Suffolk County, NY Property Research

Real data from four public sources, not an internal estimate: the EPA's radon zone classification, Census housing-age records, FEMA's natural hazard risk index, and NOAA's recorded storm history for this county. Every figure below links to where it actually comes from.

Hazard Summary

Radon Risk

Zone 3 -- low potential. EPA predicts an average indoor radon screening level below 2 pCi/L for this county.

This is a county-wide prediction from geology and soil data, not a measurement of any specific home -- EPA recommends testing every home regardless of zone. See our guide on negotiating radon mitigation after inspection.

Source: EPA Map of Radon Zones

Housing Age

Suffolk County has 579,790 housing units. About 51% were built in 1969 or earlier -- old enough that knob-and-tube wiring, lead-based paint, and galvanized supply lines are all realistic possibilities worth checking for, not just a general inspection line item.

2020 or later

2,553

2010-2019

20,759

2000-2009

47,066

1990-1999

51,373

1980-1989

59,780

1970-1979

102,872

1960-1969

114,911

1950-1959

99,507

1940-1949

27,672

1939 or earlier

53,297

Does knob-and-tube wiring have to be replaced before closing?

Source: U.S. Census Bureau, ACS 5-Year Estimates, Table B25034

Natural Hazard Risk

FEMA rates Suffolk County's overall natural hazard risk as Relatively High, relative to the rest of the country.

Winter WeatherVery High

Coastal FloodingVery High

Inland FloodingRelatively High

Strong WindRelatively High

LightningVery High

Source: FEMA National Risk Index

Recorded Storm History (2015-2024)

NOAA recorded 364 storm events in Suffolk County between 2015 and 2024. This is actual event history, not a risk model -- the counts below are individually logged storms, not a prediction.

Thunderstorm Wind

213

Flash Flood

110

Hail

Lightning

Tornado

Funnel Cloud

Source: NOAA National Centers for Environmental Information, Storm Events Database

Guides Relevant to This County's Housing Stock

Does a Standard Home Inspection Check for Asbestos?What Is a Federal Pacific Stab-Lok Panel and Why Inspectors Flag It?Do Federal Pacific (FPE) Panels Affect Insurance Like Zinsco Panels?Will a Zinsco Panel Fail a 4-Point Inspection?Can Cast Iron Sewer Pipes Fail a Standard Home Inspection?Can You Get Home Insurance with Aluminum Wiring?

Get Your Free Property Report

BeforeRegret pulls live seismic hazard data, validates the address, and builds era- and county-specific inspection priorities and seller questions into one report -- with anything not yet independently verified clearly labeled, not guessed at.

Get Your First Report Free

This page reports what these four public agencies have published for Suffolk County as a whole -- it is not an assessment of any specific address or property, and does not replace a licensed home inspection, radon test, or insurance review for a specific home. Data last checked August 10, 2026.