633 Union Street

633 Union Street in Carroll Gardens, Brooklyn, has 5 open HPD violations, 2 of them class C, and 1 of 8 units is rent-stabilized, as of Oct 24, 2026. StreetSpy grade: D (53/100).

Multi-family walk-up · 8 units · Built 1931

StreetSpy grade: D (Poor, 53/100)

• 2 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
• The head officer on this registration is named on 7 buildings' registrations; 7 graded D or F.
• The owner's bedbug filings report no infested units in the last 3 years.
• 1 of 8 units are rent-stabilized; 8 on the 2007 tax bill.

More open violations per unit than 5 in 10 Brooklyn buildings this size.

• Repairs: Medium (5 open, 2 class C), records as of Oct 24, 2026
• Heat and hot water: 2 complaints, 12 mo, records as of Oct 23, 2026
• Pests: Clear (Owner reported none, 3 yr), records as of Oct 26, 2026
• Safety: Clear (No open DOB violations), records as of Oct 23, 2026
• Registration: Renewal not yet in city data, records as of Oct 3, 2026

How the grade works

Housing code violations (HPD)

5 open violations: 2 class C (immediately hazardous), 2 class B, 1 class A. 4 issued in the last 12 months. 94 on record. Oldest open violation issued 2017-08-14. Newest violation issued 2026-02-23.

0 closed in the last 90 days. Median 110 days from issue to close for the 3 violations closed in the last 12 months.

• Class C: & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF SCALDING HOTWATER ABOVE 130 DEGREES IN THE ENTIRE APARTMENT LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM NORTH AT EAST (apt 2R), issued 2026-02-23. HPD violation 18660618
• Class C: Self-closing door not working, 2nd floor. , 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 FRAME IN THE ENTRANCE LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM NORTH AT EAST (apt 2R), issued 2026-02-23. HPD violation 18660619
• Class B: Fire escape defect, 4th room from the north, 2nd floor. & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF A LOCKABLE KNOB ON THE DOOR TO THE ROOM WITH THE FIRE ESCAPE WINDOW IN THE 4th ROOM FROM NORTH AT WEST LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM NORTH AT EAST (apt 2R), issued 2017-12-06. HPD violation 12126096
• Class B: Floor or stair defect, 2nd room from the north, 1st floor. PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE SLOPING WOOD FLOOR IN THE 2nd ROOM FROM NORTH LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM NORTH AT EAST (apt 1R), issued 2017-08-14. HPD violation 11915624
• Class A: Damaged plaster or paint (hallway). ADMIN. CODE: POST AND MAINTAIN A PROPER NOTICE ON WALL OF THE ENTRANCE STORY IN ENGLISH AND SPANISH ON THE AVAILABILITY OF THE AGENCYS HOUSING INFORMATION GUIDE. A SAMPLE NOTICE CAN BE FOUND AT WWW.NYC.GOV/HPD. AT PUBLIC HALL, 1st STORY, issued 2017-09-28. HPD violation 11983995

311 housing complaints

5 in the last 12 months, 5 in 5 years. Most common: Heat/Hot Water (2), Plumbing (2), Unsanitary Condition (1).

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

1 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: 1 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: ADDA 633 UNION ST LLC. Head officer: ERIC NACHIMOVSKY. Managing agent: Myriam Nachimovsky. This owner has 7 buildings on record, 7 graded D or F. See the full portfolio.

Last HPD registration Aug 28, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.

Tax lot and city IDs

BBL 3004340056, HPD building ID 383772. HPD Online, ACRIS, DOB BIS.

Nearest subway

• Union St (R), 1 min walk
• Atlantic Av-Barclays Ctr (D, N, R), 9 min walk
• Bergen St (2, 3), 10 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 2026-10-27.