Parcel data by state

Free parcel data in California

California has no single free statewide parcel layer we could verify, but many counties publish their own. Basesheet currently uses 18 California county services: Alameda, Contra Costa, Fresno, Los Angeles, Marin, Monterey, Orange, Placer, Riverside, Sacramento, San Bernardino, San Diego, San Francisco, San Joaquin, Santa Barbara, Santa Clara, Sonoma, Ventura.

County layers

Alameda County

Hosted FeatureServer, native SR Web Mercator; reprojects on request (2227 and 2229 tested). APN is the unpadded printed form book-page-parcel[-subparcel], e.g. '2-91-2' or '48-5597-3-1' (PrintParcel is identical). Zero-padded input such as '002-0091-002-00' returns nothing, so strip leading zeros from each part and drop a trailing '-00'/'-0' sub-parcel. APN_SORT is the padded sort key ('002 009100200': 3-digit book, space, 4-digit page, 3-digit parcel, 2-digit sub-parcel). SitusAddress is the full situs line including city and ZIP ('1225 FALLON ST OAKLAND 94612'); SitusStreetNumber/SitusStreetName/SitusUnit hold the parts and SitusCity the situs city. MailingAddress* fields are the owner mailing address. No owner name, legal or plat fields; LatestDocument_Prefix + LatestDocumentSeries give the latest recorded document (e.g. 2000-071033).

Contra Costa County

MapServer layer behind the county's public Parcel Viewer; native SR Web Mercator, reprojects on request (2226 and 2229 tested). APN is 9 digits with no dashes ('373163001'); parcel_dashes is the printed 3-3-3 form ('373-163-001'); APN_CHECK is a separate check digit, not part of the APN. full_address_search is the situs street line (number + street, space padded; just the street name when the parcel has no number); full_address_display adds ', CITY'; s_city is the situs city (S_CTY_ABBR is a 5-letter code such as 'MRTNZ'). N_* fields and full_n_address / N_CTY_ST are the owner mailing address. No owner name field. DESC_ is a short assessor legal description; C_DED_NBR / C_DED_DT are the last deed document number and date (YYYYMMDD). assr_url links the assessor map PDF. The Assessor folder on the same server requires a token; this CCMAP layer does not.

Fresno County

Hosted FeatureServer on the county's own ArcGIS Enterprise, native SR Web Mercator; reprojects on request (2228 and 2229 tested). apn is the assessor number without dashes, usually 8 characters but with letter suffixes on some parcels ('46609401T', '01503017ST'; printed 466-094-01T). apn12 is the 12-digit padded form ('466094001000'). Try apn with dashes stripped first, then apn12. agency_cod is a jurisdiction code (e.g. CY county, FR, CL), not a situs city. Fields are only fid, apn, apn12, agency_cod, active_dat, roll_year: no situs, owner, deed or legal attributes. The same server has an attributed FC_PARCEL_SELECT MapServer (owner names, site address) that backs the county permit system; it is not used here because the county says ownership is not provided online and that layer carries no public-use statement.

Los Angeles County

MapServer layer, native SR Web Mercator; reprojects to State Plane on request. AIN is the 10-digit assessor ID with no separators, e.g. '5161004909'; APN is the same number dashed 4-3-3, e.g. '5161-004-909'. Users usually type the dashed form, so try APN with dashes and AIN with digits only. SitusAddress is the street line ('500 W TEMPLE ST'); SitusFullAddress adds city/state/ZIP. SitusCity carries a trailing ' CA' ('LOS ANGELES CA'), so strip it for display. No owner name field (LA County does not publish owners in this layer). No deed or plat book fields; Assr_Map holds the assessor map reference.

Marin County

FeatureServer layer 13 ('Parcel') of the county BaseMap service; native SR EPSG 2872 (CA zone 3 ftUS HARN); reprojects on request (2226 and 2229 tested). Prop_ID is the APN in dashed 3-3-2 form ('179-270-11'); undashed input returns 0, so insert dashes. SitusFormatted is the situs street line (trailing space); SitusFormattedCity is 'street, CITY'; Jurisdiction is the city or unincorporated area the parcel lies in (not a postal city), so city_field is left empty. PublicOwnerNameStandard is filled only for publicly owned parcels (about 4,200, e.g. 'COUNTY OF MARIN') and empty for private owners. No deed, plat or legal fields. The county also publishes a geometry-only copy on ArcGIS Online (services6.arcgis.com/T8eS7sop5hLmgRRH/arcgis/rest/services/PARCEL1/FeatureServer/0, APN field 'Parcel', same disclaimer). The server returns HTTP 403 to the default Python-urllib User-Agent (python-requests, curl and browser UAs get 200), so send an explicit User-Agent.

