Chico's Accessory Structures: The Rules That Matter
Every city handles accessory structures a little differently. In Chico, California, there are 6 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.
Shed & Carport Rules
Storage sheds and similar detached accessory structures on Chico single-family lots need 3-foot side, 10-foot street-side, and 5-foot rear setbacks, and can't sit in a front setback or within 10 feet of the street property line.
Key details: Side setback: 3 feet minimum. Rear setback: 5 feet (0 ft. near alley). Height cap: 15 ft.; 25 ft. with use permit. Size cap: 25% of main structure's floor area.
Building a shed that violates a required setback, height, or size limit is a zoning violation, subject to code enforcement correction, an administrative citation, or removal under Chapter 19.76's accessory-structure standards.
ADU Rules
Chico lets ADU applicants get a zoning clearance or apply directly for a building permit, with a 4-foot side/rear setback for new detached units and a 1,200-sq-ft cap.
Key details: Detached ADU setback: 4 ft side/rear. Max ADU size: 1,200 sq ft. Approval path: Zoning clearance or building permit. Minimum rental term: 30 consecutive days.
Renting an ADU or JADU for stays under 30 consecutive days violates § 19.76.130; building without the required zoning clearance or permit is enforced as a building code violation with a stop-work order.
ADU Rental Restrictions
Chico bans short-term rentals of accessory dwelling units, requiring ADUs and JADUs to be leased for 30 or more consecutive days under the city's zoning code.
Key details: Minimum rental term: 30 consecutive days. Applies to: ADUs and JADUs. Short-term/vacation rental: Prohibited. Section: CMC § 19.76.130(B)(1).
Renting an ADU or JADU for under 30 days can draw code enforcement citations, fines, and potential revocation of the unit's occupancy approval.
Compared to other cities, Chico takes a harder line on adu rental restrictions. The enforcement and penalty structure reflects that.
ADU Owner Occupancy
Chico's code requires junior accessory dwelling units to be owner-occupied, but standard ADUs carry no such requirement under the city's current zoning code, consistent with state law.
Key details: JADU owner-occupancy: Required. Standard ADU owner-occupancy: Not required. Max JADU size: 500 sq ft. Governing section: CMC § 19.76.130(A)(2).
Occupying or renting a JADU in violation of the owner-occupancy requirement can trigger permit denial or code enforcement action by the City of Chico Building Division.
Garage Conversions
Converting a Chico single-family garage or carport to living space means replacing the lost parking spaces, unless the conversion creates an accessory dwelling unit, per Chico Municipal Code Section 19.70.040.
Key details: General rule: Replace lost garage parking. ADU exception: No replacement required. Applies to: Single-family garage/carport conversions. Governing section: Chico Municipal Code §19.70.040(A).
Converting a garage without replacing the required parking is a zoning code violation caught at building-permit review; the city can withhold permit approval or require the replacement spaces be added to the site plan before work proceeds.
ADU Impact Fees
Chico cuts development impact fees in half for an ADU that shares its sewer lateral with the main house, under Chico Municipal Code § 3.85.135.
Key details: ADU fee reduction: 50% of base impact fees. Condition: shares primary residence's sewer lateral. Fee types covered: transportation, drainage, park, building. Set by: city council resolution, Chapter 3.85.
Not a violation-based provision: it sets the impact fee rate applied at building permit issuance; the fee amount is set by city council resolution under Chico Municipal Code Chapter 3.85.
The Bottom Line
Chico's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Chico is broadly strict or permissive.
Keep in mind that Chico can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.