141 Guernsey Street
141 Guernsey Street in Greenpoint, Brooklyn, has 9 open HPD violations, 3 of them class C, and 2 of 8 units are rent-stabilized, as of Oct 25, 2026. StreetSpy grade: D (57/100).
Multi-family walk-up · 8 units · Built 1928
StreetSpy grade: D (Poor, 57/100)
- 3 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
- 2 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.
- 2 of 8 units are rent-stabilized; 8 on the 2007 tax bill.
More open violations per unit than 6 in 10 Brooklyn buildings this size.
- Repairs: High (9 open, 3 class C), records as of Oct 25, 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 27, 2026
- Safety: Medium (1 open DOB violation), records as of Oct 23, 2026
- Registration: Renewal not yet in city data, records as of Oct 3, 2026
Housing code violations (HPD)
9 open violations: 3 class C (immediately hazardous), 3 class B, 3 class A. 0 issued in the last 12 months. 36 on record. Oldest open violation issued 2016-02-16. Newest violation issued 2020-02-25. No new HPD violation has been issued here since 2020. Most of the open count is older violations that were never closed.
HPD recorded no violation closed here in the last 12 months.
2 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: Roaches, throughout the apartment, 1st floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 1L), issued 2019-07-10. HPD violation 13158735
- Class C: Mice, throughout the apartment, 1st floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF MICE IN THE ENTIRE APARTMENT LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 1L), issued 2019-07-10. HPD violation 13158737
- Class C: Roaches, throughout the apartment, 1st floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 1L, 1st STORY (apt 1L), issued 2019-06-24. HPD violation 13137196
- Class B: Items blocking a hallway or exit (hallway). , 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ITEMS AT PUBLIC HALL, 4th STORY, issued 2020-02-25. HPD violation 13614682
- Class B: Electrical defect, ceiling. & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF MOTION SENSOR AT ELECTRICAL LIGHT FIXTURE AT CEILING VESTIBULE , 1st STORY, issued 2020-02-25. HPD violation 13614679
- Class B: Items blocking a hallway or exit (hallway). , 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ITEMS AT PUBLIC HALL, 1st STORY, issued 2020-02-25. HPD violation 13614681
- Class A: No heat / heating defect, radiator on the east wall, 3rd room from the east, 1st floor. PAINT METAL IN ACCORDANCE WITH DEPT. REGULATION THE RADIATOR AT EAST WALL IN THE 3rd ROOM FROM EAST LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 1L), issued 2019-07-10. HPD violation 13158771
- Class A: Damaged plaster or paint, kitchen, 1st floor. PAINT WITH LIGHT COLORED PAINT TO THE SATISFACTION OF THIS DEPARTMENT ALL WALLS AND CEILING IN THE KITCHEN LOCATED AT APT 1L, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 1L), issued 2019-07-09. HPD violation 13158652
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)
1 open DOB violation, a Local Law violation issued before 2000. 3 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
2 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: 2 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 KARWOWSKI. Managing agent: DOROTHY 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 3026170021, HPD building ID 305106. HPD Online, ACRIS, DOB BIS.
Nearest subway
- Nassau Av (G), 3 min walk
- Greenpoint Av (G), 8 min walk
- Bedford Av (L), 12 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 9 open (3 class C, 3 class B, 3 class A). 2 rent-impairing | −40 |
| 311 housing complaints (12 mo) | None | 0 |
| Bedbug reports (3 yr) | None reported | 0 |
| Executed evictions (3 yr) | None | 0 |
| Housing litigation | No open cases | 0 |
| Open DOB violations | 1 open DOB violation, a Local Law violation issued before 2000 | −3 |
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.