How Chino Handles Accessory Structures: A Practical Guide

Chino maintains 94 local ordinances across all categories, and 9 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where Chino falls on the strict-to-permissive spectrum compared to other cities.

ADU Permits

ADU permits in Chino are processed ministerially through the Planning Division and Development Services per CMC Chapter 20.11 and Cal. Gov. Code §65852.2(b). State law requires the city to act on a complete ADU application within 60 days without discretionary review or public hearings. Apply via the city's Accela Citizen Access portal at aca-prod.accela.com/CHINO.

Key details: Permit portal: aca-prod.accela.com/CHINO (Citizen Access). Review type: Ministerial - no public hearing. State deadline: 60 days from complete application. Required permits: Planning ADU + Building (Title 15) + utility. Planning contact: 909-334-3253 / planning@cityofchino.org.

Constructing an ADU without permits or occupying before final inspection violates CMC Title 15 (Buildings and Construction) and the California Building Code. Stop-work orders, daily penalties up to $1,000 (Gov. Code §36900), and required remediation apply.

Shed Rules

Chino regulates sheds and detached accessory buildings under Title 20 (Zoning). Small sheds 120 sq ft or less are exempt from building permits under the California Residential Code (CRC Section R105.2 / CBC Appendix M as adopted in Chino Municipal Code Title 15), but zoning setbacks, height limits, and lot-coverage rules in Title 20 still apply. Sheds may not be placed in a required front yard, and equestrian-zone parcels in the Chino Agricultural Preserve have separate barn/stable provisions.

Key details: Permit exemption: Sheds 120 sq ft or less, no plumbing/electric (CRC R105.2). Zoning setbacks: Title 20 — typically 5 ft side/rear in R-1 for under-14 ft accessory structures. Habitable use: Prohibited — must be permitted ADU/JADU to be lived in. Equestrian zones: Barns/stables separately regulated in A-R / Chino Ag Preserve zones. Code portal: Municode CMC Title 20 (Supp. 37, through Ord. 2025-002).

Sheds placed in required front yards, exceeding side/rear setbacks, or used as habitable space are zoning violations. Code enforcement can issue notices of violation under Chino Municipal Code Title 20 and Title 15. Unpermitted sheds with electrical or plumbing service can be tagged and required to be removed or permitted. Use of a shed as a dwelling unit is a separate violation enforced through building code and zoning.

Carport Rules

Carports in Chino are regulated as accessory structures under Chino Municipal Code Title 20 (Zoning) and require a building permit under Title 15 (which adopts the California Building Code and California Residential Code). Detached carports must meet residential-zone setbacks (typically 5 ft side / 5 ft rear in R-1) and height limits, and attached carports must meet the principal-dwelling setbacks. Replacing a garage with a carport does not eliminate required covered parking unless the conversion is to an ADU (then state law exempts replacement parking).

Key details: Permit required: Yes — building permit under CMC Title 15 (CBC/CRC). Detached setbacks: Typically 5 ft side / 5 ft rear in R-1 (verify in Title 20). Attached setbacks: Principal-dwelling setbacks of the zone. Height limit: Typically 14 ft for accessory structures in R-1. Replacement parking: Not required if carport demolished for an ADU (state preemption).

Building a carport without a permit, exceeding setbacks, or eliminating required covered parking are violations under CMC Title 15 and Title 20. Code enforcement can require a permit application and corrections to meet setbacks or removal. Carports used as habitable space, storage of hazardous materials, or commercial repair operations trigger additional zoning violations.

ADU Rules

Chino regulates Accessory Dwelling Units (ADUs) and Junior ADUs (JADUs) under Chino Municipal Code Chapter 20.11 (Accessory Structures), implementing California Gov. Code §65852.2 and §65852.22. One ADU and one JADU are allowed per single-family lot; JADUs must be entirely within the existing single-family residence footprint or attached garage and capped at 500 sq ft. State law preempts the city on ministerial approval, size minimums, and parking exemptions within 1/2 mile of transit.

Key details: Local code: CMC Chapter 20.11 (Accessory Structures). State law: Cal. Gov. Code §65852.2 (ADU) / §65852.22 (JADU). Units per lot: 1 ADU + 1 JADU on SFR lots. JADU max size: 500 sq ft (within existing footprint). Detached ADU max: 1,200 sq ft (state cap).

Building or occupying an ADU/JADU without permits is a CMC zoning violation enforceable as a misdemeanor or infraction under CMC Title 1 general penalty (up to $1,000/day per Gov. Code §36900). Unpermitted structures may be subject to abatement and required removal.

ADU Rental Restrictions

ADUs and JADUs in Chino may NOT be rented for terms shorter than 30 days. This is mandated by Cal. Gov. Code §65852.2(a)(6) statewide and reinforced by Chino's citywide short-term rental ban under Title 20 Zoning. STRs are not a permitted use in any Chino residential zone, with enforcement penalties reported at up to $1,000/day.

