Rialto has no STR-specific guest-occupancy cap in its municipal code. Title 18 Zoning does not define 'short-term rental,' so no STR overlay (such as Palm Springs' '2 per bedroom + 2' rule) applies. Residential occupancy is governed by general standards: California Building Code (Title 24 CCR Part 2) minimum room area for sleeping rooms, and HUD's 'Keating Memo' two-persons-per-bedroom-plus-one fair-housing guideline. Rialto MC §3.08 simply defines a 'transient' as any occupant for 30 consecutive days or less, without setting a maximum-guest threshold.
Because Rialto did not adopt an STR-specific ordinance, no per-bedroom or per-unit guest cap appears in Title 5 (Business Licenses), Title 8 (Health & Sanitation), or Title 18 (Zoning). The applicable limits are: (1) California Building Code Chapter 12 minimum 70 sq. ft. for the first occupant + 50 sq. ft. for each additional in a sleeping room, (2) Title 24 CCR Part 2 light/ventilation requirements for habitable rooms, and (3) HUD's 1998 Keating Memo two-per-bedroom-plus-one guidance applied for federal fair-housing compliance under 42 U.S.C. §3604. Hosts who exceed reasonable occupancy may also trigger Rialto MC Title 8 nuisance provisions (overcrowding, sanitation) and Chapter 9.50 noise enforcement if disturbances result.
Overcrowding complaints route to Community Compliance (909-820-2689) under general nuisance authority, not a dedicated STR cap. Repeated nuisance can support abatement; Title 24 occupancy is enforced by the Building & Safety Division (909-820-8851).
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Rialto, CA
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