Wyoming ADU Laws

Complete 2026 guide to accessory dwelling unit regulations

○Local Control Only

📋Quick Facts

Owner Occupancy
May be required
Parking
Set locally
Approval Process
Varies locally

⚠️Key Requirements & Restrictions

  • •No statewide ADU law - county and municipal control only
  • •ADUs only permitted in some counties: Campbell, Park, Sheridan, Sublette, Sweetwater
  • •Cheyenne removed owner-occupancy requirements (February 2026)
  • •Campbell County allows ADUs in residential zones with restrictions
  • •Laramie County has ADU guidance documents

📖Detailed Analysis

No statewide ADU law - entirely local control with limited adoption. Only some counties permit ADUs: Campbell, Park, Sheridan, Sublette, Sweetwater. Cheyenne recently removed owner-occupancy rules (February 2026) and clarified definitions of accessory vs semi-attached dwellings. Campbell County allows ADUs in residential subdivisions with restrictions. Most rural/conservative approach among Western states - many counties don't allow ADUs at all. Wyoming represents least ADU-friendly Western state, contrasting sharply with progressive neighbors like Colorado, California, and even moderate approaches in Idaho/Nevada.

🔗Official Resources

Planning an ADU in Wyoming?

Use our free tools to analyze your investment opportunity and plan your build.

💰 ROI Calculator✓ Project Checklist
📬

Get Wyoming ADU Law Updates

Laws change fast. Get notified when regulations update in your area.

Browse all states

⚠️ Disclaimer

The information provided on this website is for general informational purposes only and does not constitute legal, financial, or professional advice. ADU laws, regulations, and requirements vary by jurisdiction and change frequently. While we strive to keep this information accurate and up-to-date, we make no representations or warranties of any kind about the completeness, accuracy, reliability, or suitability of this information. Always consult with qualified local professionals, including attorneys, architects, and your local planning department, before making any decisions regarding ADU construction or investment. Use of this information is at your own risk.

ADU Tools by MassDwell

Last updated: February 2026