Union City parcel data

Parcel records for Union City, California: owners, assessed values, sales and boundaries.
Parcels
18,618
Last updated
Sep 11, 2026
Zoning
Not yet
County
Alameda County

What each Union City parcel record includes

  • Parcel number and boundary
  • Owners of record and mailing address
  • Assessed and market value
  • Most recent sale: price, date and deed
  • Lot size, land use and property class
  • Building: year built, area and units
  • Legal description
  • Zoning district
Example parcel · Union City2.14 ac
Parcel number0651-45-8213
Owner of recordExample Holdings LLC
Market value 2026$486,300
Last sale$412,000 · 2021
Land useSingle family
Year built1998

Get Union City parcels through the API

Search by address, owner, lot size, value or sale date.

Get an API keyRead the API docs 
curl -G 'https://api.placestack.com/v1/parcel' \
  -H "Authorization: Bearer $PLACESTACK_API_KEY" \
  --data-urlencode 'jurisdiction=jur_01m3n2c1nreyfacrz5kah42pzj'

Frequently asked questions

How many parcels are in Union City?
Placestack has 18,618 parcel records for Union City, California.
What does a Union City parcel record include?
The parcel number and boundary, owners of record and their mailing address, assessed and market value, the most recent sale, lot size, land use, the main building and the legal description.
Is Union City zoning available?
Not yet for Union City. Parcel records are available now.
How do I get Union City parcel data?
Through the API, the MCP server or the map in the console.

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