12 Underhill Avenue
12 Underhill Avenue in Prospect Heights, Brooklyn, has 9 open HPD violations, 1 of them class C, and no rent-stabilized units are on its tax bill, as of Oct 24, 2026. StreetSpy grade: F (37/100).
Multi-family walk-up · 8 units · Built 1930
StreetSpy grade: F (Severe, 37/100)
- 1 immediately hazardous violation open (the class that covers no heat, pests, lead paint and similar).
- 1 open violation is classified rent-impairing under NY Multiple Dwelling Law section 302-a.
- 10 housing complaints to 311 in the last 12 months.
- No rent-stabilized units on the tax bill. Increases aren't capped by stabilization, though Good Cause Eviction may still limit them.
More open violations per unit than 6 in 10 Brooklyn buildings this size.
- Repairs: High (9 open, 1 class C), records as of Oct 24, 2026
- Heat and hot water: No complaints, 12 mo, records as of Oct 23, 2026
- Pests: Clear (Owner reported none, 3 yr), records as of Oct 26, 2026
- Safety: Medium (1 open DOB violation), records as of Oct 23, 2026
- Registration: Through Sep 1, 2027, records as of Oct 3, 2026
Housing code violations (HPD)
9 open violations: 1 class C (immediately hazardous), 7 class B, 1 class A. 0 issued in the last 12 months. 43 on record. Oldest open violation issued 2018-11-07. Newest violation issued 2025-03-03.
HPD recorded no violation closed here in the last 12 months.
1 open violation is classified rent-impairing under NY Multiple Dwelling Law section 302-a. Section 302-a; NY Courts guidance on getting repairs.
- Class C: Self-closing door not working, east wall. , 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES AT EAST WALL LEADING TO CELLER AT PUBLIC HALL, 1st STORY, issued 2025-01-27. HPD violation 17655011
- Class B: Mold, bathroom, 1st floor. HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... APPROX 8 SQ FT CEILING AND NORTH AND WEST WALL IN THE BATHROOM LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST ORIGINAL VIOLATION 16338249 ISSUED 26-OCT-23 HAS BEEN UPGRADED TO CLASS B PER ADMINISTRATIVE CODE §27-2017.3a(3)(a) or (b). (apt 1R), issued 2024-03-27. HPD violation 16781322
- Class B: Mice, throughout the apartment, 1st floor. ADMIN. CODE: ABATE THE NUISANCE CONSISTING OF MICE IN THE ENTIRE APARTMENT LOCATED AT APT 1L, 1st STORY, APARTMENT AT SOUTH (apt 1L), issued 2018-11-07. HPD violation 10045271
- Class B: Damaged plaster or paint, ceiling, 1st room from the north, 4th floor. REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING AND ALL WALLS IN THE 1st ROOM FROM NORTH LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 4R). HPD violation 19264111
- Class B: Damaged plaster or paint, ceiling, 2nd room from the east, 4th floor. REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE 2nd ROOM FROM EAST LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 4R). HPD violation 19264112
- Class B: Damaged plaster or paint, ceiling, 3rd room from the east, 4th floor. REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING AND ALL WALLS IN THE 3rd ROOM FROM EAST LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 4R). HPD violation 19264113
- Class B: Leak or water damage, 3rd room from the east, 4th floor. , 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT CEILINC IN THE 3rd ROOM FROM EAST LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 4R). HPD violation 19264114
- Class B: Leak or water damage, 2nd room from the east, 4th floor. REPAIR THE ROOF SO THAT IT WILL NOT LEAK OVER CEILING IN THE 2nd ROOM FROM EAST LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 4R). HPD violation 19264109
311 housing complaints
10 in the last 12 months, 16 in 5 years. Most common: Water Leak (5), Unsanitary Condition (3), Paint/Plaster (2).
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
No rent-stabilized units on the tax bill.
Owner and management
Owner: B UNDERHILL LLC. Head officer: TOM ROSENBERG. Managing agent: Tom Rosenberg. This owner has 81 buildings on record, 26 graded D or F. See the full portfolio.
Last HPD registration Jun 25, 2026, valid through Sep 1, 2027.
Tax lot and city IDs
BBL 3011220039, HPD building ID 382810. HPD Online, ACRIS, DOB BIS.
Nearest subway
- Clinton-Washington Avs (C), 4 min walk
- Franklin Av (C), 9 min walk
- 7 Av (B, Q), 9 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 9 open (1 class C, 7 class B, 1 class A). 1 rent-impairing | −40 |
| 311 housing complaints (12 mo) | 10 | −20 |
| 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 2026-10-27.