§ 154.081 SUBURBAN RESIDENTIAL DISTRICT (R-1).
   (A)   Intent. The Class “R-1” District is intended to provide for the development of single-family, non-farm residential dwellings. It is also intended to provide adequate space for the installation of private well systems and wastewater treatment facilities if access to public or common facilities is not available.
   (B)   Principal uses. The following principal uses shall be permitted in the Class “R-1” District:
      (1)   Single-family dwellings, including summer cottages;
      (2)   Platted subdivisions for single-family only; provided, the development of lots conforms to the density limits specified herein;
      (3)   Churches and other places of worship, including parish houses and Sunday school buildings;
      (4)   Public schools and private schools having equivalent curriculum;
      (5)   Public recreational areas and facilities including parks, playgrounds, golf courses, community centers and similar uses; and
      (6)   Mobile homes converted to real estate.
   (C)   Conditional uses. The following conditional uses shall be permitted in a Class “R-1” District, when authorized in accordance with the requirements of §§ 154.175 through 154.185 of this chapter:
      (1)   Essential governmental structures and uses other than sanitary landfills or uses similar in their scope or effects, when operating requirements necessitate locating in the district; provided that, the premises upon which such use is erected shall be appropriately landscaped, screened and maintained so as to be in harmony with the general appearance of the surrounding area, and not objectionable as to noise, odor, vibration or other disturbances;
      (2)   Railroads, transformer stations, booster stations, utility stations and radio or television transmitter and towers, when operating requirements necessitate locating in the district; provided, there is no yard or garage for service or storage, or any building for general administrative or sales offices; provided that, any substation or building shall meet the front and rear yard requirements for dwellings and shall provide side yards of not less than 25 feet, and that two parking spaces per substation or one per employee at the site be provided; and, further provided that, the premises upon which such use is erected shall be appropriately landscaped, screened and maintained so as to be in harmony with the general appearance of the surrounding area, and not objectionable as to noise, odor, vibration or other disturbances. The minimum lot area and front yard setback may be waived by the Board only on finding that the waiver will not create a detrimental effect on adjacent properties;
      (3)   Private non-commercial recreational areas and facilities including parks, playgrounds, golf courses, country clubs, tennis clubs, swim clubs and similar uses. Miniature golf courses or driving ranges operated for a profit are excluded;
      (4)   Day care nurseries and nursery schools; provided that, for each child there shall be a minimum of 35 square feet of usable floor space, exclusive of washrooms, toilets, kitchens and hallways; and, further provided that, for each child there shall be a minimum of 100 square feet of usable outdoor play space, which space shall be confined to the rear yard of the property and be completely enclosed by a fence;
      (5)   Grading and excavating when development exceeds 5,000 square feet on a site containing 14 to 30% slopes and/or when development exceeds 1,000 square feet on a site containing 30 to 50% slopes, when not associated with a major or minor subdivision plat, subject to the provisions of § 154.066 of this chapter; and
      (6)   Mobile home park; provided that, the installation complies with Iowa Code Chapter 435, as amended; has a water supply and sanitary sewage collection and treatment system approved by the state’s Board of Health; has a minimum area of 3,500 square feet for each mobile home space; has a maximum density of ten units per acre; provides at least ten parking spaces, plus two parking spaces for each mobile home site, that no mobile home shall be closer than 25 feet to any property line of the mobile home park, and that no mobile home shall be closer than 20 feet to another mobile home. Any person, firm or corporation constructing, expanding, remodeling or altering a mobile home park within the county and outside the limits of any incorporated city shall be required to provide a concrete area of not less than 120 square feet per mobile unit for patio. Necessary sidewalks shall be provided from patio to parking area on each mobile home site. It shall be further required that any person, firm or corporation constructing, expanding, remodeling or altering a mobile home park in the county shall, when the mobile home park reaches a population of 40 mobile homes or within five years, provide adequate storm protection for residents of said park with a minimum of five square feet per person occupying said mobile home park.
   (D)   Accessory uses. The following accessory uses shall be permitted in a Class “R-1” District:
      (1)   Accessory uses and structures normally incidental and subordinate to one of the permitted principal or conditional uses, unless otherwise excluded;
      (2)   Private recreational facilities including swimming pools, tennis courts and other recreational facilities commonly accessory to a dwelling;
      (3)   Private parking facilities including garages, carports and other parking spaces;
      (4)   All-weather school bus shelters permitted in the front yard subject to the provisions of §§ 154.051 and 154.052 of this chapter;
      (5)   Bathhouses, tool or storage sheds and non-habitable playhouses when located in the rear yard;
      (6)   Fences, walls and hedges, subject to the provisions of §§ 154.051 and 154.052 of this chapter;
      (7)   Display signs, subject to the provisions of §§ 154.120 through 154.125 of this chapter;
      (8)   Home occupations and home professional offices, subject to the provisions of § 154.060 of this chapter;
      (9)   Gardening and private greenhouses, but not on a scale that would be obnoxious to adjacent lots because of noise, odor or dust; and
      (10)   Parking and storage of major recreational equipment, when located in a completely enclosed building or within a side or rear yard enclosed on all sides with a sight obscuring fence; provided that, such equipment may be parked anywhere on the premises for a period not to exceed 24 hours during loading and unloading; and, further provided that, such equipment shall not be used for dwelling purposes.
   (E)   Off-street parking and loading. Off-street parking and loading spaces shall be provided in accordance with §§ 154.100 through 154.105 of this chapter for permitted principal and conditional uses in a Class “R-1” District.
   (F)   Height requirement. The maximum height of buildings and structures in a Class “R-1” District shall be 35 feet or two and one-half stories, whichever is lower, and an accessory building shall not exceed a height of 16 feet or one and one-half stories, whichever is lower.
   (G)   Setback requirements. The setback requirement for buildings and structures in a Class “R-1” District shall be as follows or a special exception may be required:
 
Use
Setback Requirements
Front
Rear
Side
Side Street, Corner Lot
Yard Abutting Highway or County Road
Churches, schools, other public or institutional buildings
40’
40’
30’
35’
50’
Dwellings and other non-institutional uses
30’
30’
10’
25’
50’
 
   (H)   Lot size and coverage requirements. The minimum lot size and maximum lot coverage for uses in a Class “R-1” District shall be as follows:
Use
Minimum Lot**
Maximum Lot Coverage
Area
Width
Use
Minimum Lot**
Maximum Lot Coverage
Area
Width
Churches, schools, other public or institutional buildings
   Lots with community water and/or sewer
8,400 sq. ft.
70’
35%
   Lots with private septic systems*
15,000 sq. ft.*
70’
35%
Single-family dwellings
   Lots with community water and/or sewer
8,400 sq. ft.
70’
35%
   Lots with private septic systems
15,000 sq. ft.*
70’
35%
NOTES TO TABLE:
*Shall be increased by amount as determined by County Environmental Health Department to provide an adequate absorption field for a septic tank installation.
**Minimum lot size for suburban residential areas now existing (farm buildings either sold off or retained) shall be not less than 1 acre or existing farmsteads; provided, they shall not have been abandoned for 5 years and subject to the regulations of the County Board of Health. If less than 1 acre, a special exception must be obtained either administratively or through the Board of Adjustment.
 
(Ord. passed - -2010)