320 Prospect Avenue
320 Prospect Avenue in Windsor Terrace, Brooklyn, has 5 open HPD violations, 1 of them class C, and no rent-stabilized units are on its tax bill, as of Oct 25, 2026. StreetSpy grade: D (63/100).
Multi-family walk-up · 6 units · Built 1931
StreetSpy grade: D (Poor, 63/100)
- 1 immediately hazardous violation open (the class that covers no heat, pests, lead paint and similar).
- 2 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a.
- No 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 5 in 10 Brooklyn buildings this size.
- Repairs: High (5 open, 1 class C), records as of Oct 25, 2026
- Heat and hot water: No complaints, 12 mo, records as of Oct 25, 2026
- Pests: Clear (Owner reported none, 3 yr), records as of Oct 27, 2026
- Safety: High (3 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)
5 open violations: 1 class C (immediately hazardous), 2 class B, 2 class A. 1 issued in the last 12 months. 18 on record. Oldest open violation issued 2009-08-13. Newest violation issued 2026-05-05.
HPD recorded no violation closed here in the last 12 months.
2 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: Damaged plaster or paint (basement). MAKE SAFE BY PROPERLY REPAIRING THE STRUCTURAL DEFECT WOOD MAIN SUPPORT BEAM 4 X 6 X 8 ROTTED AND SAGGING CEILING CELLAR REAR ER1 DOB 3042259, issued 2009-08-13. HPD violation 1888050
- Class B: Door, lock or intercom defect (basement). SECTION 242 M/D LAW PROVIDE UNDER COMPLETED PERMIT,A PROPER ENCLOSURE WITH FIREPROOF SELFCLOSING DOORS AND ASSEMBLIES,AT THE TOP AND THE BOTTOM OF THE CELLAR STAIRS, CENTER, issued 2009-08-13. HPD violation 1888122
- Class B: Self-closing door not working (entrance). ARRANGE AND MAKE SELF-CLOSING THE DOORS ENTRANCE TO 2 STY EAST APT 2L. , SECTION '' '' (apt 2L), issued 2009-08-13. HPD violation 1887954
- 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 2026-05-05. HPD violation 18882935
- Class A: Damaged plaster or paint. REPLACE WITH NEW THE MISSING AIR VENT COVER WALL FRONT OF BUILDING., issued 2009-08-13. HPD violation 1888076
311 housing complaints
0 in the last 12 months, 0 in 5 years.
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: No bedbug filing on record for this year
- 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: Owner reported 0 infested units
Buildings department (DOB)
3 open DOB violations, 1 of them Local Law violations issued before 2000. 8 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: 320 PROSPECT AVE LLC. Head officer: KOSTAS STOUPAKIS. Managing agent: KOSTAS STOUPAKIS. See the full portfolio.
Last HPD registration Apr 23, 2026. Registration on file through Sep 1, 2026; renewal not yet in the city's data.
Tax lot and city IDs
BBL 3008680009, HPD building ID 356155. HPD Online, ACRIS, DOB BIS.
Nearest subway
- Prospect Av (R), 7 min walk
- 15 St-Prospect Park (F, G), 9 min walk
- 7 Av (F, G), 10 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 5 open (1 class C, 2 class B, 2 class A). 2 rent-impairing | −32 |
| 311 housing complaints (12 mo) | None | 0 |
| Bedbug reports (3 yr) | None reported | 0 |
| Executed evictions (3 yr) | None | 0 |
| Housing litigation | No open cases | 0 |
| Open DOB violations | 3 open DOB violations, 1 of them Local Law violations issued before 2000 | −5 |
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.