1.   Intent. The commercial-residential district is intended to provide for the convenience shopping of persons living in neighboring residential areas and for general uses and activities of a retail and personal service character. Only those uses are permitted which are necessary to satisfy the local needs which occur so frequently as to require commercial facilities in proximity to residential areas. In addition, low-intensity business and professional offices are permitted.

   2.   Principal Permitted Uses.

      A.   Any and all uses permitted under the R-3 Classification.

      B.   Retail business or service establishments such as the following:

         (1)   Confectionery stores

         (2)   Delicatessens

         (3)   Drug stores

         (4)   Convenience grocery stores

         (5)   Variety stores

      C.   Combinations of the above uses.

      D.   Business and professional offices supplying commodities or performing services primarily for residents of the neighborhood.

   3.   Permitted Accessory Uses.

      A.   Any and all accessory uses permitted under the R-3 Classification.

      B.   Storage of merchandise incidental to the principal use, but not to exceed 40 percent of the floor area used for such use.

      C.   On-site exterior signs, which shall be integral or attached to the building. No sign may project over any street line or extend more than six feet over any building line, whether attached thereto or to any other structure. In no case shall any sign project more than four feet above the roof line or 18 inches from the building wall and must be at least seven feet above grade. The total area of all signs pertaining to the use of or business conducted in any building shall be no greater than 15 percent of the wall area on which they are located. If the sign is indirectly lighted, it shall be illuminated by artificial light reflecting from the sign face and the light source shall not be visible from any street right-of-way. Moving, flashing, or rotating illuminated signs shall not be permitted. Where the lot adjoins an R district, the exterior sign shall be attached flat against the building and shall not face the side of the adjacent lot located in the R district; however, this does not apply to the side of the building which is opposite that side adjoining the R district.

      D.   All exterior signs shall be attached flat against the building.

   4.   Area Regulations.

      A.   Lot Area. The minimum lot area shall be the same as that in the R-3 classification for dwelling units. No minimum requirements for any other permitted uses.

      B.   Lot Width. For a dwelling and any building containing any dwelling units, the minimum requirement shall be the same as that under the R-3 classification. There is no minimum requirement for other permitted uses.

      C.   Yard Width.

         (1)   The minimum front yard depth shall be 25 feet, the minimum rear yard depth that the front yard is increased over the 25 feet.

         (2)   The rear yard may be decreased proportionately, except that where the rear yard adjoins the side lot line of a lot in an R district, there shall be a minimum rear yard of 15 feet adjacent to said lot line.

         (3)   The side yard required for residential uses shall be the same as that for the R-3 classification. There shall be no minimum requirement for any other permitted uses, except when adjoining any R-1, R-2, R-3 district, or street right-of-way, in which case the side yard requirement shall be 15 feet.

      D.   Building Height. The maximum height shall be two and one-half stories, or 35 feet.

      E.   Off-Street Parking and Loading. Spaces for off-street parking and loading shall be provided in accordance with the provisions of Section 165.23(2) of this chapter.