Contra Costa County Vineyards for Sale: Every AVA Explained

Contra Costa County brings together East County vineyard blocks, Lamorinda hillside estates and part of Livermore Valley. Five AVAs include county land: Contra Costa, Lamorinda, Livermore Valley, San Francisco Bay and Central Coast. A rural parcel near Oakley and a residential hillside vineyard near Orinda can share a county while having very different operating economics and approval requirements.

For a purchase or sale, separate the vineyard’s production economics from the residence, other land, equipment and operating approvals. This guide connects the federal wine geography to the records that matter for Contra Costa County property; it does not represent current listing availability or a guarantee of development permission.

Every Contra Costa County AVA: federal boundaries and scope

Source: TTB’s current established-AVA directory and 27 CFR Part 9. County lists are an orientation aid. Use the regulation’s boundary description and approved maps to locate the planted block. Total AVA area is not planted acreage, a parcel-size rule or available property inventory.

The wine regions of Contra Costa County

Contra Costa AVA (East County and the Diablo Valley)

Its boundary passes the Clayton area and the Walnut Creek and Lafayette line, and it reaches the Delta edge near Bethel Island and the San Joaquin County line. Cool marine air comes in through Suisun Bay and settles in the low ground, so nights cool down. The petition named Zinfandel, Petite Sirah, Mourvèdre, Chardonnay and Cabernet Sauvignon as well suited to the area. The petitioner left out Walnut Creek because it is mostly residential, and Jersey Island because its mucky soils are poor ground for vines.

For a vineyard marketed as old vine, establish the planting history, replacement vines, root condition and producing area. The label alone does not show crop quality, commercial buyer commitments or the cost of keeping the block in production. Compare actual receipts and management requirements before assigning a property premium.

Lamorinda

TTB described moderate-to-steep hills and narrow valleys. Most vineyard work there is done by hand because the slopes are too steep for machines. The soils come mostly from the Orinda Formation, with a high clay content. Thin soils on steep ground drain fast, which TTB said reduces disease and rot. Ridgelines block much of the fog and marine air, so Lamorinda is warmer than the areas around it.

Livermore Valley, San Francisco Bay and Central Coast

Livermore Valley extends into Contra Costa as well as Alameda County. Its nesting within San Francisco Bay and Central Coast does not establish that the same local planning rules apply on both sides of the county line. The Contra Costa AVA itself is also now encompassed by both regional appellations under TTB’s 2024 action.

Grape market: what the crush report shows

The Final 2025 Grape Crush Report was released April 30, 2026. The following figures use Table 2 wine-grape tonnage and Table 6’s TOTAL WINE weighted average grower returns per ton on a delivered basis for purchased grapes. They are not AVA-specific prices or vineyard land values.

The reporting district and the wine appellation are different geographic systems. This district includes other counties, so the average should not be described as a Contra Costa County-only price.

For valuation, begin with the vineyard’s actual fruit contracts: price formula, buyer, duration, assignability, quality specifications and rejection terms. Compare documented yield and collected receipts with farming and capital costs. A district average is context; it does not show a particular block’s saleable crop or net income. See vineyard valuation for the property analysis.

Zoning and farmland rules

The county adopted Agritourism Ordinance 2024-06 on March 5, 2024. It regulates visitor activities as accessories to a working agricultural operation, rather than making every agricultural parcel an unrestricted event venue. The county’s adopted record distinguishes ministerial and land-use permit routes for winery uses, including whether tasting or on-site sales are proposed. Apply the final ordinance and current code, not an earlier Planning Commission draft. General Plan designations, the Urban Limit Line, Delta location and existing permit conditions are separate checks; incorporated Brentwood, Oakley, Antioch, Lafayette, Moraga and Orinda apply their own city rules. See the responsible county’s current guidance and source record.

Local land-use permission, California ABC licensing and TTB wine-premises approval are separate requirements. A Type 02 winegrower license authorizes wine production and sales within its privileges; it does not approve a residence, tasting room, event program, water system or wastewater arrangement under local law.

For land under a Williamson Act or Farmland Security Zone contract, obtain the recorded contract, preserve rules and any nonrenewal notice. The restrictions bind later purchasers. Enrollment does not guarantee a particular tax saving, and a sale does not automatically terminate the contract. Conservation easements must be reviewed independently.

Water

On the Delta side, separate the irrigation source from drainage and flood protection. A vineyard may depend on a well, district deliveries or surface-water rights, while levees and drainage pumps protect the crop and improvements. In Lamorinda, a small planted block can have a different service arrangement from the residence. Use DWR’s basin map and the current local groundwater agency record for the actual parcel; county boundaries and AVA lines are not groundwater-management boundaries. Review the source documents, service capacity and operating history before assuming an existing supply supports a winery or public visitation.

Sources: official water-agency guidance, DWR basin prioritization and maps and the SGMA Portal for current plans, alternatives and agency records. Our vineyard water-rights guide explains the records to assemble. A groundwater-plan approval is not a transferable water right or a property-specific supply guarantee.

Fire, smoke and other hazards

Use the State Fire Marshal’s current Fire Hazard Severity Zone maps for the actual parcel and confirm local adoption where applicable. State Responsibility Area maps took effect in April 2024; the state released its Local Responsibility Area recommendations in 2025. Hazard classification describes the mapped hazard, not a guarantee of property-specific loss or insurance terms.

