How do post-Harvey floodplain rules affect my Houston remodel?
Answered by AskBaily Editorial · Updated
Short answer
Hurricane Harvey (2017) and Tropical Storm Imelda (2019) reshaped Houston's Chapter 19 Floodplain Ordinance. Inside the 500-year floodplain now, not just the 100-year. Freeboard requirement raised to 2 feet above base-flood elevation. Substantial-improvement rule triggers at >50% of pre-project appraised value — forcing the lowest floor up to BFE+2'. Harris County Flood Control District maps your parcel; Baily checks at consultation.
In detail
Hurricane Harvey (2017) and Tropical Storm Imelda (2019) reshaped Houston's Chapter 19 Floodplain Ordinance. Inside the 500-year floodplain now, not just the 100-year. Freeboard requirement raised to 2 feet above base-flood elevation. Substantial-improvement rule triggers at >50% of pre-project appraised value — forcing the lowest floor up to BFE+2'. Harris County Flood Control District maps your parcel; Baily checks at consultation.
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