ADU rules in Owasso, OK — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Owasso Zoning Code regulates accessory dwelling units through its local zoning ordinance (Ordinance 1131). ADUs may be permitted in certain residential districts subject to local planning department approval. Detached accessory buildings in residential rear yards cannot cover more than 20% of the minimum required rear yard and total floor area cannot exceed 500 sq ft. Contact Planning at (918) 376-1540 for ADU eligibility.
Oklahoma has no statewide ADU mandate. Owasso 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.
Owasso, OK
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Side-by-side rule comparisons with other cities in Tulsa County.
See how other cities in Tulsa County handle adu rules.
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