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

Lot coverage counts everything projected onto a horizontal plane: the footprint of enclosed walls, roofed accessory structures, and any deck, porch, stair or landing that covers an enclosed space or paved ground, plus pergolas and trellises, under BMC section 23.106.020(A). The code excludes uncovered porches, landings and stairs; uncovered decks unless on a roof or over enclosed space; the roof of a subterranean structure sitting 3 feet or less above finished grade; the first 24 inches of any eave; and the floor area of an accessory dwelling unit or junior ADU up to 800 square feet per lot.

Table 23.202-2 sets the R-1 district's maximum lot coverage at 60 percent, tied to the number of stories in the main building. The R-1H hillside variant of the same district, covered in Table 23.202-3, cuts that ceiling to 40 percent because of steeper grades and drainage concerns in the Berkeley Hills. Section 23.304.120 makes the cap absolute citywide: a lot may not exceed the maximum lot coverage required in its district except where the Zoning Ordinance specifically allows it, and the only listed exception covers solar energy equipment and wheelchair ramps or lifts, which may exceed the otherwise-maximum coverage.

Coverage is checked at the Zoning Certificate stage administered by the Planning and Development Department's Zoning Officer before a building permit issues; a project that cannot meet the table's percentage needs discretionary approval rather than a routine over-the-counter sign-off.