Cedar Park, TX Environmental Rules: Flood Elevation Requirements (2026)
Key Facts
- Freeboard
- 1 foot above base flood elevation
- Applies to
- New & substantially improved homes
- Certification
- By licensed engineer, architect, or surveyor
- Nonresidential option
- Floodproofing to same level
Summary
New and substantially improved residential structures in Cedar Park's mapped flood hazard areas must have their lowest floor, including any basement, elevated at least one foot above the base flood elevation.
Residential construction. New construction or substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to one (1) foot above the base flood elevation. A registered professional engineer, architect or land surveyor shall submit a certification to the Floodplain Administrator that these standards as proposed in section 3.03.007(c)(1)(A), are satisfied.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4973212; v14 updated 2026-06-25).
Full Breakdown
Section 3.03.008(b)(1) sets Cedar Park's freeboard standard: new construction and substantial improvements to residential structures must have their lowest floor, including any basement, elevated at least one foot above the base flood elevation shown on FEMA's flood insurance rate maps. A registered professional engineer, architect, or land surveyor must certify to the Floodplain Administrator that the elevation was met. Nonresidential buildings get an alternative under § 3.03.008(b)(2): the same one-foot elevation, or a fully watertight, floodproofed design engineered to resist hydrostatic and hydrodynamic forces below that level.
Violations & Fines
Same Class C misdemeanor penalty under § 3.03.009, fined per § 1.01.009 for each day of noncompliance, plus loss of the certification needed for standard-rate NFIP flood insurance on the structure.
Frequently Asked Questions
How much freeboard does Cedar Park require above base flood elevation?
Who certifies that a structure meets the elevation standard?
Sources & Official References
Other rules in Cedar Park
Texas rules heatmap·Compare Cedar Park to another location·View the Texas environmental rules overview
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Flood Elevation Requirements in Nearby Cities
How other cities in Williamson County handle flood elevation requirements.