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6402 24th Avenue, Brooklyn

📍 Bensonhurst, Brooklyn Built 1928 39 units Class C1 Residential
Registered to HARRY KOSLOWSKI LLC / Partnership HPD registration · updated monthly
CRITICAL RISK
15 Open Violations
1C 10B 4A
70 Complaints (12 mo) ↑ up vs prior year
0 Last 30 Days
Renting here? This building has 1 unresolved immediately-hazardous violation — ask the landlord what's being done about them before you sign.

311 Complaint Summary

0
Last 30 Days
2
Last 90 Days
70
Last 365 Days
⚠️ Complaints are up 69% compared to the previous 6 months.
🐀 5 pest infestation complaints filed with HPD since 2024
Complaint Types (Last 12 Months)
HEAT/HOT WATER
54(77%)
PLUMBING
13(19%)
UNSANITARY CONDITION
3(4%)
📅 Monthly Activity Heatmap (Last 12 Months)
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Source: NYC 311 / HPD · Synced daily · Covers HPD-managed residential buildings · Records from Jan 2024 onward

DOHMH Rat Inspection History

6 Inspections on Record
Passed Most Recent Result
2025-09-12 Most Recent Date
2025-09-12 Initial Passed
2022-12-08 Treatments Bait applied
2022-10-27 Compliance Failed for Rat Activity
2022-09-26 Initial Failed for Rat Activity
2018-03-20 Initial Passed
2015-06-11 Initial Passed

Source: NYC DOHMH Rodent Inspections · Synced daily (30-day lookback) · Inspections may cover the building's block, not the exact address · DOHMH data publishes with ~10-day lag

HPD Housing Violations

4 Class A
10 Class B
1 Class C
Driving this immediately hazardous rating
Class C Boiler room locked — no access to heating system 2024-02-13
See all 15 violations ▼
Class C § 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM DOOR LOCKED FROM WEST INNER COURT TO CELLAR AT BOILER ROOM
2024-02-13 ▼

Violation ID: #16670698

Current Status: Open

Date Issued: 2024-02-13T00:00:00.000

Description: § 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM DOOR LOCKED FROM WEST INNER COURT TO CELLAR AT BOILER ROOM

Class B § 27-2045(B)(1)(A) HMC, § 12-01, § 12-03 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL SMOKE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH DEPARTMENT OF BUILDINGS RULES AND REGULATIONS DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT D4, 4th STORY, 1st APARTMENT FROM WEST AT NORTH
2026-03-07 ▼

Violation ID: #18690680

Current Status: Open

Date Issued: 2026-03-07T00:00:00.000

Description: § 27-2045(B)(1)(A) HMC, § 12-01, § 12-03 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL SMOKE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH DEPARTMENT OF BUILDINGS RULES AND REGULATIONS DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT D4, 4th STORY, 1st APARTMENT FROM WEST AT NORTH

Class B § 27-2045(B)(1)(B) HMC, § 12-06, § 12-07, § 12-09 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL CARBON MONOXIDE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH APPLICABLE LAW AND RULES DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT D4, 4th STORY, 1st APARTMENT FROM WEST AT NORTH
2026-03-07 ▼

Violation ID: #18690679

Current Status: Open

Date Issued: 2026-03-07T00:00:00.000

Description: § 27-2045(B)(1)(B) HMC, § 12-06, § 12-07, § 12-09 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL CARBON MONOXIDE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH APPLICABLE LAW AND RULES DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT D4, 4th STORY, 1st APARTMENT FROM WEST AT NORTH

Class B § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR THE NORTH AND WEST WALLS IN THE BATHROOM LOCATED AT APT C3, 3rd STORY, 1st APARTMENT FROM SOUTH AT WEST , SECTION ''WEST''
2025-08-07 ▼

Violation ID: #18145268

Current Status: Open

Date Issued: 2025-08-07T00:00:00.000

Description: § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR THE NORTH AND WEST WALLS IN THE BATHROOM LOCATED AT APT C3, 3rd STORY, 1st APARTMENT FROM SOUTH AT WEST , SECTION ''WEST''

Class B § 27-2005 ADM CODE PROPERLY SECURE THE LOOSE 11TH MARBLE TREAD FROM BOTTOM UP AT PUBLIC HALL STAIRS, 3rd STORY, SECTION AT EAST
2025-03-16 ▼

Violation ID: #17763324

Current Status: Open

Date Issued: 2025-03-16T00:00:00.000

Description: § 27-2005 ADM CODE PROPERLY SECURE THE LOOSE 11TH MARBLE TREAD FROM BOTTOM UP AT PUBLIC HALL STAIRS, 3rd STORY, SECTION AT EAST

