Commercial Real Estate in San Ardo: County Zoning, Oil Field Rules and Water District Limits

By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.

San Ardo is a small unincorporated town in southern Monterey County, about a mile east of Highway 101 and roughly 20 miles south of King City, surrounded by farmland, range land and the oil field that shares its name. Commercial property here is a handful of town-center lots, service and yard sites, agricultural processing and oil field support uses, and the farms themselves. Every rule comes from Monterey County and from the tiny local water district, so confirm zoning and service capacity for each parcel before relying on this page.

Who controls the parcel

San Ardo has no city government. Monterey County’s Title 21 inland zoning code and the General Plan’s South County Area Plan, adopted October 26, 2010 and amended as of March 7, 2025, govern land use. The County’s Housing and Community Development department issues permits.

The town’s water and sewer come from the San Ardo California Water District. According to the Monterey County LAFCO 2015 service review, adopted December 7, 2015:

Formation. The district was formed in 1955.
Size. It covers only about 80 acres.
Water. It relies solely on groundwater from two wells, one active and one reserve, plus a 55,000-gallon storage tank.
Sewer. It collects sewage and disposes of it in two saturation-evaporation ponds.
Sphere of influence. Its sphere matches its boundary, as set in 1983, and LAFCO recommended no change.

Parcels outside that small boundary rely on private wells and septic systems.

San Ardo zoning for commercial, industrial and agricultural business

Check each parcel’s zoning string on the County map. The districts most likely to apply in and around town are:

District	Intended uses	Notes
LC Light Commercial (21.18)	Light commercial uses serving nearby homes	Offices and many shops by administrative permit. Restaurants, motels and gas stations by use permit. 35 ft. 50% coverage
HC Heavy Commercial (21.20)	Warehousing, storage, repair, trade shops and fabrication	Trucking, contractor yards, ag processing and oil and gas removal by use permit. 35 ft. 50% coverage
F Farmlands (21.30)	Commercial agriculture	Farm stands and ag processing under the Farmlands rules
Rural grazing and permanent grazing (21.32, 21.34)	Range and grazing land in the hills	Very limited business uses

Commercial uses in town and on yard sites

Light Commercial. The LC chapter, most recently amended by Ordinance 5422 on August 27, 2024, uses three permit levels:

Administrative permit. Convenience markets, hardware and drug stores, small banks, salons, florists, offices and cannabis retail.
Use permit. Restaurants, hotels and motels, service stations, auto repair, mini-warehouses and day care.
No permit. A change of commercial use that does not change the nature or intensity of the use.

Projects on lots over an acre, or with more than one use, need a General Development Plan.

Alcohol and entertainment. Any business serving alcohol, any amusement venue and any live entertainment within 200 feet of a residential district boundary needs a use permit. In a town as compact as San Ardo, most LC lots will be within that distance, so plan on a hearing for a bar, a restaurant with alcohol or an event space.

Heavy Commercial. HC is the natural home for oil field and farm support businesses:

Administrative permit. Trade shops, auto repair, service stations and small mini-warehouses.
Use permit. Trucking operations with repair, fueling and dispatch, contractor yards, agricultural processing plants and produce warehouses. Oil and gas exploration and removal is also listed.

Housing on commercial land. In LC, housing is allowed by use permit only where its floor area does not exceed the commercial floor area.

Oil, floodway and groundwater policies in the South County plan

The South County Area Plan does not mention San Ardo by name, but several of its countywide policies bear directly on the town.

Oil and gas (SC-3.1). The plan prohibits drilling new oil and gas wells, and land uses that support well stimulation treatments, in every land use designation, consistent with General Plan Policy LU-1.21. Co-generation may be allowed with industrial and oil uses on industrial land, with a use permit for each project. Buyers of oil field service sites should confirm how this policy is being applied today, since existing operations and permits may be treated differently from new wells.
River floodways (SC-5.3). New development may not encroach on the main channels and floodways of the Salinas, Nacimiento and San Antonio rivers. San Ardo sits beside the Salinas River, so pull a flood determination on any low-lying parcel.
Groundwater (SC-5.1). Recharge areas are protected from new development, a real constraint in a town that depends entirely on wells.
Clustering (SC-1.2). Where development is permitted, the plan favors clustering to save farmland.

Lodging and short stays

Hotels and motels need a use permit in LC. The County’s short-term rental page explains that inland stays of 30 days or less need a permit in certain districts. Operators collect the County’s 10.5% transient occupancy tax.

Transfer tax, business tax and property tax

Monterey County Code Chapter 5.32 imposes $0.55 per $500 of consideration over $100, excluding liens that remain. There is no city tax in unincorporated San Ardo. Ask the County Treasurer-Tax Collector whether a county business license applies to your use. A sale generally triggers Proposition 13 reassessment. Mineral rights and oil leases may be assessed separately from the surface, so ask the assessor how a parcel’s rights are carried.

Due diligence that matters in San Ardo

Start with our commercial due diligence checklist, then add:

Confirm the zoning string, any height suffix and whether a General Development Plan exists.
Pull use permits for any restaurant, alcohol, motel, trucking or oil-related use.
Confirm whether the parcel is inside the San Ardo California Water District and whether the district can serve added demand.
Outside the district, test the well and inspect the septic system.
For any oil-related use, review state well records, surface and mineral ownership, and how SC-3.1 applies.
Order a flood determination for parcels near the Salinas River.

Questions people ask

Who issues building and use permits in San Ardo?

Monterey County. San Ardo is unincorporated, so County zoning and the South County Area Plan apply.

Can I open a restaurant or bar in San Ardo?

Restaurants need a use permit in LC, and any alcohol service within 200 feet of a residential district needs one too.

Are new oil wells allowed near San Ardo?

The South County Area Plan, as amended in 2025, prohibits drilling new oil and gas wells in all designations. Confirm current application with the County.

Where can a trucking or contractor yard go?

In HC with a use permit. Trade shops and small mini-warehouses need only an administrative permit.

Does the water district serve every parcel?

No. The district covers about 80 acres around town. Other parcels use private wells and septic.

Is there a transfer tax in San Ardo?

Only the county tax of $0.55 per $500.

Does Diamond handle commercial property in San Ardo?

Contact Matthew Martinez to discuss buying, selling or leasing commercial property in San Ardo.

Sources & notes

Note: References to the oil field are for orientation only. The LAFCO figures date from its 2015 review; confirm current district capacity directly. We did not verify San Ardo parcel zoning, the Farmlands and grazing chapters (described here from their titles and prior County research), General Plan Policy LU-1.21’s full text, or the current legal status of the oil well policy.

This page is general information, not legal or tax advice. Last reviewed October 2026 by Matthew Martinez.

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