ADU rules in Tulsa County, OK — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
The Tulsa County Zoning Code (2024) Section 8 addresses accessory dwelling units and accessory storage in unincorporated areas. ADU regulations vary by zoning district. In AG districts, additional dwellings for agricultural workers may be permitted. Building permits are required from County Inspections. The Board of Adjustment may grant special exceptions for ADUs.
Oklahoma has no statewide ADU mandate. Tulsa County regulates accessory dwelling units through local zoning. Oklahoma City and Tulsa have adopted ADU-friendly zoning amendments in recent years. Common conditions: maximum size (typically 600 to 800 sq ft), setback requirements, owner-occupancy may be required. Building permits required for any habitable structure. Storm shelter/safe room may be a consideration for ADU design. HOAs may restrict or prohibit ADUs.
Unpermitted ADU: standard building code enforcement. May require demolition or legalization. Occupying unpermitted dwelling: code violation.
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See how Tulsa County's adu rules rules stack up against other locations.
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