As the new year begins, many New Hampshire property owners are taking a closer look at their finances. One important item that often deserves renewed attention is your property tax bill. If you believe your property has been over-assessed, New Hampshire law provides an annual opportunity to request a reduction through a tax abatement petition.

How Property Taxes Are Calculated

Property taxes in New Hampshire are calculated using a simple formula: the assessed fair market value (FMV) of your property multiplied by the municipal tax rate. Because tax rates are uniform within each municipality, the assessed value of your property is the key factor in determining whether your tax bill is fair.

Fair market value should reflect what a willing buyer would pay a willing seller under normal market conditions. Accurate assessments take into account factors such as property type, lot size, neighborhood, zoning restrictions, age and condition of the structure, and recent comparable sales. However, most municipalities rely on mass appraisal techniques and standardized formulas to assess thousands of properties at once. While efficient, this approach does not allow for individual property analysis and can result in over-assessments or factual errors.

The Tax Abatement Process and Timeline

If you believe your property’s assessed value is too high, you may file a tax abatement petition with your municipality. For the 2025 tax year, abatement applications must be filed no later than March 1, 2026. Fair market value is determined as of April 1, 2025, even though many towns issue tax bills later in the year or on a biannual schedule.

Municipal assessing authorities have until July 1 to act on abatement requests. If your application is denied or not acted upon, you may appeal to the New Hampshire Superior Court or the New Hampshire Board of Tax and Land Appeals, generally by September 1.

How Wescott Law Can Help

Challenging an assessment can be difficult without strong evidence of fair market value. At Wescott Law, our attorneys are experienced in New Hampshire tax abatement matters and can help gather comparable sales data, retain qualified appraisers, negotiate with municipal assessors, and manage appeals if necessary.

If your property tax bill seems higher than it should be, you don’t have to navigate the abatement process alone. Contact us to schedule a consultation and learn how we can assist.