What NYC 311 service requests can—and cannot—tell you about a property

Start with the request, agency, and geography

The 311 datasets expose request type, responsible agency, created and closed dates, status, descriptors, and location fields when publishable. Some records carry BBL or address fields; others are only suitable for bounded nearby context.

LotContext keeps radius and neighborhood results separate from parcel records. A nearby request must not be represented as a finding about the searched lot.

Account for the dataset split

NYC publishes a current dataset covering 2020 forward and a historical dataset covering 2010–2019. A useful time series checks both and preserves their different retrieval and coverage states.

Avoid common overclaims

Several requests can describe one ongoing issue, and a closed request can mean administrative closure rather than a durable repair. Conversely, an empty result can reflect location matching or publication limits. Do not describe request counts as proof of safety, nuisance, illegality, or present condition.

Use 311 to frame follow-up

Look for dates, repeated descriptors, responding agencies, and related enforcement records. For an important issue, open the official service-request record and compare it with DOB or HPD evidence.