ADU Regulations in Chico, California (2026)
Summary from local ordinance data. Verify with city planning for your specific lot.
Regulations at a glance
| Rule | Value |
|---|---|
| Max ADU Size | 1200 sq ft |
| Side Setback | 4 ft |
| Rear Setback | 4 ft |
| Max Height | 16 ft |
| Approval Type | Ministerial (by-right) per Gov Code §65852.2 |
| Parking Requirements | Often waived per state law; check local ordinance |
Local rules & notes
Pre-Approved ADU Plans: The City offers a catalog of pre-approved prototype plans to help homeowners start their projects. Manufactured Housing Permitted: Mobile homes or manufactured housing units are allowed as ADUs if secured to an approved permanent perimeter foundation. Guest House vs ADU Distinction: The city explicitly defines Guest Houses as temporary (30 days or less) without kitchens, distinct from ADUs which are for long-term housing.
For the official ordinance and latest updates, check your city or county planning department.
Frequently asked questions about ADU regulations in Chico
What is the maximum ADU size in Chico, California?
In Chico, the maximum ADU size is typically 1200 square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; Chico may follow state defaults or have local limits. Verify with Chico planning for your specific lot.
What are the setback requirements for ADUs in Chico?
In Chico, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Chico planning for overlay zones or design standards that could affect your site.
What is the maximum height for an ADU in Chico?
In Chico, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with Chico or county planning for your zone.
Is ADU approval ministerial in Chico?
In Chico, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; Chico planning can confirm the exact process.
Are there parking requirements for ADUs in Chico?
In Chico, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Chico planning for your address.
Check if your specific address qualifies
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