Roseville processes ADU and JADU applications ministerially under Roseville Municipal Code Title 19 (Zoning Ordinance) and California Government Code §65852.2 and §65852.22. The Development Services Department Planning Division reviews permits with the state-mandated 60-day decision deadline. Detached ADUs may reach 1,200 sq ft and JADUs up to 500 sq ft, with state by-right minimums of 800 sq ft and 16-foot height regardless of underlying zone.
The Roseville Zoning Ordinance in RMC Title 19 implements California state ADU law — including AB 881, SB 13, AB 2221, and AB 976 — through ministerial permit review. Applications go to the Development Services Department Planning Division and are decided on objective standards only, with no public hearings or discretionary findings. State law caps the decision on a complete application at 60 days under Gov. Code §65852.2(b). Detached ADUs are allowed up to 1,200 sq ft; attached ADUs up to 50% of the primary dwelling floor area, with state by-right minimums of 800 sq ft and 16-foot height regardless of underlying zone. The standard side and rear setback is 4 feet for one-story ADUs up to 16 feet tall under Gov. Code §65852.2(a)(1)(D); ADUs taller than 16 feet follow the underlying zone setback. Front and street-side setbacks follow the underlying zone. There is no minimum lot size to establish an ADU or JADU. SB 9 lot-split and two-unit projects on single-family lots are processed ministerially through Title 19 as well. Roseville is served by city-owned utilities — Roseville Electric Utility for power and Roseville Environmental Utilities for water, sewer, and solid waste — and each ADU permit triggers utility-service review for capacity. AB 1033 (2023) condo conversion has not been adopted by the Roseville City Council.
Constructing an ADU without a permit violates RMC Title 19 and the California Building Standards Code (RMC Title 16). Code Enforcement issues stop-work orders under RMC Title 1, double permit fees apply on after-the-fact applications, and the Certificate of Occupancy is withheld until corrections close. Continued occupancy of an unpermitted unit can lead to substandard-housing notices under Cal. Health & Safety Code §17920.3.
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