Across 765 permits filed since 2025-04-30, the median is $6,500; half of projects fall between $3,500 and $18,000. 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 Fairfield County, CT actually reported when they pulled permits.
Recent filings
- Install Kohler 38 kw generator in existing location; install 200 amp. ATS in existing locationTown of Greenwich · 2026-10-29$37,711
- Wire new appliance for new coffee shop, Install new emergency exit and emergency lights to code with existing wiring. Install new receptacles and switches in existing wiring to conform to code. Install new 200 amp, 3 phase 120/208 service aFairfield · 2026-10-29$14,000
- INSTALL (26KW) STANDBY GENERATOR-UPGRADE SERVICE FROM 200 TO 400 (1) NEW 200 AMP PANELCity of Norwalk · 2026-10-28$18,000
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 Fairfield County, CT came in between $3,500 and $18,000. 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