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GA Blog: flood

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2.20.20 New Research on Coastal Flooding & Home Values

Data scientists from First Street Foundation and Columbia University have expanded their
peer-reviewed housing market research to include 2.5 million coastal properties in Massachusetts,Maine, New Hampshire, and Rhode Island and found that increased tidal flooding caused by sea level rise has eroded $403.1 million in relative home values between 2005 and 2017. Coastal homes in Massachusetts were hit hardest, losing $273.4 million in relative appreciation.

First Street's data identified the top 5 Massachusetts hardest hit cities which included: Saugus, Nahant and Salisbury.

Homeowners can learn how much relative value their personal property missed out on over the 12 year study period and how much value it is projected to lose over the next 15 years at . is the first publicly available database that gives coastal residents, homeowners, and prospective homebuyers access to comprehensive flood risk and property value loss information.

First Street Foundation is a 501(c)(3) tech nonprofit that quantifies and communicates the impacts of sea level rise and flooding.

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