168.02 RESIDENTIAL DISTRICTS.

   1.   RS Districts Defined.

      A.   RS-3 Single-Unit Residence District. The RS-3 District is intended to provide and maintain low-density single-unit residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RS-3 District.

(Ord. 2023-26 – Jan. 24 Supp.)

      B.   RS-4 Single-Unit Residence District. The RS-4 District is intended to provide and maintain low-density single-unit residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RS-4 District.

      C.   RS-6 Single-Unit Residence District. The RS-6 District is intended to provide for and maintain moderate density single-unit residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RS-6 District.

      D.   RS-7 Single-Unit Residence District. The RS-7 District is intended to provide for and maintain moderate to high-density single-unit residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RS-7 District.

      E.   RS-8 Single-Unit Residence District. The RS-8 District is intended to provide for and maintain moderate to high-density single-unit residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RS-8 District. The use of the RS-8, Single-Unit Residence District shall be limited to the existing RS-8 Districts within the City, primarily designated as the original town of North Liberty bounded by Zeller Street, Dubuque Street, Penn Street, and Stewart Street. The use of the RS-8 Zoning District for any new development within the City is discouraged as being incompatible with the desired design standards for the City.

      F.   RS-9 Single-Unit Residence District. The RS-9 District is intended to provide for and maintain high-density single-unit residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RS-8 District.

   2.   RD Districts Defined.

      A.   RD-8 Two-Unit Residence District. The RD-8 District is intended to allow for attached single-unit dwellings joined together on a common boundary line with a common wall between the units. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RD-8 District.

      B.   RD-10 Two-Unit Residence District. The RD-10 District is intended to allow for attached single-unit dwellings joined together on a common boundary line with a common wall between the units. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RD-10 District.

   3.   RM Districts Defined.

      A.   RM-8 Multi-Unit Residence District. The RM-8 District is intended to provide and maintain medium-density, multiple-unit housing residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RM-8 District.

      B.   RM-12 Multi-Unit Residence District. The RM-12 District is intended to provide and maintain medium-density, multiple-unit housing residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RM-12 District.

      C.   RM-21 Multi-Unit Residence District. The RM-21 District is intended to provide and maintain high-density, multiple-unit housing residential neighborhoods. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the RM-21 District.

   4.   R-MH Residential Manufactured Home District Defined. The R-MHP District is intended to accommodate manufactured home parks, which are areas containing manufactured home sites arranged on a large tract, typically under single ownership, and designed to accommodate manufactured homes. Limited non-residential uses that are compatible with the surrounding residential neighborhoods may be permitted in the R-MH District.

   5.   Dimensional Standards.

      A.   RS Districts.

Table 168.02-A Dimensional Standards SF = Square Feet, ‘ = Feet
	RS-3	RS-4	RS-6	RS-7	RS-8	RS-9
Bulk
Minimum Lot Area	15,000 SF	10,000 SF	7,000 SF	6,000 SF	5,000 SF	4,500 SF
Minimum Frontage	50’	40’	35’	35’	35’	35’
Minimum Lot Width	100’	80’	70’	60’	60’	40’
Maximum Building Height	35’	35’	35’	35’	35’	35’
Setbacks
Minimum Required Front Yard	25’	25’	25’	20’	20’	25’
Minimum Required Corner Side Yard	25’	25’	25’	20’	20’	25’
Minimum Required Side Yard	10’	10’	8’	5’	5’	5’
Minimum Required Rear Yard	30’	30’	30’	25’	25’	25’

 

      B.   RD and RM Districts.

Table 168.02-B Dimensional Standards SF = Square Feet, DU= Dwelling Unit, ‘ = Feet
	RD-8	RD-10	RM-8	RM-12	RM-21
Bulk
Minimum Lot Area	10,000 SF 5,000 SF/DU	9,000 SF 4,500 SF/DU	21,780 SF 5,000 SF/DU	21,780 SF 3,500 SF/DU	21,780 SF 2,000 SF/DU
Minimum Frontage	40’	35’	75’	50’	50’
Minimum Lot Width	100’	80’	100’	80’	80’
Maximum Building Height	35’	35’	40’	40’	65’*
Setbacks
Minimum Required Front Yard	25’	25’	25’	25’	25’*
Minimum Required Corner Side Yard	25’	25’	25’	25’	25’*
Minimum Required Side Yard	10’	10’	15’	15’	10’*
Minimum Required Rear Yard	30’	30’	30’	30’	30’
*An additional foot of setback is required for every foot of building height over 45’

(Ord. 2023-26 – Jan. 24 Supp.)

      C.   R-MH District.

Table 168.02-C Dimensional Standards SF = Square Feet, ‘ = Feet
	Manufactured Home Park	Manufactured Home Site
Bulk
Minimum Lot Area	10 acres	5,500 SF
Minimum Frontage	400’	35’
Minimum Lot Width	500’	50’
Maximum Building Height	--	35’
Minimum Separation Distance	--	15’ as measured between the walls of manufactured homes
Setbacks
Minimum Required Front Yard	25’	20’
Minimum Required Corner Side Yard	25’	20’
Minimum Required Side Yard	25’	--
Minimum Required Rear Yard	25’	25’

 

   6.   District Specific Design Standards.

      A.   RS-7 Single-Unit Resident District. The RS-7 District shall be subject to the following:

         (1)   Planned Area Development submittal.

         (2)   A variety of housing designs are required. A Planning Commission subcommittee will be created to review all elevations of proposed home design before building permits are issued. If the subcommittee does not approve of an elevation, the applicant may appeal to the Commission for final approval.

         (3)   Alleys are preferred. A homeowners association will be responsible for maintenance of alleys.

         (4)   One two-inch caliper tree will be required in the front yard of each lot within the RS-7 District.

         (5)   One two-inch caliper tree will be required in the corner side yard of each lot within the RS-7 District.

         (6)   A minimum of 25 percent of the development shall be reserved as open space.