Laredo, TX Fence Regulations: Retaining Walls (2026)

Laredo's Land Development Code addresses retaining walls directly in the drainage and floodplain article that governs waterway construction citywide. 7, any retaining structure located within a one hundred year floodplain must be built of reinforced concrete or another material specifically approved as designed for the site's conditions, and special structural designs require supporting calculations submitted to the City Engineer for approval before work begins. The wall itself has to hit a minimum factor of safety of two against overturning and one and a half against sliding, with the underlying design criteria pulled from the City's Stormwater Management Guidance Manual rather than left to the builder's judgment.

The trigger for a building permit is height: once a wall exceeds four feet, the owner must obtain a building permit and submit an engineer's certification confirming the wall is structurally sound and constructed as per the plan specifications on file. Because this section sits inside Article 24-59 (the City's MS4 and floodplain management chapter), it is enforced through the same administrative machinery that governs drainage compliance generally, not a separate fence-permit desk. The City Engineer's office, not the Building Official alone, signs off on the structural review for any wall built in or along a floodplain, which is a stricter path than an ordinary backyard retaining wall outside a mapped floodway would face.