Monterey County

FeatureServer, native SR EPSG 2228 (CA zone 4 ftUS); reprojects on request (2229 tested). APN is 12 digits with no dashes ('002244099000'); APN_FORMAT is the dashed 3-3-3-3 form ('002-244-099-000'). Printed APNs often omit the trailing '-000', so append it when only 9 digits are given. No situs address field and no owner field. City is the incorporated city name or blank/unincorporated (a jurisdiction, not a postal situs city), so city_field is left empty; Jurisdiction and Community are also available. Legal_Description holds the assessor legal ('RIKERS ADD TO SALINAS POR LOTS E F G & H BLK 6'); Subdivision is often the literal string 'None'. Current_Document_Number is the latest recorded document (trailing spaces). Many overlay attributes (zoning, flood, fire hazard, coastal zone) are included.

Orange County

FeatureServer, native SR EPSG 2230; reprojects on request (2229 tested). Geometry is LEGAL LOTS joined to assessor attributes, not one outline per APN: a parcel spanning several recorded lots returns one polygon per lot (APN '008-067-47', Santa Ana City Hall, returns 10), so union all features for an APN to draw the parcel. Condos are stacked identical polygons covering the whole lot. AssessmentNo keeps dashes: regular parcels are 3-3-2 ('008-067-47'), condo/unit APNs 3-2-3 ('930-45-060'); undashed input ('00806747') returns nothing, so insert dashes. SiteAddress is the situs street line (often null on public property); SiteCityState is the situs city (no state despite the name); MailAddress is the owner mailing address. 'Name' is the lot/block label ('1 / C'), not an owner; there is no owner field. DocNum is the recorded map book/page (e.g. 'MM 203/5-20', or '<MAP>' when unknown); MapNum is the tract ('TR 5438'); DocRefNo is the latest recorded document number (12 digits, year first). Same server also publishes an assessor-outline layer at Map_Layers/Parcels/FeatureServer/0 (ASSESSMENT_NO, SITE_ADDRESS only) as a fallback.

Placer County

Hosted FeatureServer, native SR Web Mercator; reprojects on request (2226 and 2229 tested). Apn is dashed 3-3-3-3 ('001-032-034-000'); undashed input returns 0 and printed APNs often omit the trailing '-000', so format as BBB-PPP-PPP-000 (or match LIKE 'BBB-PPP-PPP%'). FormattedSitus1 is the situs street line, FormattedSitus2 is 'CITY CA ZIP' (no separate city field). No owner, deed or legal fields. Do NOT switch to the richer 'County Parcels - Public View' service in the same org: its layer metadata says 'Terms of Use: INTERNAL - PLACER COUNTY EMPLOYEES ONLY' even though the item is shared publicly.

Riverside County

MapServer layer 50 (PARCELS_CREST) in the OpenData/Assessor service; native SR EPSG 2230, reprojects on request (2229 tested). APN is a 9-digit string with no dashes, e.g. '215372014' (printed 215-372-014); dashed input returns 0, so strip dashes. SITUS_STREET is the site street line; CITY is the situs city name (SITUS_CITY is city+state+ZIP, e.g. 'RIVERSIDE CA 92501'); MAIL_STREET / MAIL_CITY are the owner mailing address. No owner name field is published here despite the layer description listing PRIMARY_OWNER. MAP_BOOK_PAGE is the recorded map reference (RECORDER_MAP_TYPE + BOOK/PAGE, e.g. 'MB 7/34'; types AM assessor map, CM condo map, MB map book, PM parcel map, RS record of survey). FLAG marks special parcels (PI possessory interest, condos, mobile homes). Layer 40 (PARCELS) is the same geometry with only APN/FLAG and includes ROW polygons. The server returns HTTP 403 to the default Python-urllib User-Agent (python-requests, curl and browser UAs get 200), so send an explicit User-Agent.

