Babylon, NY Building Safety: Building Permits (2026)

Under § 213-71.1, the section governing accessory structures like sheds and decks in the A Residence District, a deck standing 18 inches or less above grade is exempt from a building permit, provided it also meets the section's placement rules: at least two feet from side or rear lot lines and 50 feet from any street line. A taller deck, or one built through a Zoning Board of Appeals variance or Planning Board modification, needs a building permit first. The code sets no parallel stand-alone patio permit threshold; ground-level patios fall instead under § 213-73's permitted-encroachment rules for front and rear yards.