Summary:
Most Nassau County homeowners assume that if a tree is on their property, they can remove it whenever they want. It’s a reasonable assumption—and it’s wrong in most cases. Nassau County’s three towns, two cities, and more than 60 incorporated villages each operate under their own tree ordinances, and the fine for getting it wrong isn’t a slap on the wrist. It can reach $10,000 per tree. Before you call a crew or pick up a chainsaw, here’s what the permit process actually looks like—town by town, with real numbers.
Do You Need a Permit to Cut Down a Tree in Nassau County, NY?
The short answer is: probably yes, if the tree is large enough. Each of Nassau County’s three towns sets its own diameter threshold—the point at which a tree legally requires a permit before it can be removed. Fall below that threshold and you’re generally free to proceed. Meet or exceed it, and you need to file before anyone touches the tree.
What makes this tricky isn’t the rule itself—it’s that the threshold changes depending on where you live in Nassau County. A tree that’s perfectly legal to remove in one town might require a permit, a replanting commitment, and a two-week wait just one street over. That’s not an exaggeration. It’s the reality of how Nassau County is structured.
Permit Requirements by Town in Nassau County
The Town of North Hempstead uses a 6-inch diameter threshold, measured at 4.5 feet above the base—the standard DBH (diameter at breast height) measurement. Any living tree at or above that diameter requires a permit before removal. The permit fee is $25 for one or two trees, $50 for three to five, and $10 for each additional tree beyond that.
Those numbers are modest. What’s not modest is the paperwork: North Hempstead requires a property survey, proof of general liability insurance with the Town named as Certificate Holder, and—critically—a valid Nassau County Home Improvement License. Not a New York State contractor license. A Nassau County Home Improvement License specifically. Contractors who don’t hold that credential cannot legally pull a permit on your behalf in North Hempstead.
The Town of Oyster Bay defines a “tree” as any living woody plant with a trunk diameter of 8 inches or more at breast height. Below that, no permit is needed. At or above it, you’re filing. The noncommercial permit fee in Oyster Bay is $25. Simple enough, but the 8-inch threshold catches a lot of homeowners off guard—particularly those with mature oaks, maples, or sweet gums that have been quietly growing for decades in their backyard.
The Town of Hempstead governs tree removal under Chapter 184 of its municipal code. Residential permit fees run $25 for standard single-tree applications, while commercial projects are assessed at $150. Violations carry fines of up to $250 per tree under Chapter 184, but the broader exposure under Nassau County code can reach $10,000 per tree. Hempstead is the most populous town in New York State, and its inspectors do enforce these rules—this isn’t a technicality that gets quietly ignored.
Long Beach and Glen Cove operate as independent cities within Nassau County and maintain their own separate permit processes outside the town structure entirely. If you’re in either city, you’ll need to confirm requirements directly with city code enforcement before any removal begins.
What Happens If You Remove a Tree Without a Permit in Nassau County
This is where the “my neighbor did it and nothing happened” logic falls apart. Enforcement across Nassau County is real, documented, and sometimes severe. The Village of Muttontown, for example, uses a fine structure of $250 per inch of trunk diameter. A homeowner there removed seven storm-damaged trees without a permit and ended up facing $22,500 in fines. That’s not a hypothetical—it was reported by CBS News and it happened right here in Nassau County.
The maximum fine written into Nassau County code is $10,000 per tree. That’s per tree, not per job. If three large oaks come down without permits, the exposure is $30,000. Most homeowners don’t know that number until they’re already in violation.
Beyond the fines, unpermitted removal can trigger mandatory replanting requirements. Most Nassau County towns require one-for-one replacement when a healthy tree is removed—typically a native species planted at a minimum 2.5-inch caliper. If you don’t have the space or the right conditions for replanting, some towns offer a payment-in-lieu option ranging from $150 to $500, paid into a municipal tree fund. Either way, it’s an additional cost that doesn’t show up in any low-ball removal quote.
If work is done without a permit and the issue surfaces when you go to sell your home, it can complicate the transaction. Some municipalities require disclosure of unpermitted tree removal, and buyers’ attorneys do sometimes flag it during title review. Getting the permit right the first time is almost always the simpler path.
Permit to Cut Down Trees: Process, Timeline, and Real Costs
The permit fee itself is rarely the issue. At $25 to $50 for most residential applications in Nassau County, it’s a minor line item. What homeowners are really paying for when they hire a knowledgeable tree service is the time and expertise to figure out which permit applies to their specific address, file it correctly, and move the job forward without delays or violations.
Standard permit processing in Nassau County takes 10 to 20 days from submission to approval. Emergency permits—for situations involving documented hazards—can sometimes be issued the same day, but that requires proper documentation from a certified arborist confirming the hazard. It’s not automatic, and it’s not something every contractor knows how to support.
