20 4 AVENUE, Brooklyn, NY, 11217 is a rental building in Park Slope, NYC. See every violation, 311 complaint, tenant review, and the LucidIQ score — before you sign a lease.
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Monthly counts over the last 7 years · all data sources
No HPD records on file in the last 7 years.
Asking rent per bedroom type — switch tabs to see each with effective (concession-net) rent.
Brooklyn · March 2026
Best & worst months to sign a lease
Potential savings: ~7% by timing your move to March.
Portfolio-level grade reflects the landlord's buildings across NYC, weighted by unit count. Individual building grades may differ.
View full landlord profileTop 5 by score · of 46 total
ACRIS deeds and regulatory filings
Park Slope is the quintessential Brooklyn family neighborhood — brownstone-lined streets, Prospect Park on the doorstep, excellent schools, and a Whole Foods for the stroller set.