Free Connecticut Lease
Extension Addendum Template

Connecticut Lease Extension Addendum

This Lease Extension Addendum is built with Connecticut as the governing state. These are the Connecticut landlord-tenant rules that most often bear on it, with the statute for each.

Connecticut rules at a glance

Rent, late fees & rent increases

Connecticut’s 2023 and 2024 housing acts reshaped the money side of a lease: late charges are tightly capped, most up-front fees are banned, and rent increases need advance written notice.

• Grace period — Tenants get a 9-day grace period after the due date (4 days for a one-week tenancy). No late charge can be assessed, and no eviction for nonpayment can begin, before it runs (§47a-15a).
• Late-fee cap — A late charge must be in a written lease and may not exceed the lesser of $5 per day up to $50, or 5% of the delinquent payment — and only one late charge per late payment, however long it stays unpaid (§47a-15a). A lease clause charging more, or charging during the grace period, is unenforceable (§47a-4).
• Up-front fees — Beyond the security deposit and first month’s rent, a landlord may charge only a tenant-screening fee (capped at $50, adjusted for inflation) and a deposit for keys or special equipment — no application, move-in or move-out fees. A landlord who charges the screening fee must give the applicant a copy of the report (or how to get it) and the screening company’s receipt (§47a-4d).
• Rent increases — No increase takes effect unless the tenant received written notice at least 45 days in advance — or, for a lease with a term of one month or less, notice equal to one full term. Silence isn’t agreement, and rent can’t rise mid-lease (§47a-4e, for leases entered into, renewed or extended on or after October 1, 2024).
• Fair rent commissions — Towns above a population threshold (25,000, being lowered to 15,000 under a November 2025 special-session housing act) must have a fair rent commission that can hear tenant complaints and roll back increases it finds harsh and unconscionable (§§7-148b–7-148f).
• All-in advertised rent — Since October 1, 2025, advertised rent must include the periodic or recurring fees the tenant is required to pay, with limited exceptions such as pet charges and separately paid utilities (P.A. 25-44).

More Connecticut landlord documents

• Connecticut Residential Lease Agreement
• Connecticut Eviction Notice
• Connecticut Security Deposit Return Letter
• Connecticut Rent Increase Notice
• Connecticut Application Approval Letter
• Connecticut Application Denial Letter
• Connecticut Background & Credit Check Authorization
• Connecticut Rental Application
• Connecticut Co-Signer Guarantor Agreement
• Connecticut Bed Bug Addendum
• Connecticut Mold & Mildew Addendum
• Connecticut No-Smoking Addendum
• Connecticut Parking & Storage Addendum
• Connecticut HOA & Community Rules Addendum
• Connecticut Crime-Free Housing Addendum
• Connecticut Utilities & Services Addendum
• Connecticut Early Termination Addendum
• Connecticut Lead-Based Paint Disclosure
• Connecticut Military Clause (SCRA)
• Connecticut Pet Addendum
• Connecticut Cash for Keys Agreement
• Connecticut Mutual Lease Termination Agreement
• Connecticut Lease Renewal Agreement
• Connecticut Notice of Non-Renewal
• Connecticut Late Rent Notice
• Connecticut Lease Violation Notice
• Connecticut Notice of Entry
• Connecticut Move-In / Move-Out Inspection Checklist
• Connecticut Rent Receipt
• Connecticut Rent Verification Letter
• Connecticut Tenant Welcome Letter
• Connecticut Property Management Agreement
• Connecticut Commercial Lease
• Connecticut Rent-to-Own Agreement
• Connecticut Short-Term Rental Agreement
• Connecticut Room Rental Agreement
• Connecticut Roommate Agreement
• Connecticut Spanish Lease Agreement
• Connecticut Sublease Agreement
• Connecticut Lease Amendment

Lease Extension Addendum in other states

• Alabama Lease Extension Addendum
• Alaska Lease Extension Addendum
• Arizona Lease Extension Addendum
• Arkansas Lease Extension Addendum
• California Lease Extension Addendum
• Colorado Lease Extension Addendum
• Delaware Lease Extension Addendum
• Florida Lease Extension Addendum
• Georgia Lease Extension Addendum
• Hawaii Lease Extension Addendum
• Idaho Lease Extension Addendum
• Illinois Lease Extension Addendum
• Indiana Lease Extension Addendum
• Iowa Lease Extension Addendum
• Kansas Lease Extension Addendum
• Kentucky Lease Extension Addendum
• Louisiana Lease Extension Addendum
• Maine Lease Extension Addendum
• Maryland Lease Extension Addendum
• Massachusetts Lease Extension Addendum
• Michigan Lease Extension Addendum
• Minnesota Lease Extension Addendum
• Mississippi Lease Extension Addendum
• Missouri Lease Extension Addendum
• Montana Lease Extension Addendum
• Nebraska Lease Extension Addendum
• Nevada Lease Extension Addendum
• New Hampshire Lease Extension Addendum
• New Jersey Lease Extension Addendum
• New Mexico Lease Extension Addendum
• New York Lease Extension Addendum
• North Carolina Lease Extension Addendum
• North Dakota Lease Extension Addendum
• Ohio Lease Extension Addendum
• Oklahoma Lease Extension Addendum
• Oregon Lease Extension Addendum
• Pennsylvania Lease Extension Addendum
• Rhode Island Lease Extension Addendum
• South Carolina Lease Extension Addendum
• South Dakota Lease Extension Addendum
• Tennessee Lease Extension Addendum
• Texas Lease Extension Addendum
• Utah Lease Extension Addendum
• Vermont Lease Extension Addendum
• Virginia Lease Extension Addendum
• Washington Lease Extension Addendum
• West Virginia Lease Extension Addendum
• Wisconsin Lease Extension Addendum
• Wyoming Lease Extension Addendum