Garage conversion rules in La Habra, CA — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
La Habra allows converting an existing garage into habitable living space primarily through its ADU ordinance (LHMC 18.12.150). A building permit is required, converting a garage without permits is a code violation, and demolished garage parking need not be replaced when the space becomes an ADU.
Converting a garage into living quarters in La Habra is regulated under the Accessory Dwelling Unit standards of LHMC Section 18.12.150. A conversion ADU is permitted through the interior conversion of an existing dwelling or a legally built detached accessory structure such as a garage, and is allowed by-right with a building permit. Conversions generally may not modify the existing footprint, though up to 150 square feet of expansion is allowed where needed for ingress/egress on single-family lots. When a garage or covered parking structure is converted to an ADU, the lost off-street parking need not be replaced. A converted garage must meet California Building Code habitable-space requirements. Converting without permits is unlawful and can bring fines and forced removal.
Converting a garage to living space without a building permit is a code violation subject to enforcement, corrective permits, and possible orders to restore the garage.
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