The Williamson Act is a State program that preserves agricultural and other open space lands. In exchange for committing land to agricultural uses for at least 20 years, landowners receive significant tax breaks. In Sacramento County the Office of Planning and Environmental Review initiates and processes applications to establish Williamson Act land conservation agreements. The same department processes applications to "non-renew" agreements. The County Assessor's Office is responsible for calculating and assessing tax reductions related to the Williamson Act contracts.Agricultural Land Preservation

This PDF map set provides a countywide overview of Williamson Act contracts (as of 2012).

Williamson Act Parcels (Non-Renewed) Layer. This is the official GIS layer representing the Williamson Act Parcels with a Contract that has been non-renewed within unincorporated areas of Santa Clara County.

Last Updated: 5/14/2025 by EWilhelm_Admin1Field Listing:parcelid: Parcel APN IDtaxmapnumb: Tax map numbersitenum: Site address numbersiteroad: Site road nameparceladdr: Full parcel addresssitecity: Parcel's cityunitbldg: Building unit numbersubdiv: Benicia sub-divisionrollyear: Current Tax Roll Yearacres: Measured acreagelotsize: Lot size in square feetLANDUSE: Land Use designationZONING: Zoning designationGENERAL_PLN: General plan designationShorLn_OVL: Shoreline overlay designationHistoricD: Historic District designationHistoricLM: Historic Land Mark designationCont_B: Contributing Building designationSix_L: Six L designationArsenalHD: Arsenal Historic District designationArsenalHL: Arsenal Historic Landmark designationArsenalCB: Arsenal Contributing Building designationArsenalPCB: Arsenal potential Contributing Building designationHSG_OPP: Housing OpportunitiesMills_Act: Mills Act, Yes or No?MA_MAIN: Mills Act Maintained, Yes or No?MA_Date: Date of Mills Actxcentroid: X axis centerycentroid: Y axis centerassessorma: URL link to Solano County Accessor Map PDFpropertych: URL Link to Solano County Property Chart PDFtaxinfo: URL Link to Solano County Tax Info PDFusecode: County use codeuse_desc: County use descriptionqclass: Quality Classyrblt: Year parcel was constructedstatus: PIN Statusvalland: Land Value valimp: Improvement Valuevaltv: Trees & Vine Value valfme: Fixed Machinery & Equipment Value valpp – Personal Property Value valpen: Penalty Value situs: Site Address (YS/NO)williamson: Williamson Act?wa_status: Williamson Act Status Codewa_contrac: Williamson Act Contract Numberwa_prime: Total Prime Acreagewa_nonprim: Total Nonprime Acreagewa_exclude: Total Excluded Acreagepcl_create: Parcel Creation Datepcl_inactd: Parcel Inactivation Datefirst_area: Property area 1second_are: Property area 2third_area: Property area 3other_area: Property area (Other)garage_are: Garage areatotal_area: Total property areastories: Amount of stories in the housebedroom: Amount of bedrooms in housebathroom: Amount of bathrooms in housedining: Dining room?family: Family room?other_room: Other rooms?utility: Utility spacetotal_room: Total rooms in homefireplc: Fire place?hvac: HVAC?pool: Pool on property?solar Solar on property?tac: TAGtac_city: TAG city namegovt_owned: Is parcel government owned?hotype: Home Owner Exemption Typezone1: Zoning Code #1 (this field is currently inactive and not being updated)zone2: Zoning Code #2 (this field is currently inactive and not being updated)z2acres: Zoning Code #2 Acreage (this field is currently inactive and not being updated)remark: Editor notedlndivnum: Land Division Number (this field is currently inactive and not being updated)lndivdate: Land Division Date (this field is currently inactive and not being updated)site_statu: Zoning Site Status (this field is currently inactive and not being updated)pudnum - Public Utility District Number (this field is currently inactive and not being updated)datevar – Date Verified (this field is currently inactive and not being updated)varnum – Variance Number (this field is currently inactive and not being updated)plfiltyp1 – File Type 1 (this field is currently inactive and not being updated)plfilno1 – File 1 Number (this field is currently inactive and not being updated)plfiltyp2 – File Type 2 (this field is currently inactive and not being updated)plfilno2 – File 2 Number (this field is currently inactive and not being updated)fund_fire – Fire District desc_fire - Fire District Description fund_school - School District desc_school – School District Description fund_water – Water District desc_water – Water District Description fund_air_board – Air Board District desc_air_board - Air Board District Description fund_soil_cons - Soil Conservation District desc_soil_cons – Soil Conservation District Description Acreage_Diff - Acreage DifferenceParcel2: ?Label: Field used to label parcelsHighestTide: Waterfront Residential Height LimitationAffd_HSing: Affordable Housing designationReal_Lease: Real estate Leasing Info