Lenexa, KS Building Setbacks & Zoning: Lot Coverage Limits (2026)

Lenexa does not print a lot coverage percentage. Section 4-1-B-26 of the Unified Development Code sets a minimum open space percentage of the lot, which caps how much land buildings and pavement can occupy. Open space is defined as the horizontal land area not covered by principal buildings, accessory buildings or structures, or other substantial improvements such as parking lots.

The residential schedule lists minimum open space by district: AG 90 percent, RE and RP-E 75 percent, R-1 and RP-1 60 percent, RP-2, RP-3 and RP-4 60 percent, and RP-5 40 percent. Minimum lot areas in the same table run from 20 acres in AG and 43,560 square feet in RE and RP-E down to 8,000 in R-1 and RP-1, 3,630 in RP-3, 2,723 in RP-4 and 1,210 in RP-5. The nonresidential schedule sets minimum open space at 25 percent for CP-1 through CP-4, BP-1 and BP-2, and 35 percent for NP-O and CP-O, while HBD lists no figure.

Some areas count toward open space, but they cannot make up more than 50 percent of the open space area: unenclosed swimming pools and hard surface recreational areas, driveways that serve no more than 2 parking spaces, improved recreational facilities on flat roofs, and the unpaved part of the adjacent street right-of-way at its ultimate pavement width.

The schedules are reference summaries. Where they conflict with the district regulations in Sections 4-1-B-4 through 4-1-B-21 or the planned development regulations in Section 4-1-B-27, the district and planned development regulations prevail, so the district text controls for a specific lot. Impervious surface is handled separately for parking: development that provides parking beyond the required standard must mitigate the added impervious surface with storm drainage BMPs under Section 4-1-D-1, and single-family and duplex uses are exempt. The land use buffer tables use an impervious surface ratio, defined as the amount of land covered by buildings and pavement, to rate office and commercial intensity.