Trumbull, Conn., Mun. Code ch. 10 § 10-10

No person shall occupy or let to be occupied any dwelling or dwelling unit, for the purpose of living therein, which does not comply with the following requirements: (1)
Every dwelling unit shall contain at least one hundred fifty (150) square feet of floor space for the first occupant thereof and at least one hundred thirty (130) square feet of floor space for every additional occupant thereof, the floor space to be calculated on the basis of total habitable room space.
(2) No dwelling or dwelling unit containing two (2) or more sleeping rooms shall have such room arrangements that access to a bathroom or water closet compartment intended for use by occupants of more than one (1) sleeping room can be had only by going through another sleeping room or a bathroom or water closet compartment.
(3) At least one-half of the floor area of every habitable room shall have a ceiling height of at least seven (7) feet, and the floor area of that part of any room where the ceiling height is less than five (5) feet shall not be considered as part of the floor area in computing the total floor area of the room for the purpose of determining the maximum permissible occupancy thereof.
(4) No space located partially or totally below grade shall be used as a habitable room or dwelling unit unless:
a. The floor and those portions of the walls below grade are of waterproof and dampproof construction.
b. The minimum window area required in section 10-7 (1) is located entirely above the grade of the ground adjoining such window area or, if windows are located below grade, that there is constructed a properly drained window well the ground area of which shall be equal to or greater than the area of the window opening; the bottom of the window well shall be below the top of the impervious masonry construction under this window; the minimum horizontal projections of the bottom of the window well shall be equal to or greater than the vertical dimension of this window opening; and no part of the window well opposite this window shall protrude above a line projected at a forty-five-degree angle from the bottom of the window opening at right angles to the outer wall.
c. The total openable window area in each room is equal to at least the minimum as required under section 10-7 (2), except where there is supplied some other device affording adequate ventilation and approved by the appropriate authority.
d. There are no pipes, ducts or other obstructions less than six (6) feet, eight (8) inches above the floor level which interfere with the normal use of the room or area.
(5) Every dwelling unit shall have adequate closet or other storage space for personal effects of each permissible occupant; if it is lacking, an amount of space equal in square footage to the deficiency shall be subtracted from the area of habitable room space used in determining permissible occupancy.
(6) A dwelling unit shall not be occupied by more than one (1) family plus two (2) occupants unrelated to the family, except guests or domestic employees, or by not more than one (1) household if the occupants are unrelated, unless specific approval has been granted by the appropriate authority.
(7) Each dwelling shall have a suitable facility for the safe storage of medicines, toxic materials and household poisons, such as ammonia, paint, gasoline, etc., to ensure safety for children in a residential environment.