What are the height guidelines for ADUs in El Cajon?

ADU height can match the zoning of the underlying zone when within primary dwelling unit setbacks, allowing for two-story constructions. Outside these setbacks, height limits are: a) 20 feet with 5-foot setbacks; b) 16 feet with 4-foot setbacks; and c) 12 feet with 3-foot setbacks. Near a major transit stop or high-quality transit corridor, the height is generally capped at 18 feet, with up to 20 feet permissible to align the roof pitch with the primary dwelling. For ADUs on lots with multi-story dwellings, the height limit remains at 18 feet.