Sioux Falls, SD Accessory Structures: ADU Rental Restrictions (2026)
Key Facts
- Owner-occupancy
- one of the two units required
- Units per lot
- one additional dwelling unit max
- Size cap
- 40% of principal building
- Parking
- 2 off-street spaces required
Summary
Sioux Falls allows a detached accessory dwelling unit on a single-family lot only if the owner lives in one of the two units on the property.
Accessory dwelling units—detached. A. Only one additional single-family dwelling unit is allowed and one of the units must be owner-occupied. B. A minimum of two off-street parking spaces are required.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-135: Current through local ordinance 54-26, passed 7-14-2026).
Full Breakdown
Under the city's Unified Development Code, a detached ADU is a permitted special accessory use on Detached Dwelling forms, but only one additional single-family dwelling unit is allowed per lot and one of the two units, the primary house or the ADU, must be owner-occupied. That blocks running the ADU as a standalone rental while the owner lives elsewhere, and the same owner-occupancy condition repeats across the city's residential Detached Dwelling forms (DD1 through at least DD4). The ADU also can't exceed 40% of the principal building's square footage, must sit in the rear yard, needs two off-street parking spaces, and must be at least 10 feet from the main dwelling.
Violations & Fines
Renting out both the house and the ADU with no owner-occupant violates the accessory-use standard; the zoning administrator can deny or revoke the permitted-special-use approval and require correction before the unit can keep operating as an ADU.
Frequently Asked Questions
Can I rent out my Sioux Falls ADU while renting the main house too?
How big can a detached ADU be in Sioux Falls?
Sources & Official References
Other rules in Sioux Falls
Compare Sioux Falls to another location·View the South Dakota accessory structures overview
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