The short answer

Until 2003, anyone injured on a New York City sidewalk could sue the City of New York for failing to maintain it. The City defended thousands of these cases every year. In 2003, the City Council passed NYC Administrative Code §7-210, which shifted that duty onto the abutting property owner — meaning the owner of the building next to the sidewalk. The law has one major exception: owner-occupied 1-, 2-, and 3-family residences, which remain the City’s responsibility.

What §7-210 actually changed

Before §7-210, NYC sidewalks were governed by the common-law rule that the City — as the owner of the sidewalk in fee — was responsible for keeping it in reasonably safe condition. Abutting property owners had only a duty not to cause dangerous conditions (by installing improper hardware, blocking drainage, etc.). The City alone owed the affirmative duty to maintain.

§7-210 inverted that. As of September 14, 2003, the abutting property owner owes the affirmative duty. The owner can be sued for both creating a dangerous condition and failing to repair an existing one. The owner is also liable for failing to remove snow and ice — though the long-standing “storm-in-progress” doctrine continues to give owners a reasonable period after a storm ends.

The 1-, 2-, and 3-family residential exception

§7-210(b) carves out a critical exception. The shift of liability does not apply to:

… one-, two- or three-family residential real property that is (i) in whole or in part, owner occupied, and (ii) used exclusively for residential purposes.

For those properties, the pre-2003 rule still applies: the City of New York is the defendant, and a Notice of Claim must be filed within 90 days under GML §50-e. (See our Notice of Claim explainer.) The lawsuit must then be filed within one year and 90 days under GML §50-i.

The exception’s three requirements are strict:

  1. 1-, 2-, or 3-family residential real property — a small-scale residential building. Four or more units, and §7-210 puts the owner on the hook.
  2. Owner-occupied — at least one of the owners must live there. An identical 1-family house rented out to a tenant doesn’t qualify; the owner is liable under §7-210.
  3. Used exclusively for residential purposes — no commercial use. A 2-family house where the owner runs a salon out of the ground floor is mixed-use; the owner is liable under §7-210.

New York courts have applied the exception strictly. Mixed-use and tenant-occupied properties have generally been held to fall outside it.

What “reasonably safe condition” means

§7-210 imposes a reasonableness standard, not strict liability. The owner must take reasonable steps to maintain the sidewalk and repair known defects within a reasonable time after notice. Plaintiffs proving a §7-210 case must show:

  1. A dangerous condition existed — typically a height differential between sidewalk slabs, a missing slab, a tree-root-displaced slab, a broken metal grate, or an ice patch.
  2. The owner had actual or constructive notice of the condition. “Constructive notice” means the defect was visible and apparent and existed long enough that a reasonable owner should have discovered it.
  3. The condition caused the injury.

The City’s Big Apple Pothole and Sidewalk Protection Map — maintained by the Big Apple Pothole and Sidewalk Protection Corporation — is a critical piece of constructive-notice evidence in §7-210 cases. The Map records defects reported by city inspectors and citizens. A defect on the Big Apple Map is presumptive constructive notice to the abutting owner — and indispensable proof in many cases.

Trivial-defect doctrine

Not every height differential is actionable. Under the longstanding “trivial-defect” doctrine, courts dismiss claims based on minor surface irregularities — typically less than one inch — unless additional factors (poor lighting, uneven distribution of weight, sharp edges, location near a curb cut, recent rainfall) make a trivial defect dangerous. Whether a defect is trivial is fact-specific and usually decided on summary judgment after expert inspection.

Practical rule: a one-inch differential at the corner of a heavily-trafficked sidewalk in a poorly-lit area, particularly where the slab is jagged or aligned with a curb cut, is rarely deemed trivial. A flat half-inch settlement in the middle of a well-lit residential block usually is.

Snow and ice on NYC sidewalks

§7-210 applies to snow and ice too — the abutting owner must remove snow and ice from the sidewalk within four hours after snow stops falling (between 7am–9pm), per NYC Admin. Code §16-123. The common-law “storm-in-progress” doctrine still protects owners during an ongoing storm: there’s no duty to clear while precipitation is still falling. The doctrine ends a reasonable time after the storm ends — typically a few hours.

Black-ice cases — where ice forms after the storm has ended, often from refreezing meltwater — are uniquely difficult. The owner must have notice of the specific black-ice patch (actual or constructive). Cases turn on weather records (NOAA), inspection logs, and witness testimony about when the ice formed.

What still goes against the City

Even after §7-210, the City remains liable for:

  • Falls on sidewalks abutting 1-, 2-, or 3-family owner-occupied residences used exclusively for residential purposes.
  • Trees, tree pits, and tree-related defects — the City owns the trees and is responsible for them (Parks Department).
  • City-installed manhole covers, valve covers, and utility grates — even when located on a privately-abutted sidewalk.
  • Curbs and curb cuts — by long-standing custom.
  • The roadway portion of the sidewalk — pedestrian crossings at corners are technically the City’s responsibility.

For any claim against the City, the 90-day Notice of Claim applies, and the City is protected by the prior written notice rule under NYC Admin. Code §7-201: the City can only be liable for a sidewalk defect if it had prior written notice (typically through the Big Apple Map). This is one of the few areas where city sidewalk law still tilts heavily in the City’s favor.

Identifying the right defendant

Pre-suit investigation is critical:

  1. Pull the block-and-lot for the property abutting the fall location through ACRIS (NYC’s property records system).
  2. Determine the building’s classification — number of units, owner-occupancy status, residential vs. commercial use.
  3. Identify the owner of record as of the date of the fall.
  4. Search the Big Apple Map for prior defect reports at the location.
  5. File the Notice of Claim against the City within 90 days regardless — if the property turns out to qualify for the 1–3 family exception, the City is the right defendant. If it doesn’t, the Notice does no harm.
  6. Sue both the City and the abutting owner in the alternative if the classification is unclear.

Practice areas governed by §7-210

Sidewalk falls are the core of this statute, but related categories include: