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Denton, TX Environmental Rules: Flood Zones (2026)

Significant Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

FEMA flood zone rules in Denton, 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 trigger: Any construction/alteration/fill in floodway or floodplain
Reviewing official: City engineer
Coverage: 100-year and 500-year floodplains
Fine: $500 per violation plus costs
Appeals: Board of adjustment hears variances

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Denton, TX.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Denton, TX on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

Denton bars any construction, alteration, fill, or grading in a mapped floodway or floodplain until the city engineer issues a development permit under Chapter 30.

To restrict or prohibit uses that are dangerous to health, safety, or property in times of flood... No permit shall be issued for the construction, alteration, or improvement of any property within a floodway or floodplain area, unless the permit shall comply with the terms hereof.

Source: Denton Code Chapter 30 - Flood Damage PreventionView official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 37 Update 1 | Development Code: Supplement 27).

Full Breakdown

City code Chapter 30 flatly prohibits permitting any construction, alteration, or improvement of property inside a floodway or floodplain area unless it complies with the chapter's terms. The city engineer reviews applications covering elevation data, drainage plans, and floodproofing certifications, and can deny a permit based on danger to life, property, and access during flooding. The rule covers both the one-hundred-year and five-hundred-year floodplains plus city-defined buffer areas, not just the mapped floodway itself.

Violations & Fines

Building or altering property in a floodway or floodplain without the permit is a misdemeanor: a $500 fine per violation plus court costs, and the city can pursue other lawful remedies (Sec. 30-58).

Frequently Asked Questions

Do I need a permit to build in Denton's floodplain?

Yes. No permit may be issued for construction, alteration, or improvement in a floodway or floodplain unless it meets Chapter 30's terms.

What happens if I skip the permit?

It's a misdemeanor carrying a $500 fine per violation plus costs, under Sec. 30-58.

Sources & Official References

[1]Denton Code of Ordinances, Ch. 30 (Flood Prevention and Protection)

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All Denton rules

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