Accessory Structures in Casper, WY (2026)
2 verified accessory structures rules for Casper, Wyoming, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Casper Municipal Code § 17.08.010 defines an accessory dwelling unit as a full living unit added to, built within, or detached from a single-family home, but requires the property owner or an immediate family member to occupy either the main house or the ADU. In the R-2 One Unit Residential district, § 17.32.030(J) lists an ADU as a conditional use requiring a Planning and Zoning Commission hearing.
Casper Accessory Dwelling Unit Zoning
Significant RestrictionsCasper Municipal Code §§ 17.08.010, 17.32.030(J)
"Accessory dwelling unit" means a habitable living unit added to, created within, or detached from a single-family dwelling unit that provides basic requirements for living, sleeping, eating, cooking and sanitation. Either the principal dwelling unit or the accessory dwelling unit must be occupied by an owner of the property, or an immediate family member of the property owner. An accessory dwe...
Shed & Carport Rules
Casper Municipal Code § 17.12.121 lets detached garages and accessory buildings, including sheds, go up on residential lots in any zoning district, but a building permit kicks in at one hundred twenty square feet, and anything smaller still needs a fence/accessory building permit. Rear setbacks run five feet, dropping to one foot for small sheds under that threshold.
Casper Shed and Accessory Building Rules
Some RestrictionsCasper Municipal Code § 17.12.121(C), (F)
C.A building permit is required for buildings one hundred twenty square feet in area and over as measured at the maximum exterior wall dimension. One story detached accessory buildings used as tool and storage sheds, playhouses and similar uses that measure under one hundred twenty square feet in area as measured at the maximum exterior wall dimension require a fence/accessory building permit. ...