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Area data

Erwinna, PA — ZIP 18920

Population: 393 (Census ACS)

The median home value in ZIP 18920 (Erwinna, PA) is $740,949 — up 7.4% over the past year. Homes sell for a median $780,600 after a median 85 days on market. FEMA's National Risk Index rates the county's overall natural-hazard risk Relatively High, with icestorm, winterweather, coldwave the top-rated hazards. Cost of living is 2.5% below the US average (BEA, metro/state-level).

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

$740,949

Median home value

+7.4%

1-year change

85

Median days on market

Relatively High

Hazard risk (county)

Home values & appreciation

Median home value
$740,949
1-year appreciation
+7.4%
3-year appreciation
+15.6%
5-year appreciation
+26.7%
10-year appreciation
+75.5%
All-time peak (2026-07)
$740,949
House Price Index (state)
370.8 (+4.0% YoY)

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

Market activity

Median sale price
$780,600
Median list price
$995,000
Median price per sqft
$498
Median days on market
85 days
Homes sold (recent period)
1
For-sale inventory
5
Sale-to-list ratio
98.2%
Active listings
5
1-year forecast
+2.9%

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

Rents

Studio fair-market rent
$1,540/mo
1BR fair-market rent
$1,670/mo
2BR fair-market rent
$1,990/mo
3BR fair-market rent
$2,390/mo
4BR fair-market rent
$2,670/mo

Sources: market rent index (ZIP-level) · HUD Fair Market Rents (metro/county-level, 40th-percentile regulatory reference)

Affordability

Cost of living index (Average)
97.5 (100 = US avg)
Electricity rate (state-level)
19.3¢/kWh
Natural gas rate (state-level)
$15.00/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)

Natural hazards & flood risk

Overall hazard risk (county)
Relatively High
Top hazards (county)
iceStorm, winterWeather, coldWave, inlandFlooding, lightning
Notable hazard ratings (county)
coastalFlooding: Relatively Moderate · coldWave: Relatively High · drought: Relatively Moderate · earthquake: Relatively Moderate · hail: Relatively Low · heatWave: Relatively Moderate
FEMA flood zone
AE
Flood risk level
High
Wildfire risk to homes (county)
Higher than 17% of US counties
Buildings in wildfire direct-exposure zone
50.1%
Radon potential (county)
High radon potential — EPA Zone 1 of 3
EPA Superfund (NPL) sites within 5 mi
4
Nearest Superfund site
De Rewal Chemical Co. (1.7 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)

Annual precipitation
52.1 in
USDA plant hardiness zone
7a (extreme annual low 0 to 5°F)

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

Air quality

Air quality rating
Good
Median AQI (annual)
39
Days with Good air quality
241
Days with Moderate air quality
50
Days with Unhealthy air quality
1
Highest AQI recorded (year)
200

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

Walkability & transit

Walkability index
4.5 / 20
Transit service frequency
-99,999
Jobs reachable by car (30 min)
19,305
Jobs reachable by transit (45 min)
22,289

Source: EPA Smart Location Database (metropolitan block groups)

Amenities

National parks within ~60 mi
24
Nearest national park
Lower Delaware National Wild and Scenic River (9 mi)
National parks include
Lower Delaware National Wild and Scenic River, Washington-Rochambeau Revolutionary Route National Historic Trail, Valley Forge National Historical Park
Airports within 30 mi
70
Nearest airport
Erwinna Private Airport (1 mi)
Nearest major airport
Trenton Mercer Airport (TTN) (21 mi)
Hospitals nearby (~15 mi)
10
Hospitals include
HUNTERDON MEDICAL CENTER, ST LUKE'S WARREN HOSPITAL, JEFFERSON LANSDALE HOSPITAL
Avg hospital rating (CMS)
4.1 / 5
Best hospital rating nearby (CMS)
5.0 / 5
Solar radiation rating
Fair (4.0 kWh/m²/day)

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

Migration

Net migration (county)
-967 tax filers

Source: IRS county-to-county migration data (county-level, ~12-month lag)

Housing stock

Median year housing built
1,973
Housing built before 1970
47.4%
Housing built 2000 or later
23.7%
Median annual property tax
$8,281
Households with broadband internet
100.0%

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

Employment & development

Total county employment
246,153
Average weekly wage
$1,196
Top industries (by employment)
Health Care, Accommodation & Food, Construction
Annual residential building permits (county)
483

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

How it compares

ZIP 18920State medianUS median
Median home value$740,949$237,154$289,727
Median sale price$780,600$254,900$325,000
Median days on market85 days43 days51 days
Median annual property tax$8,281$2,326$2,006

State and US medians are computed across all US ZIP codes with sufficient public-data coverage, from the same sources as the figures above.

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

Common questions

What is the median home value in ZIP 18920?
$740,949.
What is the median sale price in ZIP 18920?
$780,600.
How long do homes take to sell in ZIP 18920?
Median days on market: 85 days.
What is typical rent in ZIP 18920?
2-bedroom fair-market rent: $1,990/month (HUD FMR — a 40th-percentile regulatory reference, not market-observed).
What is the natural-hazard risk in ZIP 18920?
Overall risk: Relatively High (FEMA NRI, county-level). Top hazards: iceStorm, winterWeather, coldWave, inlandFlooding, lightning.
Is ZIP 18920 in a flood zone?
High (FEMA NFIP). FEMA flood zone AE.
What is the wildfire risk in ZIP 18920?
Risk to homes is higher than 17% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
What is the radon potential in ZIP 18920?
High radon potential — EPA Zone 1 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near ZIP 18920?
4 current or proposed National Priorities List sites within 5 miles (EPA). Nearest site: De Rewal Chemical Co., 1.7 mi.
Is ZIP 18920 walkable?
Walkability index: 4.5/20 (EPA Smart Location Database).
What is the air quality in ZIP 18920?
Good. Median AQI: 39. (EPA AQI).
What is the cost of living in ZIP 18920?
Regional Price Parity: 97.5 (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