{"bbl":"3033260001","bins":["3076117"],"address":"541 Knickerbocker Avenue, Brooklyn, NY 11221","address_line":"541 Knickerbocker Avenue","borough":"Brooklyn","zip":"11221","block":3326,"lot":1,"url":"https://nycpropertyfacts.com/ny/brooklyn/541-knickerbocker-avenue-3033260001","markdown_url":"https://nycpropertyfacts.com/ny/brooklyn/541-knickerbocker-avenue-3033260001.md","api_url":"https://nycpropertyfacts.com/api/v1/property/3033260001","summary":"541 Knickerbocker Avenue (Brooklyn, NY 11221; tax lot BBL 3033260001) is a 6-unit mixed-use building with apartments and ground-floor commercial space (building class S5: mixed-use: five- or six-family home with one store or office), built around 1931, on a 2,500 sq ft lot zoned R6. City tax records list the owner as SERLIN BUILDING LIMITED PARTNERSHIP; per ACRIS, a deed to this owner dated December 4, 2008 lists a price of $11,740,800 in a deed covering 10 lots. The Department of Finance's final market value for tax year 2027 is $1,121,000. As of October 31, 2026, NYC Open Data shows two DOB jobs with a permit issued but no sign-off, two open HPD violations and three OATH tickets with an unpaid balance. There were four 311 requests in the past 12 months and five HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)","how_to_cite":"NYC Property Facts, “541 Knickerbocker Avenue, Brooklyn, NY 11221 (BBL 3033260001)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/brooklyn/541-knickerbocker-avenue-3033260001. Source: NYC Open Data.","citation_note":"Quote the summary as-is and cite with how_to_cite (includes the canonical URL and the data-as-of date).","data_as_of":"2026-10-31","last_updated":"2026-10-31","open_items":{"total":7,"dob_jobs_permit_not_signed_off":2,"dob_violations_active":0,"ecb_violations_active":0,"hpd_violations_open":2,"oath_tickets_unpaid":3,"data_as_of":"2026-10-31"},"facts":{"owner_of_record":"SERLIN BUILDING LIMITED PARTNERSHIP","building_class":"S5","building_class_description":"Mixed-use: five- or six-family home with one store or office","land_use":"Mixed residential & commercial","year_built":1931,"floors":4,"buildings":1,"residential_units":6,"total_units":7,"lot_area_sqft":2500,"building_area_sqft":7500,"zoning":["R6"],"historic_district":null,"landmark":null,"latitude":40.6975005,"longitude":-73.9155581,"dataset_id":"64uk-42ks","dataset":"PLUTO (Dept. of City Planning)","url":"https://data.cityofnewyork.us/d/64uk-42ks","dataset_updated":"2026-08-24","data_as_of":"2026-10-31"},"assessment":{"tax_year":"2027","roll":"final","market_value":1121000,"assessed_value":504450,"tax_class":"2B","dataset_id":"8y4t-faws","dataset":"DOF Property Valuation and Assessment Data","url":"https://data.cityofnewyork.us/d/8y4t-faws","dataset_updated":"2026-09-14","data_as_of":"2026-10-31"},"last_priced_deed":{"document_id":"2008121000367001","date":"2008-12-04","amount":11740800,"doc_type":"DEED","lots_in_deed":10,"dataset_id":"bnx9-e6tj","dataset":"ACRIS Real Property Master","url":"https://data.cityofnewyork.us/d/bnx9-e6tj","dataset_updated":"2026-10-08","data_as_of":"2026-10-31"},"record_counts":{"permits":24,"violations":15,"complaints":9,"hearings":56,"sales":4,"owners":6},"sections":{"permits":"https://nycpropertyfacts.com/api/v1/property/3033260001/permits","violations":"https://nycpropertyfacts.com/api/v1/property/3033260001/violations","complaints":"https://nycpropertyfacts.com/api/v1/property/3033260001/complaints","hearings":"https://nycpropertyfacts.com/api/v1/property/3033260001/hearings","sales":"https://nycpropertyfacts.com/api/v1/property/3033260001/sales","owners":"https://nycpropertyfacts.com/api/v1/property/3033260001/owners"},"also_recorded_as":[],"sources":[{"key":"pluto","dataset_id":"64uk-42ks","dataset":"PLUTO (Dept. of City Planning)","url":"https://data.cityofnewyork.us/d/64uk-42ks","dataset_updated":"2026-08-24","data_as_of":"2026-10-31"},{"key":"footprints","dataset_id":"5zhs-2jue","dataset":"Building Footprints","url":"https://data.cityofnewyork.us/d/5zhs-2jue","dataset_updated":"2026-10-25","data_as_of":"2026-10-31"},{"key":"dob_permits_bis","dataset_id":"ipu4-2q9a","dataset":"DOB Permit Issuance (BIS)","url":"https://data.cityofnewyork.us/d/ipu4-2q9a","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"dob_now_permits","dataset_id":"rbx6-tga4","dataset":"DOB NOW: Build – Approved Permits","url":"https://data.cityofnewyork.us/d/rbx6-tga4","dataset_updated":"2026-10-30","data_as_of":"2026-10-31"},{"key":"dob_jobs_bis","dataset_id":"ic3t-wcy2","dataset":"DOB Job Application Filings (BIS)","url":"https://data.cityofnewyork.us/d/ic3t-wcy2","dataset_updated":"2026-10-30","data_as_of":"2026-10-31"},{"key":"dob_now_jobs","dataset_id":"w9ak-ipjd","dataset":"DOB NOW: Build – Job Application Filings","url":"https://data.cityofnewyork.us/d/w9ak-ipjd","dataset_updated":"2026-10-30","data_as_of":"2026-10-31"},{"key":"dob_violations","dataset_id":"3h2n-5cm9","dataset":"DOB Violations","url":"https://data.cityofnewyork.us/d/3h2n-5cm9","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"ecb_violations","dataset_id":"6bgk-3dad","dataset":"DOB ECB Violations","url":"https://data.cityofnewyork.us/d/6bgk-3dad","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"oath","dataset_id":"jz4z-kudi","dataset":"OATH Hearings Division Case Status","url":"https://data.cityofnewyork.us/d/jz4z-kudi","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"hpd_violations","dataset_id":"wvxf-dwi5","dataset":"HPD Housing Maintenance Code Violations","url":"https://data.cityofnewyork.us/d/wvxf-dwi5","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"hpd_complaints","dataset_id":"ygpa-z7cr","dataset":"HPD Housing Maintenance Code Complaints and Problems","url":"https://data.cityofnewyork.us/d/ygpa-z7cr","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"hpd_registrations","dataset_id":"tesw-yqqr","dataset":"HPD Multiple Dwelling Registrations","url":"https://data.cityofnewyork.us/d/tesw-yqqr","dataset_updated":"2026-10-28","data_as_of":"2026-10-31"},{"key":"hpd_contacts","dataset_id":"feu5-w2e2","dataset":"HPD Registration Contacts","url":"https://data.cityofnewyork.us/d/feu5-w2e2","dataset_updated":"2026-10-28","data_as_of":"2026-10-31"},{"key":"sr311","dataset_id":"erm2-nwe9","dataset":"311 Service Requests from 2020 to Present","url":"https://data.cityofnewyork.us/d/erm2-nwe9","dataset_updated":"2026-10-31","data_as_of":"2026-10-31"},{"key":"assessment","dataset_id":"8y4t-faws","dataset":"DOF Property Valuation and Assessment Data","url":"https://data.cityofnewyork.us/d/8y4t-faws","dataset_updated":"2026-09-14","data_as_of":"2026-10-31"},{"key":"acris_master","dataset_id":"bnx9-e6tj","dataset":"ACRIS Real Property Master","url":"https://data.cityofnewyork.us/d/bnx9-e6tj","dataset_updated":"2026-10-08","data_as_of":"2026-10-31"},{"key":"acris_legals","dataset_id":"8h5j-fqxa","dataset":"ACRIS Real Property Legals","url":"https://data.cityofnewyork.us/d/8h5j-fqxa","dataset_updated":"2026-10-08","data_as_of":"2026-10-31"},{"key":"acris_parties","dataset_id":"636b-3b5g","dataset":"ACRIS Real Property Parties","url":"https://data.cityofnewyork.us/d/636b-3b5g","dataset_updated":"2026-10-08","data_as_of":"2026-10-31"}],"disclaimer":"Independent site. Data from NYC Open Data; not affiliated with the City of New York. Facts are compiled automatically and may be incomplete or out of date; this is not a title search or an official record. Verify with the issuing agency."}