Rancho Cucamonga, CA Home Business: Zoning & Home Occupation Permits (2026)

Chapter 17.92 regulates commercial and office uses accessory to residential dwellings. Section 17.92.020 requires a home occupation permit be secured before establishing any home occupation, in addition to any other required permit or license, including a business license; permits are allowed even on legal nonconforming residential parcels sitting in an industrially zoned area. Section 17.92.030's development standards require the use stay clearly incidental and subordinate to residential use, occupying no more than 15 percent of the dwelling's total square footage or one room, whichever is less; remote employees working from home for an outside employer are not considered a home occupation at all.

Only family members residing on the premises may work in the business, with off-site employees or partners barred except for state-authorized cottage food operations (Section 17.92.030(B)). There can be no change to the building's outward appearance or other visible evidence of the activity (Section 17.92.030(C)), no signs, and no advertising using the home address (Section 17.92.030(I)). Accessory structures used for storage or workspace are capped at a cumulative 600 square feet in attached or detached structures or a garage, provided required on-site parking is still met (Section 17.92.030(G)).

No more than one commercial vehicle, or any commercial vehicle over 10,000 pounds gross vehicle weight, may be parked or stored per dwelling (Section 17.92.030(J)), and ammunition recycling is an outright prohibited home occupation use (Section 17.92.030(K)).