Accessory Structures in Oklahoma City, OK

If you live in Oklahoma City or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Oklahoma City has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

ADU Rental Restrictions

Oklahoma City accessory dwellings can't be rented as a separate long-term unit: under § 59-9350.2.1.G.2, they can only be used for home sharing/short-term rental, and only while the host lives in the primary residence on the same parcel.

Key details: Permitted rental use: Home sharing/short-term rental only. Occupancy condition: Host must live in primary home. Otherwise required: Board of Adjustment special exception. Governing section: § 59-9350.2.1.G.2.

Renting an ADU without owner-occupancy or a Board of Adjustment special exception is a Class "a" zoning offense under § 59-4350.2: each day counts as a separate violation, escalating to Class "b" on a third conviction.

This is not one of those rules that cities tend to ignore. Oklahoma City actively enforces its adu rental restrictions requirements.

ADU Rules

Oklahoma City Ordinance 27847 amended Chapter 59 (Zoning) to allow Accessory Dwellings as a conditional use in R-1, R-2, R-3, and R-4 residential districts. Maximum floor area is 950 sq ft, with one ADU per parcel. Manufactured homes are prohibited as ADUs.

Key details: Ordinance: 27847 (Ch. 59 amendment). Districts: R-1, R-2, R-3, R-4. Max Floor Area: 950 sq ft. Max Height: 25 ft or Primary, lesser. Parking: 1 space (waivers apply).

Constructing an ADU without a Conditional Use approval or building permit triggers stop-work orders and Chapter 59 enforcement by OKC Development Services. Subdividing the ADU from the principal lot ownership violates the use standard.

Shed & Carport Rules

Oklahoma City requires a building permit for any carport and caps width at 12 feet for a single driveway or 24 feet for a double, with a 5-foot minimum setback from the front property line.

Key details: Permit required: Building permit before construction. Single driveway width cap: 12 feet, eave to eave. Double driveway width cap: 24 feet, eave to eave. Front setback minimum: 5 feet from property line. Open sides required: 2 sides, 3 if in front yard.

Building a carport without a permit, exceeding the 24-foot width cap, or placing it closer than 5 feet to the front property line is a code violation subject to a stop-work order and permit fees.

Garage Conversions

Oklahoma City's zoning code requires two off-street parking spaces plus a garage for every single-family and two-family home, so converting your garage into a bedroom or den without replacing that garage space breaks the parking requirement.

Key details: Parking standard: 2 spaces per unit + garage. Applies to: Single-family and two-family dwellings. Permit required: Before any conversion work begins. Violation class: Class "a" offense, per day.

Working without a permit or leaving the lot short of its required garage is a Class "a" offense under Section 12-57, with each day of continued violation charged as a separate offense.

ADU Owner Occupancy

Building or living in an accessory dwelling in Oklahoma City carries no owner-occupancy mandate, but renting it out short-term does require the owner to live in the main house.

Key details: Owner-occupancy to build/live: Not required. Owner-occupancy for STR use: Required (host's primary residence). STR approval needed: Board of Adjustment special exception. Governing section: § 59-9350.2.1(G)(2). Max ADUs per parcel: One.

Renting an accessory dwelling short-term without the required owner-occupied primary residence, or without the Board of Adjustment special exception under § 59-9350.38.1, is an unpermitted use subject to City zoning enforcement.

The Bottom Line

Oklahoma City'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 Oklahoma City is broadly strict or permissive.

This guide is based on Oklahoma City's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.