Sacramento County

MapServer layer 3 ('Parcel Boundaries, Level 16-20') in the PARCELS service; native SR EPSG 2226 (CA zone 2 ftUS), reprojects on request (2229 tested). Three APN forms are stored: APN_DASH '002-0143-017-0000' (3-4-3-4, zero padded), APN10 '0020143017' (book-page-parcel, no sub-parcel) and PARCEL_NUMBER '00201430170000' (14 digits). Users often type the short printed form 002-0143-017, so pad and try APN10 first if no 4-digit suffix is given. SITUS_ADD1 is the situs street line, SITUS_ADD2 is 'CITY, CA ZIP', CITY is the situs city; MAIL1/MAIL2/MAIL_CITY are the owner mailing address. NAME/OWNER/CARE_OF_NAME all read 'OWNER OF RECORD' (owners withheld), so no owner field is mapped. RECORDED_DOCUMENT_LABEL is the latest recorded document as 'YYYYMMDD.O.R.page' (e.g. '20181214.O.R.1377'). SUBDIVISION holds the subdivision code ('S281008'), SUB_NAME its name, LOT the lot. Layer 8 (Active GIS Parcel Base) has the same schema. The county open data portal also hosts a slimmer copy at services1.arcgis.com/5NARefyPVtAeuJPU/arcgis/rest/services/Parcels/FeatureServer/0 (field APN = 14-digit form, explicit CC public domain license).

San Bernardino County

Hosted FeatureServer, native SR Web Mercator; reprojects on request (2229 tested). ParcelNumber is the 9-digit book-page-parcel with no dashes, e.g. '013511117' (printed 0135-111-17; the 4-digit trailing sequence of the full 12-digit APN is not included). Dashed input returns 0, so strip dashes and drop any trailing '-0000'. PageMap is the 6-digit assessor book+page ('013511'). No situs address or situs city field (Jurisdiction is the city/unincorporated name, usable as a fallback place label). OwnerName is present but every record reads 'Protected Per CA Gov Code 7928.205', so it is not mapped. No deed, plat or legal fields.

San Diego County

MapServer layer, native SR EPSG 2230 (CA zone 6 ftUS); reprojects on request (2229 tested). APN is the 10-digit assessor number with no dashes, e.g. '5335900100' (printed form is 533-590-01-00); APN_8 is the first 8 digits (book-page-parcel, '53359001'). Users who type 533-590-01-00 need dashes stripped. Condos and possessory-interest records (APNs starting 760 etc.) are stacked duplicate polygons on the same footprint, so a point query can return many features (12 at the County Administration Center, 161 at a condo tower); prefer the record with ACREAGE set / lowest stacking or match by APN. No single situs string: the address is split into SITUS_ADDRESS (house number, integer), SITUS_PRE_DIR, SITUS_STREET, SITUS_SUFFIX, SITUS_POST_DIR, SITUS_SUITE, SITUS_ZIP, so situs_field is left empty and must be assembled. SITUS_JURIS is a 2-letter jurisdiction code ('SD' = City of San Diego, 'CN' = unincorporated), not a city name. Owner names are redacted in this public layer; no deed, plat or legal fields. Do not label the drawing as SanGIS-sourced at large scales without the 'derived from' wording (SanGIS asks not to be cited as sole source below 1:24,000).

San Francisco County

Hosted FeatureServer, native SR Web Mercator; reprojects on request (2227 and 2229 tested). The APN is block+lot: blklot is the unique APN, 4-digit block + 3-character lot, no separator ('0787001' = block 0787 lot 001; lots can carry letters, e.g. '0306T002A'). Users often write '0787-001' or '0787/001', so strip separators and zero-pad the block to 4 digits. Condominium units share one 2D footprint: each unit is a separate stacked record and mapblklot is the lowest APN in the set (about 72,700 records have blklot != mapblklot), so a point query on a condo building returns many features; dedupe by mapblklot to draw the lot once. No single situs string: from_address_num / to_address_num give the address range with street_name + street_type. No owner, deed or legal fields; pw_recorded_map marks parcels on the recorded-map basemap and in_asr_secured_roll marks roll parcels. Includes zoning_code / zoning_district from Planning.

