San Bernardino County Development Code Chapter 83.13 prohibits exterior commercial signs identifying a home occupation in residential zones. The dwelling must continue to appear as a single-family residence.
Under Development Code Chapters 84.07 (home occupations) and 83.13 (sign standards), properties used for home occupations in unincorporated San Bernardino County may not display any exterior sign, window display, or other visible evidence of the business. The fundamental purpose of the home occupation permit framework is to allow low-impact business activity without altering the residential character of the neighborhood, and visible signage directly contradicts that purpose. One small non-illuminated address plate or identification plaque is generally allowed, but anything that advertises goods or services, lists business hours, or uses commercial logos is prohibited. Vehicles parked at the home may not display large commercial lettering beyond what is standard for a personal business vehicle. In resort communities like Big Bear Lake and Lake Arrowhead, scenic corridor overlays impose even stricter sign controls. Temporary contractor or garage sale signs are handled separately under the sign chapter and have their own limits on size, duration, and location.
Unpermitted or prohibited signage in a residential zone is a code enforcement violation. Code Enforcement typically issues a correction notice first, followed by administrative citations of 100 to 500 dollars per day if the sign is not removed.
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