Islip Town Code requires a sight triangle of 25 feet measured from the intersection of street right-of-way lines on corner lots. Fences, hedges, and obstructions over 30 inches tall are prohibited in this triangle to maintain driver visibility.
Sight triangle rules apply to all corner lots regardless of traffic volume. Street trees, mailboxes, and utility poles are exempt. Violations often emerge after traffic incidents when investigators measure visibility. NY VTL 1103 gives the town authority to enforce based on safety. Contact Islip at (631) 224-5600 for enforcement.
250 dollars first offense plus immediate trimming or removal order. If an accident results from obstruction, civil liability may attach to property owner.
See how other cities in Suffolk County handle fence requirements.
See how Islip's fence requirements rules stack up against other locations.
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