New Hampshire Property Tax Assessors

Sullivan County, New Hampshire Tax Assessors' Office

Where is the Sullivan County Tax Assessor's Office?

While many counties have county-wide tax assessors, Sullivan County has ten cities and towns with their own local tax assessors. If your property is located within any of these localities, see that page for your tax assessor's contact information.

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 (or your town or city assessor's office) 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 $176,337.00 and $187,263.00. 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 Courthouse in Newport, which is located at 14 Main St. 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 Courthouse Address

County Courthouse
14 Main St
Newport, NH 03773-1548