Norman, OK Building Setbacks & Zoning: Lot Coverage Limits (2026)

NCC 36-514 sets the area regulations for Norman's R-1 Single-Family Dwelling District, and its impervious area provision functions as the city's lot-coverage cap for standard single-family lots. The rule limits total impervious area, defined to include all buildings and permanently paved surfaces, to 65 percent of the lot. Within that overall cap, a narrower rule targets the front yard specifically: paving for required off-street parking under NCC 36-548, along with other impervious surfaces, cannot exceed 50 percent of the required 25-foot front yard, and any front-yard paving also has to comply with NCC 36-550(a)(3)'s landscaping standards.

The code allows that front-yard impervious percentage to rise to 70 percent, but only when one of three specific circumstances applies: the driveway is needed to access a garage built for three or more cars, the driveway forms part of a circular driveway that includes a landscaped separation from the sidewalk, or the driveway sits on a cul-de-sac lot with less than 40 feet of frontage. R-1 also caps the minimum lot area at 6,000 square feet and limits construction to one principal dwelling plus one accessory dwelling unit per lot, both of which interact with the coverage cap to shape how much building footprint a given parcel can support.

Builders and homeowners planning additions, garages, patios, or expanded driveways in an R-1-zoned lot need to check running impervious totals against both the 65 percent citywide figure and the separate front-yard percentage before adding new paved or roofed area.