Rent Increase Notice Requirements in Connecticut

At a glance

Requirements one by one

Notice period

Conn. Gen. Stat. § 47a-4e generally requires written notice at least 45 days before the proposed increase takes effect. If the lease term is one month or less, the notice period instead equals one full lease term. A weekly lease, for example, receives a full week's notice rather than 45 days.

The rule applies to rental agreements entered into, renewed, or extended on or after October 1, 2024. The statute also says silence is not agreement: a tenant's failure to respond to the notice does not accept the proposed increase.

Amount and fair rent review

Connecticut sets no single statewide percentage ceiling. Instead, § 7-148b requires a town, city, or borough with at least 25,000 residents to create a fair rent commission and lets smaller municipalities create one. Seasonal accommodations, defined by the statute's 120-day annual test, are outside that commission process.

Under § 7-148c, the commission decides whether a proposed increase is so excessive as to be harsh and unconscionable. Its statutory factors include comparable rents, conditions and needed repairs, taxes and overhead, the tenant's income and housing availability, the amount and frequency of prior increases, and reinvestment of the increased rent.

Fixed term and remedies

Section 47a-4e expressly says it does not allow a landlord to increase rent during the term of a rental agreement. Its opening sentence also makes a rent increase ineffective unless the required notice was given.

After a hearing, § 7-148d lets a fair rent commission limit a harsh and unconscionable proposed increase to an amount it finds fair and equitable. A violation of a commission order can draw the § 7-148f fine of $25 to $100 per offense, with continuing violations becoming new offenses after five days.

What trips people up

Forty-five days is not universal for every payment schedule. A lease of one month or less uses one full term, so a weekly lease follows a weekly notice period.

A commission challenge is not a statewide automatic percentage cap. It is a municipal hearing process applying the statutory harsh-and-unconscionable factors to the particular charge or proposed increase.

Retaliation is separate. Under § 47a-20 and § 47a-20a, a landlord generally may not demand an increase within six months after the listed protected tenant conduct, subject to the statute's tenant-fault and cost-increase exceptions.

Common questions

Can my landlord raise rent during my fixed lease after giving 45 days' notice?

Section 47a-4e says no: the notice section must not be construed to allow an increase during the rental-agreement term.

Does Connecticut cap every increase at a set percentage?

No. The general state statutes use fair rent commissions rather than one fixed percentage. A commission may limit a proposed increase after applying § 7-148c to the facts.

What if I do not answer the notice?

Your silence does not accept the increase. Section 47a-4e says a tenant's failure to respond is not agreement to the proposed increase.

Statutes and sources

• Conn. Gen. Stat. § 47a-4e. Notice period, short-term lease rule, silence, fixed-term limit, and October 1, 2024 applicability. Archived official chapter (captured June 12, 2026; accessed July 12, 2026).
• Conn. Gen. Stat. §§ 7-148b to 7-148f. Fair rent commission coverage, factors, orders, appeal, and penalties. Archived official chapter (captured June 12, 2026; accessed July 12, 2026).
• Conn. Gen. Stat. §§ 47a-20 and 47a-20a. Retaliatory increases and the statutory exceptions. Archived official chapter (captured June 12, 2026; accessed July 12, 2026).