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

050 sets 'Maximum lot coverage' at 35 percent for the R-1A one-family district and 30 percent for both R-1B and R-1C. G defines lot coverage as the ratio of the net footprint area of all roofed structures on a lot to the net lot area, and it excludes several features from the footprint count before the percentage is checked: eaves and roof overhangs that project up to two feet, trellises and similar structures that are at least 50 percent open to the sky, patios and landings that are at least 50 percent open to the sky, and unenclosed stairways.

That means a covered patio with open lattice sides, or a roof overhang within the two-foot allowance, doesn't push a lot over its 35 or 30 percent ceiling the way a fully enclosed addition would. The coverage cap applies on top of, not instead of, the yard setbacks and floor-area-ratio limits in the same table, so adding a garage, sunroom or accessory structure has to satisfy all three at once. F, so a flag lot's narrow access strip doesn't inflate the area available for roofed coverage.

Plans are checked against the table by the Community Development Department before Building & Safety will issue a permit for new construction or an addition.