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Area data

Glen arm, MD — ZIP 21057

Population: 4,386 (Census ACS)

The median home value in ZIP 21057 (Glen arm, MD) is $663,310 — up 2.5% over the past year. Homes sell for a median $740,000 after a median 4 days on market. FEMA's National Risk Index rates the county's overall natural-hazard risk Relatively High, with winterweather, coldwave, heatwave the top-rated hazards. Cost of living is 8.0% above the US average (BEA, metro/state-level).

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

$663,310

Median home value

+2.5%

1-year change

4

Median days on market

Relatively High

Hazard risk (county)

Home values & appreciation

Median home value
$663,310
1-year appreciation
+2.5%
3-year appreciation
+7.7%
5-year appreciation
+18.1%
10-year appreciation
+47.2%
All-time peak (2026-07)
$663,310
House Price Index (state)
367.5 (+0.7% YoY)

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

Market activity

Median sale price
$740,000
Median list price
$569,000
Median price per sqft
$243
1-year sale-price change
-0.7%
Median days on market
4 days
Homes sold (recent period)
13
For-sale inventory
8
Sale-to-list ratio
99.4%
Active listings
4
1-year forecast
+0.4%

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

Rents

Studio fair-market rent
$1,150/mo
1BR fair-market rent
$1,437/mo
2BR fair-market rent
$1,704/mo
3BR fair-market rent
$2,216/mo
4BR fair-market rent
$2,557/mo

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

Affordability

Cost of living index (Above Average)
108.0 (100 = US avg)
Electricity rate (state-level)
19.5¢/kWh
Natural gas rate (state-level)
$16.10/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)
winterWeather, coldWave, heatWave, inlandFlooding, lightning
Notable hazard ratings (county)
coastalFlooding: Relatively Moderate · coldWave: Relatively High · earthquake: Relatively Moderate · hail: Relatively Moderate · heatWave: Relatively High · hurricane: Relatively Moderate
FEMA flood zone
X
Flood risk level
Minimal
Wildfire risk to homes (county)
Higher than 8% of US counties
Buildings in wildfire direct-exposure zone
5.1%
Radon potential (county)
Moderate radon potential — EPA Zone 2 of 3
EPA Superfund (NPL) sites within 5 mi
None
Nearest Superfund site
68th Street Dump (9.7 mi — proposed for listing)
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
79.0°F
Average high
80.0°F
Average low
78.0°F
Annual precipitation
48.3 in
USDA plant hardiness zone
7b (extreme annual low 5 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)
45
Days with Good air quality
228
Days with Moderate air quality
124
Days with Unhealthy air quality
3
Highest AQI recorded (year)
205

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

Walkability & transit

Walkability index
5.7 / 20
Transit service frequency
-99,999
Jobs reachable by car (30 min)
39,098
Jobs reachable by transit (45 min)
38,975

Source: EPA Smart Location Database (metropolitan block groups)

Amenities

National parks within ~60 mi
53
Nearest national park
Hampton National Historic Site (5 mi)
National parks include
Hampton National Historic Site, Star-Spangled Banner National Historic Trail, Fort McHenry National Monument and Historic Shrine
Airports within 30 mi
30
Nearest airport
Albrecht Airstrip (2 mi)
Nearest major airport
Martin State Airport (MTN) (10 mi)
Hospitals nearby (~15 mi)
339
Hospitals include
ST VINCENT'S BIRMINGHAM, MOBILE INFIRMARY MEDICAL CENTER, MEDICAL WEST, AN AFFILIATE OF UAB HEALTH SYSTEM
Avg hospital rating (CMS)
3.0 / 5
Best hospital rating nearby (CMS)
5.0 / 5
Solar radiation rating
Fair (4.1 kWh/m²/day)

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

Migration

Net migration (county)
-2,817 tax filers

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

Housing stock

Median year housing built
1,970
Housing built before 1970
50.2%
Housing built 2000 or later
7.2%
Median annual property tax
$5,143
Mean commute to work
25 min
Households with broadband internet
80.4%

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

Employment & development

Total county employment
269,861
Average weekly wage
$1,522
Top industries (by employment)
Health Care, Education, Professional Services
Annual residential building permits (county)
866

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

How it compares

ZIP 21057State medianUS median
Median home value$663,310$452,533$289,727
Median sale price$740,000$450,000$325,000
Median days on market4 days40 days51 days
Median annual property tax$5,143$3,862$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 21057?
$663,310.
What is the median sale price in ZIP 21057?
$740,000.
How long do homes take to sell in ZIP 21057?
Median days on market: 4 days.
What is typical rent in ZIP 21057?
2-bedroom fair-market rent: $1,704/month (HUD FMR — a 40th-percentile regulatory reference, not market-observed).
What is the natural-hazard risk in ZIP 21057?
Overall risk: Relatively High (FEMA NRI, county-level). Top hazards: winterWeather, coldWave, heatWave, inlandFlooding, lightning.
Is ZIP 21057 in a flood zone?
Minimal (FEMA NFIP). FEMA flood zone X.
What is the wildfire risk in ZIP 21057?
Risk to homes is higher than 8% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
What is the radon potential in ZIP 21057?
Moderate radon potential — EPA Zone 2 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near ZIP 21057?
No current or proposed National Priorities List sites within 5 miles (EPA).
Is ZIP 21057 walkable?
Walkability index: 5.7/20 (EPA Smart Location Database).
What is the air quality in ZIP 21057?
Good. Median AQI: 45. (EPA AQI).
What is the cost of living in ZIP 21057?
Regional Price Parity: 108.0 (100 = US average) (Above Average) (BEA RPP, metro/state-level).

Nearby ZIP codes

Selling a home in Glen arm, MD?

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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