NY State Uniform Code (Residential Code §R404) requires engineered design for retaining walls over 4 feet measured from bottom of footing. Monroe County municipalities require building permits. Setbacks apply near property lines.
NY State Residential Code §R404.1 exempts retaining walls ≤4 feet tall (measured from bottom of footing to top of wall) from engineered design requirements, unless supporting a surcharge (driveway, structure, slope). Walls over 4 feet or with surcharge require a permit and sealed plans by a NYS-licensed PE or RA. Rochester, Brighton, Pittsford, Irondequoit all require building permits for walls per Municipal Code. Drainage provisions (weep holes, gravel backfill, filter fabric) are mandatory per §R404.1.2. Setback from property lines typically 1-3 feet in most Monroe County zoning. Timber walls over 4 feet must use pressure-treated ground-contact lumber. Frost depth for footings in Monroe County: 42 inches (NY State Climate Zone 5A).
Unpermitted walls over 4 ft: stop-work, retroactive engineering review, potential demolition. Fines $250-$1,000. Failure to address drainage: correction order; failed wall liability exposure.
Monroe County, NY
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