Free parcel data in Louisiana

Louisiana has no single free statewide parcel layer we could verify, but many counties publish their own. Basesheet currently uses 5 Louisiana county services: Calcasieu, East Baton Rouge, Lafayette, Orleans, St. Tammany.

County layers

Calcasieu County

Layer	Calcasieu Parish Parcels (Hub layer)
Publisher	Calcasieu Parish Police Jury GIS (lak-dc-arcgis2.cppj.net)
Coverage	All of Calcasieu Parish (about 168,000 parcels)
Data vintage	Police Jury parcel layer for its open data hub, joined to assessor and zoning attributes (item updated mid-2026)
Terms	Public, no token; no license or use constraints stated on the service or item
Fields	parcel number (ASSESSMENT, PIN); site address (PHYSICALAD); owner (NAME); legal description
Not published	deed references, plat references
REST endpoint	`https://lak-dc-arcgis2.cppj.net/arcgis/rest/services/HubLayers/Parcels/FeatureServer/0`
Last verified	2026-10-20 with a live point and parcel-number query

FeatureServer on the Police Jury's own ArcGIS Server, published for its open data hub. ASSESSMENT is the 8-digit zero-padded assessment number, e.g. '00567973'; PIN is the assessor parcel number with dashes and internal blank padding, e.g. '061008-0677- -0006', so match it exactly or with LIKE. PHYSICALAD is the situs without city; ADDRESS1/ADDRESS2 are the owner mailing address. DESCRIPTIO is a fixed-width assessor legal block that embeds deed book/page references (REF1.. B 1955 P 557). ZONE/Zn_Descr carry parish zoning from a spatial join. Several OBJECTID_n columns are join leftovers.

East Baton Rouge County

Layer	East Baton Rouge Tax Parcels 2026
Publisher	City of Baton Rouge / Parish of East Baton Rouge GIS (EBRGIS ArcGIS Online org), Assessor data
Coverage	All of East Baton Rouge Parish (about 205,800 parcels)
Data vintage	2026 Assessor tax parcels (updated annually)
Terms	Public, no token; item licence text 'For public use'; EBRGIS / EBR Assessor's Office
Fields	parcel number (ASSESSMENT_NUM, PRONO); site address (PHYSICAL_ADDRESS); owner (OWNER); legal description; subdivision
Not published	deed references, plat references
REST endpoint	`https://services.arcgis.com/KYvXadMcgf0K1EzK/arcgis/rest/services/Tax_Parcels_2026/FeatureServer/0`
Last verified	2026-10-20 with a live point and parcel-number query

Hosted FeatureServer in the consolidated City-Parish's 'East Baton Rouge GIS Map Portal' ArcGIS Online org. Use this instead of maps.brla.gov Cadastral/Tax_Parcel/MapServer/0: that service returns zero features for any outFields=* query (its SALE_YEAR field breaks the response). ASSESSMENT_NUM is the dashed assessment number, e.g. '012-9624-8'; PRONO is the same digits as an integer (1296248). PHYSICAL_ADDRESS has no city. LEGAL_DESCRIPTION contains CR/LF line breaks. LOT, BLOCK and WARD_SECTION are present; no deed or plat book fields. The service name carries the tax year, so expect a Tax_Parcels_2027 next year.

Lafayette County

Layer	Lafayette Parish Parcels with CAMA Data
Publisher	Lafayette Consolidated Government GIS (maps.lafayettela.gov), assessor CAMA join
Coverage	All of Lafayette Parish (about 117,000 parcels)
Data vintage	LCG parcel fabric joined to Assessor CAMA, rebuilt periodically (last build 2026 at verification)
Terms	Public, no token; no license or use constraints stated on the service
Fields	parcel number (ASMNTNUM, ASSMT_NUM); site address (PROPERTY_LOCATION); owner (OWNERS); legal description; subdivision
Not published	deed references, plat references
REST endpoint	`https://maps.lafayettela.gov/arcgis/rest/services/MGO/MGOParcelsService/FeatureServer/0`
Last verified	2026-10-20 with a live point and parcel-number query

