Go to Portsmouth's Property Lookup
Enter your Assessed Property Value in dollars to estimate your taxes for the year.
Go to Property Tax Calculator
If you move or change your mailing address, please complete and submit this form to the Assessor's Office either In Person, through Email, over Fax, or through the Mail as soon as possible in order to ensure your records are accurate.
Download application here
This application is for Taxpayers who wish to apply for an Abatement from Municipal Property Taxes. The Taxpayer must file the abatement application with the municipality by March 1 following the notice of tax. This application does not stay the collection of taxes; taxes should be paid as assessed. If an abatement is granted, a refund with interest will be made.
Click Here to view the PDF
Understanding NH Property Taxes manual
NH Equalization Manual
Code of Ethics
How your property is appraised
State of NH FAQ link
NH Dept of Revenue