South Dakota 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 - entirely local control
  • •Only one ADU permitted per property in South Dakota
  • •Rapid City working on ordinance amendments for ADUs (January 2025)
  • •Must comply with local zoning laws and International Residential Code
  • •State adopts amendments to International Residential Code for standardized construction

📖Detailed Analysis

No statewide ADU law - entirely local control with some progressive local developments. Only one ADU permitted per property statewide. Rapid City working on ordinance amendment for Accessory Dwelling Units (January 2025) - ADU defined as second dwelling unit on single family lot with its own facilities. State adopts amendments to International Residential Code, providing standardized construction practices. South Dakota's approach encourages innovation and adaptation, providing flexibility for affordable and sustainable housing solutions. Local approval shaped primarily by municipal zoning codes with significant variation between jurisdictions.

🔗Official Resources

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⚠️ 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.

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Last updated: February 2026