New Castle, NH
Rockingham County43.0664°N, 70.7199°W
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.
614
Properties Tracked
1971
Median Year Built
$1.4M
Median Assessed Value
8%
FEMA Flood Zone
163,872
NEP Data Facts Tracked
100%
Coastal Zone
Click any parcel to view intelligence
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.
X
565
AE
40
VE
9
Fire Protection Grades
Fire protection grades reflect proximity to fire stations and hydrant infrastructure. Grade affects insurance pricing in every New England state.
Grade A
196
Grade B
263
Grade C
145
Grade D
10
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.
144
SLR 1 ft
Properties affected
174
SLR 3 ft
Properties affected
251
SLR 6 ft
Properties affected
153
Surge Exposure
Cat 1/2/3/4
222
Estuary
Waterfront
20
Pond
Waterfront
17
Marine
Waterfront
Zone 1
Radon Risk
112 mph
Design Wind Speed
ASCE 7 standard
50 psf
Ground Snow Load
ASCE 7 standard
Very Low
FEMA Risk Index
NRI composite rating
The Property Landscape
614 properties · Median year built 1971 · Avg 3,135 sf
Property Types
Single Family
451
Institutional
36
Vacant Land
31
Condominium
30
Multi-Family
27
Other
16
Residential Other
16
Commercial
6
Mixed Use
1
Construction by Era
Pre-1800
55
1800-1849
22
1850-1899
29
1900-1949
77
1950-1979
94
1980-1999
150
2000+
98
Architectural Styles
Cape Cod
127
Colonial
101
Contemporary
88
Ranch
31
Gambrel
11
Condominium
10
Commercial
4
Victorian
3
Living in New Castle
Rockingham County · New Hampshire
Zip Codes03854
1,000
Population
2020 Census
614
Properties
$1.4M
Median Assessed
16%
Owner-Occupied
0.8
Square Miles
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.
Newburyport, MA · Federalist · 3,524 sq ft · 4 bed / 3 bath · Built 1800 · Historic District
NEP Property Intelligence Summary
ConditionC1Fire ClassBFlood ZoneXOwnerIndividualOccupancyOwner-Occupied
Purchased2018 (8yr)Permits11 totalSystems3 updatedLiensClearAssessed$1.6MOcean0.3 mi
EraPre-1940HistoricDesignatedRenovationRecentRadonZone 1
Cite this data
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.