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Environmental Rules

Environmental Rules in Flower Mound, TX: What Residents Actually Need to Know

By CityRuleLookup Editorial Team

Flower Mound maintains 100 local ordinances across all categories, and 4 of those deal specifically with environmental rules. Here is a breakdown of what the city actually requires, what is prohibited, and where Flower Mound falls on the strict-to-permissive spectrum compared to other cities.

Flood Zones

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.

Key details: 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. NFIP: Town participates -- insurance available.

Unpermitted development in flood zones carries fines up to $500 per day. Non-compliance may result in denial of future building permits, increased flood insurance rates, and potential expulsion of the community from NFIP affecting all residents.

This is one of the stricter rules in Flower Mound's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

Stormwater Management

Flower Mound regulates stormwater management under Chapter 54 (Stormwater Management and Drainage) and the Cross Timbers Conservation Development District overlay. The town holds a Texas Pollutant Discharge Elimination System (TPDES) Municipal Separate Storm Sewer System (MS4) permit. Development projects must implement stormwater pollution prevention plans and comply with post-construction stormwater quality requirements.

Key details: Code: Ch. 54 Stormwater Management. TPDES Permit: MS4 general permit from TCEQ. SWPPP: Required for 1+ acre disturbance. CTCDD Overlay: Enhanced stormwater requirements. Contact: Public Works (972) 874-6405.

Illicit discharge violations carry fines up to $500 per day. TPDES permit violations are enforced by TCEQ and may result in state penalties up to $25,000 per day. Construction sites without proper SWPPP controls face stop-work orders.

This is one of the stricter rules in Flower Mound's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

Grading & Drainage

Flower Mound regulates grading and drainage under Chapter 54 (Stormwater Management and Drainage) and Chapter 98 (Zoning). All development must maintain pre-development drainage patterns and not increase stormwater runoff to adjacent properties. Grading permits are required for earth-moving projects that alter existing drainage, and the Cross Timbers Conservation Development District overlay imposes enhanced grading restrictions to protect natural terrain.

Key details: Code: Ch. 54 / Ch. 98 Zoning. Foundation Slope: 6 inches over first 10 feet. Retaining Walls: Engineering required over 4 ft. CTCDD: Enhanced grading restrictions. Contact: Public Works (972) 874-6405.

Grading without a permit carries fines up to $500 per day. Altering drainage to damage neighboring properties may result in stop-work orders, required remediation, and civil liability. CTCDD violations may carry additional penalties.

Compared to other cities, Flower Mound takes a harder line on grading & drainage. The enforcement and penalty structure reflects that.

Erosion Control

Flower Mound requires erosion and sediment control measures on all construction sites per Chapter 54 and the TPDES Construction General Permit administered by TCEQ. Sites disturbing one acre or more must file a Notice of Intent and implement a Stormwater Pollution Prevention Plan with specific BMPs including silt fencing, inlet protection, and stabilized construction entrances.

Key details: Code: Ch. 54 / TPDES CGP TXR150000. NOI Required: Sites disturbing 1+ acre. SWPPP: Must be on site during construction. CTCDD Overlay: Enhanced erosion controls required. Final Stabilization: 70% vegetative cover for NOT.

Erosion control violations can result in stop-work orders, town fines up to $500 per day, and TCEQ state penalties up to $25,000 per day for TPDES permit violations. Failure to maintain BMPs during active construction triggers immediate corrective action notices.

This is one of the stricter rules in Flower Mound's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

The Bottom Line

Flower Mound is tougher than many cities when it comes to environmental rules. Out of the 4 rules covered here, 4 are rated strict. If you are a homeowner, renter, or business owner in Flower Mound, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.

This guide is based on Flower Mound's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.