Tree Pit & Yard Rat Burrow Treatment in New York

How do I know if a hole is an active rat burrow?

Active burrows usually have smooth, worn edges, fresh soil nearby and no cobwebs or debris blocking the entrance. Runways of flattened earth lead to them, and droppings or gnawing may be close. A hole with leaves, webs or old dirt over it is more likely to be old or unused.

A technician may check a burrow by lightly loosening the opening and returning later to see whether it was reopened. Do not do this yourself unless you are comfortable doing so, and do not reach into a hole.

If you are unsure, take a photo and describe where it is when you call. Rats also use gaps beside foundations, so what looks like a yard problem may be linked to the building.

Look at the pattern as well as the hole. Several openings along one fence, each with a worn path between them and the bins, point to a colony that feeds nearby. A single hole with no runway and no fresh soil is more likely a past dig.

How do trash rules affect rats in yards and tree pits?

Residential buildings of one to nine units must put trash in bins of 55 gallons or less with secure lids, from November 12, 2024, with fines starting January 2, 2025. The official NYC Bin has wheels and a rat-resistant lid. Closed bins remove a major food source from yards and tree pits.

Food-related businesses had to containerize trash from September 1, 2023, and all businesses from March 1, 2024. Manhattan Community Board 9 required all trash in containers of some kind by June 1, 2025. Rules for larger residential buildings are not covered here, so check with your owner or managing agent.

A lidded bin that is left open, overfilled or damaged still feeds rats, so lids and placement matter. Our guide to bins, bags and rats covers the timeline in more detail.

When are rat burrows most active in New York?

Rat activity can be seen all year, but burrowing and breeding in yards and tree pits often increase as the weather warms from March into spring. In autumn, rats and mice commonly look for indoor shelter as nights cool, which is when yard burrows and cellar entry points tend to connect.

Central Park's mean temperature rises from 31.5 F in January to 76.8 F in July, and a mild stretch in March or April can bring activity above ground. The seasonal pattern here is general framing rather than a local count, and every yard is different.

That makes spring a sensible time to inspect, and autumn a sensible time to seal. A visit in either season gives the technician fresh signs to work with.

In practice that means checking the bin area, the tree pit and the back fence whenever the weather turns, and again before the cold sets in, so you catch new holes while they are fresh.

Who is responsible for a rat burrow in a shared yard?

In a multiple dwelling, owners must keep the premises free of rats under Article 151 of the NYC Health Code. A yard shared by several units is generally the owner's responsibility, while a private garden belongs to its occupant. Tree pits and pavement edges may involve other parties, so ask before treating.

If rats are in a shared yard, report it to the owner or managing agent in writing, and call 311 if it is not fixed. HPD can cite owners for pests, and a written report of burrow locations and recommended repairs makes the request concrete.

In a co-op or condo, the board normally arranges treatment. If you have received a notice, see landlord pest violation response.