770 Union Street
770 Union Street in Park Slope, Brooklyn, has 28 open HPD violations, 9 of them class C, and 10 of 9 units are rent-stabilized, as of Oct 26, 2026. StreetSpy grade: F (38/100).
Multi-family walk-up · 9 units · Built 1920
StreetSpy grade: F (Severe, 38/100)
- 9 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
- 5 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a.
- 4 heat or hot water complaints to 311 in the last 12 months.
- 10 of 9 units are rent-stabilized.
More open violations per unit than 7 in 10 Brooklyn buildings this size.
- Repairs: High (28 open, 9 class C), records as of Oct 26, 2026
- Heat and hot water: 4 complaints, 12 mo, records as of Oct 25, 2026
- Pests: Clear (Owner reported none, 3 yr), records as of Oct 28, 2026
- Safety: Medium (1 open DOB violation), records as of Oct 26, 2026
- Registration: Renewal not yet in city data, records as of Oct 3, 2026
Housing code violations (HPD)
28 open violations: 9 class C (immediately hazardous), 17 class B, 2 class A. 2 issued in the last 12 months. 57 on record. Oldest open violation issued 2007-08-16. Newest violation issued 2026-05-06.
HPD recorded no violation closed here in the last 12 months.
5 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: Door, lock or intercom defect (roof). , 2007 ADM CODE REMOVE THE ILLEGAL FASTENING CONSISTING OF A LOCKABLE SLIDE BOLT INSTALLED ON DOOR TO ROOF BULK HEAD , 4th STORY, issued 2019-11-12. HPD violation 13447403
- Class C: Door, lock or intercom defect, 1st floor. , 2007 ADM CODE REMOVE THE ILLEGAL FASTENING LOCKABLE SLIDE BOLT INSTALLED AT THE INTERIOR OF DOOR IN THE ENTRANCE LOCATED AT APT 2, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 2), issued 2019-01-07. HPD violation 12838167
- Class C: Door, lock or intercom defect, 1st floor. , 2007 ADM CODE REMOVE THE ILLEGAL FASTENING LOCKABLE SLIDE BOLT AT ENTRANCE DOOR LOCATED AT APT 2, 1st STORY, 2nd APARTMENT FROM SOUTH AT WEST (apt 2), issued 2018-11-14. HPD violation 12746565
- Class C: No heat / heating defect. PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM LOCKED DOOR, issued 2018-11-14. HPD violation 12753249
- Class C: Floor or stair defect, kitchen, 1st floor. PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE WOOD FLOOR IN THE KITCHEN LOCATED AT APT 2, 1st STORY, 2nd APARTMENT FROM EAST AT SOUTH (apt 2), issued 2011-05-03. HPD violation 8925218
- Class C: No hot water. PROVIDE HOT WATER AT ALL HOT WATER FIXTURES (apt 7), issued 2007-08-16. HPD violation 5273944
- Class C: No heat / heating defect (basement). PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM DOOR LOCKED AT CELLAR, 2nd STORY, issued 2007-08-16. HPD violation 5333675
- Class C: No heat / heating defect (basement). PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM AT CELLAR (BOILER-ROOM) (apt 7), issued 2007-08-16. HPD violation 5273933
311 housing complaints
4 in the last 12 months, 24 in 5 years. Most common: Heat/Hot Water (4).
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. 1 DOB violation 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
10 of 9 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: 10 in 2024, 10 in 2007. Source: DOF tax bills for 2007 and 2024; years with no bill on file are left out.
Owner and management
Owner: 770 UNION STR LTD PARTNERSHIP. Head officer: GEORGE KOTSONIS. Managing agent: KOTSONIS ORGANIZATION LLC.. This owner has 5 buildings on record, 2 graded D or F. See the full portfolio.
Last HPD registration Oct 11, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.
Tax lot and city IDs
BBL 3009570013, HPD building ID 383895. HPD Online, ACRIS, DOB BIS.
Nearest subway
- 7 Av (B, Q), 6 min walk
- Grand Army Plaza (2, 3), 7 min walk
- Union St (R), 7 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 28 open (9 class C, 17 class B, 2 class A). 5 rent-impairing | −45 |
| 311 housing complaints (12 mo) | 4 | −14 |
| 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.