New Haven, CT Accessory Structures: ADU Rental Restrictions (2026)
Key Facts
- Owner-occupancy
- Required, principal or ADU unit
- Deed restriction
- Filed before building permit
- Separate sale
- Barred by recorded restriction
- Temporary absence exception
- Up to 3 years
Summary
New Haven ADUs are only allowed when the property owner lives on site, and a recorded deed restriction bars ever selling the accessory unit separately from the main house.
G.PROPERTY OWNERSHIP AND OCCUPANCY.1.Accessory dwelling units shall only be permitted when the property owner lives on the property, within either the principal dwelling or accessory dwelling unit... H.DEED RESTRICTION... The accessory dwelling unit shall not be sold separately from the principal dwelling unit, nor shall the lot be subdivided to provide a separate lot for the accessory dwelling unit. The above restrictions shall run with the land and are binding upon any successor owner of the property.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 31 | Zoning: Supplement 32).
Full Breakdown
Before a certificate of occupancy issues, the owner must file a notarized letter promising to occupy either the principal dwelling or the ADU as a primary residence, with narrow exceptions for temporary job assignments, sabbaticals, or medical facility admission. Before the building permit issues, the owner must also record a deed restriction with the City Clerk stating the ADU can't be sold separately from the principal dwelling and the lot can't be subdivided to create a separate ADU parcel; the restriction runs with the land and lapses only when the ADU is removed.
Violations & Fines
An ADU created or sold without the required owner-occupancy letter or recorded deed restriction is a zoning violation subject to cease-and-desist orders and penalties enforced by the Zoning Enforcement Officer under the New Haven Charter.
Frequently Asked Questions
Can a New Haven homeowner rent out both the main house and the ADU to tenants?
Can an ADU be sold as a separate property in New Haven?
Sources & Official References
Other rules in New Haven
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