Union County Assessor

Find Union County New Jersey assessor, assessment, auditor's, and appraiser's office, revenue commissions, GIS, and tax equalization departments. Assessors provide information on property and land tax assessment, property listings, values, valuations, property search, and records.


Elizabeth Assessor 50 Winfield Scott Plaza Elizabeth NJ 07201 908-820-4136


Fanwood Assessor 75 North Martine Avenue Fanwood NJ 07023 908-322-8236

Hillside Assessor 1409 Liberty Avenue Hillside NJ 07205 973-926-2222

Kenilworth Assessor 567 Boulevard Kenilworth NJ 07033 908-276-5801

Plainfield City Assessor 515 Watchung Avenue Plainfield NJ 07060 908-753-3203

Roselle Assessor 210 Chestnut Street Roselle NJ 07203 908-241-4000

Springfield Assessor 100 Mountain Avenue Springfield NJ 07081 973-912-2207

Westfield Town Assessor 425 East Broad Street Westfield NJ 07090 908-789-4055

What is an Assessor?

An assessor determines the values of properties in a local jurisdiction, such as a county or state. This assessment is then used to determine the taxable value of each property and the corresponding property tax amount. An assessor works with an auditor's office or local revenue commission to determine real estate and property value increases and decreases. The department may work with an appraiser's office on new construction projects to produce property and land tax assessments.

Assessors use a variety of GIS maps and tax equalization tools to determine valuations within their specific boundaries. The assessor determines which properties are exempt from property taxes and ensures that taxpayers aren't overburdened, as well as ensuring that properties aren't undervalued or overvalued. Assessors may provide valuable information for related property searches.