Flood Zones: Cedar Park vs Round Rock
How do flood zones rules compare between Cedar Park, TX and Round Rock, TX?
Round Rock has fewer restrictions than Cedar Park.
Cedar Park, TX
Williamson County
All development inside a FEMA Special Flood Hazard Area requires a Floodplain Development Permit; the City enforces FIRMs adopted from the Williamson County FIS (9/6/2008) and Travis County FIS (1/6/2016).
View full Cedar Park rules →Round Rock, TX
Williamson County
Round Rock has areas in FEMA flood zones along Brushy Creek and other waterways. Properties in Special Flood Hazard Areas (SFHA) require flood insurance and must comply with floodplain development regulations.
View full Round Rock rules →Key Facts Comparison
| Fact | Cedar Park | Round Rock |
|---|---|---|
| Permit required | Yes — Floodplain Development Permit | - |
| Williamson Co. FIRM date | September 6, 2008 | - |
| Travis Co. FIRM date | January 6, 2016 | - |
| Adopting ordinance | CO59-08-09-25-C5 (amended by CO31-16-02-25-C1) | - |
| Max fine | $2,000/day | - |
| Flood Zones | - | SFHA along Brushy Creek |
| Permit Required | - | Yes — Floodplain Development Permit |
| Elevation Requirement | - | Above Base Flood Elevation (BFE) |
| NFIP Participation | - | Yes — CRS discount may apply |
| FIRM Maps | - | msc.fema.gov |
Highlighted rows indicate differences between cities.
Cedar Park FAQ
How do I check if my property is in the floodplain?
Use Williamson County's Simple Mapping Tool (gis.wilco.org/maps) or FEMA's Map Service Center (msc.fema.gov) and search by address. Contact Engineering at 512-401-5350 with questions.
Do I need a permit to put fill in my backyard?
If your lot touches the SFHA, yes — any grading, fill, or structure in or near the regulatory floodplain requires a Floodplain Development Permit before work starts.
Round Rock FAQ
Is my property in a flood zone in Round Rock?
Round Rock has areas in FEMA flood zones along Brushy Creek and other waterways. Properties in Special Flood Hazard Areas (SFHA) require flood insurance and must comply with floodplain development regulations.
Do I need flood insurance in Round Rock?
Flood Zones: SFHA along Brushy Creek. Permit Required: Yes — Floodplain Development Permit. Elevation Requirement: Above Base Flood Elevation (BFE). NFIP Participation: Yes — CRS discount may apply.
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