This district is intended to provide for low-density residential areas of the City now developed with one- family and two-family dwellings, and areas where similar residential development is likely to occur.

   1.   Permitted Uses. A building or premises shall be used only for the following purposes: any use permitted in the “R-1” district; two-family dwellings; and two-unit row dwellings.

   2.   Accessory Uses. Any accessory use permitted in the “R-1” district is permitted. When fences are erected or constructed for row dwellings, said fence shall be centered on the lot line and shall be erected or constructed of the same material so that the appearance of the fence is the same on either side. Said fence shall not exceed six feet in height and shall be erected in the rear yard only.

   3.   Interior Living Space. The minimum ground floor area of a single-family dwelling or row dwelling shall be not less than 700 square feet in 1-story and 1½- story dwellings, and shall be the area included within the outside lines of the exterior walls of the main structure at the ground floor level. The minimum square feet of ground floor area of a 2-story single-family or row dwelling shall be 550 square feet. The minimum square feet of floor area within each dwelling unit of a two-family dwelling shall be not less than 400 square feet. Except one unit of a two-family dwelling may be an efficiency dwelling unit as provided for in the Building Code as adopted by the City. The minimum width of a row dwelling shall be not less than 20 feet. Row dwellings are defined as a row of two attached dwellings located on a single lot or on a common frontage of a number of adjoining lots, which comprise a continuous structure divided into separate dwellings by one unpierced party or lot-line wall extending from the ground upward to, or through, the roof deck. The entire structure shall be considered as a single building with respect to side yard requirements. If a parcel of land containing, or proposed to contain, row dwellings is divided into lots in such a manner to provide separate lots for separate row dwellings, the party walls shall be centered on the appropriate lot line.

   4.   Bulk Regulations. The following minimum requirements shall be observed:

      A.   Lot Area: Single-family dwellings - 7,000 square feet; two-family dwellings -9,000 square feet. Exception: if the lot is located within the boundaries of the 2013 Central Grinnell Urban Revitalization area then the lot area can be decreased by 10 percent from the minimum requirements, all other bulk regulations shall be met.

      B.   Lot Width: At street line –35 feet; at building line –70 feet. Except the lot width at the building line may be reduced by 25% for a lot where the extensions of the side lot lines intersect with an interior angle of 20 degrees or more and the lot does have a width of 70 feet at some point between the minimum front yard line and the minimum rear yard line established by this chapter.

      C.   Front Yard: 25 feet.

      D.   Side Yard: 8 feet for one story; 10 feet for two stories; 12 feet for three stories; 12 feet for row dwelling/building.

      E.   Rear Yard: 35 feet.

      F.   Maximum Height: Three stories or 35 feet.

      G.   Minimum Building Width: Any building containing dwelling units must be a minimum of 24 feet in building width.