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Connecticut Rent Increase Law

Connecticut requires at least 45 days' notice before a rent increase takes effect, and longer notice in some cases. Connecticut has no statewide rent control, but local governments may regulate rents.

Last verified: 2026-10-30 · Researched and cited by MakeLease · not yet attorney-reviewed

Connecticut rent increase rules at a glance

Notice of a rent increase	45 days (Leases of one month or less: one full lease term)Conn. Gen. Stat. § 47a-4e, P.A. 24-143, § 17
Rent control	No statewide law; cities may regulateConn. Gen. Stat. § 7-148b (2026 Supplement), Conn. Gen. Stat. § 7-148c, Conn. Gen. Stat. § 7-148d
Ending a month-to-month tenancy	No state ruleConn. Gen. Stat. § 47a-23(a), Conn. Gen. Stat. § 47a-3b

Notice of a rent increase

In effect since October 1, 2024.
Before October 1, 2024: No statewide rent-increase notice period; notice followed the lease.

Rent control

In effect since January 1, 2026.
Before January 1, 2026: Towns, cities and boroughs of 25,000 or more had to create a fair rent commission by July 1, 2023 (P.A. 22-30).

What Connecticut law says

How much notice is required for a rent increase in Connecticut?

Connecticut landlords must give written notice at least 45 days before a rent increase takes effect, or one full term for leases of a month or less; the statute does not allow an increase during a lease term, and silence from the tenant does not count as agreement (Conn. Gen. Stat. § 47a-4e).

Does Connecticut have rent control?

Connecticut caps no rents statewide, but local fair rent commissions, required in towns of 15,000 or more residents by Jan. 1, 2028, can hear complaints and limit an excessive rent or increase to a fair amount (Conn. Gen. Stat. §§ 7-148b(b)-(c), 7-148d(a)) (Conn. Gen. Stat. § 7-148b (2026 Supplement)).

How much notice ends a month-to-month tenancy in Connecticut?

No Connecticut statute sets how much notice a tenant must give to end a month-to-month tenancy, so follow the lease; a landlord ends one by having a marshal serve a notice to quit for lapse of time that gives at least three full days and runs to the end of the rental month (Conn. Gen. Stat. §§ 47a-3b, 47a-23(a)) (Conn. Gen. Stat. § 47a-23(a)).

How Connecticut compares

9 of 51 verified jurisdictions require more than 45 days.

None of Connecticut's 3 neighbors follows the same rule.

Rent-increase notice	States
45 days (more in some cases)	Connecticut
No statewide period	Massachusetts
30 days (more in some cases)	New York
60 days (more in some cases)	Rhode Island

Local rules in Connecticut

Every Connecticut municipality with 15,000 or more residents must create or join a fair rent commission by January 1, 2028 (Conn. Gen. Stat. § 7-148b); a commission can limit a rent or increase it finds harsh and unconscionable. Tenants who are 62 or older or disabled (or live with such a family member) and live in a building of five or more units or a mobile home park can be evicted only for good cause (§ 47a-23c).

Other Connecticut rules

Security deposit limit	2 months' rent (with exceptions)Conn. Gen. Stat. § 47a-21(b)
Deposit return deadline	21 days after the lease endsConn. Gen. Stat. § 47a-21(d)(2), P.A. 23-207, § 38 (30 → 21 days, eff. Oct. 1, 2023)
Late-fee cap	Lesser of (1) $5 per day up to $50, or (2) 5% of the delinquent rent (5% of the tenant's share if rent is partly paid by a government or charity); one late charge per late paymentConn. Gen. Stat. § 47a-15a(b), P.A. 23-207, § 8 (eff. Oct. 1, 2023)
Entry notice	Reasonable written or oral notice of intent to enter, entry only at reasonable times; no notice in an emergencyConn. Gen. Stat. § 47a-16
Notice for unpaid rent	3 days (Notice to quit for nonpayment (served after the 9-day grace period))Conn. Gen. Stat. § 47a-15a(a) (2026 Supplement), Conn. Gen. Stat. § 47a-23(a)-(d) (2026 Supplement), Conn. Gen. Stat. § 47a-75(f)(2)

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