Montgomery County cannot require permits for retaining walls in unincorporated areas (no zoning authority). Conroe requires permits under IBC for walls over 4 feet. Lake Conroe waterfront walls need SJRA and USACE approval.
Texas counties lack zoning authority (Local Govt Code Ch. 231) and cannot require building permits for retaining walls in unincorporated Montgomery County. However, the Montgomery County Engineer enforces drainage rules under §232 subdivision regulations — walls cannot redirect stormwater onto neighbors (common law + Water Code §11.086). Inside Conroe city limits, the IBC/IRC adopted via Conroe Code Ch. 18 requires a building permit for retaining walls over 4 feet (measured from bottom of footing to top of wall), with engineered plans sealed by a Texas-licensed PE. Walls supporting surcharge (driveways, slopes, structures) need engineering regardless of height. Lake Conroe shoreline walls require a San Jacinto River Authority (SJRA) shoreline permit plus USACE Section 404 permit if fill is placed below the 201-foot conservation pool elevation. The Woodlands Development Standards require DSC review for walls visible from the street.
Conroe unpermitted walls: stop-work order, $500-$2,000 fine, required PE retrofit. SJRA violations on Lake Conroe: removal order and restoration. County drainage violations actionable as §11.086 civil claim plus §232 enforcement.
Montgomery County, TX
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Montgomery County, TX
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Montgomery County, TX
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Montgomery County, TX
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Montgomery County, TX
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Montgomery County, TX
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