New Castle, NH
Tracking 614 properties across New Castle, New Hampshire — a community where the median home dates to 1971 and the oldest to 1668. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
New Castle, NHInc. 1693
New Castle is the smallest town in New Hampshire by area — a tiny island community at the mouth of Portsmouth Harbor, connected to the mainland by bridges. The town is essentially surrounded by water, with Wentworth-by-the-Sea resort as its most recognized feature. Nearly every property faces some degree of coastal exposure.
For property professionals, New Castle is a very small, high-value coastal market where ocean and harbor exposure is universal and flood zone designations affect most properties.
Risk Profile
FEMA flood zones, fire protection grades, radon, coastal exposure, storm surge — parcel by parcel
FEMA Flood Zones
49 properties (8%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
Fire Protection Grades
Fire protection grades reflect proximity to fire stations and hydrant infrastructure. Grade affects insurance pricing in every New England state.
Coastal & Water Exposure
614 properties (100%) are within 3 miles of the ocean. 286 are classified as waterfront. The closest property is 147 ft from the coastline.
The Property Landscape
614 properties · Median year built 1971 · Avg 3,135 sf
Property Types
Construction by Era
Architectural Styles
Living in New Castle
Rockingham County · New Hampshire
New Castle covers 0.8 square miles in Rockingham County, New Hampshire. The median assessed property value is $1.4M.
Single-family homes account for 451 of New Castle's 614 properties. There are 31 parcels of vacant land. About 16% of properties are owner-occupied, and 10% are owned by someone out of state.
Assessed values range widely — the middle 50% of properties fall between $972K and $2.1M, with the highest assessed property at $81.6M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
47% of properties are on municipal sewer, with the remainder on private septic systems. Electric service is provided by PUBLIC SERVICE CO OF NH.
What New Castle Property Intelligence Means for Professionals
Insurance & Underwriting
With 8% of properties in FEMA flood zones and 100% in the coastal zone, New Castle concentrates several major underwriting variables. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
New Castle's 9 property types, spanning construction from 1668 to present, require local market knowledge for accurate comparable selection and valuation. NEP assembles building characteristics, environmental exposure, and condition signals into a single property profile.
Real estate solutionsLending & Title
Collateral assessment requires flood zone verification, environmental screening, and ownership chain validation. 8% of New Castle properties are in SFHAs where flood insurance is a federal lending requirement. NEP provides property-level compliance data from public records.
Lending solutionsInspection & Property Services
Understanding a property's construction era, environmental exposure, and building characteristics before arriving on site transforms inspection from discovery to verification.
Inspection solutionsExplore New Castle property intelligence.
614 New Castle properties — each with risk profiles, building data, permit history, and ownership analysis from 140+ sources. Open any property and see the full picture.
Source: NE Provenance, “Professional Property Intelligence for New England,” neprovenance.com/insights/town/new-castle-nh. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.