Commercial Real Estate in Santa Clara County: City Codes, County Districts and Urban Service Areas
By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.
Nearly all commercial and industrial property in Santa Clara County is inside its 15 cities, from San Jose and Sunnyvale to Gilroy and Morgan Hill. That is by design: countywide policy steers urban development into cities, so the County’s own commercial districts mostly cover small unincorporated pockets surrounded by a city and a handful of rural crossroads such as San Martin and Coyote. Confirm which agency controls a parcel first, and expect the answer for a pocket to point back to the surrounding city’s general plan.
Who controls the parcel
Santa Clara LAFCO lists the 15 cities: Campbell, Cupertino, Gilroy, Los Altos, Los Altos Hills, Los Gatos, Milpitas, Monte Sereno, Morgan Hill, Mountain View, Palo Alto, San Jose, Santa Clara, Saratoga and Sunnyvale. Each city sets an urban service area that LAFCO must approve before it grows. Under the County’s Urban Development Policies, urban development should occur only on land annexed to a city, and the policies encourage cities to annex the unincorporated islands inside their service areas. In practice, a buyer of a County pocket parcel should ask whether the surrounding city would require annexation for a new use or a sewer connection.
| Area | Who regulates commercial use | Our guide |
|---|---|---|
| San Jose | City of San Jose | San Jose |
| Santa Clara, Sunnyvale, Mountain View, Milpitas | Each city | Santa Clara, Sunnyvale, Mountain View, Milpitas |
| Palo Alto, Los Altos, Cupertino, Campbell | Each city | Palo Alto, Los Altos, Cupertino, Campbell |
| Los Gatos, Saratoga, Monte Sereno, Los Altos Hills | Each town or city | Los Gatos, Saratoga |
| Morgan Hill, Gilroy | Each city | Morgan Hill, Gilroy |
| Unincorporated pockets inside urban service areas | County zoning, consistent with the city’s general plan | This page |
| Rural unincorporated (San Martin, Coyote, New Almaden, Mount Hamilton, Holy City, Redwood Estates) | County rural districts | San Martin, Coyote, New Almaden |
| Stanford lands | County, under Stanford-specific districts | Stanford |
Santa Clara County zoning for commercial and industrial use
Chapter 2.40 of the County Zoning Ordinance says its purpose is to allow fitting uses on mostly nonresidential unincorporated land inside urban service areas, consistent with the applicable city’s general plan.
| District | Intended uses | Notes |
|---|---|---|
| CN Neighborhood Commercial | Basic shopping and services for nearby residents | Applied where the city plan shows similar commercial use |
| CG General Commercial | Retail, service and administrative uses for a large trade area | Same city-plan link |
| OA Administrative/Professional Office | Offices designed to fit adjacent uses | Same city-plan link |
| ML Light Industrial | Heavy commercial and light industry such as storage, manufacturing and servicing | Near commercial areas, arterials and rail; no new residences |
| MH Heavy Industrial | Essential heavy industry | Sited to limit effects on neighbors; no new residences |
| RS Roadside Services (Ch. 2.50) | Clustered highway-serving uses | Special purpose district with 30-ft yards |
| RR Rural Residential (Ch. 2.20) | Rural housing with rural-scale nonresidential uses | |
| A, AR, HS (Ch. 2.20) | Exclusive agriculture, ranchlands and hillside | Agriculture and limited resource uses |
In CN, CG and OA, housing, including commercial and residential mixed use, needs a use permit and architecture and site approval, while ADUs are permitted by right. In ML and MH, new homes are barred and even expanding a legal nonconforming residence takes a use permit.
Rural crossroads, hillsides and Stanford
Rural districts. The County’s zoning summary describes Exclusive Agriculture as protecting long-term farming, Agricultural Ranchlands as preserving ranching and natural resources, and Hillside as keeping mountain land largely in open space with grazing and very low-density housing. Commercial activity in San Martin, Coyote or on the Mount Hamilton road therefore tends to fall under Rural Residential at rural scale, Roadside Services, or legal nonconforming status. Verify which before buying a rural store or service property.
Combining districts. A scenic road designation (-sr) requires design review within 100 feet of a designated scenic road, the -d designation triggers design review such as the Santa Clara Valley Viewshed, and -h historic preservation can override base uses. Rural highway frontage often carries one of these.
Stanford. Stanford lands use their own campus districts and are exempt by protocol from the city general plan conformance that applies to other pockets.
Annexation, utilities and use limits
The central County-specific risk is annexation. Because cities are expected to absorb their islands, a pocket parcel may be annexed during your hold, at which point the city’s zoning, business tax and fees apply. Many pockets also lack sewer, and connection can depend on the city. Ask LAFCO and the surrounding city about pending island annexations before you close.
Transfer tax, business tax and property tax
The County Recorder collects documentary transfer tax at recording. The County Ordinance Code Div. A30, Ch. III sets it at $0.55 per $500 of value, excluding liens that remain on the property, and §A30-40 credits a conforming city tax set at half that rate. Several cities in the county levy their own transfer taxes, some on top of the County tax, so confirm the total on the escrow estimate. A change of ownership generally triggers Proposition 13 reassessment. We did not verify an unincorporated business license tax or the County’s transient occupancy tax rate.
Due diligence that matters in Santa Clara County
- Confirm city or County, and for a County pocket, which city’s urban service area and general plan apply.
- Ask about pending island annexations and sewer availability.
- Read combining district suffixes such as -sr, -d and -h.
- For industrial pockets, note that ML and MH bar new residences.
- For rural parcels, confirm whether the business is permitted, conditionally permitted or nonconforming.
- Work through our commercial due diligence checklist.
Questions people ask
Why is there so little County-zoned commercial land?
Countywide Urban Development Policies direct urban development to land annexed to cities, so most commercial property is in the 15 cities.
How does the County zone a commercial pocket inside a city?
With CN, CG, OA, ML or MH, applied consistent with the surrounding city’s general plan.
Can I add apartments to a County commercial property?
In CN, CG and OA, with a use permit and architecture and site approval. Not in ML or MH.
Will my unincorporated parcel be annexed?
Possibly. The policies encourage cities to annex their islands; check with LAFCO and the city.
What zoning applies to a store in San Martin?
Usually a rural or special-purpose district such as Rural Residential or Roadside Services. Confirm on the County zoning map.
Who regulates Stanford land?
The County, using Stanford-specific campus districts.
Does Diamond handle commercial property in Santa Clara County?
Contact Matthew Martinez to discuss buying, selling or leasing commercial property in Santa Clara County.
Sources & notes
- Santa Clara LAFCO brochure
- County Zoning Ordinance, Chapter 2.40 commercial and industrial districts
- County zoning summary, rural and combining districts
- Santa Clara County Ordinance Code, Division A30, Chapter III, Real Property Transfer Tax
City rules are covered on each linked city page. This page is general information, not legal or tax advice. Last reviewed October 2026 by Matthew Martinez.
Related: Santa Clara County real estate guide · Multifamily property in Santa Clara County · Commercial real estate services
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