Class B § 27-2005 ADM CODE REPLACE WITH NEW THE MISSING SAFETY MESH AT SKYLIGHT AT PUBLIC HALL, 4th STORY
2025-03-16 ▼

Violation ID: #17776854

Current Status: Open

Date Issued: 2025-03-16T00:00:00.000

Description: § 27-2005 ADM CODE REPLACE WITH NEW THE MISSING SAFETY MESH AT SKYLIGHT AT PUBLIC HALL, 4th STORY

Class B § 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE FIRE RETARDED PLASTER AT CEILING AT PUBLIC HALL, 1st STORY
2025-03-15 ▼

Violation ID: #17762376

Current Status: Open

Date Issued: 2025-03-15T00:00:00.000

Description: § 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE FIRE RETARDED PLASTER AT CEILING AT PUBLIC HALL, 1st STORY

Class B § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE AT DOOR KNOB IN THE ENTRANCE LOCATED AT APT C4, 3rd STORY, 1st APARTMENT FROM SOUTH AT WEST
2025-02-15 ▼

Violation ID: #17696625

Current Status: Open

Date Issued: 2025-02-15T00:00:00.000

Description: § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE AT DOOR KNOB IN THE ENTRANCE LOCATED AT APT C4, 3rd STORY, 1st APARTMENT FROM SOUTH AT WEST

Class B § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ARTICLES AT PUBLIC HALL, 1st STORY, SECTION ''SOUTH''
2025-01-15 ▼

Violation ID: #17623899

Current Status: Open

Date Issued: 2025-01-15T00:00:00.000

Description: § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ARTICLES AT PUBLIC HALL, 1st STORY, SECTION ''SOUTH''

Class B § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ARTICLES AT PUBLIC HALL, 2nd STORY, SECTION ''SOUTH''
2025-01-15 ▼

Violation ID: #17623900

Current Status: Open

Date Issued: 2025-01-15T00:00:00.000

Description: § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ARTICLES AT PUBLIC HALL, 2nd STORY, SECTION ''SOUTH''

Class B § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ARTICLES AT PUBLIC HALL, 3rd STORY, SECTION ''SOUTH''
2025-01-15 ▼

Violation ID: #17623901

Current Status: Open

Date Issued: 2025-01-15T00:00:00.000

Description: § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ARTICLES AT PUBLIC HALL, 3rd STORY, SECTION ''SOUTH''

Class A §27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE
2026-03-23 ▼

Violation ID: #18729993

Current Status: Open

Date Issued: 2026-03-23T00:00:00.000

Description: §27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE

Class A §27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE
2026-03-19 ▼

Violation ID: #18721652

Current Status: Open

Date Issued: 2026-03-19T00:00:00.000

Description: §27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE

Class A § 27-2013 ADM CODE PAINT WITH LIGHT COLORED PAINT TO THE SATISFACTION OF THIS DEPARTMENT THE CEILING AT PUBLIC HALL, 1st STORY
2026-02-25 ▼

Violation ID: #18666213

Current Status: Open

Date Issued: 2026-02-25T00:00:00.000

Description: § 27-2013 ADM CODE PAINT WITH LIGHT COLORED PAINT TO THE SATISFACTION OF THIS DEPARTMENT THE CEILING AT PUBLIC HALL, 1st STORY

Class A §27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE
2026-02-19 ▼

Violation ID: #18655472

Current Status: Open

Date Issued: 2026-02-19T00:00:00.000

Description: §27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE

⚠️ What does Class C mean?

Class C violations are classified as immediately hazardous by the HPD (e.g. lack of heat or hot water, active mold, severe rodent infestations, lead-based paint, or carbon monoxide detector issues). Landlords are legally required to resolve these immediately.

Source: NYC HPD Housing Violations · Synced daily · Open violations only — closed violations excluded · Class I (administrative/registration notices) excluded from counts

What This Means If You're Considering Renting Here

This building has 1 Class C (immediately hazardous) violation currently open — the most serious HPD category. With 70 complaints filed in the last 12 months, prospective renters should exercise significant caution, request a full HPD inspection history, and consult a tenant rights organization before signing any lease.

Data current as of July 31, 2026. Always verify independently with HPD before signing a lease.

Data Disclaimer: All compliance data on this page is synced directly from municipal reports published via NYC Open Data. Complaint counts and HPD housing violations are updated daily. Building characteristics (built year, unit count, and building class) are derived from the NYC Department of City Planning's PLUTO database.

Data last updated: July 31, 2026 · Source: NYC Open Data

⚠️ Serious Concerns Found

This building has 70 complaints and 1 Class C (immediately hazardous) violations on record in the last 12 months. Review the full violation list carefully before signing any lease.

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About This Data

Complaint data is sourced from the NYC 311 Service Requests dataset (NYC Open Data). Violation data is from the HPD Housing Maintenance Code Violations dataset. Building info is based on NYC PLUTO by NYC Department of City Planning.

All records are public-domain municipal data provided as-is. Updated daily. Last verified: July 31, 2026.