Hartford, Conn., Mun. Code ch. 18 § 18-20

A. An owner operating or seeking to operate housing containing three (3) or more housing units, or otherwise allowing such housing to be occupied, shall apply to the director of licenses and inspections, on an application form to be provided for that purpose, for a license, provided that the following housing shall not be subject to the preceding requirement to apply for a license where the owner affirmatively declares the applicable exemption and provides proof in a form requested by the Director of Licenses and Inspections at the time when an application would otherwise be required:
(1) Housing containing three (3) or fewer housing units, which is occupied by an owner.
(2) A dormitory facility owned and operated by a college or university and inhabited primarily by students of such college or university.
(3) A parsonage facility owned and operated by a non-profit religious organization and inhabited by bona fide employees of such organization.
(4) Housing containing dwelling units created under the Common Interest Ownership Act, the Condominium Act, or the Unit Ownership Act of the State of Connecticut, wherein seventy-five (75) percent of such units are in individual ownership by distinct entities other than by the declarant or by any other single owner.
(5) Housing owned by a housing authority organized under the provisions of G.S. ch. 128 and constructed or altered pursuant to a contract with the federal government or the state providing for annual contributions or other financial assistance.
(6) Housing that is subject to inspection and licensure by the State of Connecticut Departments of Public Health, Children and Families, Mental Health and Addiction Services, or Development Services pursuant to the Connecticut General Statutes or the Regulations of Connecticut State Agencies.
B. Notwithstanding subsection A of this section 18-20 , to effectuate the purposes of this chapter and to ensure the orderly processing of applications, no license for a dwelling or dwelling unit shall be required:
(1) Prior to July 1, but no later than October 31, 2026, for buildings containing three (3) dwelling units.
(2) Prior to July 1, 2025, but no later than June 30, 2026, for buildings containing four (4) to nine (9) dwelling units.
(3) Prior to July 1, but no later than October 31, 2024, for buildings containing ten (10) to thirty-nine (39) dwelling units.
(4) Prior to July 1, but no later than October 31, 2023, for buildings containing forty (40) or more dwelling units.
On any date between the effective date of this ordinance and July 1, 2026, the director of licenses and inspections may demand that the owner of any dwelling with five (5) or more violations of this chapter for which citations have been finally issued (without further administrative appeals available) within any ninety-day period within the preceding two-year period submit an application for a license within sixty (60) days after the notice of such demand is sent, even if such demand would accelerate the date on which an initial application would otherwise be required by this chapter.
C. Notwithstanding subsection A of this section 18-20 , to effectuate the purposes of this chapter and to ensure the orderly processing of applications, no license for a group living dwelling or group living unit shall be required prior to July 1, 2023, for group living and residential care.
On any date between the effective date of this ordinance and July 1, 2023, the director of licenses and inspections may demand that the owner of any group living dwelling with five (5) or more violations for which citations have been finally issued (without further administrative appeals available) within any ninety-day period within the preceding two-year period submit an application for a license within the sixty (60) days after the notice of such demand is sent, even if such demand would accelerate the date on which an initial application would otherwise be required by this chapter.
D. Notwithstanding subsection A of this section 18-20 , to effectuate the purposes of this chapter and to ensure the orderly processing of applications, no license for a hotel shall be required prior to the effective date of this ordinance or prior to the expiration of an applicable current hotel license, whichever is earlier.
E. Notwithstanding subsection A of this section 18-20 , to effectuate the purposes of this chapter and to ensure the orderly processing of applications, no license for a rooming house or a rooming unit shall be required prior to the effective date of this ordinance or prior to the expiration of an applicable current rooming house license, whichever is earlier.