(C) For purposes of this subdivision, discrimination includes: (i) A refusal to permit, at the expense of a person with a physical or mental disability, reasonable modifications of existing premises occupied or to be occupied by such person if such modifications may be necessary to afford such person full enjoyment of the premises; except that, in the case of a rental, the landlord may, where it is reasonable to do so, condition permission for a modification on the renter agreeing to restore the interior of the premises to the condition that existed before the modification, reasonable wear and tear excepted; (ii) a refusal to make reasonable accommodations in rules, policies, practices or services, when such accommodations may be necessary to afford such person equal opportunity to use and enjoy a dwelling; (iii) in connection with the design and construction of covered multifamily dwellings for the first occupancy after March 13, 1991, a failure to design and construct those dwellings in such manner that they comply with the requirements of Section 804(f) of the Fair Housing Act or the provisions of the state building code as adopted pursuant to the provisions of sections 29-269 and 29-273 , whichever requires greater accommodation. “Covered multifamily dwellings” means buildings consisting of four or more units if such buildings have one or more elevators, and ground floor units in other buildings consisting of four or more units.