Takoma Park, MD Fence Regulations: Retaining Walls (2026)

Retaining walls in Takoma Park are regulated by Montgomery County building code and permitting requirements. A building permit is required for retaining walls over 4 feet in height, measured from the bottom of the footing to the top of the wall. Walls over 4 feet must be designed by a licensed professional engineer. Even walls under 4 feet may require a permit if they affect drainage patterns, are near property lines, or are part of a series of tiered walls that effectively exceed 4 feet. Montgomery County Chapter 19 (stormwater management) and the sediment control regulations apply to grading and wall construction that disturbs more than 5,000 square feet. Takoma Park's hilly terrain -- particularly in the Sligo Creek watershed area -- makes retaining walls common. Walls cannot redirect stormwater onto neighboring properties. Retaining walls with fences on top are measured separately for fence height limits: the fence portion must independently meet the 4-foot (front) or 6.5-foot (side/rear) zoning height limit. The Historic District may require HAWP review for retaining walls visible from the street.