Mermaid Avenue, Brooklyn: Grade C+ · 311, HPD & Crash Data
Grade C+, 57 out of 100. How does Mermaid Avenue in Brooklyn rank for traffic safety, noise, and cleanliness?
Livability score
Grade C+, livability 57 out of 100.
Calm 60, ranked against busy avenues. Access 52, ranked against every street in the city. Fewer complaints per home than most busy avenues, and a lot within a walk.
That puts Mermaid Avenue in the top 30% of scored streets citywide.
Strongest on quietness (97) and tree cover (77). Street crime (25) is the weak spot.
On the record
Illegal parking is the most-filed complaint on Mermaid Avenue, with 211 reports. Across every category, 489 reports sit on this street's 311 file, and 43% of them name illegal parking. After that the file runs to heat and hot water (67 reports) and street/sidewalk noise (33). The file runs across 73 distinct 311 categories in all. Set against the 994 homes on file, that is about 49 reports per 100 homes.
Inspectors have written 34 Class C violations on Mermaid Avenue, the tier the city treats as an immediate health or safety risk, about 3 per 100 homes on file. Pests is what HPD writes up most on Mermaid Avenue, 66 violations of it. Behind it the file holds doors (46 violations) and bed bugs (38). 218 residential buildings on Mermaid Avenue hold the 994 homes on file, 19 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.
Since 2021, 108 people have been injured in reported crashes here.
Among busy avenues, Mermaid Avenue ranks 83 on housing and 28 on traffic safety. Mermaid Avenue sits in the weaker half of busy avenues on traffic safety. Measured against busy avenues, infrastructure sits at 79 and parking at 63. The citywide frame puts food nearby at 48 and transit at 44. Mermaid Avenue ranks 77 on tree cover, the best of its three citywide measures. The band those ranks are drawn from holds about 550 busy avenues.
Quietness is the strongest of the measures ranked inside the band, at 97.
About 49% of the 994 homes on file are rent-stabilized, 486 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).