Middlesex County Assessor

Find Middlesex 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.


Cranburry Township Assessor 23 North Main Street Cranbury NJ 08512 609-395-0544


Edison Assessor 100 Municipal Boulevard Edison NJ 08817 732-248-7211

New Brunswick Assessor 78 Bayard Street New Brunswick NJ 08901 732-745-5011

Piscataway Township Assessor 455 Hoes Lane Piscataway NJ 08854 732-562-2328

South River Assessor 33 Gordon Street South River NJ 08882 732-257-1209

Spotswood Borough Assessor 77 Summerhill Road Spotswood NJ 08884 732-251-0700

What if I disagree with an assessment?

Most jurisdictions have an appeal process for contesting an assessment. While the specific rules vary from one locality to the next, the process typically involves a hearing before an assessment appeal board. Taxpayers who have concerns about their assessment should visit their local Assessor's Office or its website to learn about the appeal process and what information is required in order to appeal a property tax assessment.

How does my assessment affect the taxes I owe?

The formula used to calculate property taxes varies by location. Your assessment is one part of your property tax calculation. Your property tax payment is calculated by multiplying your property's assessed value, or in some cases half of the assessed value, by the tax rate for your location.

What is the difference between assessed value and market value?

Market value is the likely selling price of a property based on current market conditions. In some jurisdictions, the Assessor calculates an assessed value by applying a factor, for example 70%, to the market value. The assessed value is then used to calculate the taxes for that property.