Public ArcGIS MapServer endpoint for Maricopa County parcel data. URL, supported fields, and a working sample query, copy it, or open it directly in the UrbanKit parcel lookup tool.
Beyond the parcel record, Maricopa County has a free Phoenix property report: code violations and building permits for an address, read straight from the city's open data.
Free Phoenix property report: code violations + building permits →https://gis.mcassessor.maricopa.gov/arcgis/rest/services/MaricopaDynamicQueryService/MapServer/3APNAssessor Parcel Number (APN)APN_DASHAPN with dashesOWNER_NAMEOwner NameMAIL_ADDR1Mailing Address 1MAIL_ADDR2Mailing Address 2PHYSICAL_ADDRESSPhysical Address (combined)curl -s 'https://gis.mcassessor.maricopa.gov/arcgis/rest/services/MaricopaDynamicQueryService/MapServer/3/query?where=UPPER(OWNER_NAME)%20LIKE%20UPPER('%25SMITH%25')&outFields=APN,OWNER_NAME,PHYSICAL_ADDRESS,PHYSICAL_CITY&returnGeometry=false&f=json&resultRecordCount=10'https://gis.mcassessor.maricopa.gov/arcgis/rest/services/MaricopaDynamicQueryService/MapServer/3/query?where=UPPER(OWNER_NAME) LIKE UPPER('%SMITH%')&outFields=APN,OWNER_NAME,PHYSICAL_ADDRESS,PHYSICAL_CITY&returnGeometry=false&f=json&resultRecordCount=10Open this URL in a browser tab to see the raw ArcGIS JSON response.
| Field name | Label | Searchable |
|---|---|---|
| APN | Assessor Parcel Number (APN) | YES |
| APN_DASH | APN with dashes | YES |
| OWNER_NAME | Owner Name | YES |
| MAIL_ADDR1 | Mailing Address 1 | YES |
| MAIL_ADDR2 | Mailing Address 2 | YES |
| MAIL_CITY | Mailing City | NO |
| MAIL_STATE | Mailing State | NO |
| PHYSICAL_ADDRESS | Physical Address (combined) | YES |
| PHYSICAL_CITY | Physical City | NO |
| SALE_DATE | Sale Date | NO |
| SALE_PRICE | Sale Price | NO |
| FCV_CUR | Full Cash Value (current year) | NO |
| LPV_CUR | Limited Property Value (current) | NO |
57 fields confirmed including APN, APN_DASH, BOOK, MAP, ITEM, FLOOR, OWNER_NAME, MAIL_ADDR1/2, MAIL_CITY, MAIL_STATE, MAIL_ZIP, MAIL_CNTRY, PHYSICAL_ADDRESS, PHYSICAL_CITY, PHYSICAL_ZIP, PHYSICAL_STREET_NUM/DIR/NAME/TYPE, DEED_NUMBER, DEED_DATE, SALE_DATE, SALE_PRICE, MCRNUM, SUBNAME, LAND_SIZE, LOT_NUM, CONST_YEAR, LIVING_SPACE, INCAREOF, FCV_CUR/PREV, LPV_CUR/PREV, TAX_YR_CUR/PREV, CITY_ZONING, JURISDICTION, BLOCK, TRACT. Owner query tested and confirmed. The MaricopaDynamicQueryService layer 3 (Parcels) is the full-attribute layer backing the Parcel Viewer at maps.mcassessor.maricopa.gov. A separate 'Parcels' MapServer at gis.mcassessor.maricopa.gov/arcgis/rest/services/Parcels/MapServer also exists but has fewer fields. APN format: 8-digit with no dashes (e.g. '10101347'); APN_DASH adds dashes (e.g. '101-01-347').
Maricopa County Assessor's Office, GIS Division, https://maps.mcassessor.maricopa.gov/
Maricopa County's Parcels layer exposes parcel identifiers (Assessor Parcel Number (APN), APN with dashes), owner names (Owner Name), and address fields (Mailing Address 1, Mailing Address 2, Physical Address (combined)). Use it for owner-name lookups and address-based parcel searches. 6 of 13 listed fields accept queries; the rest are returned on read but not indexed for search. Served as an ArcGIS MapServer layer, which supports query operations but not write operations; last verified 2026-05-11.
/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 Maricopa County actually publishes, not what you might expect from a national standard (there isn't one).
For background, see What is an APN?
gis.mcassessor.maricopa.gov serves Maricopa County, Arizona parcels over public ArcGIS REST, but, like most county servers, it may not send the CORS headers a browser needs for a cross-origin fetch. If a direct browser call fails, the layer still works from curl, Postman, or a server-side script; the UrbanKit parcel lookup tool proxies the request, so a search that succeeds there confirms the layer is genuinely public.
We last verified Maricopa County's MapServer layer on 2026-05-11. County GIS teams move services without notice, so if you hit a fresh 404, tell us and we'll re-check. Atlas entries are re-verified on a rolling basis.
Maricopa County's layer is hosted by the county on gis.mcassessor.maricopa.gov. Public ArcGIS endpoints rarely rate-limit individual reads, but gis.mcassessor.maricopa.gov can throttle heavy automated traffic at the host level. Page through results with resultOffset / resultRecordCount and request only the fields you need. There's no API key and no charge from the county.