Grapevine, TX Environmental Rules: Flood Zones (2026)

Grapevine participates in the National Flood Insurance Program (NFIP) and has adopted floodplain management regulations through Chapter 7 (Buildings) or equivalent of the Code of Ordinances. FEMA Flood Insurance Rate Maps (FIRMs) identify Special Flood Hazard Areas (SFHAs), primarily along Grapevine Lake, Denton Creek, Silver Lake Creek, Big Bear Creek, and tributaries. Any construction, substantial improvement (improvement exceeding 50 percent of pre-improvement market value), or substantial damage repair within the SFHA requires a floodplain development permit. The lowest floor of new residential structures must be elevated at least 1 foot above the Base Flood Elevation (BFE), meeting or exceeding Grapevine's freeboard requirement. Non-residential structures may be elevated or dry floodproofed to the same level. Accessory structures, fill, fences, and grading within the floodplain all require review. Buildings damaged substantially must be rebuilt to current floodplain standards. Participation in FEMA's Community Rating System (CRS) gives Grapevine homeowners discounts on NFIP flood insurance premiums. Flood-prone areas around the lake and creek corridors are common, and the Grapevine Lake normal pool elevation is 535 feet with flood pool well above. Property owners can verify flood zone status on FEMA's Flood Map Service Center or by contacting Grapevine's Floodplain Administrator at (817) 410-3154. Failure to obtain permits can jeopardize flood insurance coverage and trigger enforcement.