Area data
Stony brook, NY — ZIP 11790
Population: 21,074 (Census ACS)
Home values & appreciation
- Median home value
- $797,463
- 1-year appreciation
- +8.6%
- 3-year appreciation
- +17.2%
- 5-year appreciation
- +32.6%
- 10-year appreciation
- +73.8%
- All-time peak (2026-07)
- $797,463
- House Price Index
- 420.6 (+5.3% YoY)
Market activity
- Median sale price
- $810,000
- Median list price
- $799,000
- Median days on market
- 17 days
- Sale-to-list ratio
- 101.2%
- Active listings
- 19
- 1-year forecast
- +2.6%
- New listings (monthly)
- 21
Rents
- Typical rent
- $4,983/mo
- 1BR fair-market rent
- $1,377/mo
- 3BR fair-market rent
- $2,185/mo
Affordability
- Cost of living index (High)
- 115.5 (100 = US avg)
- Electricity rate (state-level)
- 26.4¢/kWh
- Natural gas rate (state-level)
- $17.60/MCF
- 30-year mortgage rate (national)
- 6.66%
- 15-year mortgage rate (national)
- 6.00%
Schools
- Total schools
- 2
- Elementary schools
- 1
- Middle schools
- 1
- High schools
- 0
Natural hazards & flood risk
- Overall hazard risk
- Relatively High
- Top hazards
- coastalFlooding, iceStorm, lightning, winterWeather, coldWave
- FEMA flood zone
- X
- Flood risk level
- Minimal
Climate (30-year normals)
- Average annual temperature
- 56.0°F
- Average high
- 63.0°F
- Average low
- 48.0°F
- Annual precipitation
- 57.9 in
- Annual snowfall
- 9.9 in
Air quality
- Air quality rating
- Good
- Median AQI (annual)
- 41
- Days with Good air quality
- 278
- Days with Unhealthy air quality
- 2
Walkability & transit
- Walkability index
- 1.8 / 20
- Transit service frequency
- -99,999
Amenities
- National parks within ~60 mi
- 19
- Nearest national park
- Fire Island National Seashore (16 mi)
- Nearest airport
- Long Island MacArthur Airport (ISP) (8 mi)
- Nearest major airport
- Long Island MacArthur Airport (ISP) (8 mi)
- Hospitals nearby (~15 mi)
- 12
- Avg hospital rating
- 3.6 / 5
- Solar radiation rating
- Fair (4.0 kWh/m²/day)
Migration
- Net migration
- -5,821 tax filers
Housing stock
- Median year housing built
- 1,965
- Median annual property tax
- $10,001
- Mean commute to work
- 21 min
- Households with broadband internet
- 83.5%
Employment & development
- Total county employment
- 559,257
- Average weekly wage
- $1,369
- Top industries (by employment)
- Health Care, Accommodation & Food, Construction
- Annual residential building permits (county)
- 838
Area data compiled from public government, academic, and industry research feeds. Data sources →
Data last updated
Most recent source refresh: Aug 2026. See all data sources →