Connecticut environmental and land-use rules for development
The Connecticut rules a development project meets, the dates that matter next, and what changed recently: 31 state rules and 19 federal rules that reach Connecticut projects, each with its official source, including 6 proposed or with changes pending.
Coming up in Connecticut
October 2026
1 dateFederalTakes effectMediumIn 3 days
USDA Rural Energy for America Program (REAP) grants and guaranteed loans: Revised REAP grant rule takes effect
November 2026
2 datesFederalReport dueHighIn 19 days
PM2.5 designations: states' additional information requested
Area designations under the 2024 annual fine-particle (PM2.5) standard · Official source
FederalComments closeHighIn 23 days
PM2.5 designations: comments close
Area designations under the 2024 annual fine-particle (PM2.5) standard · Official source
February 2027
1 dateFederalHearing or decisionHighIn 4 months
PM2.5 designations: EPA's court-ordered deadline for final designations
Area designations under the 2024 annual fine-particle (PM2.5) standard · Official source
Latest Connecticut briefings
- MediumWindham County, CT
Connecticut Siting Council keeps Plainfield waste-to-energy petition on declaratory-ruling track; hearing October 22
The Council declined on October 1, 2026 to convert the 45-megawatt Plainfield petition into a full certificate case. The declaratory-ruling proceeding continues, with a remote hearing on October 22, 2026 and a decision deadline stated as August 2, 2027.
- MediumConnecticut
Connecticut bars leases that bill tenants for utilities their own unit meter does not measure
From October 1, 2026, Connecticut leases signed or renewed cannot make tenants pay utility charges unless a separate meter measures their unit's own use; such terms are unenforceable.
- LowConnecticut
Connecticut gives special-act towns full zoning enforcement powers, including $2,500 civil penalties and injunctions
From October 1, 2026, towns that zone under special acts may use the general statute's orders, court fines, injunctions and civil penalties against zoning violations.
- HighConnecticut
Connecticut bars state solar approvals in towns above set land-area shares until July 2027
A temporary bar on Siting Council solar approvals in certain towns runs to July 1, 2027, and new emergency-contact and incident-reporting duties for generating facilities start October 1, 2026.
- MediumConnecticut
Connecticut requires apartment building owners to file elevator repair plans within 48 hours of outages
Since October 1, 2026, owners of Connecticut buildings with housing and an elevator must notify tenants of outages within 24 hours and file a contractor's repair plan with the town within 48.
- MediumFairfield County, CT
Connecticut grants contested hearing on Brookfield gas compressor expansion before air permits issue, groups report
State environmental regulators have granted a trial-type hearing on air permits for two new gas turbines at the Iroquois pipeline's Brookfield station, according to Save the Sound; no date is set.
- MediumConnecticut
Connecticut pauses required building code updates until 2030 models while its delayed 2026 code awaits approval
A law in force since October 1, 2026 lengthens the state's code update cycle, while the codes built on the 2024 model codes still lack legislative approval and an effective date.
- MediumConnecticut
Connecticut extends as-of-right accessory units to special-act towns and limits water company hookup charges
From October 1, 2026, towns that zone under special acts must allow one accessory dwelling unit as of right, and investor-owned water companies face the connection-fee limits already applied to towns and authorities.