Accessory Structures in Wyoming (2026)
4 rules on the books across Wyoming, 2 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
ADU Rules
Rules for building accessory dwelling units (granny flats, in-law suites) including size limits, parking requirements, and owner-occupancy rules.
Casper
Significant RestrictionsCasper Municipal Code § 17.08.010 defines an accessory dwelling unit as a full living unit added to, built within, or…
Read full rule →Cheyenne
Some RestrictionsCheyenne caps accessory dwelling units at one per detached single-unit lot, limited to 40% of the main home's size or…
Read full rule →Shed & Carport Rules
When a storage shed or carport needs a permit, the square-footage exemption thresholds, and the setback and height limits that apply either way.
Casper
Some RestrictionsCasper Municipal Code § 17.12.121 lets detached garages and accessory buildings, including sheds, go up on residential…
Read full rule →Cheyenne
Some RestrictionsCheyenne's zoning code requires an existing home on the lot before a shed or other accessory building can be permitted…
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