Commercial Real Estate in Oakville: Legacy Commercial Zoning, Winery Permits and the Highway 29 Corridor

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

Oakville is a tiny unincorporated community on Highway 29 between Yountville and Rutherford, surrounded by some of the most closely regulated vineyard land in California. Its commercial property is mostly wineries and tasting rooms on agricultural land, plus a handful of older commercially zoned parcels near the highway, including the long-running Oakville Grocery. Confirm the zoning, General Plan treatment and use permit history for each parcel with Napa County Planning, Building and Environmental Services before relying on this page.

Who controls the parcel

Oakville has no town government, so Napa County decides land use under Title 18 of the County Code and its General Plan. The County’s Agricultural Preservation and Land Use Element explains several things specific to Oakville:

Not on the Land Use Map. Oakville and Rutherford are small commercial and residential centers along Highway 29 that the Land Use Map does not show. The element says this effectively blocks new development there and that little is expected.
1990 zoning carries forward. Under Policy AG/LU-97, land zoned commercial in Oakville and Rutherford as of February 1, 1990 may still be developed under that zoning, as if the map showed it.
Existing businesses. Policy AG/LU-45 lets existing commercial establishments in commercial zoning keep operating and add uses the zoning already allows, including mixed residential-commercial uses.
Voter approval. The element says Measure J (1990) requires a public vote to convert agriculturally designated land to other uses, and that Measure P, adopted by voters in 2008, carries these protections so they cannot be changed without a vote until after December 31, 2058.

For countywide rules, see our Napa County commercial guide.

Oakville zoning for commercial and agricultural business

District	Intended uses	Notes
AP Agricultural Preserve	Fertile valley-floor land where farming predominates	Wineries, tours and tastings by use permit. Agricultural processing by use permit
AW Agricultural Watershed	Hillside agriculture and watershed protection	Wineries by use permit
CL Commercial Limited	Uses for tourists and highway travelers on a state highway or arterial	Restaurants up to 100 seats, lodging up to 50 rooms and small markets by use permit
CN Commercial Neighborhood	Neighborhood shops and services	Every commercial use by use permit
PS Produce Stand and HR Historic Restaurant combining districts	Overlays for specific legacy uses	See below

Which district applies to a given Oakville parcel must be read from the County zoning map; we have not confirmed parcel-level zoning.

Wineries and the Agricultural Preserve

Most Oakville commercial value sits in wineries. The AP chapter, first adopted by Ordinance 511 in 1976 and last amended by Ordinance 1495 on September 24, 2024, allows agriculture and one home per legal lot by right. Wineries existing before July 31, 1974 may continue at their confirmed extent, but expansion needs a use permit. New wineries, crushing, bottling and storage, tours and tastings, and sales of wine-related products all require a use permit.

The General Plan element (Policy AG/LU-13) explains that for wineries approved after the 1990 Winery Definition Ordinance, tours and tastings by appointment, retail sales of wine made mostly from Napa grapes, education and limited food service count as agricultural processing only while they remain accessory to the winery. The County’s winery standards in Chapter 18.104 add, among other things:

a 10-acre minimum parcel for a new winery
at least 75% Napa County grapes for new production
a 600-foot setback from the centerline of Highway 29 or Silverado Trail, and 300 feet from other public roads
accessory space capped at 40% of production space

A buyer of an Oakville winery is mostly buying its use permit: production gallons, visitor and event limits, and hours. Read it before anything else.

Oakville AVA. The federal Oakville viticultural area at 27 CFR 9.134 took effect August 2, 1993, under a final rule published July 2, 1993. The petition described roughly 5,760 acres between Yountville and Rutherford. Its northern line follows Skellenger Lane, shared with Rutherford, and it reaches to the 500-foot contour on the Mayacamas side and the Backus Terraces on the Vaca side. The AVA is a wine-labeling designation, not zoning, but it affects the value of grapes and wineries within it.

Legacy commercial parcels and historic buildings

CL uses. Where the 1990 commercial zoning is CL, the chapter lists the use-permit options:

restaurants, cafes, delis and bars of up to 100 seats
inns, motels and B&Bs of up to 50 rooms
grocery, candy, ice cream or liquor stores under 5,000 square feet
art galleries and tourist information
a winery inside an existing building already in commercial wine use

Lots are a half acre with public water and sewer, otherwise one acre.

Produce stand and restaurant overlays. The General Plan element notes two voter-approved changes. Measure K (2008) lets a parcel zoned for an agricultural produce stand add an accessory deli, outdoor barbecue and wine tasting. Measure D (1998) lets qualifying restaurants in the Historic Restaurant combining district add seats within existing buildings. That district covers restaurants that existed on April 22, 1998 and had at least 200 seats in 1985. It allows up to 200 seats but bars expanding buildings, parking or patios beyond their 1998 extent without a use permit.

Historic reuse. The element says owners of County landmark or National Register buildings in Oakville and Rutherford may seek approval to reuse them if they are rehabilitated to the Secretary of the Interior’s standards. It names St. Stephen’s Episcopal Church at the base of Oakville Grade as part of the area’s history and describes the Oakville Grocery, open since the early 1900s, as a landmark many travelers stop at.

Highway access. Under Policy AG/LU-98 the County supports safety and access improvements at Highway 29’s intersection with Oakville Cross Road.

No vacation rentals. Section 18.104.410 bars transient occupancy of dwellings in residential and agricultural districts.

Transfer tax, business tax and property tax

Napa County’s document transfer tax page sets $0.55 per $500 of value and notes the seller customarily pays in Northern California; unincorporated Oakville has no city tax. Ask the Treasurer-Tax Collector about lodging tax and business licensing. A sale generally triggers Proposition 13 reassessment, and vineyard land under a Williamson Act contract is assessed on a different basis, so check for one.

Due diligence that matters in Oakville

Start with our commercial due diligence checklist, then add:

Confirm the zoning and whether the parcel was zoned commercial on February 1, 1990.
Pull every use permit; for a winery, check gallons, visitors, events and grape-sourcing conditions.
Measure road setbacks from Highway 29 and Oakville Cross Road for any new structure.
Check for HR or PS overlays and what they allow.
Confirm historic status before altering an older building.
Check wells, septic and wastewater capacity, and any Williamson Act contract.

Questions people ask

Can new commercial zoning be added in Oakville?

Very unlikely. Oakville is not on the Land Use Map, and converting agricultural land generally needs a public vote under Measures J and P.

What happens to Oakville’s existing commercial parcels?

Land zoned commercial as of February 1, 1990 may still be developed under that zoning under Policy AG/LU-97.

Does a winery need a use permit in Oakville?

Yes, for any new winery or expansion. Pre-1974 wineries may continue at their confirmed extent.

How big must a parcel be for a new winery?

At least 10 acres on AP or AW land.

Is Oakville its own wine appellation?

Yes. The Oakville AVA took effect August 2, 1993 at 27 CFR 9.134. It is a labeling rule, not zoning.

Is there a transfer tax in Oakville?

Only the County’s $0.55 per $500.

Does Diamond handle commercial property in Oakville?

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

Sources & notes

Note: Winery standards from Chapter 18.104 were reviewed for our Angwin page. We did not confirm parcel zoning, whether any Oakville parcel carries the HR or PS overlay, or the produce stand chapter text. The General Plan’s descriptions of Oakville date from about 2006.

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

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