# Union County, NJ property data

> Union County, NJ parcel data: 149,402 parcels with tax assessor records, building permits, historic designations, building codes, via API, MCP server and vector tiles.

Source: https://www.parceled.ai/coverage/new-jersey/union-county  
Publisher: Parceled (https://www.parceled.ai)  
Updated: 2026-10-30

Parceled covers 149,402 parcels in Union County, NJ, with tax assessor records, building permits, historic designations, building codes and hail history available through one API and MCP server. Tax assessor attributes are present for 90% of parcels (owner names on 0% of those records, year built on 100%).

- **Parcels:** 149,402
- **County FIPS:** 34039
- **Snapshot:** October 30, 2026

## What property data is available for Union County?

| Dataset | Union County |
| --- | --- |
| Parcel boundaries | 149,402 parcels |
| Tax assessor records | 134,346 records (90% of parcels) |
| Owner name and mailing address | 0% of assessor records |
| Market or assessed value | 0% of assessor records |
| Year built | 100% of assessor records |
| Last sale date | 103% of assessor records |
| Building permits | 125,820 permits since 1990, latest July 6, 2026 |
| Roofing permits | Not yet |
| Zoning | Not yet |
| Buildable-area screens | Yes |
| Historic designations | 71 |
| Adopted building codes | 1 jurisdiction |
| Hail history (radar) | Yes, every county in the contiguous US |

## How do I query Union County property data?

Bulk-search every parcel in the county with `search_properties` using `state: "NJ"` and `county: "039"` (the county FIPS code 34039), or look up one address with `search_parcels`. Check any single property for free with `check_availability`.

```json
{
  "name": "count_properties",
  "arguments": { "state": "NJ", "county": "039" }
}
```

## Frequently asked questions

### How do I find who owns a property in Union County?

Search the address on the Union County assessor's website, or query Parceled's `search_parcels` for owner name and mailing address. See [how to find a property owner by address](https://www.parceled.ai/guides/how-to-find-property-owner-by-address).