Ontario, CA Short-Term Rentals: Occupancy Limits (2026)
Key Facts
- Max Occupancy
- 2 x number of bedrooms (incl. host)
- Concurrent Groups
- 2 groups / 2 booking transactions
- Un-Hosted Stay Cap
- 90 days per calendar year
- Hosted Stays
- Not limited
- Events
- Prohibited (weddings, conferences, etc.)
- Code Section
- Development Code 5.03.363(I)(5),(8),(11)
Summary
Total occupancy at an Ontario STR, including the host and all guests, may not exceed two times the number of bedrooms. A single dwelling is limited to two concurrent groups or booking transactions, and un-hosted stays are capped at 90 days per year.
The dwelling unit's occupancy, including the host, other residents of the dwelling unit, and guests, during a short-term rental shall not exceed two times the number of bedrooms of the dwelling unit. ... A single dwelling unit shall be limited to two groups of any number concurrently or two concurrent booking transactions. ... Un-hosted stays shall be limited to a total of 90 days within a calendar year at the same dwelling unit. Hosted stays shall not be limited.
Full Breakdown
Under Development Code Section 5.03.363(I), the dwelling unit's occupancy during a short-term rental, including the host, other residents, and guests, shall not exceed two times the number of bedrooms in the dwelling unit. A single dwelling unit is limited to two groups of any number concurrently, or two concurrent booking transactions. All advertising must display the current valid permit number, a street-view photo of the front of the house, and the maximum number of guests based on this occupancy limit. The number of bedrooms is documented at application via a County Assessor record. Un-hosted stays (where the host is off-site) are limited to a total of 90 days within a calendar year at the same dwelling; hosted stays are not limited. No events, including conferences, weddings, fundraisers, or any commercial events, may be held at a short-term rental.
Violations & Fines
Exceeding the occupancy or two-group limits is a violation of the chapter, drawing administrative civil penalties of $1,000/$2,000/$3,000 per Section 5.03.363.K, with two violations in one year triggering immediate permit suspension under subsection (F).
Frequently Asked Questions
How many guests can stay at my Ontario short-term rental?
Can I book two separate parties at the same house?
Is there a cap on how many nights I can rent?
Sources & Official References
Other rules in Ontario
California rules heatmap·Compare Ontario to another location·View the California short-term rentals overview
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Occupancy Limits in Nearby Cities
How other cities in San Bernardino County handle occupancy limits.