Arborist in a harness cutting a limb that reaches out over a house roof

Tree Risk Assessment · Statewide

Tree Risk Assessment in Washington, DC

Tree Risk Assessment in Washington, DC: a tree risk assessment is an arborist's evaluation of how likely a tree (or part of it) is to fail, what it would hit, and how bad the consequences would be. Locally, derechos and summer storms: The June 2012 derecho brought down trees across the city; summer storms remain the main cause of emergencies.

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Tree problems in Washington, DC that call for arborist risk assessment

1
Derechos and summer storms
The June 2012 derecho brought down trees across the city; summer storms remain the main cause of emergencies.
2
Tropical remnants
Heavy rain and wind from remnant storms topple trees on saturated soil.
3
Aging street canopy
Older street trees in tight boxes have restricted roots and decline.

What tree risk assessment covers

A tree risk assessment is an arborist's evaluation of how likely a tree (or part of it) is to fail, what it would hit, and how bad the consequences would be.

How tree risk assessment works, step by step

Describe the tree and what it's near, and you'll reach an independent provider serving Washington, DC.

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Trees in Washington, DC that most often need arborist risk assessment

Willow oak: Signature DC street tree; very large
Tulip poplar: Tall backyard and park tree; often Special-size
Red maple: Common street tree

Timing in District of Columbia

Summer: Thunderstorm and derecho season
Aug–Oct: Tropical remnants
Winter: Dormant-season pruning and planned removals

Tree rules and permits in Washington, DC

Special Trees (44 to 99.9 inches in circumference) require a DDOT Special Tree Removal Permit, applied for through the Transportation Online Permit System (TOPS).
For non-hazardous Special Trees, the owner contributes $55 per inch of circumference to the Tree Fund (or plants replacements).
Heritage Trees (100 inches or more) can't be removed unless hazardous.
Violations carry fines of not less than $300 per inch of circumference. Street trees are managed by DDOT's Urban Forestry Division and need a separate permit.

Sources (checked 2026-10-01)

Rules change and details depend on your exact property. Confirm with the city or county before work starts. This isn't legal advice.

What affects the price of arborist risk assessment in Washington, DC

The usual drivers are size, access, what's under the tree and cleanup; see the full list for arborist risk assessment.

Tree Risk Assessment in Washington, DC: common questions

Do I need a permit for tree Risk Assessment in Washington, DC?

Special Trees (44 to 99.9 inches in circumference) require a DDOT Special Tree Removal Permit, applied for through the Transportation Online Permit System (TOPS). For non-hazardous Special Trees, the owner contributes $55 per inch of circumference to the Tree Fund (or plants replacements).

Which trees in Washington, DC most often need arborist risk assessment?

Willow oak: signature DC street tree; very large Tulip poplar: tall backyard and park tree; often Special-size Red maple: common street tree

When is the best time for arborist risk assessment in Washington, DC?

Summer: Thunderstorm and derecho season Aug–Oct: Tropical remnants

Derechos and summer storms: what does it mean for arborist risk assessment in Washington, DC?

The June 2012 derecho brought down trees across the city; summer storms remain the main cause of emergencies.

Tropical remnants: what does it mean for arborist risk assessment in Washington, DC?

Heavy rain and wind from remnant storms topple trees on saturated soil.

Aging street canopy: what does it mean for arborist risk assessment in Washington, DC?

Older street trees in tight boxes have restricted roots and decline.

Other tree services in Washington, DC

More about Washington, DC: tree removal in Washington, DC · all locations

Need arborist risk assessment in Washington, DC?

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