Butte County, CA Accessory Structures: ADU Rental Restrictions (2026)
Key Facts
- Governing section
- Zoning Ordinance § 24-172(G)(7)
- Rental term rule
- Same term as primary dwelling
- Related permit scheme
- Short-term rental ordinance, § 24-172.1
- ADU size cap
- None under § 24-172(G)(1)
Summary
An accessory dwelling unit or junior ADU in unincorporated Butte County must be rented under the same rental term as the primary dwelling, closing off short-term or transient rental of the accessory unit under Section 24-172(G)(7).
7.Rental Term. The rental term for an accessory dwelling unit or a junior accessory dwelling unit is the same as for the primary dwelling.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 61).
Full Breakdown
7 is the rental term rule: the rental term for an accessory dwelling unit or a junior accessory dwelling unit is the same as for the primary dwelling. 1, the county's separate short-term rental ordinance enacted under Ordinance 4159, defines short-term rentals as stays typically of 30 days or less and is a distinct permitting scheme from Section 24-172, the rental-term rule effectively ties an ADU's occupancy pattern to whatever the primary residence is doing rather than letting the accessory unit be marketed independently as a standalone vacation rental.
3 drop to four feet from side and rear lot lines for a detached new-build ADU, with wider setbacks required in the State Responsibility Area for defensible space and in the Agricultural Buffer Area. 4 caps at one space per bedroom or per unit, whichever is less, and is waived entirely in several circumstances including proximity to transit or a car-share vehicle. 5(b) unless the primary residence itself requires them under Government Code Section 66314.
Violations & Fines
Renting an ADU or JADU on terms shorter than what applies to the primary dwelling runs contrary to Section 24-172(G)(7) and, where the arrangement amounts to a short-term rental, would instead require separate compliance with the county's short-term rental administrative permit under Section 24-172.1, including its own permit application, fee, and occupancy standards; operating without that separate authorization is enforceable as a zoning violation.
Frequently Asked Questions
Can I rent my Butte County ADU as a short-term vacation rental?
Is there a minimum lease length required for an ADU?
Does the ADU rental-term rule apply to junior ADUs too?
Sources & Official References
Other rules in Butte County
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