317A 21 STREET, Brooklyn, NY, 11215 is a 1-unit rental building in Park Slope, NYC. See every violation, 311 complaint, tenant review, and the LucidIQ score — before you sign a lease.
Pros: Super is on top of things, clean, no package theft Cons: Walls are very thin so you can hear neighbors talking pretty often, no contact with owner - everything goes to super or real estate company who manages the…
Brooklyn · February 2026
Best & worst months to sign a lease
Potential savings: ~7% by timing your move to November.
Asking rent per bedroom type — switch tabs to see each with effective (concession-net) rent.
Portfolio-level grade reflects the landlord's buildings across NYC, weighted by unit count. Individual building grades may differ.
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Monthly counts over the last 7 years · all data sources
No HPD records on file in the last 7 years.
South Park Slope and the Gowanus borderlands offer the brownstone beauty of Park Slope with slightly more edge — the Gowanus Canal is being cleaned up, Old Stone House park hosts community events, and Fifth Avenue's bar and restaurant scene is unpretentious and local.