634 Classon Avenue

634 Classon Avenue in Crown Heights, Brooklyn, has 7 open HPD violations, 1 of them class C, and 6 of 6 units are rent-stabilized, as of Oct 25, 2026. StreetSpy grade: F (48/100).

City program owner (HDFC) · Mixed residential & commercial · 6 units · Built 1931

Held by a Housing Development Fund Corporation, a nonprofit owner under a city housing program. Its tenants live with the conditions on this record, so it is graded and ranked like any rental. How HDFCs are ranked

StreetSpy grade: F (Severe, 48/100)

• 1 immediately hazardous violation open (the class that covers no heat, pests, lead paint and similar).
• 1 open violation is classified rent-impairing under NY Multiple Dwelling Law section 302-a.
• 10 heat or hot water complaints to 311 in the last 12 months.
• 6 of 6 units are rent-stabilized.

More open violations per unit than 6 in 10 Brooklyn buildings this size.

• Repairs: High (7 open, 1 class C), records as of Oct 25, 2026
• Heat and hot water: 10 complaints, 12 mo, records as of Oct 25, 2026
• Pests: Clear (Owner reported none, 3 yr), 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)

7 open violations: 1 class C (immediately hazardous), 3 class B, 3 class A. 3 issued in the last 12 months. 22 on record. Oldest open violation issued 2022-04-18. Newest violation issued 2026-06-10.

0 closed in the last 90 days. Median 181 days from issue to close for the 1 violations closed in the last 12 months.

1 open violation is classified rent-impairing under NY Multiple Dwelling Law section 302-a. Section 302-a; NY Courts guidance on getting repairs.

• Class C: No hot water, throughout the apartment, 22nd floor. PROVIDE HOT WATER AT ALL HOT WATER FIXTURES IN THE ENTIRE APARTMENT LOCATED AT APT 2B, 22nd STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 2B). HPD violation 19284570
• Class B: Damaged plaster or paint, ceiling. PROPERLY REPAIR THE BROKEN OR DEFECTIVE INOPERATIVE LIGHT FIXTURE AT CEILING AT PUBLIC HALL, 2nd STORY, issued 2022-04-18. HPD violation 15101994
• Class B: Missing or broken smoke / CO detector, throughout the apartment, 2nd floor. REPAIR OR REPLACE THE SMOKE DETECTOR MISSING IN THE ENTIRE APARTMENT LOCATED AT APT 2B, 2nd STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 2B), issued 2022-04-18. HPD violation 15101992
• Class B: Missing or broken smoke / CO detector, throughout the apartment, 2nd floor. HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). MISSING IN THE ENTIRE APARTMENT LOCATED AT APT 2B, 2nd STORY, 1st APARTMENT FROM SOUTH AT WEST (apt 2B), issued 2022-04-18. HPD violation 15101993
• Class A: Fire escape defect. , 187, 231 M/D LAW AND DEPARTMENT RULES AND REGULATIONS. PROVIDE A SHOE PROPERLY SECURED TO BOTTOM OF STRING OF DROPLADDER MISSING AT FIRE ESCAPE AT NORTH, issued 2026-06-10. HPD violation 18985264
• Class A: Required notice or sign missing (entrance). (B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE, issued 2026-06-10. HPD violation 18985263
• Class A: Required notice or sign missing (entrance). (B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONSPICUOUS LOCATION WITHIN THE COMMON AREA AT THE BUILDINGS ENTRANCE. FOR MORE INFORMATION ABOUT SIGNAGE REQUIREMENTS, PLEASE VISIT: HTTPS://WWW.NYC.GOV/SITE/HPD/SERVICES-AND-INFORMATION/REQUIRED-SIGNAGE.PAGE. HPD violation 19285973

311 housing complaints

10 in the last 12 months, 11 in 5 years. Most common: Heat/Hot Water (10).

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: Owner reported 0 infested units
• 2022: Owner reported 0 infested units
• 2021: Owner reported 0 infested units

Buildings department (DOB)

No open DOB violations. 2 DOB violations on record. Check on DOB BIS.

Evictions and housing court

0 executed evictions in the last 3 years (1 on record). 0 open HPD cases; 0 harassment findings.

Rent stabilization

6 of 6 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).

Rent-stabilized units on city tax bills: 6 in 2024, 6 in 2007. Source: DOF tax bills for 2007 and 2024; years with no bill on file are left out.

Owner and management

Owner: PROSPECT AFFORDABLE PACKAGE LLC. Head officer: MATTHEW KELLER. Managing agent: NIEUW AMSTERDAM PROPERTY MANAGEMENT. This owner has 50 buildings on record, 44 graded D or F. See the full portfolio.

Last HPD registration Jun 30, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.

Tax lot and city IDs

BBL 3011410043, HPD building ID 221729. HPD Online, ACRIS, DOB BIS.

Nearest subway

• Franklin Av (S), 5 min walk
• Franklin Av (C), 5 min walk
• Park Pl (S), 5 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 2026-10-27.