Portsmouth, NH Property Tax Rate: What Owners Pay

A Single-Layer Tax City, Not a Village-District Town

Portsmouth is worth naming carefully here: it is a city, incorporated as one in 1849 after nearly two centuries as a town, and it remains the only city in Rockingham County despite being only the county's fourth-largest municipality by population. That matters for tax purposes because Portsmouth has no equivalent to Hampton Beach's separate Village District, a precinct created in 1907 under state law that bills its own budget on top of Hampton's town-wide rate. Portsmouth's roughly 16.8 square miles carry one municipal rate, full stop, whether the parcel is a downtown rowhouse near Market Square, a condo along the South End waterfront, or a single-family home well away from the Piscataqua River.

That simplicity is a genuine practical advantage for anyone comparing ownership costs across the Seacoast. There is no second precinct budget to track down and no separate district tax bill to reconcile against the city's own rate. The City of Portsmouth's own Assessing Office and tax collector records tell the whole story for any single parcel in the city.

Portsmouth's FY2026 Rate: $11.51 per $1,000, and the Revaluation Behind It

Per the City of Portsmouth's own press release, the FY2026 tax rate was set at $11.51 per $1,000 of assessed value, announced December 18, 2025. City officials attributed the figure, which came in six cents lower than the FY26 adopted budget's own estimate, to roughly $200 million in new development strengthening the city's overall tax base, resulting in a 41% reduction from the originally projected tax increase. That rate is up modestly from the $11.18 per $1,000 figure reported for Portsmouth in 2025 by the Madden Group's Seacoast tax-rate guide.

The more important story behind the number is Portsmouth's 2024 property revaluation, its first comprehensive citywide reassessment in five years. Per a direct fetch of an NH Business Review article, that revaluation found the city-wide median home value jumping from $482,000 at the start of 2024 to $762,600 by September 2024, which City Assessor Rosann Lentz attributed to a roughly 60.7% overall increase in single-family home values during the revaluation period. This is the reason a Portsmouth rate reading only modestly higher than 2025 can still translate into a much larger actual tax bill for an individual owner: when a town or city revalues, a flat or even declining rate per $1,000 can still sit on top of a dramatically larger assessed value, and the two numbers have to be read together, not separately.

What $11.51 per $1,000 Actually Costs, in Dollars

Two different current home-value figures exist for Portsmouth, and running the $11.51 rate against each gives a useful range rather than one falsely precise number. Zillow's Home Value Index puts Portsmouth's typical home value at $804,373 as of a May 31, 2026 snapshot, up 3.7% year-over-year, with a median list price of $762,633 across 71 active listings; at $11.51 per $1,000, that works out to roughly $9,258 per year in city tax. Redfin's figure, drawn from actual closed sales rather than an index estimate, put Portsmouth's median sale price at $955,000 as of a November 2025 data pull, up a striking 18.2% year-over-year, with a median 38.5 days on market; at the same rate, that works out to roughly $10,992 per year.

Both of those are illustrative multiplications, not real tax bills. A city's own assessed value for a specific parcel, set during the 2024 revaluation and updated afterward, is not the same thing as a Zillow index estimate or a Redfin closed-sale median for the city as a whole. The only reliable number for a specific address is the actual assessed value on that parcel's current tax card from the City of Portsmouth's own Assessing Office, multiplied by the confirmed current-year rate.

How Portsmouth Compares to Its Seacoast Neighbors

Set against other Rockingham County Seacoast communities, per the Madden Group's 2025 figures (all per $1,000 of assessed value): New Castle $5.39, the lowest in the region, Rye $8.66, Portsmouth $11.18 (now $11.51 for FY2026 per the city's own more current figure), Hampton $12.32, North Hampton $12.80, Exeter $17.79, and Brentwood $25.17, the highest cited. Portsmouth sits roughly in the middle of that lineup, meaningfully higher than beach towns like Rye and New Castle despite having a smaller homeownership rate than either: DataUSA puts Portsmouth's homeownership rate at just 51.9%, well below the 65.2% national average, reflecting the city's genuine small-city housing mix of renters and multi-unit buildings rather than Rye's or New Castle's more single-family, estate-style stock.

Portsmouth's median household income is reported at roughly $100,000 to $106,000 depending on source and vintage, a figure that sits below Rye's roughly $138,000 to $141,000 range but comfortably above Hampton's. The pattern across the whole Seacoast lineup is the same one New Hampshire's town-based tax system always produces: towns and cities with a smaller, denser, more urban tax base per resident, like Portsmouth, tend to carry a higher nominal rate than lower-density towns with a larger assessed value sitting behind each individual parcel.

No State Income Tax, No State Sales Tax: The Rest of the Picture

New Hampshire has no state income tax on wages and salaries and no general state sales tax. There is no offsetting state levy to weigh against the property tax rate the way a buyer moving from Massachusetts or another income-tax state might expect. In New Hampshire, the property tax is essentially the entire state and local tax picture for a homeowner, which is part of why nominal city and town rates in this state read high relative to states that spread the tax load across multiple categories, and why Portsmouth's $11.51 figure needs to be read in the context of a full, revalued assessed value rather than compared on its own against a lower-rate, lower-density neighbor like Rye or New Castle.

What This Page Could Not Confirm

A few things should be checked directly rather than assumed from this page. The $11.51 per $1,000 FY2026 figure came from the City of Portsmouth's own December 18, 2025 press release, a solid primary source, but the comparison rates for New Castle, Rye, Hampton, North Hampton, Exeter, and Brentwood are still the Madden Group's 2025 figures rather than confirmed FY2026 numbers for those communities, so the regional ranking above should be treated as directionally accurate rather than a precise current-year lineup. Second, this page did not find a confirmed date for Portsmouth's next scheduled citywide revaluation after the 2024 cycle; New Hampshire municipalities typically revalue on a multi-year cycle, and a buyer should ask the city's Assessing Office directly when the next one is expected, since another revaluation could meaningfully move an individual parcel's assessed value again. Third, no dedicated, sourced figure was found in this pass for how much of a premium, if any, downtown historic-district or waterfront parcels carry over parcels elsewhere in the city; Redfin maintains separate neighborhood pages for Portsmouth Downtown, Islington Street, and Atlantic Heights that likely show real variation, but specific comparative dollar figures were not pulled from them here. None of these gaps should be filled with an assumed number. Verify each directly with the City of Portsmouth's Assessing Office, the New Hampshire Department of Revenue Administration, or Redfin, and consult a New Hampshire-licensed tax professional or real estate attorney before making a purchase decision based on property tax exposure.