91 6th Avenue

91 6th Avenue in Prospect Heights, Brooklyn, has 27 open HPD violations, and no rent-stabilized units are on its tax bill, as of Oct 26, 2026. StreetSpy grade: D (55/100).

Co-op · Multi-family walk-up · 4 units · Built 1874

A cooperative: apartments are owned as shares, so a rental here is a sublet that usually needs board approval and may be limited to one or two years. Co-op units are not rent-stabilized.

StreetSpy grade: D (Poor, 55/100)

• 27 open housing violations, none in the most serious class.
• 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.
• A co-op: renting here is a sublet, usually with board approval and a time limit; units are not rent-stabilized.

• Repairs: High (27 open), records as of Oct 26, 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 28, 2026
• Safety: Clear (No open DOB violations), records as of Oct 26, 2026
• Registration: Expired Oct 1, 2009, records as of Oct 3, 2026

How the grade works

Housing code violations (HPD)

27 open violations: 0 class C (immediately hazardous), 7 class B, 8 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. 27 on record. Oldest open violation issued 2008-06-24. Newest violation issued 2026-04-30.

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 B: Items blocking a hallway or exit (hallway). D26-10.01, 10.05 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF HOUSEHOLD ITEMS SCUTTLE LADDER ENCLOSURE 3 STY PUBLIC HALL., issued 2008-06-24. HPD violation 965246
• Class B: Roof defect (hallway). D26-10.01, 10.05 ADM CODE FIRE EGRESS DEFECTIVE. MAKE STATIONARY THE IRON LADDER LEADING TO SCUTTLE OPENING IN ROOF 3 STY PUBLIC HALL., issued 2008-06-24. HPD violation 965247
• Class B: Lighting defect (entrance). D26-19.07 ADM CODE 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 50 WATTS NIGHT INSPECTION., issued 2008-06-24. HPD violation 965245
• Class B: Door, lock or intercom defect (basement). D26-10.01 ADM CODE REMOVE ILLEGAL FASTENINGS FROM GRATING DOOR TO OUTSIDE CELLAR ENTRANCE REAR., issued 2008-06-24. HPD violation 965240
• Class B: Broken window or sash (basement). D26-10.01, 10.05 ADM CODE FIRE EGRESS DEFECTIVE. REMOVE OBSTRUCTING BARS OR UNLAWFUL GATES FROM AT LEAST 1 WINDOW OR PROVIDE APPROVED TYPE GATE BASEMENT APT., issued 2008-06-24. HPD violation 965241
• Class B: Roof defect (roof). D26-10.01, 10.05 ADM CODE FIRE EGRESS DEFECTIVE. MAKE STATIONARY THE IRON LADDER LEADING TO SCUTTLE OPENING IN ROOF 4 STY PUB HALL., issued 2008-06-24. HPD violation 965242
• Class B: Sprinkler or standpipe defect (basement). D26-21.07 ADM CODE SEAL IN OPEN POSITION THE O.S.Y. VALVE OF THE SPRINKLER SYSTEM IN ACCORDANCE WITH THE RULES AND REGULATIONS OF THIS DEPARTMENT CELLAR FRONT., issued 2008-06-24. HPD violation 965244
• 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 2026-04-30. HPD violation 18846934

311 housing complaints

0 in the last 12 months, 1 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)

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

No rent-stabilized units on the tax bill.

Owner and management

Owner: 91 SIXTH AVE CORPORATION. Head officer: DAVID WALLENSTEIN. Managing agent: DAVID WALLENSTEIN. See the full portfolio.

Last HPD registration Dec 30, 2008. HPD registration expired Oct 1, 2009 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 3009360003, HPD building ID 132726. HPD Online, ACRIS, DOB BIS.

Nearest subway

• Bergen St (2, 3), 2 min walk
• 7 Av (B, Q), 4 min walk
• Grand Army Plaza (2, 3), 7 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.