Tree pit / tree well An unpaved cut-out opening in a concrete sidewalk designed to expose the soil around a street tree's base, allowing water and air to reach its roots.
NYC DOT and Parks Department specifications require minimum tree pit dimensions—typically 4 feet by 10 feet—to protect the tree's health and prevent roots from buckling adjacent concrete flags. During sidewalk replacement, contractors must construct the tree pit boundaries to match these precise specifications. Leaving a properly sized well not only helps the tree thrive but also reduces the likelihood of future root-related sidewalk shifting and trip hazards.
Frequently Asked Questions About Tree pit / tree well
What is a tree pit?
An unpaved opening cut into the sidewalk around a street tree's base, exposing soil so water and air can reach the roots.
Is there a required size?
Yes. NYC specifies minimum tree pit dimensions to protect tree health. Confirm the current DOT and Parks standard before setting the opening.
Why does pit size matter for the sidewalk?
An undersized pit forces roots to grow laterally beneath the concrete, which is what lifts and cracks adjacent flags.
Can a tree pit be paved over?
No. Covering or reducing a required tree pit without approval harms the tree and can generate a violation.