Knapp Street, Brooklyn: Grade C · 311, HPD & Crash Data
Grade C, 43 out of 100. How does Knapp Street in Brooklyn rank for traffic safety, noise, and cleanliness?
Livability score
Grade C, livability 43 out of 100.
Calm 49, ranked against built-up residential streets. Access 33, ranked against every street in the city. Fewer complaints per home than most built-up residential streets, but little within a walk.
That puts Knapp Street in the bottom 26% of scored streets citywide.
Strongest on housing (82) and tree cover (69). Traffic safety (2) is the weak spot.
On the record
Crashes are the mark against Knapp Street. Reported crashes here have injured 76 people since 2021, and traffic safety ranks 2 among built-up residential streets. Complaints are rare by comparison. Illegal parking is the most-filed, with 55 reports. Across every category, 142 reports sit on this street's 311 file, and 39% of them name illegal parking. Homeless person assistance is the next most-filed at 29 reports, then encampment at 17. Reports on Knapp Street span 49 distinct 311 categories. Set against the 386 homes on file, that is about 37 reports per 100 homes.
The HPD file on Knapp Street carries 2 Class C violations, the most serious of the three classes an inspector can write, about 1 per 100 homes on file. PLUTO counts 57 residential buildings and 386 homes on Knapp Street, with 0 walk-ups and 2 elevator buildings among them. Across those buildings the average is about 6.8 homes each.
Against built-up residential streets, quietness comes in at 80, with infrastructure at 22. A 22 on infrastructure places Knapp Street in the weakest quarter of built-up residential streets. Cleanliness ranks 78 on the same scale, with parking at 40. Food nearby ranks 39 and transit 15, both against every street in the city rather than inside the band. Of the three measures ranked citywide, tree cover is the strongest on Knapp Street, at 69. The band those ranks are drawn from holds about 790 built-up residential streets.
The strongest band-ranked measure on Knapp Street is housing, at 82.
None of the 386 homes on file are rent-stabilized.
Scores are built from 311 complaints, HPD violations, NYPD crash records, NYPD felony complaint records, MTA stop locations, DOHMH food permits, and the street tree census, divided by the homes and businesses on the street, updated weekly. Read the scoring method or the data sources.
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Every scored street in Brooklyn, the citywide rankings of all 5,700+ graded streets, or Queens vs Brooklyn: How the Two Boroughs Score (2026 Data).