San Joaquin County

Hosted FeatureServer, native SR EPSG 2227 (CA zone 3 ftUS); reprojects on request (2229 tested). APN is 8 digits with no dashes ('14916014', printed 149-160-14); dashed input returns 0, so strip dashes. LINK is a 9-digit variant with an extra digit ('149160014'). APN is not unique: some APNs have several polygons (multi-part parcels), so union all features for an APN. FULL_ADDRESS is the full situs line including city, state and ZIP ('44 N SAN JOAQUIN ST STOCKTON CA 95202'); SITUSCITY is a 2-4 letter code ('ST' = Stockton, 'UN..' = unincorporated areas), not a city name. MAILING_ADDRESS / MAIL* fields are the owner mailing address; CAREOF is a care-of line (often the agency for public parcels), not the owner name, so no owner field is mapped. No deed, plat or legal fields.

Santa Barbara County

Hosted FeatureServer, native SR EPSG 2229 (CA zone 5 ftUS); reprojection tested to 2228. APN is dashed 3-3-3 ('029-121-022'); undashed input returns 0, so insert dashes. Situs1 is the situs street line, Situs2 is 'CITY, CA ZIP', SCity the situs city. LAYER classifies each record ('Ground', 'Condo First Floor' ... 'Condo Ninth Floor', 'Mobile Home', 'Cabin', 'Basement', 'Island', 'Right of Way (Private)'); condo floors are stacked over the ground parcel, so for a base plan prefer LAYER = 'Ground'. DocNum is the latest recorded document number. No owner, legal or plat fields; BkPgLnk links the assessor map page. The layer was digitized from assessor map pages in the late 1990s and rubber-sheeted, so positional accuracy varies.

Santa Clara County

Hosted FeatureServer, native SR EPSG 2227 (CA zone 3 ftUS); reprojects on request (2229 and 2226 tested). APN is 8 digits with no dashes ('25904010'); APNdashed is the printed 3-2-3 form ('259-04-010'). Situs_Address_Full is the full situs line including city, state and ZIP ('70 W HEDDING ST SAN JOSE CA 95110'); there is no separate situs city field (AGOL_Situs_Search is a search helper without the direction). Document_Number is the last recorded document number (space-padded). No owner, legal or plat fields. The County's own mapservices.sccgov.org SCCProperty service was unreachable (TLS certificate for another host, then 404) on the test date, so this Planning-hosted copy is used.

Sonoma County

FeatureServer, native SR EPSG 2226; reprojects on request (2229 tested). APN keeps dashes in 3-3-3 form ('180-030-012'); undashed input returns 0, so insert dashes. SitusFormatted1 is the situs street line, SitusFormatted2 is 'CITY ST'; POCity is the situs postal city name, while SitusCity is a short code ('SR' = Santa Rosa). Type distinguishes regular parcels ('PCL') from other records. CurrentDocNum is the current recorded document ('1964R2083514'). No owner, legal or plat fields. Geometry is georeferenced from AP map pages of varying accuracy (RANK/DESCRIPTION fit notes are documented but not exposed here); not for boundary interpretation. Share-alike applies if the drawn parcel lines are redistributed as data; attribute 'County of Sonoma' on sheets.

Ventura County

Hosted FeatureServer, native SR Web Mercator; reprojects on request (2229 tested). APN is 9 digits with no dashes ('083006132'); APN10 is the 10-digit form with the trailing suffix digit ('0830061325', the attributed county copy calls it APN_SUFFIX). Printed APNs are dashed (e.g. 083-0-061-325), so strip dashes and try the first 9 digits against APN, all 10 against APN10. Fields are only APN, APN10, LAT, LON: no situs, owner, deed or legal attributes. The county's own server also exposes an attributed copy (maps.ventura.org/arcgis/rest/services/SDs/Parcels/FeatureServer/0, with SITUS, DOC_NR, TRACT) but it is not published as open data and the Assessor restricts roll attributes, so it is not used here.

How to use it

• QGIS: Layer > Data Source Manager > ArcGIS REST Server, add a connection with the service URL (the endpoint above without the final /0), then add the layer. Filter to your area before exporting.
• ArcGIS Pro: Add Data > Data From Path, paste the endpoint.
• Direct query: append /query?geometry=LON,LAT&geometryType=esriGeometryPoint&inSR=4326&spatialRel=esriSpatialRelIntersects&outFields=*&f=geojson to get the parcel at a point.
• CAD: see getting a parcel into AutoCAD or Civil 3D.

Assessor parcel lines are for taxation and are often 5 to 50 ft off the legal boundary. Why.