Seabrook, NH Coastal Insurance Guide

85% to 94% of the Floodplain, Depending on the Scenario

The Rockingham Planning Commission, a regional planning agency covering Seabrook and its neighboring Seacoast towns, ran a hazard-mitigation assessment against three sea-level-rise scenarios for the town: 1.7 feet, 4.0 feet, and 6.3 feet of rise by 2100. At the low end of that range, roughly 85% of Seabrook's existing 100-year floodplain would be affected; at the high end, that figure rises to roughly 94%. That is a strikingly wide swath of the town's already-mapped flood zone, and it is worth reading precisely: this is a planning-level model of how the current floodplain would expand and intensify under future sea-level scenarios, not a current FEMA flood-insurance-rate-map finding for any individual parcel.

At the high-end 6.3-foot scenario, the same assessment puts approximately 882 parcels, valued at roughly $336 million, at flood risk. That is a large number relative to a town of Seabrook's small, 9.70-square-mile size, and it is the strongest single exposure figure this research found for the town. The assessment does not break that parcel count down by FEMA zone letter (VE versus AE) or by individual address, so it should be read as a town-wide planning estimate rather than a substitute for a parcel-specific flood-zone lookup.

Infrastructure and Wetlands Named at Risk

Beyond private parcels, the Rockingham Planning Commission assessment names specific pieces of critical infrastructure it considers at risk under these sea-level-rise scenarios: town sewage pump stations, Seabrook's Elementary-Middle School, the town's wastewater treatment plant, and, notably, the NextEra Energy Seabrook Station nuclear plant site itself. That last item is a factual, sourced planning detail, not a safety claim about the plant: it means the same low-lying, marsh-adjacent geography that puts other town infrastructure at flood risk also touches the land the power plant sits on, since Seabrook Station sits directly across the tidal Blackwater River from the town's residential and beach areas. It is planning-level flood-exposure data, not a finding about the plant's operational safety.

The assessment also puts a number on the natural buffer between the ocean and that infrastructure: between 235.3 and 268.6 acres of tidal salt marsh are projected to be affected across the three scenarios, and the report describes that marsh, along with the town's dunes and beaches, as providing real storm protection today while itself facing sustainability pressure from rising water. Route 1A and Route 286, the two main roads connecting Seabrook Beach to the rest of town and to Route 1, are both named in the assessment as highly susceptible to inundation, a practical detail for anyone weighing access and evacuation routes as well as flood risk to a specific structure.

What Seabrook's Storm History Does Not Confirm

Neighboring Hampton has a well-documented January 2018 nor'easter and National Flood Insurance Program history, and Rye has a documented January 2024 seawall-damage story tied to a federal PROTECT grant. This research did not find a comparable Seabrook-specific historical storm-damage account, with dollar figures or specific event dates, and it will not invent one. Given that Seabrook shares its coastline and the same Hampton-Seabrook Estuary system with Hampton, it is reasonable to assume broadly similar nor'easter and high-tide flooding exposure, but that is an inference, not a confirmed Seabrook-specific record.

The same gap applies to historical hurricanes. This research did not find a well-documented, Seabrook-specific account of damage from the 1938 Great New England Hurricane or any other historical storm. A buyer or agent who wants that history should check NOAA's historical hurricane database and FEMA's own disaster-declaration records directly rather than assume a neighboring town's storm history applies to Seabrook.

FEMA Zones Along This Stretch of Coast

New Hampshire's Atlantic coastline generally carries both FEMA Zone VE, the coastal high-hazard wave-action zone that requires new construction to be elevated on pilings or columns with no enclosed space below the flood elevation, and Zone AE, the standard 100-year floodplain zone that requires the lowest floor at or above base flood elevation but allows a wider range of construction methods. Both zone types apply generally to this stretch of coast, including Seabrook Beach, but this research did not find a Seabrook-specific parcel count or map showing which properties fall in VE versus AE. That level of detail exists only at FEMA's Flood Map Service Center, and it should be checked directly, by address, before anyone assumes a specific zone letter for a specific property.

A Tax Rate Shaped by One Very Large Taxpayer

New Hampshire has no state income tax on wages and no general state sales tax, so property taxes fund nearly all municipal, county, and school costs. A real-estate aggregator's December 2025 update puts Seabrook's 2025 municipal tax rate at $12.40 per $1,000 of assessed value, down from $15.09 per $1,000 in 2023, a change that plausibly reflects a town-wide property revaluation rather than a spending cut, though that specific cause has not been independently confirmed against Seabrook's own Assessing office. For comparison, the same 2025 source puts Hampton at $12.61, Hampton Falls at $14.80, and North Hampton at $13.45, while Rye runs meaningfully lower at $8.37 to $8.66. Seabrook's rate, in other words, sits roughly in line with Hampton's and above Rye's, not uniquely low.

One reason Seabrook's rate is not lower is also its most distinctive fact: the NextEra Energy Seabrook Station nuclear plant, on the town's own tax rolls, contributes roughly 25% to 30% of Seabrook's entire tax levy, per the Town Manager's own account. The town's most recent multi-year tax agreement with NextEra, covering fiscal years 2024 through 2026, totals $45 million over three years, a 12.5% increase over the prior three-year agreement. That is real, meaningful revenue for a town Seabrook's size, but it has not made Seabrook cheap to own property in relative to its Seacoast neighbors, since the town's overall municipal and school costs are also comparatively high for a town its size.

Home Values Behind the Insurance Number

Zillow's home-value index puts Seabrook's typical home value at $669,842, up 2.3% year over year, as of a June 30, 2026 snapshot, with 14 active listings. Census Bureau QuickFacts, using American Community Survey estimates, puts Seabrook's median home value lower, at $443,500, the same pattern this site has documented elsewhere between an assessed-value figure and a current-market index. For comparison, Hampton's Zillow figure runs somewhat higher at $618,203 and Rye's runs far higher at $1,294,369, consistent with Seabrook's lower median household income of $84,349 and 12.1% poverty rate: a more attainable, middle-market coastal New Hampshire price point than Rye, though still a real, substantial one.

This research did not find a reliable, separately sourced oceanfront or Seabrook Beach-specific median price distinct from inland Seabrook. A beachfront premium is reasonable to assume, consistent with every other coastal market this site covers, but no specific dollar or percentage figure for Seabrook was confirmed, and none should be assumed for a specific property without checking current listings directly.

Before You Budget an Insurance Number

This page has not priced a policy for any Seabrook property, and it has not confirmed a parcel-specific FEMA flood zone, a base flood elevation, or a Community Rating System class for any given address. What is confirmed is the Rockingham Planning Commission's finding that 85% to 94% of Seabrook's 100-year floodplain would be affected under modeled sea-level-rise scenarios, that as many as 882 parcels worth $336 million face flood risk at the high end, and that Seabrook's 2025 tax rate of $12.40 per $1,000 sits roughly in line with Hampton's and above Rye's despite a large nuclear-plant tax contribution.

Two concrete next steps will actually answer what this page cannot: look up the specific parcel's flood zone directly through FEMA's Map Service Center at msc.fema.gov, and get a written quote from a New Hampshire-licensed insurance agent who can price that exact address under current flood maps and current underwriting rules. Do not assume a neighboring town's zone framing, tax rate, or a premium quoted elsewhere on this coast applies here without checking. This page is independent research and general information, not insurance, legal, or financial advice; confirm every figure with a licensed New Hampshire insurance agent, and where relevant a financial advisor, before making a purchase decision.