646 9th Avenue

646 9th Avenue in Hell's Kitchen, Manhattan, has 2 open HPD violations, and no rent-stabilized units are on its tax bill, as of Oct 25, 2026. StreetSpy grade: C (75/100).

Co-op (HDFC) · Multi-family walk-up · 15 units · Built 1900

A limited-equity co-op held by a Housing Development Fund Corporation: the residents own shares, so a rental here is a sublet that usually needs board approval, and HDFC co-ops often limit sublets and resale prices. Co-op units are not rent-stabilized. How HDFCs are ranked

StreetSpy grade: C (Fair, 75/100)

• 2 open housing violations, none in the most serious class.
• The owner's bedbug filings report 3 infested units over the last 3 years, including re-infestations.
• 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: Low (2 open), records as of Oct 25, 2026
• Heat and hot water: No complaints, 12 mo, records as of Oct 25, 2026
• Pests: High (3 infested units, 3 yr, re-infested), records as of Oct 27, 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)

2 open violations: 0 class C (immediately hazardous), 2 class B, 0 class A. 0 issued in the last 12 months. 7 on record. Oldest open violation issued 2012-05-24. Newest violation issued 2025-06-04.

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

• Class B: Damaged plaster or paint, 1st room from the east, 5th floor. REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR CEILING IN THE 1st ROOM FROM EAST LOCATED AT APT 5FN, 5th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 5FN), issued 2012-05-24. HPD violation 9440792
• Class B: Missing or broken smoke / CO detector, throughout the apartment, 5th floor. HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 5FN, 5th STORY, 1st APARTMENT FROM WEST AT NORTH (apt 5FN), issued 2012-05-24. HPD violation 9440793

311 housing complaints

0 in the last 12 months, 1 in 5 years.

Bedbugs

The owner reported 3 infested units in the last 3 years, including re-infestations. 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 2 infested, 2 treated, 1 re-infested
• 2024: Owner reported 0 infested units
• 2023: Owner reported 1 infested, 1 treated, 0 re-infested
• 2022: No bedbug filing on record for this year
• 2021: Owner reported 0 infested units

Buildings department (DOB)

No open DOB violations. 3 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: AMETHYST WEST HDFC. Head officer: RALPH WESTERHOFF. Managing agent: BRICKWORK MANAGEMENT INC.. See the full portfolio.

Last HPD registration Sep 10, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.

Tax lot and city IDs

BBL 1010360003, HPD building ID 4802. HPD Online, ACRIS, DOB BIS.

Nearest subway

• 42 St-Port Authority Bus Terminal (A, C, E), 4 min walk
• 50 St (C, E), 6 min walk
• 49 St (N, R, W), 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.