Ordinances You Need to Know in Ontario, CA
Local rules that could affect everyday life, property use or a decision to move to Ontario, CA.
Local jurisdiction: City of Ontario, California.
Home Occupation Standards
Ontario requires a home occupation to remain incidental and subordinate to the primary residential use. Only occupants of the dwelling may engage in the home occupation.
Source: City of Ontario Development Code
Code section: Ontario Development Code Division 5.03 - Home Occupations
Development Code revision: December 3, 2024
NTL verified: August 31, 2026
Customer and Student Limits
Ontario permits no more than one client or customer to visit a home occupation at one time. In-home educational activities such as music lessons, tutoring or religious instruction may have up to three students present at one time.
Source: City of Ontario Development Code
Code section: Ontario Development Code Division 5.03 - Home Occupations
Development Code revision: December 3, 2024
NTL verified: August 31, 2026
Home Business Floor Area
Ontario requires the home occupation to be conducted inside an enclosed structure, confined to one room of the dwelling, and limited to no more than 10% of the dwelling's gross floor area.
Source: City of Ontario Development Code
Code section: Ontario Development Code Division 5.03 - Home Occupations
Development Code revision: December 3, 2024
NTL verified: August 31, 2026
Disclaimer & Due Diligence
NarrowTheList includes only location-specific rules we could tie to the local jurisdiction and source shown with each item. State rules are not included on this page.
Ordinances can be amended, repealed, renumbered or interpreted differently depending on the property, zoning district, permit status or activity involved. These summaries are provided as a starting point for relocation research and may not reflect every exception, permit requirement or later amendment.
Before relying on an ordinance for a home purchase, rental, home business, vehicle, pet, property improvement or other important decision, review the linked source and do your own due diligence. Contact the applicable city clerk, municipal office, town or village hall, county office or other local government department to verify the current ordinance and how it applies to the specific property or activity you are considering.