A building, structure or use that is considered necessary to the operation or enjoyment of a lawful permitted use or conditional use, and which is appropriate, incidental, and subordinate to any such building, structure or use – including garages, accessory storage structures, solar energy collectors or other energy-conserving devices and equipment used for the mounting or operation of such devices, and other uses which are customarily incidental to permitted uses – shall be considered accessory when located on the same lot. A use which involves an increase in the number of dwelling units in a building or on a lot beyond that which is permitted in the zone, or which constitutes, in effect, the conversion of a use to one not permitted in the zone, shall not be considered an accessory use. This provision shall not apply to guest houses, which are clearly subordinate to the main dwelling on the lot. [Ord. 966 § 2 (Exh. B), 2021; Ord. 817 § 8-3J.124, 2006.]