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Solar site surveys · ConnecticutA technician on the roof, in the attic and at the service panel, with the survey read against the code editions, AHJs and utilities that apply in Connecticut.
Connecticut enforces one statewide code: the 2022 Connecticut State Building Code (2021 IRC and 2020 NEC) and the 2022 Fire Safety Code (2021 IFC), because the 2026 codes are still awaiting legislative approval. Each town's building official issues permits, and a state amendment to IRC R324.6 lets arrays skip eave-to-ridge pathways on a slope when the opposite slope is clear. Eversource and UI compensate new rooftop solar through the RRES program, which Public Act 26-127 extends through 2035.
The capture spec is the same everywhere. What the engineer and the plan reviewer read it against is not.
Connecticut's building code lists ground snow loads by town, for example 30 psf in Hartford, Danbury and Darien, 35 psf in Avon and New Hartford, and 40 psf in Cornwall in the northwest hills.1
The same town table sets design wind speeds and flags which towns are in the hurricane-prone region; Hartford's residential ultimate design wind speed is 120 mph.1
Placing the array on one slope and leaving the opposite slope clear with a ladder point can remove the need for a pathway on the solar slope under Connecticut's R324.6 amendment.1
Detached homes in condominiums and planned communities gained rooftop solar protections on January 1, 2026, but associations may still opt out by January 1, 2028, so check the association's status.6
Who reviews the plan set, and what the state layers on top.
The utility decides the interconnection path and what an exported kilowatt-hour is worth.
Connecticut's largest electric utility, serving about 149 cities and towns including Hartford. It posts its application to connect, net metering information, and hosting capacity maps on its Connecticut interconnection page.11,12
Interconnection page ↗Serves 17 towns and cities in the greater New Haven and Bridgeport areas and administers RRES tariffs for its customers alongside Eversource.13,14
Interconnection page ↗One standard, one visit, the same record in Connecticut as everywhere else. What it gets checked against is the code stack above.
The 2020 NEC, as part of the 2022 Connecticut State Building Code. The 2026 code would adopt the 2023 NEC, but as of September 2026 it still awaits approval by the Legislative Regulation Review Committee.1,2
The Residential Renewable Energy Solutions program, run by Eversource and UI since January 2022, which offers a Buy-All tariff or a Netting tariff for systems up to 25 kW AC.15,14
No. Public Act 26-127 reauthorizes the residential program through 2035, with PURA-designed successor tariffs starting January 1, 2028; storage-paired systems are exempt from new caps on rooftop solar.10,9
Since January 1, 2026, condominium and planned community rules cannot prohibit or unreasonably restrict rooftop solar on single-family detached units, though associations may opt out of the law by January 1, 2028.6
18 inches on each side of a horizontal ridge when arrays cover 33% or less of the roof's plan area, and 36 inches above that, under the 2022 code; a proposed change would allow 12 inches in some one-slope cases.5
Metro pages for Connecticut: Hartford.
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Explore →Every local fact on this page links to where it came from. Codes, programs and tariffs change: confirm the current requirement with the AHJ and the utility before you design.
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