21 Street, Brooklyn: Grade C+ · 311, HPD & Crash Data
Grade C+, 52 out of 100. How does 21 Street in Brooklyn rank for traffic safety, noise, and cleanliness?
Livability score
Grade C+, livability 52 out of 100.
Calm 45, ranked against numbered streets. Access 66, ranked against every street in the city. More complaints per home than most numbered streets, but a lot within a walk.
That puts 21 Street in the top 44% of scored streets citywide.
Strongest on infrastructure (91) and food nearby (83). Cleanliness (8) is the weak spot.
On the record
More 311 reports on 21 Street name illegal parking than any other category, 74 of them, and cleanliness ranks 8 among numbered streets. Across every category, 384 reports sit on this street's 311 file, and 19% of them name illegal parking. After that the file runs to blocked driveway (58 reports) and heat and hot water (23). Reports on 21 Street span 52 distinct 311 categories. Set against the 533 homes on file, that is about 72 reports per 100 homes.
Inspectors have written 49 Class C violations on 21 Street, the tier the city treats as an immediate health or safety risk, about 9 per 100 homes on file. The category HPD cites most often here is pests, with 39 violations on file. Behind it the file holds bed bugs (29 violations) and structure (18). 115 residential buildings on 21 Street hold the 533 homes on file, 52 of them walk-up apartment buildings and 2 of them buildings with an elevator. Across those buildings the average is about 4.6 homes each.
Reported crashes on 21 Street have injured 14 people since 2021.
Of the ten measures on the card, parking ranks 47 among numbered streets and housing ranks 23. That 23 on housing puts 21 Street in the weakest quarter of numbered streets. The card also puts quietness at 42 and traffic safety at 41 among numbered streets. Transit ranks 59 and tree cover 59, both against every street in the city rather than inside the band. Food nearby is the strongest of the three citywide measures here, at 83. 21 Street is ranked against about 990 numbered streets citywide.
Infrastructure is where 21 Street ranks best against numbered streets, at 91.
Rent stabilization covers about 9% of the 533 homes on file, 45 homes in all.
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).