Do You Need an Arborist License in Washington DC?

Last updated: August 24, 2026

The District issues no arborist license — but do not mistake that for a light-touch jurisdiction. DC prices trees by the inch. Under the Urban Forest Preservation law, circumference is measured at four and a half feet, a Special Tree is one measuring between 40 and 100 inches, and a Heritage Tree is 100 inches or more. Removing a Special Tree needs a permit and costs not less than $55 an inch into the Tree Fund. Removing either without one is a fine of not less than $300 an inch. And this reaches trees on private property, not just the ones by the road.

What Washington DC Actually Requires

• No arborist license — the District issues none, there is no exam, and there is no background check attached to tree work. ISA certification is voluntary.
• Nothing to transfer in either — an out-of-state arborist credential is neither required nor recognized here, because DC issues no equivalent.
• ★ A Special Tree removal permit from the Mayor before you top, cut down, remove, girdle, break or destroy any Special Tree — a tree with a circumference between 40 and 100 inches, measured at four and a half feet.
• ★ The Tree Fund payment: not less than $55 for each inch of the circumference, unless the applicant shows the tree is hazardous or of a species approved by regulation for removal.
• ★ A Heritage Tree removal permit for anything 100 inches or more — granted only where the tree is hazardous, is an approved species, or will be relocated and replanted without significant harm.
• A three-year survival condition on relocated Heritage Trees: if the tree dies within three years of replanting, that is a violation.
• Applies on private property, and to any person or entity, including the District government.
• A Basic Business License — DC is one of the few jurisdictions with a general business license requirement on top of registering the entity.

What It Costs

Item	Cost	Notes
Arborist license	Does not exist	No exam, no experience requirement, no background check
Special Tree permit	Not less than $55 per inch	Paid into the Tree Fund; waived where the tree is hazardous or an approved species
Heritage Tree permit	Rarely granted	Only where hazardous, an approved species, or relocated and replanted — with a 3-year survival condition
Penalty, no permit	Not less than $300 per inch	A 60-inch tree is $18,000+; a 100-inch tree is $30,000+. Stated as a minimum
Basic Business License	See DLCP schedule	DC requires a general business license in addition to entity registration
General liability insurance	Not a licensing condition	No tree credential exists to attach it to — the exposure is yours
DC LLC	$99	Articles of organization, filed with DLCP

The Tree Is Priced by the Inch — and So Is the Fine

Most of this guide is about credentials: which license, which exam, which board. The District has none of that for arborists. What it has instead is the most expensive tree law a small contractor is likely to meet, and it is written in a unit that makes the risk unusually easy to calculate.

Everything turns on circumference measured at four and a half feet. Under DC Code §8-651.02, a Special Tree is a tree with a circumference between 40 inches and 100 inches. A Heritage Tree is 100 inches or more. Note that this is circumference, not diameter — a 40-inch circumference is a trunk about 13 inches across, which is an ordinary mature garden tree rather than a landmark. The protection starts far lower than people assume.

One thing to check before you quote: the statutory definition reads 40 inches, while DDOT’s public guidance has described the Special Tree range as beginning at 44 inches. The two do not match. Confirm the current threshold with the Urban Forestry Division for the specific tree in front of you rather than relying on either figure from memory.

For a Special Tree, the permit has a price and the price is per inch. Section 8-651.04 makes it unlawful for any person or entity, including the District government, without a Special Tree removal permit issued by the Mayor, to top, cut down, remove, girdle, break, or destroy any Special Tree. Unless you can show the tree is hazardous or belongs to a species approved by regulation, the permit requires paying into the Tree Fund an amount of not less than $55 for each inch of the circumference. A 60-inch tree is therefore a $3,300 line item before anyone climbs it — a number that often exceeds the cost of the removal itself, and one your customer needs to hear at the quoting stage rather than afterwards.

For a Heritage Tree, assume the answer is no. Section 8-651.04a applies the same prohibition, and the Mayor may issue a permit only where the applicant demonstrates the tree is hazardous, that it is a species approved for removal by regulation, or that it will be relocated and replanted without significant harm — and that last route carries a three-year survival requirement, so if the relocated tree dies inside three years, that death is itself a violation. Relocating a 100-inch tree is not a realistic option for most jobs, which in practice means a healthy Heritage Tree stays where it is.

