Rancho Cucamonga, CA Home Business: Signage Rules (2026)

92 let residents run a business from their home only if it stays invisible from the street. 020, layered on top of any city, county, or state business license. 030 cap the use at 15 percent of the dwelling's square footage or one room, whichever is smaller, forbid outside employees other than resident family members (except cottage-food help), and require zero change in the building's outward appearance. Subsection (I) extends that no-visible-evidence rule to marketing: no signs may be displayed in conjunction with the home occupation and no advertising may use the home address.

That means no yard sign, no window placard, no vehicle wrap parked in the driveway, and no printed ad or online listing that publishes the residential street address. and receive up to five customers or clients and ten vehicle trips a day under subsection (E), but none of that traffic can be drawn in with a sign. The chapter also restricts accessory-structure use for the business to 600 square feet, limits deliveries to normal residential volume, and bars use of the property for ammunition recycling.

Because the sign prohibition sits inside the mandatory permit standards, failing to comply puts the underlying home occupation permit itself at risk, not just the sign.