Why does a house a half mile from the nearest orchard get the same farmland disclosure as one that shares a fence line with it? In Brentwood, the answer sits in the fine print of two overlapping rules, and untangling them tells you more about the city's actual footprint than the sale listing ever will.
Most buyers expect a right-to-farm disclosure, if they get one at all, to show up only on properties that back directly onto an orchard or a row crop field. Brentwood runs two separate triggers, and they don't line up with each other or with the city limits.
Two disclosures, two different rulers
The first is local. Brentwood's Right to Farm Ordinance, spelled out in Chapter 8.01 of the city's municipal code, requires a seller to give buyers a written disclosure statement whenever a property sits within 2,000 feet of designated agricultural land inside city boundaries. The statement has to reach the buyer as soon as practicable after an offer is made, but no later than five days before the transfer of title closes, per the timing built into California Civil Code Section 1102.6a.
The second trigger is statewide and has nothing to do with city lines. Since a 2009 change to California law, sellers and their agents must disclose if a property sits within a full one-mile radius of land on the state's Important Farmland Map, a designation that covers prime farmland, farmland of statewide importance, unique farmland, farmland of local importance, and grazing land. That one-mile rule applies whether the parcel is inside Brentwood's city limits or out in the surrounding unincorporated Contra Costa County, where a meaningful share of Brentwood-area housing actually sits.
Stack those two thresholds and a given address can land in either disclosure, both, or neither, depending on exactly where it falls relative to two different maps that most buyers never see before they're deep in escrow.
Why a one-mile radius covers more ground than it sounds like
A mile doesn't sound like much until you look at what it's measuring against. Brentwood organizes its agriculture around an 11,000-acre zone the city calls its Agricultural Core, land the city has spent more than $12 million protecting through conservation easements arranged with the California Farmland Trust, permanently preserving 988 acres of it for farming rather than future subdivisions. That's not a shrinking edge case at the margins of town. It's a large, deliberately fixed block of land, and a one-mile buffer drawn around a block that size reaches into a lot of residential streets that don't read as rural at all.
The practical result is that the one-mile disclosure isn't a temporary quirk that fades as Brentwood keeps building. Conservation easements don't expire when a new phase of homes goes up next door. The farmland triggering the disclosure is, by design, staying farmland. Buyers weighing a Brentwood purchase should treat that proximity as a stable feature of the address, not a detail likely to disappear in five years.
What the paperwork is actually telling you
It helps to be precise about what the disclosure form does and doesn't say. It isn't a defect report about the house. The seller is certifying, to the best of their knowledge, that the property falls within the qualifying distance of agricultural land, and the buyer is acknowledging receipt of that notice, nothing more. The underlying legal protection behind it, California's right-to-farm law, exists to shield legitimate agricultural operations from nuisance lawsuits over the ordinary business of farming, the noise, dust, and odor that come with working land.
If a real conflict ever comes up between a homeowner and a neighboring farm operation, Brentwood's ordinance points to an actual channel for resolving it: a grievance procedure run through the Contra Costa County Agricultural Commissioner's Office, rather than a straight path to litigation. That's a detail worth knowing before a dispute ever starts, not after.
The same ground got a new label in 2024
Here's where the paperwork and the city's own marketing start describing the same acreage in two very different tones. In 2024, Brentwood was officially designated the "U-Pick Capital of the World," a title the city has leaned into hard enough to install new welcome signage at Vasco Road, at Deer Valley and Balfour, and at Highway 4 near the site of the planned Brentwood Innovation Center. The same year, the Alcohol and Tobacco Tax and Trade Bureau approved the Contra Costa American Viticultural Area, a federal wine appellation covering 167,146 acres that includes Brentwood, effective April 15, 2024, after a petition process the Contra Costa Winegrowers Association had been pursuing for more than five years.
Wineries inside that appellation, including Hannah Nicole Vineyards and Nunn Family Vineyards, can now put "Contra Costa AVA" on their labels. Outside producers like Cline Cellars and Bedrock Wine Company have sourced fruit from vineyards in and around Brentwood and neighboring Oakley for years, work that helped build the case for the designation in the first place.
Put the disclosure language next to the marketing language and the overlap is direct. The nuisance-notice text in a right-to-farm disclosure exists to warn a buyer about the noise, dust, and odor of nearby agricultural operations. The city's road signage and the federal AVA designation exist to tell the same buyer that those operations, the cherry orchards, the U-pick strawberry fields, the old-vine Zinfandel plantings, are the reason to want to live near Brentwood at all. The disclosure form isn't flagging a problem neighborhood. It's confirming you're adjacent to the exact asset the city spent five years lobbying Washington to put a name on.
What this means if you're on either side of the transaction
For a seller with a Brentwood property inside that one-mile or 2,000-foot radius, the disclosure obligation doesn't disappear and shouldn't be treated as an inconvenience to downplay. But it also isn't the liability it can feel like on paper. Proximity to protected farmland is proximity to the same soil now carrying a federal wine designation and a world-recognized U-pick reputation. Framed accurately, that context belongs in how the property is presented, not just in the disclosure packet.
For a buyer, the practical move is simple: don't assume the absence of a disclosure means the absence of nearby farmland, and don't assume a disclosure means something is wrong with the house. Ask which version applies to the specific parcel, the city's 2,000-foot rule, the state's one-mile rule, or both, since the two are measured differently and neither one automatically implies the other.
FAQ
Does a right-to-farm disclosure mean the property has a defect? No. It's a proximity notice tied to a distance threshold, not a report on the condition of the house. It tells the buyer that legitimate agricultural activity nearby is legally protected from nuisance claims.
What if there's an actual ongoing issue with a neighboring farm operation? Contra Costa County's Agricultural Commissioner's Office runs a grievance procedure specifically for these disputes, which is the intended first step before considering any legal action.
Will this disclosure go away as Brentwood keeps developing? Not for parcels near the Agricultural Core. The city's conservation easements are permanent agreements, so the farmland triggering the one-mile disclosure is designed to stay farmland rather than convert to housing over time.
If you're weighing a purchase or a listing anywhere near Brentwood's Agricultural Core, Cindy Alaimo can walk you through exactly which disclosure applies to a specific address and how to talk about that proximity accurately, whether you're the one signing the form or the one presenting the home.
