21 Avenue, Brooklyn: Grade C+ · 311, HPD & Crash Data
Grade C+, 56 out of 100. How does 21 Avenue in Brooklyn rank for traffic safety, noise, and cleanliness?
Livability score
Grade C+, livability 56 out of 100.
Calm 45, ranked against busy avenues. Access 75, ranked against every street in the city. More complaints per home than most busy avenues, but a lot within a walk.
That puts 21 Avenue in the top 33% of scored streets citywide.
Strongest on street crime (85) and food nearby (86). Parking (7) is the weak spot.
On the record
Illegal parking is the most-filed complaint on 21 Avenue, with 455 reports, and parking ranks 7 among busy avenues. Across every category, 1,381 reports sit on this street's 311 file, and 33% of them name illegal parking. Heat and hot water follows with 241 reports, and blocked driveway with 221. Reports on 21 Avenue span 81 distinct 311 categories. Divided by the homes on file, 21 Avenue carries roughly 96 reports per 100 of them.
21 Avenue carries 102 Class C violations on its HPD file, the most serious of the three classes an inspector can write, about 7 per 100 homes on file. HPD's most-cited category on 21 Avenue is pests, at 89 violations. Bed bugs accounts for 63 more, and doors for 56. City housing records put 1,432 homes in 258 residential buildings on 21 Avenue, 128 of them walk-up apartment buildings and 7 of them buildings with an elevator. That averages about 5.6 homes to a building.
Reported crashes on 21 Avenue have injured 75 people since 2021.
Among busy avenues, 21 Avenue ranks 45 on housing and 16 on infrastructure. A 16 on infrastructure places 21 Avenue in the weakest quarter of busy avenues. Traffic safety ranks 32 on the same scale, with cleanliness at 27. The citywide frame puts tree cover at 85 and transit at 65. Of the three measures ranked citywide, food nearby is the strongest on 21 Avenue, at 86. About 550 busy avenues make up the band 21 Avenue is scored inside.
The strongest band-ranked measure on 21 Avenue is quietness, at 75.
About 37% of the 1,432 homes on file are rent-stabilized, 531 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.
Nearest streets in Brooklyn
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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).