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Area data

Castine, ME — ZIP 04421

Population: 1,362 (Census ACS)

The median home value in ZIP 04421 (Castine, ME) is $603,500. 1 schools serve the area (NCES). FEMA's National Risk Index rates the county's overall natural-hazard risk Relatively Low, with icestorm, winterweather, coastalflooding the top-rated hazards. Cost of living is 3.0% below the US average (BEA, metro/state-level).

Backed by 25+ public sourcesFEMA · U.S. Census · NOAA · Dept. of Education · EPA · and more

$603,500

Median home value

Relatively Low

Hazard risk (county)

Home values & appreciation

Median home value
$603,500
House Price Index (state)
486.3 (+4.0% YoY)

Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)

Market activity

For-sale inventory
5

Source: recent area sales and market data (ZIP-level)

Affordability

Cost of living index (Average)
97.0 (100 = US avg)
Electricity rate (state-level)
27.8¢/kWh
Natural gas rate (state-level)
$19.00/MCF
30-year mortgage rate (national)
6.66%
15-year mortgage rate (national)
6.00%

Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)

Schools

Total schools
1
Elementary schools
1
Middle schools
0
High schools
0
Schools include
Adams School

Source: NCES school directory, 2022-23 (school-address-based)

Natural hazards & flood risk

Overall hazard risk (county)
Relatively Low
Top hazards (county)
iceStorm, winterWeather, coastalFlooding, coldWave, hurricane
Notable hazard ratings (county)
coastalFlooding: Relatively Moderate · coldWave: Relatively Moderate · drought: Relatively Low · hurricane: Relatively Moderate · iceStorm: Relatively High · inlandFlooding: Relatively Low
Wildfire risk to homes (county)
Higher than 12% of US counties
Buildings in wildfire direct-exposure zone
83.1%
Radon potential (county)
High radon potential — EPA Zone 1 of 3
EPA Superfund (NPL) sites within 5 mi
1
Nearest Superfund site
Callahan Mine (4.5 mi)
EPA recommends radon testing for every home regardless of zone.

Sources: FEMA National Risk Index (county-level) · FEMA flood data (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL

Climate (30-year normals)

Average annual temperature
46.0°F
Average high
55.0°F
Average low
38.0°F
Annual precipitation
60.8 in
Annual snowfall
74.0 in
USDA plant hardiness zone
5b (extreme annual low -15 to -10°F)

Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)

Air quality

Air quality rating
Good
Median AQI (annual)
37
Days with Good air quality
334
Days with Moderate air quality
31
Highest AQI recorded (year)
105

Source: EPA air quality data (nearest monitoring station, annual)

Amenities

National parks within ~60 mi
2
Nearest national park
Acadia National Park (27 mi)
National parks include
Acadia National Park, Frances Perkins National Monument
Airports within 30 mi
18
Nearest airport
Islesboro Airport (10 mi)
Nearest major airport
Hancock County-Bar Harbor Airport (BHB) (21 mi)
Hospitals nearby (~15 mi)
11
Hospitals include
ST JOSEPH HOSPITAL, NORTHERN LIGHT EASTERN MAINE MEDICAL CENTER, DOROTHEA DIX PSYCHIATRIC CENTER
Avg hospital rating (CMS)
2.8 / 5
Best hospital rating nearby (CMS)
4.0 / 5
EV charging stations (within 10 mi)
8
Solar radiation rating
Fair (3.7 kWh/m²/day)

Sources: National Park Service · FAA airport data · CMS hospital data · DOE/NREL (proximity-based)

Housing stock

Median year housing built
1,974
Housing built before 1970
45.6%
Housing built 2000 or later
19.0%
Median annual property tax
$4,250
Households with broadband internet
88.4%

Source: Census ACS 5-year estimates (ZIP-level)

Employment & development

Total county employment
19,995
Average weekly wage
$995
Top industries (by employment)
Accommodation & Food, Health Care, Professional Services
Annual residential building permits (county)
201

Sources: BLS QCEW (county-level) · Census Building Permits (county-level)

Area data compiled from public government, academic, and industry research feeds. Data sources →

Common questions

What is the median home value in ZIP 04421?
$603,500.
What is the natural-hazard risk in ZIP 04421?
Overall risk: Relatively Low (FEMA NRI, county-level). Top hazards: iceStorm, winterWeather, coastalFlooding, coldWave, hurricane.
What is the wildfire risk in ZIP 04421?
Risk to homes is higher than 12% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
What is the radon potential in ZIP 04421?
High radon potential — EPA Zone 1 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near ZIP 04421?
1 current or proposed National Priorities List site within 5 miles (EPA). Nearest site: Callahan Mine, 4.5 mi.
How many schools serve ZIP 04421?
1 schools (1 elementary) (NCES, 2022-23).
What is the air quality in ZIP 04421?
Good. Median AQI: 37. (EPA AQI).
What is the cost of living in ZIP 04421?
Regional Price Parity: 97.0 (100 = US average) (Average) (BEA RPP, metro/state-level).

Nearby ZIP codes

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Data last updated

Most recent source refresh: Sep 2026. See all data sources →

Data compiled by REAIGENT7 — AI listing platform for real estate agents