What's Actually Included in a Tree Removal Permit Application
Filing a tree removal permit in Nassau County isn’t just a one-page form. Depending on the municipality, a complete application typically requires a property survey showing the tree’s location relative to the lot lines and any structures, a site plan or sketch, documentation of the tree’s species and trunk diameter, proof of contractor licensing, and proof of insurance.
In North Hempstead specifically, the Town must be named as the Certificate Holder on the liability policy, and the policy cannot contain an XCU Exclusion—a specific insurance carve-out that eliminates coverage for explosion, collapse, and underground damage. That’s a detail most homeowners have never heard of, and it’s the kind of thing that causes applications to get rejected and timelines to stretch.
If the tree being removed is healthy—not diseased, not storm-damaged, not structurally compromised—some municipalities require a letter from an ISA Certified Arborist as part of the application. ISA certification isn’t a minor credential. It requires at least three years of documented field experience and a passing score on a rigorous written exam. Arborists who hold that certification can assess the tree, document its condition, and produce the professional reports that move a permit application through review.
Replanting is often a condition of permit approval in Nassau County. When a healthy tree is removed, most towns require a replacement planting—one new tree, native species, at a minimum 2.5-inch caliper. If your property doesn’t have space for a new tree, or if the soil conditions near your home don’t support it, you may be able to pay into the town’s tree fund instead. That payment-in-lieu option typically runs $150 to $500. It’s worth asking about upfront, because discovering it after the fact adds an unexpected cost to a project you thought was already budgeted.
If your tree is near a utility line, PSEG Long Island handles trees that directly threaten high-voltage transmission infrastructure—and they can do so without a local permit. But that authority stops at the high-voltage lines. Trees near the secondary lines running to your house are your responsibility, and they still require a permit if they meet the diameter threshold for your town.
Why Nassau County's Permit Structure Makes Contractor Choice Matter
Nassau County’s regulatory structure exists because the county’s aging tree canopy—oaks and maples planted during the post-war suburban boom of the 1940s and 1950s are now 60 to 80 years old—creates real environmental and infrastructure stakes. Mature trees slow stormwater runoff in a county with a high coastal water table. They reduce urban heat. And when they fail, they fail on houses, cars, and people. The permit process is Nassau County’s way of ensuring that removal decisions are made deliberately and that the canopy isn’t stripped faster than it can be replaced.
For homeowners, that context matters because it explains why enforcement is real and why the rules aren’t going away. It also explains why the contractor you hire matters as much as the permit itself. A crew that shows up without a Nassau County Home Improvement License can’t legally pull a permit in North Hempstead. A contractor who doesn’t carry the right insurance—specifically, a policy that names the Town as Certificate Holder and doesn’t contain an XCU Exclusion—will have the application rejected. And a company that doesn’t mention permits at all before starting work is leaving you, the homeowner, exposed to whatever fines follow.
The North Shore communities—Great Neck, Port Washington, Manhasset, Sands Point, Locust Valley—have some of the oldest and densest tree canopy in Nassau County, much of it dating back to pre-war estate construction. Those trees are large, often in protected zones, and frequently require arborist documentation as part of the permit process. The South Shore communities—Freeport, Long Beach, Oceanside, Massapequa—deal with a different set of pressures: storm surge, wind damage, and the aftermath of events like the October 2025 nor’easter that prompted a Nassau County State of Emergency. Emergency permits are more common there, but they still require proper documentation to be issued quickly. Central Nassau—Levittown, Hicksville, Garden City, Westbury—is primarily a wind-damage market, where Cape Cod-style housing stock is particularly vulnerable to overhanging limbs and root-heaved trees near foundations.
Every part of Nassau County has its own version of this problem. The permit rules are local, the enforcement is real, and the costs of getting it wrong are steep enough to matter.
Getting a Tree Removal Permit in Nassau County Without the Headache
The permit fee itself—$25 to $50 for most residential applications—is almost never the obstacle. The obstacle is knowing which permit applies to your address, filing it correctly the first time, and working with a contractor who holds the right credentials to do it on your behalf. That’s where most homeowners run into trouble, and it’s where a lot of low-cost quotes quietly fall short.
If you’re dealing with a tree that needs to come down—whether it’s a storm-damaged oak on the South Shore, an aging maple in a North Shore historic district, or a root-heaved tree threatening your foundation in central Nassau—the permit process doesn’t have to slow you down. It just has to be handled properly from the start.
We at Long Island Best Tree Service, Inc. have been working through Nassau County’s permit landscape for more than 20 years. If you have questions about what your specific situation requires, reach out for a free estimate and we’ll walk you through exactly what’s involved.
