Sullivan County, New HampshireProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Assessment appeal
- For 2026 municipal property-tax notices, an RSA 76:16 abatement application is due March 1, 2027; an appeal of a denial to the New Hampshire Board of Tax and Land Appeals is due September 1, 2027.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
Local municipal PA-29 property-tax credit/exemption applications generally use the April 15, 2026 deadline; the statewide 2026 DP-8 Low and Moderate Income Homeowners Property Tax Relief claim period is May 1–June 30, 2026.
Senior relief
New Hampshire elderly and disabled property-tax exemptions/deferrals are local and vary by municipality; PA-30 is the statewide elderly/disabled tax-deferral form. The 2026 Low and Moderate Income Homeowners Property Tax Relief program accepts claims May 1–June 30, 2026, for eligible homeowners with income up to $37,000 single or $47,000 married/head of household and a maximum qualifying homestead value of $220,000.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.