Overhead Electrical service to new detached garage. Application for new 200 amp service submitted to Groton Public Utilities(Bozrah Light and Power) 8/11/26. Application for building permit for garage construction B2026-0553. GPU inforMontville · 2026-09-10$4,635
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 $3,850 and $10,700. 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