420 Carroll Street
420 Carroll Street in Carroll Gardens, Brooklyn, has 2 open HPD violations, and 354 of 360 units are rent-stabilized, as of Oct 24, 2026. StreetSpy grade: A (93/100).
Mixed residential & commercial · 360 units · Built 2022
StreetSpy grade: A (Excellent, 93/100)
- 2 open housing violations, none in the most serious class.
- 5 heat or hot water complaints to 311 in the last 12 months.
- The head officer on this registration is named on 7 buildings' registrations; 2 graded D or F.
- 354 of 360 units are rent-stabilized.
Fewer open violations per unit than 7 in 10 Brooklyn buildings this size.
- Repairs: Low (2 open), records as of Oct 24, 2026
- Heat and hot water: 5 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
Housing code violations (HPD)
2 open violations: 0 class C (immediately hazardous), 2 class B, 0 class A. 0 issued in the last 12 months. 21 on record. Newest violation issued 2025-06-27.
0 closed in the last 90 days. Median 283 days from issue to close for the 17 violations closed in the last 12 months.
- Class B: Leak or water damage, ceiling, 1st room from the north, 7th floor. , 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT CEILING IN THE 1st ROOM FROM NORTH AT EAST LOCATED AT APT E716, 7th STORY, 3rd APARTMENT FROM NORTH AT EAST , SECTION AT EAST (apt E716). HPD violation 19286084
- Class B: Damaged plaster or paint, ceiling, 1st room from the north, 7th floor. REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR THE CEILING IN THE 1st ROOM FROM NORTH AT EAST LOCATED AT APT E716, 7th STORY, 3rd APARTMENT FROM NORTH AT EAST , SECTION AT EAST (apt E716). HPD violation 19286085
311 housing complaints
13 in the last 12 months, 17 in 5 years. Most common: Heat/Hot Water (5), Door/Window (2), Plumbing (2), Unsanitary Condition (2), Water Leak (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: 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)
No open DOB violations. 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
354 of 360 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).
Owner and management
Owner: 420 Carroll LLC. Head officer: MATTHEW SCHWARTZ. Managing agent: AD DIVERSIFIED MANAGEMENT LLC. This owner has 7 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 3004530001, HPD building ID 1000973. HPD Online, ACRIS, DOB BIS.
Nearest subway
- Union St (R), 6 min walk
- Carroll St (F, G), 8 min walk
- 4 Av-9 St (R), 9 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 2 open (2 class B) | −4 |
| 311 housing complaints (12 mo) | 13 | −3 |
| Bedbug reports (3 yr) | None reported | 0 |
| Executed evictions (3 yr) | None | 0 |
| Housing litigation | No open cases | 0 |
| Open DOB violations | None | 0 |
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.