Landlord notice deadlines — Connecticut
In Connecticut, the checked deadlines on this page cover: pay or quit, ending a tenancy, raising the rent. Each figure carries its statute and the stamp Rules checked October 2026. Run your exact dates through the checker — the period is only half the answer; the counting rule is the other half.
| Pay or quit | 3 calendar days — the tenant may pay and cure (Conn. Gen. Stat. §§ 47a-15a, 47a-23). Two steps: rent must first be at least 9 days late (the mandatory grace period), then the landlord serves a 3-day notice to quit. Paying within the grace period prevents the notice. |
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| End a tenancy | 30 days — month-to-month (lapse of time) (Conn. Gen. Stat. § 47a-23). Termination runs by notice to quit: the quit date must be the end of the rental period and at least 3 days after service, so plan on a full rental period (30 days) of lead time. For covered buildings, good-cause limits apply — see the just-cause routing for this state. |
| Raise the rent | 45 days (Conn. Gen. Stat. § 47a-4e (Public Act 24-143, § 17)). 45 days' written notice before a rent increase takes effect, for rental agreements entered into, renewed, or extended on or after October 1, 2024. For a lease with a term of 1 month or less, the notice must equal a full lease term. No cap on the amount; larger towns run Fair Rent Commissions that can roll back an excessive increase. This cell CORRECTS the RentIncreaseCheck dataset, which still showed no Connecticut notice period. |
| How days are counted | The notice to quit's quit date must be at least 3 days after service and fall at the end of the rental period; a notice served May 28 must give until June 1 (CT Judicial Branch landlord guide). |
| Allowed service methods | delivery by a state marshal or other proper officer, personally to each lessee or occupant, or left at their place of residence (Conn. Gen. Stat. § 47a-23(c)) |
| Just cause | Cause is required. Conn. Gen. Stat. § 47a-23c: tenants aged 62+ or with a disability in buildings of 5 or more units, and other covered tenancies under the good-cause rules. For a covered tenant, a lapse-of-time (no-cause) notice to quit does not work: the checker must route to the good-cause grounds in § 47a-23c instead of printing a bare termination date. |
| Sources checked | https://law.justia.com/codes/connecticut/2012/title-47a/chapter-832/section-47a-23/ https://law.justia.com/codes/connecticut/title-47a/chapter-830/section-47a-20-formerly-sec-19-375a/ |
Local rules sit on top of state law in many places — city just-cause lists, rent boards, and prescribed local forms. A state deadline is the floor of the analysis, never a promise that no local rule adds to it.
The paper that goes with the date
The checker gives you the date. The kit gives you the notices: pay or quit, non-renewal / termination, and rent increase letters generated from these same checked deadlines, a letter builder that fills in your dates and names, the move-in and move-out inspection checklists, and the proof-of-service checklist.
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