Retaining walls in unincorporated Harris County over 4 feet in height require engineering review. Walls in FEMA flood zones need a floodplain development permit from the County Engineer. Masonry and concrete walls of any height require permits under county regulations.
Harris County does not have a standalone retaining wall ordinance but regulates them through the fire code and floodplain management regulations. Masonry and concrete walls (including retaining walls) require county permits regardless of height. Retaining walls over 4 feet typically require stamped engineering plans. In FEMA A or V flood zones, retaining walls need a floodplain development permit from the Harris County Office of the County Engineer. Retaining walls affecting drainage patterns must comply with the county's stormwater quality and infrastructure regulations. The Harris County Flood Control District may require review for walls near channels and detention basins.
Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact Harris County code enforcement directly for current fines, enforcement procedures, and hearing options.
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