Islip grading permits required under Town Code Chapter 58 for disturbance over 5,000 sq ft or altering drainage patterns. Final grade must direct water away from structures and not onto adjacent property. Dry wells sized for 100-year storm.
Engineering Division reviews grading plans. Residential projects typically require dry wells (leaching pools) sized to capture runoff from roof and impervious surfaces — standard sizing 2 inches of runoff for impervious area. No direct discharge to neighbor property or public right-of-way. Fill over 1 ft in depth requires permit. NY common-law rule: upper landowner cannot increase natural flow to lower property. Town inspects rough grade and final grade.
Unpermitted grading: 500 dollar fine plus restoration. Drainage causing neighbor flooding: civil nuisance suit plus Town abatement order.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Islip, NY
Islip Town Code Chapter 40 establishes quiet hours from 10 PM to 7 AM weekdays and 10 PM to 8 AM weekends. Unreasonable noise audible at 50 feet from a resid...
Islip, NY
Commercial vehicles, tractor-trailers, buses and advertising vehicles are banned from parking on any Islip town road between 9:00 p.m. and 6:00 a.m. (Sec. TC...
Islip, NY
New York Vehicle and Traffic Law authorizes the Town of Islip to remove and store vehicles abandoned on highways during emergencies or found where stopping, ...
Islip, NY
Retaining and other walls greater than 18 inches above average undisturbed grade must obtain a permit before construction and be set back from any property l...
Islip, NY
Islip prohibits electric fences and barbed, razor or concertina wire, requires any fence over 6 feet to be an open chain-link type, bars chain-link (cyclone)...
Islip, NY
All Islip dwellings require working smoke alarms on every story and outside each sleeping area per 19 NYCRR 1225 (FCNYS 915). Homes built or sold after April...
Side-by-side rule comparisons with other cities in Suffolk County.
See how other cities in Suffolk County handle grading & drainage.
See how Islip's grading & drainage rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.