Frisco, TX Environmental Rules: Flood Zones (2026)
FEMA flood zone rules in Frisco, TX, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.
Key Facts
- Permit required
- Floodplain development permit before any project
- FEMA maps used
- Collin FIS 2009 and Denton FIS 2011
- Floodway rule
- No fill or construction absent no-rise study
- Construction standard
- Anchored, flood-resistant materials, protected utilities
- Administrator
- City engineer reviews and approves permits
- Appeal path
- Board of adjustment, then the courts
Summary
Every new building or substantial improvement in a Frisco special flood hazard area must be anchored against flotation, built with flood-resistant materials, and have its utilities protected from floodwater intrusion. A floodplain development permit is required first, and encroachments into the mapped floodway are barred unless engineering studies show no rise in flood levels.
In all areas of special flood hazards the following provisions are required for all new construction and substantial improvements: (1) All new construction or substantial improvements shall be designed (or modified) and adequately anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy; (2) All new construction or substantial improvements shall be constructed by methods and practices that minimize flood damage; (3) All new construction or substantial improvements shall be constructed with materials resistant to flood damage; (4) All new construction or substantial improvements shall be constructed with electrical, heating, ventilation, plumbing, and air-conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding; (5) All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of floodwaters into the system; (6) New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into the system and discharge from the systems into floodwaters; and (7) On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
Full Breakdown
Chapter 42, Article II of the Frisco Code adopts FEMA's Flood Insurance Studies for both counties Frisco straddles: the Collin County FIS dated June 2, 2009 and the Denton County FIS dated April 18, 2011, under Section 42-26, so which county map controls depends on which side of the city line a parcel sits on. Section 42-27 requires a floodplain development permit before any land in a mapped special flood hazard area is developed, and Section 42-28 bars any structure or land use change without full compliance.
Section 42-91's general standards, which apply to all new construction and substantial improvements, require anchoring against flotation, collapse, or lateral movement from hydrodynamic and hydrostatic loads; construction methods and materials resistant to flood damage; utility and HVAC equipment located or designed to keep floodwater out; and water supply, sewage, and on-site waste systems designed to prevent floodwater infiltration or contamination. Section 42-95 separately bars encroachments, including fill and new construction, within the adopted regulatory floodway unless hydrologic and hydraulic analysis shows no increase in flood levels during a base flood discharge.
The city engineer serves as floodplain administrator under Section 42-61, reviewing and approving or denying every permit, and Section 42-64 lets the board of adjustment hear variance requests, appealable to the courts.
Violations & Fines
Developing or altering land in a mapped flood hazard area without the Section 42-27 permit, or without meeting the Section 42-91 construction standards, is noncompliance the floodplain administrator can enforce by denying or revoking the permit under Section 42-63(b). Unauthorized floodway encroachments under Section 42-95 can be blocked outright absent an engineering study proving no rise in flood levels. A property owner may appeal an administrator's decision to the board of adjustment, and from there to a court of competent jurisdiction, under Section 42-64.
Frequently Asked Questions
Do I need a permit to build in a Frisco floodplain?
Can I build inside the regulatory floodway itself?
Which FEMA flood maps apply since Frisco spans two counties?
Who reviews Frisco floodplain permits and who hears appeals?
What construction standards apply to new floodplain buildings?
Sources & Official References
Other rules in Frisco
Texas rules heatmap·Compare Frisco to another location·View the Texas environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Flood Zones in Nearby Cities
How other cities in Collin County handle flood zones.