Key details: Minimum rental term: 30 days (Cal. Gov. Code §65852.2(a)(6)). STR ban: Citywide - STR not a permitted use in residential zones. Reported STR penalty: Up to $1,000/day. Long-term rent cap: AB 1482: 5% + CPI (max 10%/yr). JADU occupancy: Owner must occupy primary OR JADU.

Operating an ADU as a vacation rental violates state law and Chino zoning. The city's STR enforcement program has been documented to impose penalties up to $1,000/day. Civil and administrative penalties apply, plus potential abatement.

This is one of the stricter rules in Chino's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

ADU Impact Fees

Per Cal. Gov. Code §65852.2(f)(3), Chino CANNOT charge impact fees on ADUs under 750 sq ft. For ADUs 750 sq ft or larger, impact fees must be proportional - charged at a fraction equal to the ADU's square footage divided by the primary dwelling's square footage. Standard building-permit plan-check and inspection fees still apply.

Key details: Impact fee threshold: <750 sq ft = $0 impact fees (state mandate). 750+ sq ft fee formula: Proportional: (ADU sf / primary sf) × fee. JADU impact fees: Exempt (under 500 sq ft). Still payable: Building plan check, inspection, utility hookups. State statute: Cal. Gov. Code §65852.2(f)(3).

If Chino charges impact fees in excess of the state cap, applicants may protest under the Mitigation Fee Act (Gov. Code §66020) and seek refund within 90 days of payment.

If you are coming from a city with tighter rules, you will find Chino gives residents more flexibility on adu impact fees.

ADU Owner Occupancy

For ADUs permitted from Jan 1, 2020 through Dec 31, 2024, Cal. Gov. Code §65852.2(a)(6) prohibited cities including Chino from imposing owner-occupancy requirements. As of Jan 1, 2025, cities may again require owner occupancy on new ADU permits but Chino's CMC Chapter 20.11 follows state defaults. JADUs ALWAYS require owner occupancy of either the primary residence or the JADU under Cal. Gov. Code §65852.22(a)(2).

Key details: ADU owner-occupancy (2020-2024): Prohibited - permanently exempt. ADU owner-occupancy (2025+): Allowed if locally adopted. JADU owner-occupancy: Always required (Gov. Code §65852.22(a)(2)). JADU recordation: Deed restriction required at permit. Exceptions: Government, land trust, nonprofit owners.

Falsely declaring owner occupancy at JADU permit issuance, or vacating both units after JADU permit, may trigger code enforcement, revocation of the JADU certificate of occupancy, and required deed-restriction enforcement.

Garage Conversions

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.

Key details: 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. Owner occupancy: Not required for ADUs permitted 1/1/2020 – 1/1/2025.

Operating an unpermitted garage-conversion living unit is a zoning and building code violation. Code enforcement can require either permit cure (file plans, pay fees, meet CRC habitability/egress) or removal of habitable improvements. Renting an unpermitted garage as a dwelling can additionally trigger Health & Safety Code substandard-housing actions.

Chino is more permissive than most cities when it comes to garage conversions. That said, there are still limits.

Tiny Homes

Chino allows tiny homes only through three regulated pathways: (1) a permitted Accessory Dwelling Unit (ADU) up to 1,200 sq ft on a permanent foundation under Gov. Code §65852.2 (now §66310 et seq.) and Chino's 3-17-20 ADU ordinance; (2) a Junior ADU (JADU) up to 500 sq ft within an existing single-family dwelling under Gov. Code §65852.22 (now §66333 et seq.); or (3) a Movable Tiny House registered as a recreational vehicle / park trailer under Cal. Health & Safety Code §18010 and ANSI A119.5 — but only as a temporary RV, not a permanent residence on a single-family lot.

Key details: ADU max size: 1,200 sq ft detached (Gov. Code §65852.2). ADU setbacks: 4 ft side/rear minimum (state preemption). JADU max size: 500 sq ft within existing SFD (Gov. Code §65852.22). Owner occupancy: JADU yes; ADU no (for permits 1/1/2020–1/1/2025). Tiny house on wheels: Treated as RV under HSC §18010 — not a permanent residence.

Living in an RV-classified tiny home on a Chino single-family lot violates Title 20 zoning. Building or occupying an unpermitted tiny home on a foundation violates CMC Title 15 (building) and Title 20 (zoning). Code enforcement can require either a full ADU permit (with CRC habitability and energy compliance), conversion to legal storage use, or removal. Renting an unpermitted tiny home triggers Health & Safety Code substandard-housing actions.

The Bottom Line

Compared to many U.S. cities, Chino gives residents more room on accessory structures. 2 of the 9 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects Chino's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.