Building Safety in Yolo County, CA (2026)
7 county-level rules, plus city-specific rules for 1 city in Yolo County, California.
Verified from official government sources
Fire Sprinkler Requirements
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.
Fire Sprinklers Required in New Mobile Homes
Some RestrictionsYolo County Code of Ordinances § 7-2.04(d)
(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 ...
Childcare Center Rules
A stand-alone child care center for more than fourteen children isn't a by-right use anywhere in unincorporated Yolo County. Sec. 8-2.506(h) requires a Site Plan Review in the RR-5, RR-2, R-M, and R-H zones and specified commercial zones, and the Planning Director can escalate a small center to a Minor Use Permit or a large one to a Major Use Permit.
Yolo County Child Care Center Permit Rules
Some RestrictionsYolo County Code of Ordinances § 8-2.506(h)
Child care centers are non-residential facilities that typically provide care for more than fourteen (14) children. They include infant centers, child care centers, daycare centers, preschools, nursery schools, and after-school programs. Child care centers are allowed with the issuance of a Site Plan Review in the RR-5, RR-2, R-M and R-H zones, and in specified commercial zones, provided that t...
Green Building Code
Unincorporated Yolo County construction is governed by the 2019 California Green Building Code, adopted word-for-word under Sec. 7-1.13 with zero local amendments. Every new-construction building permit must meet CALGreen's mandatory water, energy and waste-diversion measures, enforced by the Chief Building Official alongside the county's other Title 7 construction codes.
Yolo County Adopts 2019 CALGreen Code
Some RestrictionsYolo County Code of Ordinances §§ 7-1.02(j), 7-1.13
(j) The 2019 California Green Building Code, including Appendix Chapters A4-Residential Voluntary Measures and A5-Nonresidential Voluntary Measures, as published in Title 24, Part 11 of the California Code of Regulations and amended in Section 7-1.13. ... Sec. 7-1.13. Amendments to the California Green Building Code. The 2019 California Green Building Code (CGBC) is adopted as published by ...
Building Permits
Yolo County adopted the 2019 California Building Code as its Title 7, Chapter 1 permit system for the unincorporated area. A permit is required for construction work unless it falls under one of the county's narrow amended exemptions: small residential decks and specific agricultural buildings approved in advance by the Chief Building Official.
When You Need a Building Permit in Yolo County
Some RestrictionsYolo County Code of Ordinances § 7-1.04(a)(3)
(3) Section 105.2-Work exempt from permit is amended to include subsections 105.2(14)- and 105.2(15)-Permit Exempt Agricultural Buildings. Section 105.2(14). Residential Decks, Decks for Group R-3 occupancies and Group U occupancies accessory to R-3 occupancies, not exceeding 200 square feet (18.58 m2) in area, that are not more than 30 inches (762 mm) above grade at any point, are not attach...
Electrical Permits
Yolo County requires an electrical permit for wiring work in the unincorporated area by adopting the 2019 California Electrical Code under Sec. 7-1.02(c), administered through the same permit, fee, and appeal process the county built into its building code in Sec. 7-1.03 and 7-1.04.
Yolo County Adopts the 2019 Electrical Code
Some RestrictionsYolo County Code of Ordinances § 7-1.02(c)
The 2019 California Electrical Code including Annex Chapters: A- Product Safety Standards, B-Application Information for Ampacity Calculation, C-Conduit and Tubing Fill Tables for Conductors and Fixture Wires of the Same Size, D-Examples, F-Availability and Reliability for Critical Operations Power Systems; and Development and Implementation of Functional Performance Tests (FPTs) for Critical O...
Plumbing Permits
Yolo County requires a plumbing permit for work in the unincorporated area under the 2019 California Plumbing Code, adopted in Sec. 7-1.02(e) and amended in Sec. 7-1.08 to replace the code's own fee table with the county's fee schedule.
Yolo County Adopts the 2019 Plumbing Code
Some RestrictionsYolo County Code of Ordinances § 7-1.02(e)
The 2019 California Plumbing Code including Appendix Chapters: A- Recommended Rules for Sizing the Water Supply System, C-Alternate Plumbing Systems, D-Sizing Storm Water Drainage Systems, H- Private Sewage Disposal Systems, and I-Installation Standard for PEX Tubing Systems for Hot- and Cold-Water Distribution, as published in Title 24, Part 5 of the California Code of Regulations and amended ...
Building Inspections
Yolo County charges a re-inspection fee any time a building inspector shows up and the work isn't ready or corrections from a prior visit are still outstanding. The Chief Building Official won't send an inspector back out until that fee is paid, so scheduling inspections before the job is actually ready costs real money.
Building Re-Inspection Fees in Yolo County
Some RestrictionsYolo County Code of Ordinances § 7-1.04 (Building Code amendments, Section 109.7 Re-inspections)
Section 109.7 Re-inspections. A re-inspection fee may be assessed for each inspection or re-inspection when such portion of work for which inspection is scheduled and is not complete or when corrections called for previously are not complete. This section is not to be interpreted as requiring re-inspection fees the first time a job is rejected for failure to comply with the requirements of this...
Building Safety by City in Yolo County
1 cities in Yolo County have their own building safety rules. Each link goes to that city's dedicated page with code citations.
All Yolo County ordinances
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