The zoning districts are established for the specific purposes provided below:

1. RR rural residence district and SRR shoreland rural residence district. These are low-density residential districts in areas where city water and sewer services are generally not available and primarily intended to accommodate traditional single-family detached dwellings. Clustering may be allowed by PUD according to the densities established herein. For uses permitted by right, refer to section 30-512. The SRR districts are subject to additional shoreland management standards.
2. R-1 one-family residence district and SR-1 shoreland one-family residence districts. These are low density residential district which are primarily intended to accommodate traditional single-family detached dwellings. Clustering may be allowed by PUD according to the densities established in this division. For uses permitted by right, refer to section 30-512. The SR-1 districts are subject to additional shoreland management standards.
3. R-1a one-family residence district (small lot) and SR-1a shoreland one-family residence district (small lot). These are more compact, low-density residential districts which are primarily intended to accommodate traditional single-family detached dwellings that meet the housing needs of the city. These districts accommodate single-family detached dwellings on smaller lots in established neighborhoods or new development areas which have access to municipal sewer and water. Clustering may be allowed by PUD according to the densities established herein. For uses permitted by right, refer to section 30-512. The SR-1a districts are subject to additional shoreland management standards.
4. R-2 one- and two-family residence district and SR-2 shoreland one- and two-family residence districts. These are low density residential district that generally correlate with the existing close in neighborhoods that were originally divided into town size lots. While they are primarily for single-family detached dwellings at densities slightly higher than the R-1 district, they are also intended to be used for twin homes or two-family dwellings in other areas of the city designated by the comprehensive plan for low density residential development. They may also serve a transitional function in sensitive areas along major streets and railroad tracks and in areas where the land use changes from high to low intensity, e.g., commercial to single-family residential. In such locations, rental housing at low densities may offer a more feasible alternative than owner occupied housing. Such zoning would allow the conversion of existing and the construction of new dwellings provided all district development regulations are met. Refer to the tables in section 30-512, district development regulations. For uses permitted by right refer to section 30-512. The SR-2 districts are also subject to shoreland management standards.
5. R-3 multiple-family residence district (medium density) and SR-3 shoreland multiple-family residence district (medium density). These are modest density residential districts that are primarily intended to provide families with efficient alternatives to traditional single-family living. They are intended to provide for a variety and a mixture of multiple-family housing including townhouses, condominiums, apartments and other group housing types. They are also intended to provide recreation amenities and group usable open space within each project or development. For uses permitted by right refer to section 30-512. The SR-3 districts are also subject to shoreland management standards.
6. R-4 multiple-family residence district (high density) and SR-4 shoreland multiple-family residence district (high density). These are generally higher density districts which are primarily intended to accommodate condominiums and apartments for the full range of contemporary families including singles, couples, empty nesters, single headed families, etc. These, too, are intended to provide a variety of housing opportunities, with recreation and open space amenities, for people of all income and age groups. For uses permitted by right refer to section 30-512.
7. LB limited business district and SLB shoreland limited business district. These districts are primarily transitional in nature in that they generally occur where residential and commercial uses must necessarily interface. Because they intend to correlate with existing residential areas, these districts accommodate a wide range of residential uses plus office, cultural, small specialty retail and other uses that are generally compatible with intense commercial areas and surrounding residential areas. For uses permitted by right refer to section 30-512. The SLB districts are also subject to shoreland management standards.
8. GB general business district and SGB shoreland general business district. These districts are intended to accommodate a broad range of retail goods and services, land uses and generally serve the entire community. Though not exclusively so, businesses in this district are relatively freestanding and tend to occupy independent building sites. They may enjoy close proximity to like businesses but depend primarily on good accessibility, high visibility and a relatively large volume of passing traffic. For uses permitted by right refer to section 30-512. The SGB districts are also subject to shoreland management standards.
9. CBD central business district. This district correlates only with the downtown area of the city and is intended to serve a regional clientele. It is highly diversified and intended to offer the full array of high value comparison goods and services; hotel, cultural, tourist and entertainment services; high density residential; finance; general office and public uses. Because the CBD is a very high use intensity zone, is fully developed, much of which occurred prior to the existence of zoning regulations, and is an area that requires the city to play a role in the provision of parking, normal parking, yard and lot requirements do not apply. For uses permitted by right refer to section 30-512.
