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Florida -- population 2,698,679

Miami-Dade County, FL 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

Miami-Dade County, FL hazard summary: FEMA National Risk Index rated Very High; EPA radon zone 2 of 3; most frequently recorded hazard is flood (95 events, 2015-2024).

Radon Risk

Zone 2 -- moderate potential. EPA predicts an average indoor radon screening level between 2 and 4 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

Miami-Dade County has 1,085,414 housing units. About 34% 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
11,618
2010-2019
97,953
2000-2009
138,035
1990-1999
128,404
1980-1989
159,359
1970-1979
186,387
1960-1969
134,728
1950-1959
143,699
1940-1949
50,776
1939 or earlier
34,455

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 Miami-Dade County's overall natural hazard risk as Very High, relative to the rest of the country.

HurricaneVery High
LightningVery High
Inland FloodingVery High
Coastal FloodingVery High
Cold WaveVery High
Source: FEMA National Risk Index

Recorded Storm History (2015-2024)

NOAA recorded 324 storm events in Miami-Dade County between 2015 and 2024. This is actual event history, not a risk model -- the counts below are individually logged storms, not a prediction.

Flood
95
Thunderstorm Wind
75
Hail
52
Flash Flood
36
Lightning
20
Funnel Cloud
20
Tornado
16
Coastal Flood
10
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?How to Spot Polybutylene Pipes Before Buying a House

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 Miami-Dade 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.