Warren County, New Jersey Tax Assessors' Office
202 Mansfield Street
Belvidere, New Jersey 07823
Where is the Warren County Tax Assessor's Office?
What can the Warren County Assessor's Office do for me?
The Warren County Tax Assessor's Office oversees the appraisal and assessment of properties as well as the billing and collection of property taxes for all taxable real estate located in Warren County.
Contact the assessor's office if you need help with paying your property taxes, applying for a homestead exemption or other tax exemption, reporting upgrades to your home, appealing your property tax assessment, or verifying your property records.
Submitting a Warren County property tax appeal
If you believe that your house has been unfairly overappraised (i.e. appraised at a value higher than the true market value of the property), you can attempt to get your home re-appraised at a lower value by contacting the Assessor's Office to submit a property tax appeal.
You will have to submit a form describing your property and sufficient proof that it is overassessed, including valuations of similar homes nearby as evidence. If your appeal is accepted, your home assessment (and property taxes) will be lowered as a result.
If you would like to appeal your property, call the Warren County Assessor's Office at (908) 475 6070 and ask for a property tax appeal form. Keep in mind that property tax appeals are generally only accepted in a 1-3 month window each year.
For more information and example appeals, see how to appeal your property taxes.
Useful Warren County Facts:
The median home value in Warren County is between $302,948.00 and $311,652.00. Property tax rates are based on property values.
How can I contact Warren County?
You can try contacting the Warren County local government directly with any issues the Assessor's Office can't solve. In many counties, certain property records such as deeds are kept in the county courthouse or county archives instead of at the tax assessors' office.
The county seat for Warren County is located in the County Administration Building in Belvidere, which is located at 165 County Road 519. You can direct your general inquiries to Warren County with the contact info listed below.
Warren County Phone Number
Warren County Fax Number
Warren County County Administration Building Address
County Administration Building
165 County Road 519
Belvidere, NJ 07823-1949