Connecticut Rent Increase Notice Letter

State Cap: No statute. While Connecticut has no statewide statutory cap on residential rent increases, municipalities are authorized to establish local Fair Rent Commissions that can limit or reduce rent increases deemed harsh and unconscionable (C.G.S. § 7-148b; C.G.S. § 7-148c).

Notice Period: At least 45 days before the effective date for leases longer than one month, or an amount equal to the lease term (at least 30 days) for month-to-month tenancies (C.G.S. § 47a-4e; P.A. 24-143 § 17).

Proof of Service: Landlords must deliver written notice by in-hand personal delivery or by registered or certified mail (C.G.S. § 47a-23(c); C.G.S. § 52-57). If sent by mail, proof of mailing legally establishes service without requiring statutory mailing buffer days (C.G.S. § 47a-23(c)).

Prohibited Acts: Landlords cannot increase rent as retaliation against tenants for reporting code violations, joining a tenants’ union, or exercising statutory rights, or for discriminatory reasons under fair housing laws (C.G.S. § 47a-20; C.G.S. § 46a-64c).