1.   Permitted Principal Uses.

      A.   Any use or structure permitted and as regulated in Section 165.12, except as hereinafter modified.

      B.   Dwellings for any number of families.

      C.   Boarding and lodging houses.

   2.   When Authorized by Board of Adjustment.

      A.   Any use as regulated in Section 165.12, except as hereinafter modified.

      B.   Office of civic, religious or charitable organizations and financial or insurance institutions conducting their activities primarily by mail and not handling merchandise or rendering services on the premises.

      C.   Physicians’ and dentists’ offices and private clinics for human care, professional offices of architects, engineers, lawyers, and the like; offices devoted to real estate, insurance, management, and similar enterprises when conducting their activities primarily by mail or telephone and not displaying or handling merchandise on the premises.

      D.   Mobile home parks subject to the following conditions:

         (1)   The mobile home park shall be located on a parcel of ground at least five acres in size and each boundary line of the park shall be at least 100 feet from any residential structure located outside the park unless separated by a natural or artificial barrier.

         (2)   The park shall be located on a well-drained site, properly graded to ensure rapid drainage and freedom from stagnant pools of water.

         (3)   Each mobile home space shall be large enough to provide a distance of 10 feet between any residence unit or structure on the space and the lot line, a front yard of 15 feet and a rear yard of 10 feet.

         (4)   All mobile home spaces shall abut upon a driveway of not less than 20 feet in width which shall have unobstructed access to a public street.

         (5)   Walkways not less than two feet wide shall be provided to service buildings.

         (6)   All driveways and walkways in the park shall be hard surfaced and lighted at night.

         (7)   An electrical outlet supplying at least 220 volts shall be provided for each trailer space.

         (8)   Adequate sanitary facilities and supply of pure water shall be provided to each trailer space.

         (9)   Each park shall comply with the regulations set forth by competent authority.

   3.   Permitted Accessory Uses.

      A.   R-3 Residence District accessory uses.

      B.   Signs as regulated by Section 165.21.

   4.   Height Regulations. No principal structure shall exceed six stories or 75 feet in height, at the required front, side, and rear yard lines, other than as provided in Section 165.24, except that one foot may be added to the height permitted for each one foot that the building is set back from the required yard lines and that one foot be added to the minimum lot width for each one foot that the building exceeds six stories or 75 feet in height.

   5.   Lot Area, Frontage, and Yard Requirements. The following minimum requirements shall be observed, subject to the additional requirements, exceptions and modifications in Section 165.24. Each structure shall be located on a lot containing at least 6,000 square feet. Each structure containing more than one family shall be located on a lot having an area of 2,000 square feet for each family.