Yolo County, CA Building Safety: Fire Sprinkler Requirements (2026)
Key Facts
- Applies to
- New manufactured/mobile homes, HSC §§18007, 18009
- Multifamily coverage
- Two-unit homes under HSC §18008.7
- Design standard
- Title 25 CCR; licensed designer; HCD approval
- Exception
- Homes previously permitted in Yolo County
- Permit issuer
- Department of Community Services
- Penalty
- Misdemeanor, Title 1 Ch. 2 (up to $500/6 mo.)
Summary
Every new manufactured home or mobile home installed in unincorporated Yolo County must have a licensed-designed fire sprinkler system under Sec. 7-2.04(d), with an exception carved out for units already permitted and installed in the county before the requirement took effect. The Department of Community Services enforces the rule as a condition of the installation permit.
(d) Fire sprinklers are required for all new manufactured housing or mobile homes as defined by California Health and Safety Code sections 18007 and 18009 and multifamily manufactured homes with two dwelling units defined by California Health and Safety Code section 18008.7, installed within Yolo County. Fire sprinklers shall be designed by a licensed professional and installed in accordance with Title 25 of the California Code of Regulations and subject to California Department of Housing and Community Development approval. Exception: Manufactured housing or mobile homes for residential occupancies previously installed under a permit issued in Yolo County.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-21: Supplement 2026 S-21 includes: Local legislation current through Ord. 1584, effective June 25, 2026).
Full Breakdown
Sec. 02 designates the Department of Community Services as the enforcement authority for manufactured housing and mobile home installation under California Health and Safety Code Sections 18300, 18613 and 18614, and Sec. 03 bars anyone from locating, installing or connecting utilities to a manufactured home or mobile home outside a mobile home park without first obtaining a permit and paying the fees on the county's current fee schedule. Sec. 04 lists the findings the Department must make before issuing that permit, including HCD approval of plans, foundation-system compliance, and licensed design of any foundation engineering.
7, with the system designed by a licensed professional, installed per Title 25 of the California Code of Regulations, and subject to HCD approval. The only exception covers manufactured housing or mobile homes previously installed under a Yolo County permit. Sec. 04(f) also requires the Director's approval of the site plan under the county's Mobile Home Park Conversion Ordinance where applicable, and Sec. 05 allows a re-inspection fee when scheduled work isn't ready. Sec. 06 requires the Department to record the HCD certificate of occupancy with the County Recorder once a home on a foundation passes final inspection.
Violations & Fines
Sec. 7-2.07 makes any violation of the manufactured-housing chapter, including installing a home without the required sprinkler system, a misdemeanor punishable as set forth in Title 1, Chapter 2 of the Yolo County Code. That general penalty provision, Sec. 1-2.01, caps the fine at $500 and the jail term at six months, or both, and treats each day the violation continues as a separate offense; the Department can also refuse to issue the certificate of occupancy until the sprinkler finding is satisfied.
Frequently Asked Questions
Does Yolo County require fire sprinklers in new mobile homes?
Do older mobile homes have to be retrofitted with sprinklers?
Who has to design and approve the sprinkler system?
What agency issues the manufactured home installation permit?
Sources & Official References
Other rules in Yolo County
California rules heatmap·Compare Yolo County to another location·View the California building safety overview
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