Public ArcGIS MapServer endpoint for Pima County parcel data. URL, supported fields, and a working sample query — copy it, or open it directly in the UrbanKit parcel lookup tool.
https://mapdata.tucsonaz.gov/public/rest/services/PublicMaps/PropertyHousing/MapServer/17/query?where=UPPER(ADDRESSEE) LIKE UPPER('%SMITH%')&outFields=PARCEL,ADDRESSEE,SITE_ADDRESS,SITE_ZIPCITY,TAXYR,FCV,USE_DESC&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| PARCEL | Parcel Number (Pima County APN) | YES |
| ADDRESSEE | Owner / Addressee Name | YES |
| SITE_ADDRESS | Site Address | YES |
| SITE_ZIPCITY | Site City | NO |
| TAXAREA | Tax Area Code | NO |
| FCV | Full Cash Value | NO |
| USE_DESC | Use Description | NO |
| TAXYR | Tax Year | NO |
| YearBuilt | Year Built | NO |
| MAIL1 | Mailing Address Line 1 | YES |
| MAIL2 | Mailing Address Line 2 | YES |
| legal_desc | Legal Description | NO |
75 fields confirmed. The PAREGION layer (layer 17) is the county-wide Pima County Assessor parcel layer, hosted on the City of Tucson mapdata.tucsonaz.gov ArcGIS server, which aggregates both City of Tucson and unincorporated Pima County parcels. Layer 40 (PAREGION_TUCSON) is the Tucson-only subset; use layer 17 for full county coverage. Owner-name field is ADDRESSEE (holds the assessor's addressee/taxpayer name — equivalent to owner name for most records). PARCEL format is alphanumeric (e.g. '101013880'). Also exposes FCV (Full Cash Value), TAXYR, USE_DESC, MAIL1-5 (mailing address), LEGAL1-5 (legal description), SITE_ADDRESS, SITE_ZIPCITY, SITE_ZIP, TAXAREA, GISACRES, CURZONE_OL (zoning), and YearBuilt. The supportsQuery field reads null in layer metadata (ArcGIS 11.3 quirk), but the service capabilities string is 'Map,Query,Data' — queries work as confirmed by live testing. maxRecordCount=2000. The gisweb.pima.gov hostname NXDOMAINs; mapdata.tucsonaz.gov is the correct publicly accessible host.
City of Tucson / Pima County GIS — PropertyHousing MapServer (Pima Assessor PAREGION data) — https://www.pima.gov/1796/Geographic-Information-Systems
/query?where=…&outFields=*&f=jsonto the URL. The sample query above is a working example you can paste into a browser tab to see the raw JSON response.Counties publish parcel data through their own ArcGIS Server installations, each with its own schema. One county uses APN, another uses PIN, a third uses PARCEL_ID. Some expose owner names; others keep them on a separate assessor's portal. The searchable fields list above reflects what this county actually publishes — not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
Many county servers allow public reads but block browser cross-origin requests. The UrbanKit parcel lookup tool fetches directly from your browser; if it works there, the layer is technically public. For your own integration, you may need a same-origin proxy or server-side fetch.
Possibly — counties move services without warning. We re-verify entries weekly and flag stale ones. If you're seeing a fresh 404, please let us know and we'll update the listing.
Most are. Public ArcGIS layers don't typically rate-limit individual reads, but heavy programmatic use can trigger throttling at the host level. Be respectful — query what you need.