Conn. Gen. Stat. § 29 § 29-265
(Formerly Sec. 19-400). Certificate of occupancy.
Operative Text
(a) Except as provided in subsection (h) of section 29-252a, no building or structure erected or altered in any municipality after October 1, 1970, shall be occupied or used, in whole or in part, until a certificate of occupancy, as defined in the regulations adopted under section 29-252, has been issued by the building official, certifying that such building, structure or work performed pursuant to the building permit substantially conforms to the provisions of the State Building Code and the regulations lawfully adopted under said code. Nothing in the code or in this part shall require the removal, alteration or abandonment of, or prevent the continuance of the use and occupancy of, any single-family dwelling but within six years of the date of occupancy of such dwelling after substantial completion of construction of, alteration to or addition to such dwelling, or of a building lawfully existing on October 1, 1945, except as may be necessary for the safety of life or property. The use of a building or premises shall not be deemed to have changed because of a temporary vacancy or change of ownership or tenancy. (b) No building official shall refuse to issue a certificate of occupancy for any single-family dwelling because such dwelling is not connected to an electric utility if such dwelling is otherwise in conformity with the requirements of this section and applicable local health codes and is equipped with an alternative energy system. A certificate issued under this section shall contain a statement that an alternative energy system is in place. For the purposes of this subsection, “alternative energy system” means any system or mechanism which uses solar radiation, wind, water, biomass or geothermal resources as the primary source for the generation of electrical energy. (c) Nine years from the date of issuance of a building permit issued pursuant to section 29-263 for construction or alteration of a one-family dwelling, two-family dwelling or structure located on the same parcel as a one-family dwelling or two-family dwelling, for which construction or alteration a certificate of occupancy, as defined in the regulations adopted pursuant to section 29-252, has not been issued by the building official, such building permit shall be deemed closed. Following such nine-year period, no enforcement action based upon work commenced or completed pursuant to an open building permit shall be commenced. No municipality or officer or employee of any such municipality shall be liable concerning any claim relating to the closure of a building permit pursuant to this section. For the purposes of this section, “structure” has the same meaning as in the zoning regulations for the municipality in which the building permit was issued, or if undefined by such regulations, “structure” means any combination of materials that is affixed to the land, including, but not limited to, a shed, garage, sign, fence, wall, pool, patio, tennis court or deck.
Conn. Gen. Stat. § 29-265 establishes that buildings or structures erected or altered in Connecticut after October 1, 1970, cannot be occupied or used until a building official issues a certificate of occupancy confirming the work substantially conforms to the State Building Code. The law also allows single-family dwellings equipped with alternative energy systems—such as solar, wind, or geothermal—to receive a certificate of occupancy even without a connection to an electric utility. Additionally, if a certificate of occupancy has not been issued within nine years of a building permit being issued for a one- or two-family dwelling, that permit is automatically deemed closed and no further enforcement action may be brought based on work done under it.
Plain English — not legal advice.
Under Conn. Gen. Stat. § 29-265, property owners who construct or alter buildings in Connecticut after October 1, 1970, are generally expected to obtain a certificate of occupancy from the building official before allowing any occupancy or use of the structure. Operators of single-family dwellings that rely on alternative energy systems—such as solar panels or wind generation—should be aware that a building official cannot deny a certificate of occupancy solely because the dwelling lacks a utility grid connection, provided all other requirements are met. Owners should also track the nine-year window following permit issuance for one- and two-family dwellings, since permits for which no certificate of occupancy has been issued are deemed closed after that period.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Conn. Gen. Stat. § 29-265 provides that a residential building cannot lawfully be occupied until a certificate of occupancy has been issued by the building official, which means tenants have an interest in confirming that such a certificate exists for their dwelling. If a landlord is renting a unit that was constructed or altered after October 1, 1970, without a certificate of occupancy, tenants may be able to raise this as a relevant issue in housing court proceedings or when filing a complaint with a local building or housing authority. Tenants who have questions about whether a certificate of occupancy was properly issued for their home may wish to contact a local tenant-rights organization or review public records held by the municipal building department.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated September 24, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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