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Glenn County, CA Accessory Structures: ADU Rental Restrictions (2026)

Significant Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Zones affected
AP Agricultural Preserve; FS Farmland Security
Eligible occupants
Owner's relatives or on-site employees only
Enabling chapter
Ch. 15.175, Second Dwellings
Construction standard
Must meet Chapter 15.59 standards
Approval path
Application to planning authority, Director approval
Repeat-violation penalty
Up to $5,000 fine or 1 year jail

Summary

In unincorporated Glenn County, a second dwelling (ADU) permitted in the Agricultural Preserve zone under Glenn County Code Chapter 15.175 cannot be rented to the open market. Zoning Code Section 15.46.020 limits who may live in the unit to relatives of the property owner or to employees who work on the property, closing off ordinary tenant rentals.

These county ordinances apply to unincorporated areas of Glenn County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

The following uses and structures shall be permitted in the AP zone: One single-family dwelling for each parcel of land; Second dwelling per each parcel of land subject to Chapter 15.175 providing that such dwelling may only be occupied by relatives of the owner or by employees who work on the property;

Full Breakdown

59, Minimum Residential Construction Standards. But approval to build is not approval to rent freely. 020, so a landowner in either zone who wants a second unit cannot lease it on the open rental market, to vacation renters, or to unrelated tenants; occupancy is legally confined to family members of the parcel owner or to people employed on that same parcel. Because this condition is written into the permitted-use listing itself rather than as a separate standard, it functions as a running condition of the use: renting the unit outside the relative/employee class converts the permitted second dwelling into an unpermitted use of the property.

010 ties the AP zone to preserving agricultural land use and protecting the agricultural community from unrelated encroachment, which is the policy basis codified for restricting the second unit's tenancy.

Violations & Fines

Renting a Chapter 15.175 second dwelling to someone who is not a relative of the owner or an on-site employee is a zoning violation of the AP or FS district's permitted-use conditions. Under Glenn County Code Section 1.12.010, a violation of a regulatory or prohibitory code provision is an infraction unless a violation of the same provision recurs three or more times within any 12-month period, at which point the third and later violations become misdemeanors punishable by up to one year in county jail and/or a fine of up to $5,000, plus an equivalent civil penalty track.

Frequently Asked Questions

Can I rent my Glenn County second dwelling on the open market?
Not if it sits in the AP or FS zone. Glenn County Code Section 15.46.020 (and the matching Section 15.47.020 in the Farmland Security zone) permits the second dwelling only if it is occupied by relatives of the property owner or by employees who work on the property, so ordinary tenant or vacation rentals are outside the permitted use.
Does the county still require a permit for the second dwelling itself?
Yes. Chapter 15.175 requires an application to the planning authority, and the Planning Director must find the unit meets the Chapter 15.59 minimum residential construction standards before approving it, separate from the occupancy restriction in the zone's use list.
What happens if I rent to someone outside the relative/employee class?
It becomes a zoning violation of the permitted-use condition. Under Section 1.12.010, a first violation is an infraction; a third or later violation of the same provision within 12 months becomes a misdemeanor carrying up to a $5,000 fine, up to a year in jail, or both.
Does this rule apply county-wide or only in certain zones?
It is written into the permitted-use lists of specific agricultural zones, confirmed in the AP zone (Section 15.46.020) and the FS zone (Section 15.47.020). Other zoning districts list a second dwelling as permitted subject to Chapter 15.175 without repeating that occupancy language in the sections reviewed.

Sources & Official References

Other rules in Glenn County

All Glenn County rules

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