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Santa Clara County, CA Home Business: Zoning & Home Occupation Permits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Nonresident employees
Max 1 (General tier)
Client visits
3/day, 10/week cap
Vehicles allowed
1 truck/van, ≤1 ton
Barred uses
Auto repair, medical, massage
Expanded tier
Needs 1-acre lot

Summary

Home-based businesses in unincorporated Santa Clara County must operate entirely inside the dwelling, employ no more than one nonresident worker, and keep client visits to three a day and ten a week under Zoning Ordinance § 4.10.180.

City-specific rules exist: Santa Clara, Mountain View, San Jose, and Sunnyvale have their own zoning & home occupation permits rules that differ from Santa Clara County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

A.Home Occupations: General. Uses classified as Home Occupations: General shall be subject to all of the following:1.The use shall be clearly incidental and subordinate to the residential use of the property and shall not change the character thereof;2.The use shall be conducted within the dwelling by resident occupants, and may include one (1) nonresident employee;3.The use shall not create additional...traffic in excess of the normal amount typical for the area. Client or customer visits to the site shall normally be limited to not more than three (3) per day, and 10 per week;

Source: Santa Clara County Zoning OrdinanceView official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 65).

Full Breakdown

Zoning Ordinance § 4.10.180 governs by-right 'Home Occupations: General' in the county's unincorporated residential zones. The business must be clearly incidental to the residential use, run entirely inside the dwelling by resident occupants (one nonresident employee allowed), and can't draw more than three client visits a day or ten a week. No more than one truck or van up to one ton, and only one non-illuminated, one-square-foot sign, are allowed. On-site auto repair, commercial food prep beyond a cottage food operation, medical or veterinary services, massage, vehicle painting and pest control are barred outright. A larger 'Expanded' tier, allowing accessory-building use and two employees, needs a one-acre lot and a special permit under the same section.

Violations & Fines

Running a home business beyond these limits, extra employees, more traffic than allowed, or a barred use like auto repair, can draw a zoning administrator interpretation, added conditions, or code enforcement action.

Frequently Asked Questions

Can I run a business from my home in unincorporated Santa Clara County?
Yes, as a by-right 'Home Occupation: General' under § 4.10.180, if it's run inside the dwelling, uses at most one nonresident employee, and keeps client visits to three a day and ten a week.
What businesses are banned as home occupations?
On-site auto repair, non-cottage commercial food prep, medical or veterinary services, massage, vehicle painting and pest control are all barred under § 4.10.180(A)(8).

Sources & Official References

Other rules in Santa Clara County

All Santa Clara County rules

How Santa Clara County compares: Easiest Cities to Run a Home Business·California rules heatmap·Compare Santa Clara County to another location·View the California home business overview

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