Flood Zones: Flower Mound vs Little Elm
How do flood zones rules compare between Flower Mound, TX and Little Elm, TX?
Flower Mound and Little Elm have similar restriction levels.
Flower Mound, TX
Denton County
Flower Mound lies within the Denton and Elm Fork Trinity Watersheds with FEMA-designated Special Flood Hazard Areas along Bakers Branch, McKamy Creek, Wichita Creek, and areas surrounding Lake Grapevine. Any construction or improvements in a Special Flood Hazard Area require a Floodplain Development Permit. The town participates in the National Flood Insurance Program, and federal flood insurance is available for properties in mapped flood zones.
View full Flower Mound rules →Little Elm, TX
Denton County
Extensive FEMA flood zones exist downstream of Lewisville Lake Dam. New construction must be elevated above the Base Flood Elevation under NFIP rules.
View full Little Elm rules →Key Facts Comparison
| Fact | Flower Mound | Little Elm |
|---|---|---|
| Key Creeks | Bakers Branch, McKamy Creek, Wichita Creek | - |
| Lake | Lake Grapevine -- USACE flood control | - |
| Permit Required | Floodplain Development Permit in SFHA | - |
| Elevation | Lowest floor 1 ft above BFE | Lowest floor must be at or above BFE |
| NFIP | Town participates -- insurance available | Town participates in National Flood Insurance Program |
| Dam Exposure | - | Downstream of Lewisville Lake Dam (USACE) |
| Floodway | - | Development prohibited without no-rise certification |
| FIRM Maps | - | Available through Development Services |
Highlighted rows indicate differences between cities.
Flower Mound FAQ
How do I find out if my property is in a flood zone in Flower Mound?
Contact the Flower Mound Floodplain Manager at (972) 874-6000 for a flood zone determination. You can also check FEMA Flood Insurance Rate Maps online. Properties along Bakers Branch, McKamy Creek, Wichita Creek, and near Lake Grapevine are most likely in mapped flood hazard areas.
What triggers full floodplain compliance for an existing home?
Substantial improvement or substantial damage exceeding 50 percent of the structure's market value triggers full compliance with current floodplain regulations, including elevation of the lowest floor at least one foot above the base flood elevation.
Little Elm FAQ
Is my property in a flood zone in Little Elm?
Little Elm has significant FEMA-mapped flood zones along Lewisville Lake and downstream of the dam. The town provides Flood Insurance Rate Map panels through the Development Services department. You can also check the FEMA Flood Map Service Center at msc.fema.gov.
Do I need flood insurance in Little Elm?
If your property is in a FEMA Special Flood Hazard Area and you have a federally-backed mortgage, flood insurance is required by your lender. Even outside mapped flood zones, flood insurance is recommended given the proximity to Lewisville Lake.
Can I build in the floodplain in Little Elm?
Building in the 100-year floodplain requires elevating the structure above the Base Flood Elevation. Building in the regulatory floodway is generally prohibited unless a professional engineer provides a no-rise certification.
Compare other topics
See how Flower Mound and Little Elm compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool