New Haven, Conn., Code of Ordinances tit. V § 302

No person shall occupy as owner-occupant or let to another for occupancy any dwelling or dwelling unit for the purpose of living therein, which does not comply with the following requirements: (a)
Foundations, floors, walls, ceilings, roofs. Every foundation, floor, wall, ceiling and roof shall be reasonably weather-tight, water-tight, and rodent-proof; shall be capable of affording privacy; and shall be kept in sound working condition and good repair.
(b) Windows, outside openings. Every window, exterior door, and basement hatchway shall be reasonably weather-tight, water-tight, and rodent-proof, and shall be kept in sound working condition and good repair.
(c) Stairs, porches. Every inside and outside stair, every porch and every appurtenance thereto shall be maintained and kept in sound condition and good repair.
(d) Plumbing fixtures. Every plumbing fixture and water and waste pipe shall be properly installed and maintained in good sanitary working condition, free from defects, leaks and obstructions.
(e) Bathroom and kitchen floors. Every water closet compartment floor surface, bathroom floor surface and kitchen floor surface shall be constructed and maintained so as to be reasonably impervious to water and so as to permit such floor to be easily kept in a clean and sanitary condition.
(f) Drainage, disposal of rainwater. All rainwater shall be so drained and conveyed from every roof so as not to cause dampness in the walls, ceilings or floors of any habitable room, or of any bathroom or water closet compartment.
(g) Exterior wood surfaces. All exterior wood surfaces shall be adequately protected from water seepage and against decay and shall be maintained in good repair.
(h) Paint. All walls, ceilings, interior woodwork, doors and windows shall be kept free of flaking, peeling or loose paint, shall be repainted or otherwise resurfaced as needed, and shall be maintained in good repair. No person shall apply lead paint to the interior or exterior surfaces of any dwelling, rooming house, dwelling unit, rooming unit or facility nor on or around the common areas thereof.
(i) Installation and maintenance of required facilities. Every supplied facility, piece of equipment, or utility which is required under this title shall be so constructed or installed that it will function safely and effectively, and shall be maintained in good repair.
(j) Occupancy. No owner shall occupy or let to any other occupant any vacant dwelling unit unless it is clean, sanitary, and fit for human occupancy.
(k) Interior door. Every interior door shall be kept in sound working condition and good repair.
(l) House/apartment numbering. Every owner of a dwelling or dwelling unit shall be responsible for affixing and maintaining house numbers and/or apartment numbers as required under section 9-4 of the Code of the City of New Haven.
(m) Maintenance of accessory structures. All accessory structures, including garages, sheds and fences, shall be maintained structurally sound and in good repair.