Electrical panel upgrade cost in Connecticut (2026)

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Three different jobs get called "panel upgrade"

The price spread in every cost guide comes from mixing three scopes. Know which one you're asking for.

Line items that move the number

• Panel hardware. A 200A panel unit runs $250–$350 (national guide A, 03/2026). Brand-name 40-space panels with a main breaker sit at the top of that band.
• Labor. National guides put electrician rates at $40–$250/hour and a straight panel swap at 4–8 hours and a full service upgrade at 8–10 (national guide B, 06/2026); CT contractors describe most upgrades as a one-day job with power off 6–10 hours (CT contractors 1 and 2, 2025–2026).
• Meter socket and mast. National guides price a meter box replacement as a standalone job at $1,800–$3,500 (national guide A, 03/2026); as part of a heavy-up it is not an extra on top of the ranges above — the $2,800–$4,500 heavy-up figure already includes the socket, mast and entrance cable. Eversource requires sockets from its approved list with lever-operated bypass jaws (Eversource approved socket list, 09/2024).
• Surge protection. Under NEC 2020 §230.67, a Type 1 or Type 2 surge protective device is required whenever service equipment is replaced. Budget $70–$700 installed, typical $300 (national guide B, 06/2026).
• AFCI breakers. Where branch-circuit wiring is modified, replaced or extended, NEC 2020 §210.12(D) requires AFCI protection; a panel-only relocation is a narrow exception. Ten to twenty AFCI breakers add real cost — ask for the count in the estimate.
• Grounding and bonding. Older Fairfield County homes often lack a second ground rod or water-pipe bond; contractors fold this into the heavy-up price.
• Permit. Typically $60–$150 on a $3,000–$5,000 job; more on larger jobs, since most schedules scale with declared value. Stamford: $13 per $1,000 of job value, $60 minimum, plus the $0.26/$1,000 state education fee. Trumbull: $5 per $100 on the first $1,000, $10 per $1,000 after, $60 minimum, plus $10 processing, $10 certificate of occupancy and the state fee (about $101 on a $3,500 job). All 12 towns →
• Utility coordination. For an overhead residential service upgrade (≤400A) in Eversource territory the electrician must obtain a service request number at least 15 days before the work under the cut-and-reconnect policy (2018); underground and larger services are scheduled by Eversource, and an after-hours emergency repair may proceed with the request and permit filed within one business day. There is no utility fee for a standard residential upgrade in the policy documents; the cost is scheduling lead time.
• Subpanel instead. If the main service is fine and you only need more breaker spaces, a subpanel runs $400–$1,750 nationally (national guide A, 03/2026) and $1,000–$2,000 in CT (CT contractor 1, 06/2026).

What a good Connecticut estimate shows

1. Scope named as one of the three above, with the service amperage before and after.
2. Panel make/model, breaker count, number of AFCI and GFCI breakers.
3. Meter socket model (should be on the Eversource or UI approved list) and whether the mast/entrance cable is replaced.
4. Grounding electrode work listed separately.
5. Permit fee and who pulls it (a CT-licensed E-1 contractor, or the homeowner for an owner-occupied single-family home under CGS §20-340).
6. Utility service request number, or the date it will be filed.
7. Expected power-off window and the inspection step before the meter is resealed.

If an estimate is a single line with a single number, ask for this breakdown before comparing it to anyone else's.

Published 2026-09-10 · Updated 2026-09-27 · Fairfield County, CT · Every figure above is sourced in the list above, with a date where the source publishes one.