Chino, CA Accessory Structures: ADU Rules (2026)
ADU rules in Chino, CA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Governing section
- § 20.11.020
- Detached ADU max size
- 1,200 sq ft
- Max height
- 1 story, up to 16 ft
- Interior/rear setback
- 4 feet
- State law
- Gov. Code §§ 66310-66342 controls
Summary
Chino's zoning code allows accessory dwelling units and junior ADUs on residential lots, capping size, height, and setbacks, though state ADU law can override any conflicting local limit.
A.This section is intended to implement the provisions of Sections 65852.2 and 65852.22 of the Government Code and, in case of ambiguity, shall be interpreted to be consistent with such provisions.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 38).
Full Breakdown
Chino Municipal Code § 20.11.020 implements Government Code §§ 65852.2 and 65852.22 -- the ADU statutes it cites, since recodified as Gov. Code §§ 66310-66342, which override any conflicting local limit. Locally, a detached ADU may reach 1,200 square feet, with a 4-foot interior side/rear setback and a maximum height of one story up to 16 feet; an attached ADU may reach 50% of the primary dwelling or 1,200 square feet, whichever is less. Junior ADUs cap at 500 square feet within the primary home. One parking space is required per ADU, waived near transit and in other listed cases. Adopted by Ord. 2020-006 (2020), amended by Ord. 2021-001 (2021) and Ord. 2022-010 (7-19-2022).
Violations & Fines
Enforced by Community Development through the building permit process; units exceeding the size, height, or setback standards, or built without permits, are subject to correction, permit denial, or code enforcement.
Frequently Asked Questions
How big can an ADU be in Chino?
Does Chino's ADU ordinance cite outdated state law?
Is a second parking space required for a Chino ADU?
Sources & Official References
Other rules in Chino
How Chino compares: Easiest Cities to Build an ADU·California rules heatmap·Compare Chino to another location·View the California accessory structures overview
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ADU Rules in Nearby Cities
How other cities in San Bernardino County handle adu rules.