NYC requires DOB permits for significant grading work. All development must direct stormwater to the city sewer system through approved site connections reviewed by DEP. Grading that affects adjacent properties is regulated under Admin Code §28-3309 (protection of adjoining property).
Grading and drainage in NYC are regulated by the DOB and DEP. Significant grading work — particularly for new construction, additions, and landscaping that alters drainage patterns — requires a DOB work permit with plans prepared by a licensed professional. NYC's flat terrain and high water table in many areas (especially Brooklyn, Queens, and Staten Island) make drainage design critical. All development must connect to the city's sewer system through a DEP-approved site connection under 15 RCNY Ch. 31. Property owners are responsible for ensuring their grading does not direct stormwater onto adjacent properties (Admin Code §28-3309). In the MS4 areas, additional stormwater quality requirements apply. Excavation deeper than 10 feet requires special DOB permits and monitoring of groundwater levels. The NYC Plumbing Code governs subsurface drainage including foundation drains and sump pumps. Illegal grading that creates flooding conditions on neighboring properties can result in emergency orders.
Grading without a permit: DOB violation starting at $2,500. Directing stormwater onto adjacent property: civil liability plus DOB enforcement. Illegal connection to the sewer system: DEP penalty up to $10,000. Failure to maintain proper drainage: Housing Code violations.
New York, NY
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New York, NY
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New York, NY
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New York, NY
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New York, NY
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New York, NY
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