Washington, DC Environmental Rules: Erosion Control (2026)
Key Facts
- Reviewing authority
- The Mayor (permit review)
- Triggers extra review
- Sites with mudslide hazard potential
- Drainage standard
- Adequate drainage required for subdivisions
- Max fine
- $300 per day of violation
- Max jail term
- 30 days
Summary
In Washington, D.C., every permit application for excavation, grading, fill, or construction gets a mudslide-hazard review, and subdivision proposals must provide adequate drainage before approval.
The Mayor shall review each permit application for any excavation, grading, fill, or construction to determine whether the proposed site and improvements will be reasonably safe from mudslides. If a proposed site and improvements are in a location that may have mudslide hazards, a further review shall be made by persons qualified in geology and soils engineering; and the proposed new construction, substantial improvement, or grading must: (1) Be adequately protected against mudslide damage; and (2) Not aggravate the existing hazard.
Full Breakdown
The Mayor reviews each excavation, grading, fill, or construction permit application to determine whether the site and improvements will be reasonably safe from mudslides. Sites with possible mudslide hazards get a further review by qualified geology and soils engineers, and the resulting construction or grading must be adequately protected against mudslide damage and must not aggravate the existing hazard. Separately, when the District reviews subdivision and new development proposals it requires adequate drainage to reduce flood exposure, alongside flood-resistant design for new construction and flood-safe siting of water and sewer systems.
Violations & Fines
Violating the flood hazards chapter (Title 6, Chapter 5), including its implementing regulations, is a misdemeanor punishable by a fine of up to $300 per day of violation, up to 30 days imprisonment, or both, plus liability for consequential damages, costs, and attorney fees.
Frequently Asked Questions
Do I need a permit to grade or excavate my D.C. property?
What happens if my site has a mudslide hazard?
Sources & Official References
Other rules in Washington
Compare Washington to another location·View the District of Columbia environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.