Buying Farmland and Rural Homes in Yolo County: Williamson Act, Easements and Mitigation

Yolo County protects farmland more firmly than most of California. Its planning documents describe extensive farmland-contract coverage, many parcels carry permanent conservation easements, and converting farmland to other uses requires protecting other land in its place. For a buyer of a farm, a ranchette or a rural home, those rules can matter as much as the house, the soil or the water.

Zoning, a Williamson Act contract and a conservation easement can impose separate limits on the same parcel. A purchase plan should account for each, together with the water supply. The Yolo County overview compares the county’s city and rural markets.

Williamson Act contracts

A Williamson Act contract keeps land in agricultural use for a rolling term in exchange for a property tax assessment based on its farm income rather than its market value. The contract runs with the land, so a buyer takes it on. The county’s General Plan reported 410,659 acres, about 67% of total county land, under contract in its historical baseline; that historical figure is not a current parcel-status search.

Before buying, ask whether the parcel is under contract, get a copy of the contract and any notice of nonrenewal, and ask the county what uses and home sites the contract allows. Leaving a contract usually takes years through nonrenewal, and cancellation is limited and costly. Our Williamson Act guide explains the process.

Conservation easements

A conservation easement can permanently limit development while retaining working agricultural use. The Yolo Land Trust’s conservation-and-mitigation article reports 41 easements on more than 5,600 acres acquired to satisfy mitigation requirements. Those are its mitigation holdings, not a stated total of all conserved acreage. Read the particular recorded easement and ask its holder which homes, farm buildings, operations and divisions it permits.

The county’s farmland mitigation rule

When a project converts farmland in the unincorporated county to another use, Yolo County’s agricultural mitigation ordinance generally requires permanently protecting other farmland: 3 acres for each acre of prime farmland converted, 2 acres for each acre of non-prime land, and 1 acre per acre in some priority areas near city spheres of influence and the Esparto growth boundary. The code also provides a limited in-lieu mechanism for qualifying smaller conversions, subject to its conditions; it is not automatic permission to convert any parcel under 20 acres. If you are buying land with a plan to change its use, ask the county early how the rule would apply, and budget for it.

Water: surface rights, wells and groundwater

Farm value in Yolo depends on water. Ask whether the land has surface water rights or district service, how much it has received in recent years, and whether those rights transfer with the sale. For wells, request permits, logs, pump tests and power bills. The Yolo Subbasin’s groundwater sustainability plan was approved by the state in October 2023; ask the groundwater agency how its management actions may affect future pumping on the parcel.

Homes on farmland

A rural home in agricultural zoning comes with farm neighbors. Expect dust, noise, spraying and early-morning equipment from neighboring farms, and ask the county about its right-to-farm disclosure. Ask whether the home is permitted as a primary or farm dwelling, whether a second unit is allowed, and whether the parcel can be divided at all under its zoning and any contract or easement. Check the well and septic records with Yolo County Environmental Health.

Vineyards and wine

Five American Viticultural Areas include Yolo land: Capay Valley, Clarksburg, Dunnigan Hills, Merritt Island and Winters Highlands, which Yolo shares with Solano County. Vineyard land is priced on planted acres, varieties, grape contracts and water, as well as the land. Our Yolo County vineyard and AVA guide and vineyard and winery property guides cover the due diligence.

Diamond helps buyers and sellers of farmland, ranches and vineyard property across the region. If you are selling, a Yolo County property valuation for land starts with these records.