Islip's Landscaping Rules: The Rules That Matter

Every city handles landscaping rules a little differently. In Islip, New York, there are 8 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Rainwater 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.

Key details: Barrels under 100 gal: No permit. Cisterns: Permit plus backflow. Mosquito Rule: Tight lids required. Use: Outdoor/non-potable.

Open or mosquito-breeding containers: Suffolk Health $100-$500 order to abate. Unpermitted plumbing cross-connection: stop-work plus fines up to $2,500.

Islip is more permissive than most cities when it comes to rainwater harvesting. That said, there are still limits.

Tree 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.

Key details: Street Trees: Permit plus replacement. Private Trees: Generally allowed. Pine Barrens Core: Commission approval. Wetlands: NYSDEC 100 ft buffer.

Illegal street-tree removal: $1,000-$5,000 plus replacement value. Pine Barrens Core violations: stop-work plus DEC-level penalties up to $10,000.

Tree Trimming

Town of Islip Code Chapter 57 (Trees) bars anyone from cutting, damaging, or removing any tree on public or private property without the prior written consent of the owner. Separately, clearing land of trees and brush requires a Town land-clearing permit under the Subdivision and Land Development Regulations.

Key details: Tree code: Town of Islip Code Chapter 57 (Trees). Consent rule: Prior written owner consent required to cut/remove any tree. Land clearing: Permit required under Subdivision & Land Development Regs. Pending build: No clearing until building permit / site-plan approval issues. Permit authority: Islip Dept. of Planning and Development.

Cutting or removing a tree without the owner's written consent, or failing to display that consent on demand, is a violation of the Chapter 57 local law. Land clearing without a required permit is subject to the penalties and fines in the Subdivision and Land Development Regulations.

This is one of the stricter rules in Islip's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.

Artificial 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.

Key details: Permit Trigger: Over 500 sq ft. Infill: Organic/sand preferred. Stormwater: Counted as impervious. County: No Suffolk ban.

Unpermitted large installation: stop-work, $250-$1,000, and possible removal. Drainage violations: stormwater penalty plus remediation order.

Weed Ordinances

New York State Property Maintenance Code Section 302.4, enforced in Islip and restated in Town Code Section 6A-20, prohibits weeds and plant growth over 10 inches and bans all noxious weeds. The Town defines weeds as grasses, annual plants, and vegetation other than trees or shrubs, excluding cultivated gardens.

Key details: State code: NY Property Maintenance Code Section 302.4. Local code: Town of Islip Code Section 6A-20. Height limit: 10 inches (254 mm). Noxious weeds: Prohibited (no height threshold). Garden exception: Cultivated flowers and gardens exempt.

Failure to maintain a property in compliance is a violation of Town Code Chapter 6A punishable under Section 6A-21; the Town may issue an appearance ticket, levy fines, and abate the condition by Town crews with the cost assessed against the property.

Native 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.

Key details: Mandate: None - encouraged. Region: Long Island Pine Barrens flora. Incentives: NYSDEC Trees for Tribs. Shoreline Rules: Wetland permit may require.

None for choosing natives. Removal or damage to protected coastal vegetation: NYSDEC fines up to $2,500 per incident.

Islip is more permissive than most cities when it comes to native plants. That said, there are still limits.

Water Restrictions

Islip residents are served by the Suffolk County Water Authority (SCWA), which enforces a year-round odd/even lawn-watering schedule and bans automatic irrigation between 10 a.m. and 4 p.m. New York State imposes no mandatory statewide restriction under a Drought Watch; the SCWA conservation directive is the binding local rule.

Key details: Water supplier: Suffolk County Water Authority (SCWA). Odd addresses: Water on odd calendar days. Even addresses: Water on even calendar days. No-watering window: 10 a.m. to 4 p.m. daily (automatic irrigation). State Drought Watch: Voluntary, no mandatory restrictions (NYSDEC).

SCWA enforces its conservation directive through customer notices and, for repeat or willful violations during declared water emergencies, escalating enforcement; the no-watering window of 10 a.m. to 4 p.m. applies to all customers regardless of address. NYSDEC Drought Watch measures are voluntary.

Grass Height Limits

The Property Maintenance Code of New York State, which the Town of Islip enforces and mirrors in Town Code Chapter 6A, requires developed areas of a premises used by occupants or the public to be kept free from weeds (including grasses) over 10 inches (254 mm) tall. Noxious weeds are prohibited outright.

Key details: Maximum height: 10 inches (254 mm). State code: NY Property Maintenance Code Section 302.4 (Weeds). Local code: Town of Islip Code Section 6A-20. Penalty section: Town of Islip Code Section 6A-21. Enforcement: Islip Division of Code Enforcement.

A property kept out of compliance with the weed/grass standard is a violation of Town Code Chapter 6A, punishable as set forth in Town Code Section 6A-21 (penalties), which can include fines and, for unabated conditions, Town-ordered cleanup with costs charged to the owner.

The Bottom Line

Compared to many U.S. cities, Islip gives residents more room on landscaping rules. 2 of the 8 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects Islip's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.