New York Property Tax Assessors

Sullivan County, New York Tax Assessors' Office

Sullivan County Assessors Phone Number
Sullivan County Real Property Tax Services
100 North Street
Monticello, New York 12701
Sullivan County Assessors Fax Number 845-807-0232 (Fax)

Where is the Sullivan County Tax Assessor's Office?

The Sullivan County Tax Assessor & Real Property Tax Services Office is located at 100 North Street, at the County Government Center building in Monticello, New York.

What can the Sullivan County Assessor's Office do for me?

The Sullivan 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 Sullivan 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 Sullivan 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 Sullivan County Assessor's Office at (845) 807 0221 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 Sullivan County Facts:

The median home value in Sullivan County is between $180,567.00 and $193,233.00. Property tax rates are based on property values.

How can I contact Sullivan County?

You can try contacting the Sullivan 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 Sullivan County is located in the County Government Center in Monticello, which is where the Sullivan County Assessors' Office is also located. You can direct your general inquiries to Sullivan County with the contact info listed below.

Sullivan County Phone Number


Sullivan County Fax Number


Sullivan County County Government Center Address

County Government Center
100 North St
Monticello, NY 12701-1163

Useful Sullivan County Links:

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