648 Leonard Street

648 Leonard Street in Greenpoint, Brooklyn, has 66 open HPD violations, 7 of them class C, and 5 of 8 units are rent-stabilized, as of Oct 26, 2026. StreetSpy grade: D (55/100).

Multi-family walk-up · 8 units · Built 1928

StreetSpy grade: D (Poor, 55/100)

• 7 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
• 6 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a.
• The owner has 4 buildings on record; 2 graded D or F.
• 5 of 8 units are rent-stabilized; 8 on the 2007 tax bill.

More open violations per unit than 9 in 10 Brooklyn buildings this size.

• Repairs: High (66 open, 7 class C), records as of Oct 26, 2026
• Heat and hot water: No complaints, 12 mo, records as of Oct 25, 2026
• Pests: Clear (Owner reported none, 3 yr), records as of Oct 28, 2026
• Safety: Clear (No open DOB violations), records as of Oct 26, 2026
• Registration: Renewal not yet in city data, records as of Oct 3, 2026

How the grade works

Housing code violations (HPD)

66 open violations: 7 class C (immediately hazardous), 36 class B, 23 class A. 0 issued in the last 12 months. 68 on record. Oldest open violation issued 2007-09-14. Newest violation issued 2011-04-06. No new HPD violation has been issued here since 2011. Most of the open count is older violations that were never closed.

HPD recorded no violation closed here in the last 12 months.

6 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a. Section 302-a; NY Courts guidance on getting repairs.

• Class C: Lead paint hazard, east wall, 3rd room from the east, 1st floor. - CORRECT THE LEAD-BASED PAINT HAZARD - PAINT THAT TESTED POSITIVE FOR LEAD CONTENT AND THAT IS PEELING OR ON A DETERIORATED SUBSURFACE - USING WORK PRACTICES SET FORTH IN 28 RCNY ?11-06(B)(2) 1st DOOR FRAME FROM NORTH AT EAST WALL IN THE 3rd ROOM FROM EAST LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 1R), issued 2011-04-06. HPD violation 8889417
• Class C: Lead paint hazard, 1st window frame from the east, south wall, 2nd room from the east, 1st floor. - CORRECT THE LEAD-BASED PAINT HAZARD - PAINT THAT TESTED POSITIVE FOR LEAD CONTENT AND THAT IS PEELING OR ON A DETERIORATED SUBSURFACE - USING WORK PRACTICES SET FORTH IN 28 RCNY ?11-06(B)(2) 1st WINDOW FRAME FROM EAST AT SOUTH WALL IN THE 2nd ROOM FROM EAST LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 1R), issued 2011-04-06. HPD violation 8889418
• Class C: Lead paint hazard, 1st window frame from the south, west wall, 5th room from the east, 1st floor. - CORRECT THE LEAD-BASED PAINT HAZARD - PAINT THAT TESTED POSITIVE FOR LEAD CONTENT AND THAT IS PEELING OR ON A DETERIORATED SUBSURFACE - USING WORK PRACTICES SET FORTH IN 28 RCNY ?11-06(B)(2) 1st WINDOW FRAME FROM SOUTH AT WEST WALL, 2nd WINDOW FRAME FROM SOUTH AT WEST WALL IN THE 5th ROOM FROM EAST LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 1R), issued 2011-04-06. HPD violation 8889415
• Class C: No heat / heating defect (hallway). D26-17.10 ADM CODE POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDING'S HEATING SYSTEM 1 STY PUBLIC HALL & ON BOILER ROOM DOOR., issued 2008-05-28. HPD violation 1660447
• Class C: Door, lock or intercom defect, 2nd floor. SECTION 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING DOUBLE CYLINDER KEY OPERATED LOCK AT THE DOOR IN THE ENTRANCE LOCATED AT APT 2L, 2nd STORY, 1st APARTMENT FROM NORTH AT EAST (apt 2L), issued 2008-05-21. HPD violation 7296827
• Class C: Door, lock or intercom defect (entrance). SECTION 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING DOUBLE CYLINDER KEY OPERATED LOCK AT BUILDING ENTRANCE DOOR , 1st STORY, issued 2008-05-21. HPD violation 7297972
• Class C: Door, lock or intercom defect (entrance). SECTION 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING DOUBLE CYLINDER KEY OPERATED LOCK INSTALLED AT ENTRANCE DOOR TO BLDG, issued 2008-04-29. HPD violation 7256666
• Class B: Plumbing defect, bathroom, 1st floor. REMOVE ALL OBSTRUCTIONS AND REPAIR ALL DEFECTS IN AT WASH BASIN IN THE BATHROOM LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 1R), issued 2011-04-06. HPD violation 8888589

311 housing complaints

0 in the last 12 months, 0 in 5 years.

Bedbugs

The owner reported 0 infested units in the last 3 years of filings. HPD's bedbug filings are self-reported by the owner once a year; HPD does not inspect to confirm them.

• 2026: No bedbug filing on record for this year
• 2025: Owner reported 0 infested units
• 2024: Owner reported 0 infested units
• 2023: Owner reported 0 infested units
• 2022: Owner reported 0 infested units
• 2021: Owner reported 0 infested units

Buildings department (DOB)

No open DOB violations. 0 DOB violations on record. Check on DOB BIS.

Evictions and housing court

0 executed evictions in the last 3 years (0 on record). 0 open HPD cases; 0 harassment findings.

Rent stabilization

5 of 8 units rent-stabilized as of 2024. Stabilized renewals: 0% for one year and 0% for two years under RGB Order #58 (Oct 1, 2026 to Sep 30, 2027).

Rent-stabilized units on city tax bills: 5 in 2024, 8 in 2007. Source: DOF tax bills for 2007 and 2024; years with no bill on file are left out.

Owner and management

Owner: CHRISTOPHER KARWOWSKI. Head officer: CHRISTOPHER KAROWOWSKI. Managing agent: DANUTA KARWOWSKI. This owner has 4 buildings on record, 2 graded D or F. See the full portfolio.

Last HPD registration Sep 23, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.

Tax lot and city IDs

BBL 3026210051, HPD building ID 324654. HPD Online, ACRIS, DOB BIS.

Nearest subway

• Nassau Av (G), 3 min walk
• Greenpoint Av (G), 7 min walk
• Bedford Av (L), 14 min walk

How the grade is calculated

Sources: NYC HPD Housing Maintenance Code Violations, NYC 311 Service Requests, NYC HPD Bedbug Reporting, NYC Marshal Evictions (DOI), NYC HPD Housing Litigations, NYC DOB Violations, NYC DOF tax bills (via JustFix Who Owns What portfolio API, v2), NYC HPD Property Registration. Methodology. Report generated 2026-10-28.