How Tulsa Handles Accessory Structures: A Practical Guide
Tulsa maintains 146 local ordinances across all categories, and 3 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where Tulsa falls on the strict-to-permissive spectrum compared to other cities.
Tiny Homes
Tulsa's Building Code adopts IRC Appendix Q, allowing free-standing tiny houses of 400 square feet or less to meet relaxed ceiling height, stairway, and loft standards instead of full residential code minimums.
Key details: Max floor area: 400 sq ft, lofts excluded. Min ceiling height: 6 ft 8 in, living space. Min loft area: 35 sq ft. Adopted by: Ord. No. 24935 (2022). Enforced by: Development Services Division.
A tiny house built below Appendix Q's minimums, undersized lofts, non-compliant stairs, missing egress openings, fails city inspection, and the Development Services Division will withhold the certificate of occupancy.
Shed & Carport Rules
Detached sheds and other accessory buildings on Tulsa residential lots are capped at 750 sq ft in RE/RS-1 districts or 500 sq ft in RS-2 through RM districts, unless 40% of the house's floor area is larger.
Key details: RE / RS-1 cap: 750 sq ft or 40% of house. RS-2 through RM cap: 500 sq ft or 40% of house. Permit sequence: Zoning clearance before building permit. Enforcing agency: Development Services Division.
Building or expanding a shed without the required zoning clearance and building permit, or exceeding the district's accessory-building size cap, is a Building Code misdemeanor: fines up to $1,200 plus costs, or up to six months in jail, with each day of continued violation a separate offense (Tulsa Revised Ordinances, Title 51, § 113.4).
ADU Rules
Tulsa allows ADUs like garage apartments and carriage houses, but RE, RS, AG, and AG-R lots need Board of Adjustment special exception approval first; other zoning districts allow them by right, capped at one per lot.
Key details: By-right districts: All except RE, RS, AG, AG-R. Special exception needed: RE, RS, AG, AG-R districts. Max ADUs per lot: One. Setback from main house: At least 10 feet behind. Size bonus for ADU building: +500 sq ft above normal cap.
Building or occupying an ADU without the required special exception (in RE/RS/AG/AG-R) or without a zoning clearance and certificate of occupancy is a zoning code violation, enforced through the city's code enforcement and nuisance abatement process; the structure or use can be ordered brought into compliance or removed.
This is one of the stricter rules in Tulsa's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
The Bottom Line
Tulsa's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Tulsa is broadly strict or permissive.
These rules come from Tulsa's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.