The enforcement number is the one to commit to memory. Removing a protected tree without a permit draws a fine of not less than $300 per each inch of the circumference — the same rate for Special and Heritage Trees. That is at least $18,000 on a 60-inch tree and at least $30,000 on a 100-inch one, and the statute frames it as a floor rather than a ceiling. For a two-person tree service, one misidentified trunk is an extinction-level invoice.

Two practical consequences follow. First, measure before you quote, every time, at four and a half feet with a tape around the trunk — not by eye, and not on the customer’s assurance that “it’s my tree.’’ The law reaches private property. Second, get the permit in the customer’s name and the fee agreed in writing before the job, because the Tree Fund payment can dwarf your labor and nobody wants that conversation once the chipper is on site. And since DC attaches no insurance requirement to tree work at all, the cover that would answer for a mistake here is entirely your own decision.

How to Get Licensed, In Order

1. Stop looking for an arborist license — DC issues none, and there is nothing to sit or transfer.
2. Measure every tree at four and a half feet with a tape around the trunk before quoting. Circumference, not diameter.
3. Classify it: under 40 inches is unregulated by this law; 40 to 100 inches is a Special Tree; 100 inches or more is a Heritage Tree.
4. Confirm the current Special Tree threshold with the Urban Forestry Division, since the statute and DDOT’s guidance differ on the lower bound.
5. For a Special Tree, apply for the permit and budget $55 an inch into the Tree Fund unless it is hazardous or an approved species.
6. For a Heritage Tree, expect no unless it is genuinely hazardous — and treat relocation’s three-year survival condition as a liability you would be taking on.
7. Put the permit and the fee in the written contract before work starts.
8. Get the Basic Business License and register the entity — DC requires a general business license as well as the LLC.

Staying Licensed

There is no arborist license to renew in the District, so nothing expires on the credential side. What runs continuously is the permit obligation — it attaches to every protected tree, on every job, and a permit for one address does nothing for the next. Keep the Basic Business License current, since DC requires it alongside the entity. The exposure that never goes away is the $300-per-inch minimum fine: it applies to topping and girdling as well as felling, so aggressive crown reduction on a Special Tree can land in the same place as taking it down. If you subcontract, remember the prohibition runs to any person or entity — the crew that does the cutting is inside it too.

Frequently Asked Questions

Does Washington DC require an arborist license?

No. The District issues no arborist license and has no arborist board, so there is no exam, no experience requirement and no background check attached to tree work itself. What DC regulates fiercely is the trees — including trees standing on private property — through the Urban Forest Preservation law.

What is a Special Tree in DC and what does it cost to remove?

A Special Tree is a tree with a circumference between 40 inches and 100 inches, measured at a height of four and a half feet. It is unlawful to top, cut down, remove, girdle, break or destroy one without a Special Tree removal permit issued by the Mayor. Unless the tree is hazardous or an approved species, the permit requires paying into the Tree Fund an amount of not less than $55 for each inch of the circumference.

Can you remove a Heritage Tree in Washington DC?

Usually not. A Heritage Tree is one with a circumference of 100 inches or more, and it is unlawful to top, cut down, remove, girdle, break or destroy one without a Heritage Tree removal permit. The Mayor may issue that permit only where the applicant shows the tree is hazardous, that it belongs to a species approved for removal by regulation, or that it will be relocated and replanted without significant harm — and if a relocated Heritage Tree dies within three years, that is itself a violation.

What is the penalty for removing a protected tree in DC without a permit?

A fine of not less than $300 per each inch of the circumference of the tree. On a 60-inch Special Tree that is at least $18,000; on a 100-inch Heritage Tree, at least $30,000. The fine is stated as a minimum, not a cap, and it applies to any person or entity — including the District government itself.

Tree work sits alongside our full guide to starting a landscaping business in Washington DC, and the wider guide to starting a business in Washington DC.

Sources

Source	What It Covers
DC Code §8-651.02 — definitions	Circumference measured at four and a half feet, Special Tree as 40 to 100 inches, Heritage Tree as 100 inches or more
DC Code §8-651.04 — preservation of Special Trees	The permit requirement, the prohibition on topping, cutting, removing, girdling, breaking or destroying, the Tree Fund payment of not less than $55 per inch, and the fine of not less than $300 per inch
DC Code §8-651.04a — protection of Heritage Trees	The Heritage Tree permit, the hazardous / approved species / relocation routes, the three-year survival condition, and the per-inch fine
DDOT — tree permitting and regulations	How the Urban Forestry Division administers Special and Heritage Tree permits in practice
DC DLCP — domestic limited liability company	The $99 articles of organization filing fee