Mission Viejo limits lot coverage (the percentage of a lot covered by structures) in residential zones, typically to 40-50% depending on the zone. All roofed structures count toward lot coverage including the main house, garage, ADUs, covered patios, and accessory structures.
The Mission Viejo zoning ordinance establishes maximum lot coverage ratios for residential zones, typically limiting structures to 40-50% of the total lot area. Lot coverage includes all roofed structures: the main dwelling, attached and detached garages, ADUs, covered patios, pergolas with solid roofing, and accessory structures. Open lattice or trellis structures may be partially counted depending on the percentage of solid coverage. Uncovered decks, patios, driveways, and walkways generally do not count toward lot coverage but may be regulated separately under impervious surface standards. Swimming pools do not count toward lot coverage. California ADU law may override local lot coverage limits for qualifying ADU projects — an 800 square foot ADU is allowed regardless of lot coverage if the lot is otherwise developed. Lot coverage calculations are verified during the building permit review process. Many Mission Viejo HOAs have their own architectural standards that may impose additional open space requirements. Contact the Planning Division at (949) 470-3053 for lot coverage calculations.
Exceeding lot coverage limits is a zoning violation. Building permits will not be issued for projects that exceed the maximum coverage. Unpermitted construction that exceeds lot coverage may require removal. Variances from the Planning Commission are required for projects exceeding the limit.
Mission Viejo, CA
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Side-by-side rule comparisons with other cities in Orange County.
See how other cities in Orange County handle lot coverage limits.
See how Mission Viejo's lot coverage limits rules stack up against other locations.
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