A hillside or forested parcel and a level production block can have different access, vegetation and emergency-response constraints. Obtain an insurance quote, inspect access and water storage, and review defensible-space and improvement conditions before removing contingencies. For a producing vineyard, obtain smoke-exposure, fruit-testing and buyer-rejection records separately from the property’s burn history.

Due diligence checklist for Contra Costa County vineyard land

1. Map each planted block against the current CFR boundary and establish the actual county or city land-use jurisdiction.
2. Obtain current zoning, overlays, the legal parcel record and the approvals for the specific existing and proposed uses.
3. Read recorded agricultural contracts, conservation easements, access and utility agreements; identify obligations that continue after sale.
4. Separate planted, bearing, harvested and usable expansion acreage; obtain block maps, planting years, varieties, rootstocks and condition records.
5. Read fruit contracts, collected receipts, yield history, rejection terms and operating costs; distinguish land value from an operating business.
6. Verify the water source, rights or service agreement, current agency requirements, seasonal capacity, quality, storage and any drainage obligations.
7. Review building and wastewater approvals, physical access, parcel hazards and an insurance quote before relying on expansion potential.

For the full analysis, see vineyard due diligence.

How Diamond works on Contra Costa County vineyard property

Diamond Real Estate Group can help frame a vineyard acquisition or sale around the property’s actual economics, usable land, water and approvals. Owners seeking a private discussion can describe their location, planted acreage, intended use and confidentiality preferences; this is an inquiry, not a promise of off-market inventory or a completed valuation.

Start with vineyard valuation, buying a vineyard or selling a vineyard. Compare neighboring regions from the vineyards and wineries hub, or contact Diamond to discuss the property.

Questions people ask

What AVAs are in Contra Costa County?

Five: Contra Costa (27 CFR 9.291), Lamorinda (9.254), part of Livermore Valley (9.46), and the regional San Francisco Bay (9.157) and Central Coast (9.75) AVAs.

When did the Contra Costa AVA become official?

TTB published the final rule on March 15, 2024, and it took effect April 15, 2024.

How big is the Contra Costa AVA?

TTB stated approximately 167,146 acres when establishing it in 2024. That is the AVA’s total geographic area, not planted vineyard acres or available property inventory.

Is Contra Costa AVA inside San Francisco Bay and Central Coast?

Yes. TTB expanded the two regional AVAs in the same 2024 action so they encompass the Contra Costa AVA.

What is the Lamorinda AVA?

It is the federal wine area around Lafayette, Moraga and Orinda, nested within San Francisco Bay and Central Coast. Confirm the planted block with 27 CFR 9.254; hillside access and workable planting area are separate property questions.

What grapes grow in East Contra Costa?

The AVA petition named Zinfandel, Petite Sirah, Mourvèdre, Chardonnay and Cabernet Sauvignon. The old vineyards near Oakley and Brentwood are mainly Zinfandel, Mourvèdre and Carignane.

Which crush district covers Contra Costa County?

District 6, shared with Alameda, Santa Clara, San Francisco, San Mateo and Santa Cruz counties. District 6 crushed 15,446.0 tons in 2025.

How does an Agricultural Core designation affect a vineyard?

It is a land-use designation separate from the AVA. Check the current General Plan map, zoning and proposed use for the parcel rather than assuming every East County vineyard has the same density or visitor permissions.

Can I open a winery tasting room in unincorporated Contra Costa County?

The county’s adopted agritourism ordinance distinguishes winery uses with tasting or on-site sales from those without them. Confirm the current permit route and all applicable standards, including the working-agriculture requirement, for the specific parcel.

How do I check groundwater requirements in East Contra Costa?

Locate the parcel on DWR’s basin map and obtain the current groundwater agency’s plan and rules. Then confirm the property’s actual source, well performance or service agreement; an AVA name does not establish pumping permission.

Does the Urban Limit Line affect vineyard land?

It is a separate land-use constraint to check with the current county General Plan and parcel map. Being outside an urban boundary does not itself authorize a winery, subdivision or event use.

Related property guides

• Livermore Valley guide
• Alameda County AVA page
• vineyard water rights
• vineyard due diligence
• 1031 exchanges for vineyard and ranch land
• California wine regions: the statewide guide
• Contra Costa County real estate
• Contra Costa County home valuation
• Solano County vineyards and AVAs

Sources & notes

Sources checked October 29, 2026. Federal boundary and district data provide regional context; they are not a survey, a property appraisal or a permit determination. Establishment acreage describes the federal area at the stated date, not current planted acreage or available listings.

• TTB established-AVA directory
• Current 27 CFR Part 9
• CDFA / USDA NASS Final 2025 Grape Crush Report, Tables 2 and 6
• County land-use source
• DWR basin prioritization
• DWR SGMA Portal
• State Fire Marshal hazard maps
• Department of Conservation Williamson Act guidance
• California ABC license types
• TTB wine-premises permits
• TTB Contra Costa establishment notice
• Contra Costa final rule and boundary expansion
• Lamorinda final rule and regional features

This educational guide summarizes the linked sources and property considerations. It is not legal, tax, water-rights, licensing or permitting advice. Rules, agency decisions and property conditions can change. Confirm the current requirements and recorded rights for the specific parcel with the responsible authority and appropriate advisers. No professional review, approval, tax outcome, supply availability or investment return is guaranteed.