# 457 St Marks Ave, Brooklyn

What New York City's public records say about this building. Page: https://blueflo.tech/b/457-street-marks-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 689 Classon Ave: one building, several doors, and this card covers all of them.

## In one line

17 open immediately hazardous (class C) HPD violations about pests and fire safety and heat or hot water and mold (Housing Maintenance Code Violations, as of 2026-10-20)

## The building

- **Year built:** 1910 (PLUTO (tax lot data), as of 2026-08-24)
- **Stories:** 4 (Buildings Subject to HPD Jurisdiction, as of 2026-08-12)
- **Homes:** 23 (Buildings Subject to HPD Jurisdiction, as of 2026-08-12)

## Worth knowing

- 17 open immediately hazardous (class C) HPD violations about pests and fire safety and heat or hot water and mold
- 1 hazardous (class 1) building code violation from 2023 is still open
- 7 heat or hot water complaints filed with the city last winter
- 31 open HPD violations about building conditions

## Clean in the records

- Water service line on record as non-lead (records) (Lead Service Line Location Coordinates, as of 2026-01-30)
- Outside FEMA's 1% annual-chance flood zone; no mapped stormwater flooding (FEMA National Flood Hazard Layer, as of 2026-10-21)

## Building systems

- **Boiler inspection filings:** Latest accepted inspection Aug 2026, defects reported: yes (DOB NOW: Safety Boiler, as of 2026-10-20)
- **Facade rating:** Not required: facade inspections apply only to buildings taller than 6 stories (DOB NOW: Safety – Facades Compliance Filings, as of 2026-10-20)
- **Water service line:** Non-Lead (records) (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 2026-10-21)
- **Stormwater flooding:** Extreme storm, 2080 sea levels: Not in mapped flooding; 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:** Below grade (PLUTO (tax lot data), as of 2026-08-24)

## Violations and complaints

- **HPD violations:** 32 open: 31 about building conditions — pests (14), walls, floors and stairs (6), mold (4), fire safety (2); 17 immediately hazardous (class C), 1 about paperwork or notices. 22 further violations from 2024–2026 were closed. 257 violations on record in all, 2009–2026 — the 54 most recent are listed here (Housing Maintenance Code Violations, as of 2026-10-20)
- **DOB violations:** 6 open: 2 about building conditions, 2 about filings or paperwork, 2 older than 10 years (DOB Violations, as of 2026-10-20)
- **Heat and hot water complaints:** 7 heat or hot water complaints (Housing Maintenance Code Complaints and Problems, as of 2026-10-21)
- **Resident complaints to the city:** 14 heat or hot water, 8 paint or plaster, 5 pests, 2 plumbing, 2 safety, 1 doors or windows, 1 general repairs, 1 leaks, 1 mold (Housing Maintenance Code Complaints and Problems, as of 2026-10-21)

## More systems

- **Rent stabilization:** Not on the state's 2024 list. Owners who register late or not at all are missing, so ask HCR about a specific apartment (Rent Stabilized Building Lists (2024 HCR registrations), as of 2025-11-30)
- **Heat source:** Boiler burning natural gas (Burnham American      K5011 BURNHAM AMERICAN      K5011), registration expired since Jul 1995 (Clean Air Tracking System (boiler registrations), as of 2026-10-21)
- **Boiler work permits:** Latest boiler work permit 2011 (DOB Permit Issuance (BIS), as of 2026-10-20)
- **Elevators:** No elevators registered to this building (DOB NOW Elevator Safety Compliance, as of 2026-10-20)
- **Gas piping:** No open gas piping filing violations. Inspection results themselves are not published (DOB Safety Violations, as of 2026-10-20)
- **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:** 4 permits since 1990 (DOB NOW: Build – Approved Permits, as of 2026-10-20)
- **Sales:** No recorded sale since 2016 (NYC Citywide Annualized Calendar Sales, as of 2026-06-09)
- **Sidewalk shed and scaffolding:** No sidewalk shed permits on record (DOB NOW: Build – Approved Permits, as of 2026-10-20)
- **Landmark status:** Not in a historic district on record (PLUTO (tax lot data), as of 2026-08-24)

## By apartment

10 of 23 apartments named in a city record:

- Apt 5C: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/5c
- Apt 35C: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/35c
- Apt B: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/b
- Apt B2: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/b2
- Apt B4: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/b4
- Apt B6: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/b6
- Apt C3: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/c3
- Apt C5: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/c5
- Apt CY: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/cy
- Apt D2: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/unit/d2

## Registered with the city

- SUS-MENTAL HEALTH PROGRAMS,INC (CorporateOwner, Registration Contacts)
- Individual owner (name not shown) (TaxLotOwner, PLUTO (tax lot data))

## More

- Every record behind this card: https://blueflo.tech/b/457-street-marks-avenue-brooklyn/records
- The same card as JSON: https://blueflo.tech/v1/buildings/457-street-marks-avenue-brooklyn
- Ask about any building from an assistant (MCP): https://blueflo.tech/mcp
- Report something wrong: https://blueflo.tech/dispute?slug=457-street-marks-avenue-brooklyn
- How to use this data: https://blueflo.tech/llms.txt