Flooding is part of Houston's reality. But it doesn't have to be part of YOUR reality — if you understand the risks and make informed decisions. Here's what every Houston homebuyer needs to know about flood zones. FEMA designates flood zones based on the likelihood of flooding in a given area: Zone X (shaded): Moderate flood risk. 0.2% annual chance of flooding. Flood insurance is not required but may be recommended. Zone X (unshaded): Minimal flood risk. Flood insurance is not required. Zone A, AE, AO: High flood risk. 1% annual chance of flooding. Zone V, VE: Coastal high-risk areas. Required flood insurance. If flood insurance is required, expect to pay $500–$3,000+ per year depending on the zone, elevation, and coverage amount. Over 25% of flood claims come from outside high-risk zones. The Harris County Flood Control District has invested billions in drainage improvements since Hurricane Harvey (2017).
