Retaining walls 4 feet or taller require a UCC building permit in Jersey City under N.J.A.C. 5:23. Engineered plans sealed by a NJ licensed engineer are required, with extra review near the Hudson Palisades.
Jersey City follows the New Jersey Uniform Construction Code (N.J.A.C. 5:23) for retaining wall construction, administered locally by the Jersey City Division of Construction Code Enforcement at 30 Montgomery Street. Retaining walls measuring 4 feet or more in height (from the bottom of the footing to the top) require a UCC building permit and engineered plans stamped by a New Jersey licensed professional engineer. Walls within a steep slope, waterfront, or Hudson Palisades rockfall zone require geotechnical review. Any wall that supports a surcharge (such as a driveway, structure, or sloped backfill) requires a permit regardless of height. Walls on or near property lines must observe zoning setbacks under Chapter 345 (Land Development Ordinance). Flood zone walls must comply with FEMA flood elevation standards because Jersey City has significant AE and VE zones along the Hudson waterfront.
Constructing a retaining wall over 4 feet without a UCC permit results in a stop work order and penalties of up to 2000 dollars per violation per day under N.J.A.C. 5:23-2.31. Unpermitted walls may be ordered removed or retrofitted at the owners expense.
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