Environmental Rules in Rockville, MD (2026)
4 verified environmental rules for Rockville, Maryland, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Any Rockville project disturbing 5,000+ square feet, or adding as little as 250 square feet of new pavement on non-residential land, must provide on-site stormwater management.
Rockville Stormwater Management Permit Requirements
Some RestrictionsRockville City Code § 19-40(a)
(a) Except as otherwise provided, the SWM provisions of this chapter and the regulations apply to any development that: (1) Involves five thousand (5,000) square feet or more of disturbed area; (2) Creates or replaces two thousand (2,000) square feet or more of impervious area on an single unit detached dwelling, townhouse or semi-detached dwelling lot; (3) Creates or replaces two hundred fifty...
Erosion Control
Rockville requires an approved sediment control plan and permit before any land-disturbing construction of 5,000 or more square feet, 100 or more cubic yards of grading, or any new single-family, townhouse or semi-detached home, enforced by the Department of Public Works.
Rockville Erosion and Sediment Control Rules
Some RestrictionsRockville City Code § 19-80
(a)The purpose of this article is to establish requirements and procedures to minimize damage to property and assist in maintaining water quality.(b)Anyone engaging in land disturbing activity in the City must select, design, install, inspect and maintain controls at the development project which minimize pollutants in the discharge, prevent erosion and prevent sediment from leaving the site.(c...
Flood Zones
Any filling, grading, new construction, or substantial improvement inside a FEMA-mapped special flood hazard area in Rockville needs both a City floodplain variance and a floodplain permit before work starts.
Rockville Floodplain Development Permit Rule
Significant RestrictionsRockville City Code § 10-4
A floodplain variance and floodplain permit from the City are required for development or construction within the special flood hazard area, including: filling; grading; construction of new structures; the substantial improvement of buildings or structures, including repair of substantial damage; placement or replacement of manufactured structures, including substantial improvement or repair of...
Flood Elevation Requirements
New and substantially improved residential structures in Rockville's flood hazard areas must have their lowest floor at least two feet above the base flood elevation: the City's mandatory freeboard.
Rockville Flood Protection Elevation Freeboard
Some RestrictionsRockville City Code § 10-78(1)a.
Lowest floors shall be elevated to or above the flood protection elevation (equal to two (2) feet higher than the base flood elevation).
Looking for Montgomery County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Rockville city rules.
Environmental Rules in Montgomery County →