121 ST MARKS PLACE is a prewar 1910 building, 3 units in Park Slope, NYC. Owned by 121 ST. MARKS PLACE LLC. Public records show 134 open violations, 97 311 complaints on file.
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Brooklyn · March 2026
Best & worst months to sign a lease
Potential savings: ~7% by timing your move to March.
Asking rent per bedroom type — switch tabs to see each with effective (concession-net) rent.
Monthly counts over the last 7 years · all data sources
§ 27-2005 ADM CODE PROVIDE HEAVY DUTY LOCK AND LATCH SET AT BUILDING ENTRANCE DOOR
§ 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... APPROX 15 SQ FT AT NORTH WALL IN THE BATHROOM LOCATED AT APT 23, 5th STORY, 1st APARTMENT FROM WEST AT NORTH
§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE CERAMIC FLOOR TILES AT PUBLIC HALL, 1st STORY
§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE WOOD FLOOR IN THE 2nd ROOM FROM NORTH LOCATED AT APT 23, 5th STORY, 1st APARTMENT FROM WEST AT NORTH
§ 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING ELECRTOMAGNETC LOCK AT ENTRANCE DOOR TO BUILDING
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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.
Noise - Commercial — Loud Music/Party
Noise - Commercial — Loud Music/Party
Noise - Street/Sidewalk — Loud Music/Party
Noise - Commercial — Loud Music/Party
Noise - Commercial — Loud Music/Party
Noise - Commercial — Loud Music/Party
Lead — Lead Kit Request (Residential) (L10)
Noise - Commercial — Loud Music/Party
General Construction/Plumbing — Sidewalk Shed/Pipe Scafford - Inadequate Defective/None
Noise — Noise: Construction Equipment (NC1)