What is a tree preservation ordinance?
A local law that requires permits or imposes restrictions on removing, topping, or damaging trees that meet a minimum diameter threshold, typically to protect the community's tree canopy.
Most Westchester County municipalities have enacted tree preservation ordinances that control what property owners can do with mature trees on their land. These laws generally set a diameter threshold (often 6 to 8 inches) and require that any tree meeting or exceeding that size cannot be removed without a municipal permit. Some ordinances also restrict pruning, topping, or damaging protected trees, even if removal is not the intent.
The rules vary by town. Some municipalities allow removal only for hazard mitigation, disease control, or approved development. Others grant permits more freely but require mitigation measures such as replanting at a ratio (for example, two new trees for every mature tree removed). Penalties for unpermitted removal can include fines or orders to replant.
These ordinances exist to maintain tree canopy cover, reduce stormwater runoff, improve air quality, and preserve property values and neighborhood character. Property owners and contractors must verify local rules before any tree work. Anyone planning tree removal services in Westchester should confirm whether the town where the work will occur requires a permit and what conditions apply.