660 Carroll Street

660 Carroll Street in Park Slope, Brooklyn, has 43 open HPD violations, 3 of them class C, and no rent-stabilized units are on its tax bill, as of Oct 25, 2026. StreetSpy grade: D (57/100).

Multi-family walk-up · 8 units · Built 1920

StreetSpy grade: D (Poor, 57/100)

• 3 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
• The owner has 2 buildings on record; 2 graded D or F.
• Had 7 rent-stabilized units on the 2007 tax bill and none on the latest one; ask how the apartment left stabilization.

More open violations per unit than 8 in 10 Brooklyn buildings this size.

• Repairs: High (43 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 (No bedbug filing, 3 yr), records as of Oct 27, 2026
• Safety: Medium (2 open DOB violations), records as of Oct 23, 2026
• Registration: Expired May 1, 2011, records as of Oct 3, 2026

How the grade works

Housing code violations (HPD)

43 open violations: 3 class C (immediately hazardous), 3 class B, 25 class A, 12 class I (HPD orders such as lead paint or heat orders, not a hazard class). 1 issued in the last 12 months. 43 on record. Oldest open violation issued 2009-10-01. Newest violation issued 2026-05-04.

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

• Class C: No heat / heating defect (hallway). POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM MISSING INFORMATION AT PUBLIC HALL, 1st STORY, issued 2023-10-05. HPD violation 16284602
• Class C: No heat / heating defect (hallway). POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM MISSING AT PUBLIC HALL, 1st STORY, issued 2023-09-21. HPD violation 16238243
• Class C: Door, lock or intercom defect (entrance). PROPERLY REPAIR THE BROKEN OR DEFECTIVE LOCK ON DOOR AT VESTIBULE , 1st STORY, issued 2018-03-22. HPD violation 12297229
• Class B: Missing or broken smoke / CO detector (hallway). HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). MISSING AT PUBLIC HALL, 1st STORY, issued 2023-09-21. HPD violation 16238240
• Class B: Missing or broken smoke / CO detector, 3rd floor. SECTION 27-2046.1, 2046.2 HMC: PROVIDE AN APPROVED AND OPERATIONAL CARBON MONOXIDE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH APPLICABLE LAW AND RULES. LOCATED AT APT 3R, 3rd STORY, 2nd APARTMENT FROM EAST AT SOUTH (apt 3R), issued 2011-12-19. HPD violation 9252187
• Class B: Lighting defect (entrance). PROVIDE ADEQUATE LIGHTING AT OR NEAR THE OUTSIDE OF THE FRONT ENTRANCEWAY OF THE BUILDING AND KEEP SAME BURNING FROM SUNSET EVERY DAY TO SUNRISE ON THE DAY FOLLOWING 200 WATTS REQUIRED, issued 2009-10-01. HPD violation 4548049
• Class A: Bedbugs. (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS., issued 2026-05-04. HPD violation 18868271
• Class A: Bedbugs. (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS., issued 2025-06-09. HPD violation 17983428

311 housing complaints

0 in the last 12 months, 4 in 5 years.

Bedbugs

No bedbug filing on record for the last 3 years. 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: No bedbug filing on record for this year
• 2024: No bedbug filing on record for this year
• 2023: No bedbug filing on record for this year
• 2022: No bedbug filing on record for this year
• 2021: No bedbug filing on record for this year

Buildings department (DOB)

2 open DOB violations, 1 of them Local Law violations issued before 2000. 2 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: 660 REALTY LLC. Head officer: MABEL MACKEY. Managing agent: 660 RELATY LLC. This owner has 2 buildings on record, 2 graded D or F. See the full portfolio.

Last HPD registration Aug 26, 2010. HPD registration expired May 1, 2011 and had not been renewed as of Oct 3, 2026. Buildings with 3+ units must register with HPD every year.

Tax lot and city IDs

BBL 3009620018, HPD building ID 218041. HPD Online, ACRIS, DOB BIS.

Nearest subway

• Union St (R), 5 min walk
• 7 Av (B, Q), 9 min walk
• 4 Av-9 St (R), 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 2026-10-28.