Bethel, CT Fence Regulations: Retaining Walls (2026)

5B(5) sets the retaining-wall standards inside Bethel's fences-and-walls provision: no retaining wall may exceed six feet in height unless the Planning and Zoning Commission modifies that limit through a Special Permit. Where a series of walls creates terraces, each wall must sit at least five feet apart from the next, and the terraced area between them cannot exceed a slope steeper than one foot of rise for three feet of horizontal run, a 1:3 ratio. The regulation also requires landscaping at the top and base of the walls and on the terraces to blend the wall with the surrounding site, and it specifically bars smooth-faced concrete, requiring a finish material the Commission finds attractive.

5C(2) sets the permit trigger: a retaining wall reaching four feet or higher above ground level cannot be built without a building permit, and the application must include a plan from a licensed engineer addressing both construction design and drainage within 10 feet of the wall. Because the four-foot permit threshold sits two feet below the six-foot maximum height, most retaining walls of any real size in Bethel need an engineered drainage plan even while still qualifying as an as-of-right structure under the six-foot cap. These standards sit inside the zoning rewrite the Commission adopted December 10, 2024, effective May 15, 2025.