Home occupations shall be subject to the following conditions in addition to use regulations in various districts:
   (a)   Said home occupation shall be clearly incidental and subordinate to the use of the property for residential purposes. All home occupations must occur within the primary dwelling.
   (b)   Not more than the equivalent of twenty-five (25) percent of the gross floor area of the dwelling shall be for a home occupational use.
   (c)   The external appearance of the structure in which the use is conducted shall not be altered. Furthermore, no external alteration, construction or reconstruction of premises to accommodate the use shall be permitted.
   (d)   There shall be no outside storage of any kind related to the home occupational use.
   (e)   No expansion of existing off-street parking shall be permitted. Furthermore, no additional parking burden, due to the home occupational use, shall be created.
   (f)   No equipment, process, materials or chemicals shall be used which create offensive noises, vibration, smoke, dust, odor, heat, glare, x-rays, radiation or electrical disturbances.
   (g)   No retail sales of any products shall occur on the premises.
   (h)   Not more than one (1) person, who is not a resident of the premises, may participate in the home occupation as an employee or volunteer.