Landscaping Rules in Islip, NY (2026)
8 verified landscaping rules for Islip, New York, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Town of Islip Chapter 56 property maintenance code limits grass and weeds to 10 inches on residential lots. Overgrown lawns are a violation subject to town abatement with the cost billed to the property owner.
Landscaping: Grass Height
Some RestrictionsTree Trimming
Town of Islip Department of Public Works manages street trees within the right-of-way. Property owners may not prune or top street trees without a permit; private-property trees may be trimmed freely subject to species protections in preservation zones.
Landscaping: Tree Trimming
Some RestrictionsTree Removal & Heritage Trees
Removing a street tree in Islip requires a DPW permit and replacement; private-property tree removal is largely unregulated except in Pine Barrens Core areas and wetland buffers where NYSDEC and Pine Barrens Commission approvals apply.
Landscaping: Tree Removal
Some RestrictionsWeed Ordinances
Islip Chapter 56 requires property owners to control noxious weeds and maintain lawns at 10 inches or less. Invasive species listed in 6 NYCRR Part 575 such as Japanese knotweed and mile-a-minute vine are regulated statewide by NYSDEC.
Landscaping: Weed Ordinances
Some RestrictionsWater Restrictions
Suffolk County Water Authority (SCWA) enforces mandatory odd/even outdoor watering in Islip from May 1 through September 30. Odd-numbered addresses water on odd dates, even on even dates; no watering between 10 a.m. and 4 p.m.
Landscaping: Water Restrictions
Some RestrictionsRainwater Harvesting
Rainwater harvesting for outdoor irrigation is legal and encouraged in Islip. No permit is needed for rain barrels under 100 gallons; cisterns that connect to plumbing require a building permit and backflow prevention per NY Plumbing Code.
Landscaping: Rainwater Harvesting
Few RestrictionsNative Plants
Islip encourages native Long Island plantings such as pitch pine, bayberry, beach plum, and little bluestem. No local mandate exists, but state and county programs offer incentives for replacing turf with native species.
Landscaping: Native Plants
Few RestrictionsArtificial Turf
Artificial turf is allowed on Islip private property subject to building-permit review when installed over 500 sq ft or tied to drainage systems. Front-yard installations must comply with stormwater and impervious-cover limits in Chapter 68A.
Landscaping: Artificial Turf
Some RestrictionsLooking for Suffolk County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Islip city rules.
Landscaping Rules in Suffolk County →