# 633 Nostrand Ave, Brooklyn What New York City's public records say about this building. Page: https://blueflo.tech/b/633-nostrand-avenue-brooklyn > These are city records, not an inspection by Blueflo. Every item shows its source and the date it was last checked. Also known as 637 Nostrand Ave, 701 St Marks Ave: one building, several doors, and this card covers all of them. ## In one line 35 open immediately hazardous (class C) HPD violations about pests and heat or hot water and fire safety and doors and windows and walls, floors and stairs (Housing Maintenance Code Violations, as of 2026-10-19) ## The building - **Year built:** 1910 (PLUTO (tax lot data), as of 2026-08-24) - **Stories:** 5 (Buildings Subject to HPD Jurisdiction, as of 2026-08-12) - **Homes:** 23 (Buildings Subject to HPD Jurisdiction, as of 2026-08-12) ## Worth knowing - 35 open immediately hazardous (class C) HPD violations about pests and heat or hot water and fire safety and doors and windows and walls, floors and stairs - 1 hazardous (class 1) building code violation from 2023 is still open - Basement on record, and the city's stormwater map shows flooding here in at least one storm scenario - 137 open HPD violations about building conditions ## Also on record - City stormwater map shows deep and contiguous flooding at this building in the Extreme storm, 2080 sea levels scenario ## Clean in the records - Water service line on record as non-lead (field inspection) (Lead Service Line Location Coordinates, as of 2026-01-30) - Boiler inspection filed Jan 2026 with no defects reported (DOB NOW: Safety Boiler, as of 2026-10-19) - Outside FEMA's 1% annual-chance flood zone (FEMA National Flood Hazard Layer, as of 2026-10-20) ## Building systems - **Boiler inspection filings:** Latest accepted inspection Jan 2026, defects reported: no (DOB NOW: Safety Boiler, as of 2026-10-19) - **Facade rating:** Not required: facade inspections apply only to buildings taller than 6 stories (DOB NOW: Safety – Facades Compliance Filings, as of 2026-10-19) - **Water service line:** Non-Lead (field inspection) (Lead Service Line Location Coordinates, as of 2026-01-30) - **FEMA flood zone:** Outside FEMA's 1% annual-chance flood zone: X (FEMA National Flood Hazard Layer, as of 2026-10-20) - **Stormwater flooding:** Extreme storm, 2080 sea levels: Deep and contiguous flooding (1 ft+); Moderate storm, 2050 sea levels: Not in mapped flooding; Moderate storm, today's sea levels: Not in mapped flooding; Limited storm, today's sea levels: Not loaded (file format unreadable) (NYC Stormwater Flood Maps, as of 2024-07-03) - **Basement:** No basement (PLUTO (tax lot data), as of 2026-08-24) ## Violations and complaints - **HPD violations:** 140 open: 137 about building conditions — walls, floors and stairs (38), pests (21), doors and windows (14), other conditions (14); 35 immediately hazardous (class C), 3 about paperwork or notices. Also 3 older records from 2016 never closed. 25 further violations from 2024–2026 were closed. 329 violations on record in all, 1999–2026 — the 179 most recent are listed here (Housing Maintenance Code Violations, as of 2026-10-19) - **DOB violations:** 2 open: 2 about building conditions (DOB Violations, as of 2026-10-19) - **Heat and hot water complaints:** 2 heat or hot water complaints (Housing Maintenance Code Complaints and Problems, as of 2026-10-20) - **Resident complaints to the city:** 38 pests, 15 doors or windows, 13 heat or hot water, 10 unsanitary conditions, 8 mold, 5 line of travel, 5 safety, 4 plumbing, 3 electrical, 3 general repairs, 2 floors or stairs, 2 leaks (Housing Maintenance Code Complaints and Problems, as of 2026-10-20) ## More systems - **Rent stabilization:** On the state's list of buildings with at least one rent-stabilized apartment (2024 registrations); listed for this tax lot (1 addresses), not under this building's address (Rent Stabilized Building Lists (2024 HCR registrations), as of 2025-11-30) - **Heat source:** Boiler burning natural gas (H.B. Smith 19A - S - 8), registration expired since Feb 2023 (Clean Air Tracking System (boiler registrations), as of 2026-10-20) - **Boiler work permits:** Latest boiler work permit 2008 (2 on record) (DOB Permit Issuance (BIS), as of 2026-10-19) - **Elevators:** No elevators registered to this building (DOB NOW Elevator Safety Compliance, as of 2026-10-19) - **Gas piping:** No open gas piping filing violations. Inspection results themselves are not published (DOB Safety Violations, as of 2026-10-19) - **Energy:** Not required: energy reporting applies to buildings over 25,000 sq ft (Energy and Water Data Disclosure (Local Law 84), as of 2025-11-25) ## Permits and work - **Permit history:** 20 permits since 1990 (DOB NOW: Build – Approved Permits, as of 2026-10-19) - **Sidewalk shed and scaffolding:** No active shed permit; permits since Oct 2017, last expired Oct 2018 (DOB NOW: Build – Approved Permits, as of 2026-10-19) - **Landmark status:** Not in a historic district on record (PLUTO (tax lot data), as of 2026-08-24) ## By apartment 19 of 23 apartments named in a city record: - Apt 1C: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/1c - Apt 1D: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/1d - Apt 1E: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/1e - Apt 2A: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/2a - Apt 2B: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/2b - Apt 2D: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/2d - Apt 3B: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/3b - Apt 3C: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/3c - Apt 3D: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/3d - Apt 3E: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/3e - Apt 4A: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/4a - Apt 4B: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/4b - Apt 4C: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/4c - Apt 4D: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/4d - Apt 4E: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/4e - Apt 5B: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/5b - Apt 5C: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/5c - Apt 5D: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/5d - Apt 5E: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/unit/5e ## Registered with the city - Diamond Mine Real Estate LLC (Agent, Registration Contacts) - OTA 701 ST MARKS LLC (CorporateOwner, Registration Contacts) - OTA 701 ST. MARKS, LLC (TaxLotOwner, PLUTO (tax lot data)) ## More - Every record behind this card: https://blueflo.tech/b/633-nostrand-avenue-brooklyn/records - The same card as JSON: https://blueflo.tech/v1/buildings/633-nostrand-avenue-brooklyn - Ask about any building from an assistant (MCP): https://blueflo.tech/mcp - Report something wrong: https://blueflo.tech/dispute?slug=633-nostrand-avenue-brooklyn - How to use this data: https://blueflo.tech/llms.txt