10. MU mixed use district and SMU shoreland mixed use district. These districts are intended to accommodate a mix of residential, retail, office and public uses. Developments within this district are encouraged to use creative arrangements to incorporate a variety of uses into an integrated plan that are compatible with surrounding land uses. Developments should incorporate features to encourage pedestrian activity, such as an interconnected street pattern, sidewalks, smaller blocks and public gathering spaces. For uses permitted by right refer to section 30-512. The SMU districts are also subject to shoreland management standards.
11. M medical district and SM shoreland medical district. This district is intended to accommodate the development of medical, office, multifamily residential and related uses in the area surrounding the hospital medical complex. This may be a transitional area, and it is expected that the existing one- and two-family dwellings in the area will be replaced with more intensive uses. Development should be characterized with large lots and high landscaping standards. For uses permitted by right refer to section 30-512. The SM districts are also subject to shoreland management standards.
12. RC recreational commercial district and SRC shoreland recreational commercial district. These districts reserve specific areas for commercial recreational uses, whether publicly or privately owned, such as shooting ranges, ATV parks, game farms and golf courses. For uses permitted by right refer to section 30-512. SRC districts are also subject to shoreland management standards.
13. BP business park district and SBP shoreland business park district. These areas are primarily small and lower intensity industrial uses, commercial land uses that are similar to wholesale businesses and businesses that have a mix of uses such as; office and back office operations, storage, assembly, and limited types of retail. BP/SBP areas include businesses that are inappropriate for industrial parks, but create few synergies by being located with retail establishments, including small wholesale businesses, back-office operations, mail-order operations, materials suppliers, and professional offices.
14. I-1 industrial park district and SI-1 shoreland industrial park district. These are planned industrial districts that are intended to accommodate new, modern, high performance, low impact industrial uses in a park-like setting. They allow a full range of industrial activities plus support services but allow only limited sales of goods and services directly to the public. For uses permitted by right refer to section 30-512. SI-1 districts are also subject to shoreland management standards.
15. I-2 general industrial park district and SI-2 shoreland general industrial park district. These districts generally correlate with the older existing industrial areas of the city and accommodate freestanding industrial buildings. These may be used for new industrial developments that are so designated by the city comprehensive plan provided all performance standards and extraordinary requirements are met with regard to R district relationships. For uses permitted by right refer to section 30-512. The SI-2 districts are also subject to shoreland management standards.
16. CD conservancy district. These districts are established to preserve and protect open space including lakes, streams, wetlands, marshes, woodlands and similar areas of natural, aesthetic and scenic value.
17. PU public use district and SPU shoreland public use district. The public land use districts are primarily intended to be used for major public and quasipublic uses of land as set forth in the comprehensive plan. They are also intended to accommodate major essential public facilities that provide governmental, educational, recreational, cultural and health care services to the entire community. For uses permitted by right refer to section 30-512. The SPU districts are also subject to shoreland management standards.
18. AG agricultural district. These districts are intended to allow for the continuation of agricultural practices and activities especially in areas that may be annexed to the city where public services are not yet available, an alternative use is not imminent and the owner desires to continue to farm the land. For uses permitted by right refer to section 30-512.
19. AP airport district. This is a highly specialized district that encompasses that part of the city airport property which is exclusively used for air transportation and related or complementary uses. For uses permitted by right refer to section 30-512 and article III of this chapter.

(Code 1978, § 23.5(E); Ord. No. 07-03-06, § 2(Exh. A), 3-27-2007; Ord. No. 12-06-07, Exh. A, 6-11-2012)

MINIMUM YARD SETBACKS

Required Plant Materials per 100 Linear Feet (from each category)

^{* Fence required only when off-street parking area abuts a residential zone and fences are required only when an off-street parking area is situated abutting a residential zone and located within 25 feet of a residential zone property line. The fence shall not be less than 3½ feet high nor more than six feet high, and located within 25 feet of a residential zone property line. The fence shall not be less than 3½ feet nor more than six feet in height, and shall have an opacity of not less than 90 percent. No parking lot fencing shall be required in a required front yard or street side yard. ** In addition to the parking lot fence requirements for a type E bufferyard, a fence shall be required only on the common lot line(s) or lot lines adjacent to an alley, but shall not extend into the required front yard. The fence shall have an opacity of not less than 90 percent, and shall be six feet high, unless otherwise required in this article.}

^{NOTE: This listing is not necessarily inclusive of all the plant species that would be acceptable in the city. It is intended to be illustrative of the types of plants that grow well here. Contact a qualified landscaper or nursery professional for more information.}