Town of Grantham, New Hampshire Tax Assessors' Office

Where is the Town of Grantham Tax Assessor's Office?

Town of Grantham is a locality in Sullivan County, New Hampshire. Unlike many other areas where property taxes are collected on a county level, Town of Grantham has its own tax assessor's office. If your property is located in a different Sullivan County locality, see that page for tax assessor's information.

What can the Town of Grantham Assessor's Office do for me?

The Town of Grantham 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 Town of Grantham.

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 Town of Grantham 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 Town of Grantham Assessor's Office at (603) 863 6021 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.

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

603-863-2560

Sullivan County Fax Number

603-863-9314

Sullivan County County Courthouse Address

County Courthouse
14 Main St
Newport, NH 03773-1548

Useful Sullivan County Links:

• Town of Lempster - Property Tax Search
• Town of Grantham Search by address, owner name, or Parcel ID
• Town of Grantham GIS Maps
• Town of Sunapee - Tax Maps
• Town of Plainfield - Tax Maps
• City of Claremont - Property Tax Search
• Town of Grantham Assessors' Office Homepage
• Town of Grantham Search by owner name, address, or Parcel ID
• Town of Grantham - Property Tax Search
• Town of Newport - Property Tax Search
• Town of Charlestown - Property Tax Search
• Town of Grantham Government Homepage