Environmental Rules in Chattanooga, TN

If you live in Chattanooga or are thinking about moving there, environmental rules are one of those things you probably won't think about until they affect you directly. Chattanooga has 4 specific rules on the books covering different aspects of environmental rules, and some of them might surprise you.

Stormwater Management

New development and redevelopment in Chattanooga must manage the first inch of every rainstorm on-site with no discharge to surface waters, under the City's stormwater ordinance.

Key details: SOV target: first 1 inch, 100% managed. Trigger: 1+ acre disturbance. TSS alternative: filter to 80% removal. Owner duty: inspect SCMs quarterly. Full inspection: every 5 years.

Skipping required stormwater controls or letting facilities fail violates Secs. 31-313 and 31-314; the City's general penalty (Sec. 1-8) reaches $500 per day, and the City can order corrective maintenance at the owner's expense.

Erosion Control

Any grading, excavating, or filling in Chattanooga needs a City land disturbing permit before work starts, kept on-site for inspection, with fees starting at $250 per acre.

Key details: Permit: required for all grading. Fee: $250/acre or part thereof. Simple residential: $250 minimum fee. 1+ acre: also needs state NPDES permit. Issued by: Land Development Office.

Grading without a permit violates Sec. 31-322; the City's general penalty under Sec. 1-8 runs up to $500 per day, with each day of unpermitted work counted as a separate offense.

Flood Elevation Requirements

Chattanooga requires new homes and manufactured homes in mapped flood zones to elevate the lowest floor at least two feet above base flood elevation if built of wood, or one foot if built of concrete slab.

Key details: Wood construction: 2 ft above base flood elevation. Concrete slab construction: 1 ft above base flood elevation. Nonresidential buildings: 1 ft above BFE or floodproofed. Administering office: Land Development Office. FIRM effective date: February 3, 2016.

Violating the flood ordinance is punished under Article XVIII of the City Code, with each day of noncompliance a separate offense, plus recovery of the City's enforcement costs and possible loss of flood-insurance eligibility.

Flood Zones

Chattanooga regulates every parcel inside a FEMA Special Flood Hazard Area under City Code § 38-38, rewritten by Ord. No. 14298 on December 2, 2025. All construction and other development needs a floodplain development permit from the Land Development Office Director. A wood-frame home must sit two feet above Base Flood Elevation, and the floodway allows almost no structures.

Key details: Governing section: § 38-38, enacted by Ord. No. 14298 (Dec. 2, 2025). Permit: Floodplain development permit from the Land Development Office Director. Residential floor: 2 feet above BFE (wood); 1 foot (concrete slab on grade). Non-residential floor: 1 foot above BFE, or floodproofed with engineer certification. Floodway test: Stage increase of 0.00 feet; CLOMR first if BFE rises.

A violation is punished on conviction as provided in Article XVIII, plus all costs and expenses of the case, and each day it continues is a separate offense. The City can also take any other lawful action to prevent or remedy the violation. A missing or deficient as-built elevation certification is cause for a stop-work order, and the Director can withhold the Certificate of Compliance or Occupancy until the permit holder corrects the deficiency.

This is not one of those rules that cities tend to ignore. Chattanooga actively enforces its flood zones requirements.

The Bottom Line

Chattanooga's environmental rules rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Chattanooga is broadly strict or permissive.

Keep in mind that Chattanooga can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, which shows when its source was last checked.