Perris, CA Accessory Structures: Garage Conversions (2026)

060. A converted-space ADU is allowed in any zoning district that permits a single-family residence, and a lot can carry one primary dwelling, one converted existing space ADU, one detached ADU, and one JADU at the same time, so a garage conversion does not use up the right to also build a detached unit or a JADU. The unit must be at least 320 square feet, and the code sets no upper size limit, but the converted space has to stay within the existing or proposed floor area of the primary dwelling; the city allows the building envelope to grow by up to 150 square feet solely to add a new, separate entrance to the converted unit.

090(7)(a) says the parking for the primary dwelling does not have to be replaced, and the ADU itself is not required to provide any parking at all. 060 still apply: fire sprinklers are required if the primary house already has them, a separate bathroom with sink, toilet and shower is mandatory, a kitchen is required, and the unit needs an exterior entrance separate from the primary dwelling's. The whole ADU chapter, including this section, was rewritten by Ordinance No. 1449 (§ 4, Att. A), adopted February 11, 2025, to track current state ADU law under Government Code §§ 66310-66342; where a Perris standard is more restrictive than that state law, the state standard controls the outcome.