FeatureServer layer used by LCG's MGO permitting app; answers point queries in well under a second. ASMNTNUM is the bare assessment number, e.g. '6000180'; ASSMT_NUM is the same with a 'PAR-' prefix ('PAR-6000180'). PROPERTY_LOCATION is free text, sometimes a block range ('800 BLK SAINT JOHN ST,') with a trailing comma, and has no city. OWNERS lists all owners joined by ',,'; MAIL_LINE1 holds the first owner name. PROPERTY_TRANSACTIONS lists instrument numbers with dates, not book/page. The sibling BaseLayers/LCG_Parcels_with_CAMA_Data_View service has the same data plus Plat_num but takes ~40 s per outFields=* query, so it was not used.

Orleans County

Layer	Orleans Parish Assessor Parcels (Parcels_To_Join)
Publisher	City of New Orleans GIS (consolidated city-parish, maps.nola.gov), Orleans Parish Assessor parcel geometry
Coverage	All of Orleans Parish (about 163,600 parcels)
Data vintage	Assessor parcel geometry published for tabular joins (current)
Terms	Public, no token; no license or use constraints stated on the service
Fields	parcel number (PARID, GEOPIN)
Not published	owner names, deed references, plat references
REST endpoint	`https://maps.nola.gov/server/rest/services/Assessor/Parcels_To_Join/MapServer/0`
Last verified	2026-10-20 with a live point and parcel-number query

MapServer layer whose only attributes are GEOPIN and PARID ('Parcel geometry that contains GEOPIN and PARID to allow for tabular joins'). PARID is the Assessor's address-style parcel key, house number plus squeezed street name, e.g. '6124-MILNEBL', '1725B-STANDREWST' ('29208-SQUARE' for whole-square government parcels), so it doubles as a rough situs; GEOPIN is the 8-digit GIS parcel number as an integer (41200970). No owner, situs or legal fields. The richer layer at gis.nola.gov/arcgis/rest/services/LGIM/TaxParcelQuery/MapServer/0 (owner, situs, 9-digit TAXBILLID) answers fine in a browser or curl but gis.nola.gov does not send its intermediate TLS certificate, so Python requests fails with CERTIFICATE_VERIFY_FAILED; it was therefore not used. Assessor/Landbase_Layers/MapServer/0 on this host has GEOPIN plus situs parts (SITUS_NUMBER, SITUS_STREET, SITUS_TYPE) if an address is needed.

St. Tammany County

Layer	St. Tammany Parish 2025 Parcels
Publisher	St. Tammany Parish Government GIS Division, from St. Tammany Parish Assessor's Office data
Coverage	All of St. Tammany Parish
Data vintage	2025 Assessor roll, delivered annually (service last updated 10/21/2025)
Terms	Public records, no token; (c)2025 St. Tammany Parish Assessor's Office and Parish Government; standard no-warranty disclaimer, for general mapping and planning
Fields	parcel number (REID, Assessment_Num, LegacyID); site address (Physical_Address1); owner (Owner_Name); legal description
Not published	deed references, plat references
REST endpoint	`https://maps.stpgov.org/server/rest/services/Referenced_Layers/2025_Parcels/MapServer/0`
Last verified	2026-10-20 with a live point and parcel-number query

MapServer layer. The parish publishes one service per tax year (Referenced_Layers/2024_Parcels, 2025_Parcels); when a 2026_Parcels service appears, update the url. REID is the assessment number as a string, e.g. '55236'; Assessment_Num is the same value as an integer; LegacyID is the older 10-digit parcel id ('1128133223'). Physical_Address1 has no city or zip. Owner_Name can contain double spaces. Lot_No, Block_No and Subd_Phase are present; no deed or plat book fields.

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.

Basesheet uses this to draw the parcel line on a base plan for any Louisiana address, with LiDAR contours, soils, flood zones and wetlands.

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