Area data
Big pool, MD — ZIP 21711
Population: 929 (Census ACS)
The median home value in ZIP 21711 (Big pool, MD) is $349,543 — up 3.5% over the past year. Homes sell for a median $175,000 after a median 124 days on market. FEMA's National Risk Index rates the county's overall natural-hazard risk Relatively Low, with drought, heatwave, hurricane the top-rated hazards. Cost of living is 8.0% above the US average (BEA, metro/state-level).
$349,543
Median home value
+3.5%
1-year change
124
Median days on market
Relatively Low
Hazard risk (county)
Home values & appreciation
- Median home value
- $349,543
- 1-year appreciation
- +3.5%
- 3-year appreciation
- +11.9%
- All-time peak (2026-03)
- $349,817
- 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
- $175,000
- Median list price
- $277,000
- 1-year sale-price change
- -47.8%
- Median days on market
- 124 days
- Homes sold (recent period)
- 1
- Sale-to-list ratio
- 100.0%
- 1-year forecast
- +2.0%
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 Low
- Top hazards (county)
- drought, heatWave, hurricane, inlandFlooding, lightning
- Notable hazard ratings (county)
- coldWave: Relatively Low · drought: Relatively Moderate · earthquake: Relatively Low · hail: Relatively Low · heatWave: Relatively Moderate · hurricane: Relatively Moderate
- FEMA flood zone
- A
- Flood risk level
- High
- Wildfire risk to homes (county)
- Higher than 36% of US counties
- Buildings in wildfire direct-exposure zone
- 52.1%
- Radon potential (county)
- High radon potential — EPA Zone 1 of 3
- EPA Superfund (NPL) sites within 5 mi
- None
- Nearest Superfund site
- Central Chemical (Hagerstown) (15.8 mi)
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
- 54.0°F
- Average high
- 66.0°F
- Average low
- 43.0°F
- Annual precipitation
- 43.3 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)
- 42
- Days with Good air quality
- 267
- Days with Moderate air quality
- 82
- Days with Unhealthy air quality
- 2
- Highest AQI recorded (year)
- 172
Source: EPA air quality data (nearest monitoring station, annual)
Walkability & transit
- Walkability index
- 2.7 / 20
- Transit service frequency
- -99,999
- Jobs reachable by car (30 min)
- 4,708
- Jobs reachable by transit (45 min)
- 5,375
Source: EPA Smart Location Database (metropolitan block groups)
Amenities
- National parks within ~60 mi
- 10
- Nearest national park
- Antietam National Battlefield (20 mi)
- National parks include
- Antietam National Battlefield, Harpers Ferry National Historical Park, Catoctin Mountain Park
- Airports within 30 mi
- 19
- Nearest airport
- Green Landings Airport (7 mi)
- Nearest major airport
- Hagerstown Regional Richard A Henson Field (HGR) (16 mi)
- Hospitals nearby (~15 mi)
- 4
- Hospitals include
- MERITUS MEDICAL CENTER, BROOK LANE HEALTH SERVICES, MARTINSBURG VA MEDICAL CENTER
- Avg hospital rating (CMS)
- 3.0 / 5
- Best hospital rating nearby (CMS)
- 4.0 / 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)
- +509 tax filers
Source: IRS county-to-county migration data (county-level, ~12-month lag)
Housing stock
- Median year housing built
- 1,974
- Housing built before 1970
- 46.9%
- Housing built 2000 or later
- 25.7%
- Median annual property tax
- $3,092
- Households with broadband internet
- 58.1%
Source: Census ACS 5-year estimates (ZIP-level)
Employment & development
- Total county employment
- 54,247
- Average weekly wage
- $1,028
- Top industries (by employment)
- Health Care, Accommodation & Food, Administrative Services
- Annual residential building permits (county)
- 209
Sources: BLS QCEW (county-level) · Census Building Permits (county-level)
How it compares
| ZIP 21711 | State median | US median | |
|---|---|---|---|
| Median home value | $349,543 | $452,533 | $289,727 |
| Median sale price | $175,000 | $450,000 | $325,000 |
| Median days on market | 124 days | 40 days | 51 days |
| Median annual property tax | $3,092 | $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 21711?
- $349,543.
- What is the median sale price in ZIP 21711?
- $175,000.
- How long do homes take to sell in ZIP 21711?
- Median days on market: 124 days.
- What is typical rent in ZIP 21711?
- 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 21711?
- Overall risk: Relatively Low (FEMA NRI, county-level). Top hazards: drought, heatWave, hurricane, inlandFlooding, lightning.
- Is ZIP 21711 in a flood zone?
- High (FEMA NFIP). FEMA flood zone A.
- What is the wildfire risk in ZIP 21711?
- Risk to homes is higher than 36% of US counties (USDA Forest Service Wildfire Risk to Communities, county-level).
- What is the radon potential in ZIP 21711?
- High radon potential — EPA Zone 1 of 3, county-level. EPA recommends testing every home regardless of zone.
- Are there Superfund sites near ZIP 21711?
- No current or proposed National Priorities List sites within 5 miles (EPA).
- Is ZIP 21711 walkable?
- Walkability index: 2.7/20 (EPA Smart Location Database).
- What is the air quality in ZIP 21711?
- Good. Median AQI: 42. (EPA AQI).
- What is the cost of living in ZIP 21711?
- Regional Price Parity: 108.0 (100 = US average) (Above 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 →