Okla. Stat. tit. 42, § 202
As used in this act:
1. "Commercial real estate" means any real estate other than:
b. real estate on which no buildings or structures are located and which is zoned for single-family residential use.
Commercial real estate shall not include single-family residential units such as condominiums, town houses, or homes in a subdivision when sold, leased, or otherwise conveyed on a unit-by-unit basis, even though these units may be a part of a larger building or parcel of real estate containing more than four residential units;
Laws 2006, SB 876, c. 166, § 2, eff. November 1, 2006.