ADU Rules in Bixby, Oklahoma

Bixby, nicknamed the "Garden Spot of Oklahoma" for its historically fertile bottomland agriculture, has undergone a dramatic transformation from a small farming community to one of the fastest-growing suburbs in the Tulsa metropolitan area. Located in Tulsa County along the Arkansas River's eastern bank, Bixby's population has grown rapidly over the past two decades as Tulsa families seek newer housing in a community with highly rated schools and a suburban character. The city's rapid growth has produced extensive new residential subdivision development across its landscape.

Oklahoma — No Statewide ADU Law

Oklahoma has no statewide ADU preemption law. ADU regulations in Bixby are governed entirely by the city's local zoning ordinance, administered by the Bixby Planning & Development Department. There is no state mandate requiring Bixby to permit ADUs by right.

Permitted ADU Types

In Bixby's residential zone districts, ADUs may be permitted in forms including:

• Detached ADUs — freestanding structures in the rear or side yard
• Attached ADUs — additions connected to the primary dwelling
• Garage conversions — converting an existing attached or detached garage
• Interior conversions — creating a separate unit within the existing home

Bixby's newer subdivision developments typically have larger lot sizes with substantial rear yards, which can accommodate detached ADUs if dimensional standards are met. Older areas of Bixby may have smaller lots with more constrained yard space.

Size and Dimensional Standards

Dimensional standards in Bixby vary by zone district. General considerations include:

• Maximum ADU size: Typically limited by local code; verify current limits with Planning & Development
• Rear setback: Minimum 5 feet from rear property line (typical)
• Side setback: Minimum 3–5 feet from interior side property lines (typical)
• Height: Detached ADUs generally limited to one to one-and-a-half stories
• Lot coverage: Combined footprint must not exceed zone maximum

Verify all standards directly with the Bixby Planning & Development Department, as standards in fast-growing communities evolve frequently.

HOA Covenants and Deed Restrictions

Bixby's rapid growth has been driven largely by planned subdivision developments, the majority of which are governed by homeowners associations (HOAs) with restrictive covenants recorded in the property deed. HOA covenants frequently restrict or prohibit ADU construction independently of city zoning. A city zoning permit does not override HOA deed restrictions.

Before investing in ADU plans:

1. Obtain a copy of your subdivision's Declaration of Covenants, Conditions, and Restrictions (CC&Rs) from your HOA or the Tulsa County Clerk's office.
2. Review HOA rules regarding accessory structures, secondary dwelling units, and rental use.
3. If required, obtain HOA architectural committee approval before applying for city permits.

Arkansas River Floodplain

The Arkansas River borders Bixby to the west. Properties within or near the Arkansas River floodplain may be within FEMA-designated Special Flood Hazard Areas. Floodplain development requires compliance with Bixby's floodplain management ordinance, including elevation of new construction above the Base Flood Elevation (BFE). Verify your parcel's flood zone status using FEMA's Flood Map Service Center.

Tornado Risk

Bixby is in Tornado Alley. Storm shelter access is strongly recommended for new residential construction. Verify current storm shelter requirements with Bixby's Building Division and consider a FEMA-rated safe room.

Permit Process

1. Review HOA documents — Check CC&Rs for ADU restrictions before any other step.
2. Zoning verification — Contact Bixby Planning & Development to confirm your zone and ADU eligibility.
3. Flood zone check — Review FEMA maps for Arkansas River floodplain status.
4. HOA approval — Obtain architectural committee approval if required by your HOA.
5. Prepare construction documents — Plans meeting Oklahoma building codes.
6. Permit application — File with Bixby Planning & Development / Building Division.
7. Plan review and permit issuance.
8. Required inspections and certificate of occupancy.

Contact Information

City of Bixby Planning & Development 116 W. Needles Avenue, Bixby, OK 74008 Website: bixbyok.gov

Disclaimer: Oklahoma has no statewide ADU law. HOA deed restrictions in Bixby's many planned subdivisions may prohibit ADU construction independently of city zoning — always review your CC&Rs first. This page is for informational purposes only and does not constitute legal or planning advice.