Garage Conversions: Chino vs Rancho Cucamonga
How do garage conversions rules compare between Chino, CA and Rancho Cucamonga, CA?
Chino and Rancho Cucamonga have similar restriction levels.
Chino, CA
San Bernardino County
California Gov. Code §65852.2 (now re-codified by SB 477 at Gov. Code §66310 et seq.) preempts local bans on converting an existing garage into an Accessory Dwelling Unit. Chino adopted a conforming ADU ordinance on March 17, 2020 (Chino Municipal Code Title 20). Garage-to-ADU conversions are permitted ministerially, replacement parking is NOT required when a garage is converted to an ADU, and approval must be issued within 60 days of a complete application.
View full Chino rules →Rancho Cucamonga, CA
San Bernardino County
Garage conversions to ADUs are protected under CA Gov Code 65852.2 and are streamlined in Rancho Cucamonga. Replacement parking is not required, but permits, egress, and insulation upgrades are mandatory.
View full Rancho Cucamonga rules →Key Facts Comparison
| Fact | Chino | Rancho Cucamonga |
|---|---|---|
| State preemption | Gov. Code §65852.2 (now §66310 et seq. per SB 477) — local bans preempted | - |
| Chino ADU ordinance | Adopted March 17, 2020, CMC Title 20 | - |
| Replacement parking | NOT required when garage converts to ADU | - |
| Approval timeline | 60 days ministerial review of complete application | 60 days ministerial under state law |
| Owner occupancy | Not required for ADUs permitted 1/1/2020 – 1/1/2025 | - |
| No replacement parking | - | Required by Gov Code 65852.2 |
| Permits needed | - | Building, plumbing, electrical, mechanical |
| Egress | - | 5.7 sq ft openable window in each bedroom |
| Impact fees | - | Waived for ADUs under 750 sq ft |
Highlighted rows indicate differences between cities.
Chino FAQ
Can Chino deny my request to convert my garage into an ADU?
No, not categorically. State law (Gov. Code §65852.2 / SB 477 re-codification at §66310 et seq.) preempts local bans on garage-to-ADU conversions. Chino's March 17, 2020 ordinance under CMC Title 20 implements this state mandate.
Do I have to add a new driveway or parking space?
No. State law specifically exempts garage-to-ADU conversions from replacement parking requirements (Gov. Code §65852.2(a)(1)(D)(xi)).
How long does the City have to act on my application?
60 days from a complete application. ADU permits in California are ministerial — no discretionary hearing, no CEQA.
Rancho Cucamonga FAQ
Do I have to replace parking when I convert my garage?
No. State law prohibits cities from requiring replacement parking when converting a garage to an ADU.
Can I keep the garage door for appearance?
Generally you must remove or permanently close the garage door to create a weather-tight wall. Some faux doors are allowed if permanently sealed.
Can I rent my converted garage short-term?
No. ADUs including converted garages must be rented for 30+ days under state law.
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