An ADU in Riverside requires a building permit issued ministerially (no discretionary review) and must be approved or denied within 60 days of a complete application, per California Government Code §66317 and RMC Chapter 19.442.
Applications are submitted to the City of Riverside Community & Economic Development Department (CEDD) using the standard ADU/JADU plan-check packet referenced on the CEDD ADUs/JADUs program page. Plans must demonstrate compliance with RMC §19.442.030 (size, setbacks, height), the California Building Code, California Residential Code, fire-sprinkler rules where required, and utility-connection standards. Under Gov. Code §66317 the city must act on a complete ADU application within 60 days; failure to act constitutes approval. JADUs converted entirely within an existing single-family dwelling require a deed restriction recorded against the property prohibiting sale separate from the primary residence (Gov. Code §66333).
Constructing or occupying an ADU without a permit triggers a stop-work order from the Building Official under California Building Code §114 and RMC §16.04. Civil penalties under RMC §1.17 begin at $100 and escalate; the property owner is also required either to obtain a retroactive permit (with double plan-check fees per the City's adopted Fee Schedule) or remove the structure.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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