Due Diligence & InspectionQuestion 46
How Do I Check Houston Flood Zone Maps Before Buying?
Use the FEMA Flood Map Service Center, Harris County Flood Control District tools, and the City of Houston floodplain map to verify flood zone status and history.
Flood due diligence is arguably the most important step when buying in Houston. Here's how to do it thoroughly.
- FEMA Flood Map Service Center: msc.fema.gov — enter the address to see the official flood zone designation.
- Harris County Flood Control: hcfcd.org has detailed flood planning tools and historical flood data.
- City of Houston GIS: The city's floodplain map viewer shows 100-year and 500-year floodplains.
- Seller disclosure: Texas law requires sellers to disclose known flooding history. Read this carefully.
- Ask neighbors: Local knowledge about drainage patterns is invaluable. Door-knock adjacent properties.
Bottom Line
Cross-reference multiple sources — FEMA maps are sometimes outdated. A property can flood without being in an official flood zone. Check actual flood history, not just zone designation.