Yorba Linda, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)

Municipal Code Section 18.10.090's Table 18.10-2 sets maximum lot coverage, the share of a lot that building footprints may occupy, at 35 percent for the R-A, RLD, R-E and R-S single-family zones. Coverage steps up with density: 40 percent in the R-U zone, 45 percent in the R-M zone, 65 percent in the R-M-20 zone and 70 percent in the R-M-30 zone, tracking the same density progression that runs from one unit per acre in R-A to 30 units per acre in R-M-30. Table footnote 7 layers on a hillside restriction: any residential property with a slope gradient of 15 percent or greater must also comply with the additional development regulations in Chapter 18.30, the City's hillside development standards, which can further limit how much of a sloped lot may be covered regardless of the flat-lot percentage in Table 18.10-2.

Lot coverage is calculated against the minimum lot sizes set in the same table, which range from one acre in R-A down to 7,500 square feet in R-U, so the buildable footprint on an R-A lot can still exceed that of a smaller-lot zone even at the same percentage. Community Development checks proposed lot coverage during building permit plan review, and any approved project that later adds square footage, such as a room addition or accessory structure, must keep the combined footprint within the zone's percentage cap.