What you can and can't clear:
NY DEC rules, in plain terms.

This is a general guide, not legal advice — every property is its own situation. The framework below is what we walk through on most pre-job site visits where any wet feature is in play.

The two regulatory frameworks

There are two main DEC rules that come up for landowners clearing brush near water:

• Article 24 — Freshwater Wetlands Act. Governs activities in protected wetlands and their adjacent area (typically the first 100 feet around the wetland boundary).
• Article 15 — Protection of Waters Act. Governs activities in the bed and banks of protected streams.

Either rule, if it applies, requires a permit before disturbing the regulated area. Some clearing activities are exempt, some need a general permit, some need an individual permit. Below is what each one covers.

What counts as a regulated freshwater wetland

Under the 2025 regulatory changes, a wetland is jurisdictional in New York if it meets one of two tests:

• It's at least 12.4 acres in size. As of January 1, 2025, this threshold replaced the older mapping-based system. A wetland this size or larger is regulated whether or not it appears on a DEC map.
• It meets the "Unusual Importance" criteria. Smaller wetlands can still be regulated if they support endangered species, perform exceptional ecological functions, or fall within other specific categories defined in the regulations.

The threshold drops again on January 1, 2028, when the regulated size minimum becomes 7.4 acres. Owners planning longer-horizon land management should keep that date in mind — a 9-acre wet meadow that isn't regulated today may be regulated in three years.

The 100-foot adjacent area

Beyond the wetland boundary itself, an "adjacent area" is also regulated. For a standard freshwater wetland the adjacent area extends 100 feet measured horizontally from the wetland edge. Disturbing this 100-foot ring — clearing trees, regrading, dredging, filling — generally requires a permit even though no actual wetland is being touched.

Two important exceptions where the buffer is wider:

• Nutrient-poor wetlands (acid bogs and certain other communities) have a 300-foot adjacent area.
• Productive vernal pools have an adjacent area extended up to 800 feet.

The vernal-pool buffer is the one that surprises most landowners. A seasonal pool the size of a backyard pond, dry for half the year, can carry a buffer the size of a football field plus most of a parking lot. The reason is biological — the salamanders and wood frogs that breed in the pool spend the rest of the year in the surrounding forest, and the 800-foot radius is roughly how far those amphibians range.

Protected streams

Separately from wetlands, NY's Protection of Waters Act regulates streams classified by water quality. Stream classes that are "protected" — meaning a permit is required to disturb their bed or banks — are:

• Class AA — drinking water sources.
• Class A — high-quality water for swimming and aquatic life.
• Class B — secondary contact recreation, fish propagation.
• Class C(T) — supports trout.
• Class C(TS) — supports trout spawning.

Streams classified C without a (T) or (TS), or D, are not under Protection of Waters jurisdiction (though they may still matter for other permits, county rules, or wetland adjacency).

A common misunderstanding: there is no statewide 50-foot stream setback in NY. The "50 feet" number that gets quoted is part of the legal definition of a stream bank, not a permit buffer. Activities on the bed or bank of a protected stream require a permit; activities upland of the bank are not automatically subject to Protection of Waters jurisdiction, though DEC recommends staying back at least 50 feet from any protected stream when adding impervious surface.

DEC publishes the official map of stream classifications on the Environmental Resource Mapper. For any clearing project near a stream, that's the right place to look up which class applies.

Agriculture and silviculture exemptions

Article 24 explicitly excludes certain activities on land in active agricultural or silvicultural use:

• Grazing and watering livestock.
• Selective timber cutting.
• Harvesting natural wetland products (hay, cranberries, etc.).
• Draining for the cultivation of agricultural crops.

What the exemption does not cover:

• Clear-cutting trees in a wetland or its adjacent area.
• Filling a wetland.
• Construction of non-agricultural structures.
• Activities once the agricultural use ceases — at that point the wetland regulations apply again.

The practical version for landowners: an active farm cutting hay through a wet meadow is exempt. The same land sold to a homeowner who wants to clear the entire wet section to put in a pond is not. The exemption depends on bona fide ag use, not on a label.

Forestry mulching as practiced — selective understory removal, retaining canopy and mast trees — fits the "selective timber cutting" framing more naturally than clear-cutting does. But the agricultural exemption is interpreted narrowly, and we don't lean on it without confirmation from DEC for the specific site.

Section 305-a, briefly

Section 305-a of the Agriculture and Markets Law protects farm operations within designated agricultural districts from unreasonably restrictive local laws. Farm operations under this law include timber operations and the production of mulch and biomass crops. Where it applies, 305-a can override certain town ordinances that would otherwise restrict the work. It doesn't override DEC wetland or stream rules — those are state-level, not local — but for owners running an active farm, it's worth knowing the statute exists. Whether it applies to a given clearing job is case-specific.

What we ask for during the walkthrough

Before scheduling a job on a property with any wet features, we usually want to know:

• Is there a wetland on the parcel? Owner observation plus a check of the DEC Environmental Resource Mapper covers most cases.
• Are any streams crossed by the work zone? If yes, what's their classification?
• What's the distance from the work zone to any wetland edge? Inside 100 feet, we slow down. Inside 300 or 800 for the special-case buffers, we slow down a lot.
• Has DEC ever inspected or flagged the parcel? Some properties have file history.
• Is the property in an agricultural district? If yes, 305-a may add protections worth knowing about.

In ambiguous cases the right move is to call DEC directly — Region 4 covers most of the Capital District and Region 5 covers the Adirondacks and the northern part of our service area. DEC will usually do a jurisdictional determination at no cost; the determination is in writing and stays valid for several years.

What this looks like for a typical job

For the average backyard or fence-line job we cover in the fence-line piece, none of this is in play — there's no wetland and no stream. The work happens, the chips fall, the line gets readable.

Where it matters is on:

• Properties with a pond, beaver impoundment, or wet meadow on or near the parcel.
• Properties with an intermittent or perennial stream crossing or bordering the work zone.
• Vernal pool habitat — common in upstate hardwood forests, not always obvious if the pool is dry the week you walk the property.
• Long parcels in commercial corridor work where the line crosses regulated features.

None of these are reasons to avoid the work. They're reasons to plan it. Permits take weeks, not months, in most cases — and "weeks" stops being a problem if it's built into the schedule from the start.

The summary

Wetland and stream rules in NY are knowable. The 2025 changes made the size threshold for regulated wetlands cleaner — 12.4 acres now, dropping to 7.4 in 2028. The 100-foot adjacent area applies to most regulated wetlands. Special-case buffers run to 300 or 800 feet for sensitive types. Protected streams are anything classified C(T) or better. Selective forestry mulching rarely runs into permit issues, but proximity to water always changes the conversation. We'd rather have that conversation before the trailer pulls up than after.