The purpose of this chapter is to establish standards for accessory structures in Millcreek so that they may be constructed in an orderly way that minimizes impacts.

This Chapter applies to accessory structures in an R-1, R-2, R-4, FRE, MH/TH, MD, MD-3, AG, and RM zones in Millcreek , the utilization of portable shipping containers in the M, MD, MD-3, RM, C-1, C, and IF Zones in Millcreek, and sets additional development standards to those of the governing zoning district.

1. Accessory structures shall be subordinate to the main structure.
2. Location Requirements:
   1. Accessory structures shall only be allowed in a rear yard, or within the side or rear setbacks of the main building on the lot or parcel.
   2. Accessory structures must be located at least six feet (6’) from the main building on the lot.
3. Height:
   1. For residential lots in R-1, R-2, R-4, and AG zones with rear yards that share a boundary with a C-1, C, RM, MD, MD-3, CCOZ, IF, M, or VCSD zone or an institutional building or structure, accessory structures may exceed the height of the main structure, up to a maximum height of 24 feet, provided they are the rear yard.
   2. The maximum height for accessory structures on residential lots or parcels in the RM zone is 20’.
   3. Accessory structures on all other residential lots or parcels shall not exceed 10 percent greater than the height of the main building but are allowed to be at least 14 feet in height.
   4. In no case shall an accessory structure exceed 24 feet in height.
   5. Accessory structures must adhere to the building envelope rules for the underlying zone.
4. Setback Requirements:
   1. Heights Up to Fourteen Feet. Accessory structure must be located at least thirty inches from the side and rear property lines.
   2. Heights Greater than Fourteen Feet. For each inch in height over 14 feet, accessory structures shall be set back from the side and rear property lines an additional inch, up to 12 feet six inches from the side and rear property line.
   3. On lots where the rear yard abuts a public right-of-way, the minimum setback requirement for an accessory structure is 20 feet from the side and rear property lines, unless a noise barrier authorized and constructed by the Utah Department of Transportation or the City separates the right-of-way from the accessory structure.
   4. Accessory structure shall not encroach on any recorded easement.
5. Area Requirements. Accessory structures are limited in size by the total lot or parcel coverage allotted for each zone.
6. Design Standards. Accessory structures that are greater than 200 sf in area shall incorporate at least one of the exterior materials used in the main building for 20 percent of all structure facades, or shall be clad in wood, vinyl, or cementitious fiberboard siding. Accessory structures that are greater than 200 sf in area must have a pitched roof unless the main building has a flat roof, in which case an accessory structure may have a flat roof or a pitched roof.
7. Drainage. Runoff drainage from accessory buildings and structures may not be directed onto adjacent property.
8. Illumination. Illumination of accessory buildings and structures shall be directed down and away from adjoining residences.
9. Accessory structures shall only be used for vehicles or non-commercial uses generated within the property, unless those items are used as part of a licensed home business, pursuant to the standards set forth in MKZ 18.76, Special Business Regulations. Accessory structures shall not be used as dwellings unless permitted as an Accessory Dwelling Unit by the Planning and Zoning Department.
10. Portable shipping containers, semi-trailers, box cars, or relocatable storage containers are subject to the following requirements:
    1. Portable shipping containers, semi trailers, box cars, or relocatable storage containers shall not be permanently installed or maintained on a residential lot, unless they are modified to meet all the design requirements in this chapter.
    2. Portable Shipping Containers. Containers in the M, MD, MD-3, RM, C-1, C, and IF zones may be permitted as a permanent onsite storage use, provided they satisfy the following requirements:
       1. Containers shall not be placed within a required front yard setback or landscaping area.
       2. Containers shall not be placed between a building and the street.
       3. Containers shall be screened from view and/or located 20’ back from the front plane of the building. The preferred location is behind the building or within a screened outdoor storage area or in an alley where sufficient room remains for an emergency vehicle to use the alley.
       4. Containers shall not be placed in the public right-of-way.