493 recorded events, 1970–2026, from 17 city data systems. The city's paper trail here is mostly 275 311 service requests, 60 ACRIS deeds & mortgages, 52 HPD complaints.
Full record, year by year Support this site
A modest record — below the level that usually signals systemic problems. More recorded distress than 78% of 6-24-unit residential buildings citywide. The citywide median for 6-24-unit residential buildings is 16.3 penalty points per 10 units; this building carries 73.3. In ZIP 11238, 51% of residential buildings hold an A and 10% grade D or F. How grades work
Among 46,798 6-24-unit residential buildings citywide · left is less recorded distress, right is more
| Open HPD violations | 7 total — 1 class C (immediately hazardous), 3 class B, 3 class A. Oldest open since 2022-04-15. |
status snapshot refreshed weekly from HPD records
20 heat or hot-water complaints in the last three years (winter 2025–26: 10 · winter 2026–27: 8). Repeated winter clusters suggest a chronic heating problem.
No bedbug-infested units reported in the last three years of filings.
$5,000 in enforcement penalties imposed (ECB/OATH) in the last three years.
60 service requests in the last three years. Most common: Illegal Parking (22) · Blocked Driveway (14) · HEAT/HOT WATER (10) · Noise (4) · Snow or Ice (2) · For Hire Vehicle Complaint (2).
$40,000 in permitted construction work filed since 2016 (1 filings with a declared cost) — a rough measure of how actively the owner maintains the building. Permit costs cover filed construction work only — they do not capture routine maintenance or repairs done without a permit.
| Yes | Built before 1974 (1931) |
| Yes | Six or more residential units (6) |
| Yes | 421-a / J-51 tax benefit on the current tax roll |
3 of 3 signals present. Buildings receiving 421-a or J-51 benefits are generally required to register their units as rent-stabilized for the duration of the benefit. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | PROSPECT AFFORDABLE PACKAGE LLC |
| Head officer | MATTHEW KELLER |
| Managing agent | NIEUW AMSTERDAM PROPERTY MANAGEMENT |
| Last registered | 2025-06-30 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $2,553,000 | $1,148,850 |
| 2026 | $2,042,000 | $918,900 |
| 2027 | $1,867,000 | $840,150 |
The city's market estimate has fallen 27% between tax years 2025 and 2027.
Tax exemptions on the roll: J51
Not in the FEMA 1%-annual-chance floodplain (2015 preliminary maps).
Not in a hurricane evacuation zone.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
4 street-flooding or sewer-backup complaints at this address since 2017 (0 in the last three years).
Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.
| Subway | Park Pl — S · 0.2 mi straight-line (about a 6-minute walk) · station accessibility: full Franklin Av — C S · 0.3 mi straight-line (about a 7-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: Classon Av / Bergen St — B48 · 150 ft |
| Citi Bike | Pacific St & Classon Ave · 350 ft · station location as of 2026-09-23; live availability |
| Bike facility | Painted bike lane mapped within 75 ft |
| School zones (2024–25 map) | Elementary: Brooklyn Arts and Science Elementary School Middle: Ebbets Field Middle School. Confirm with the DOE's school search. |
Distances are straight-line, not walking routes. Transit locations from the MTA and Citi Bike, bike facilities from NYC DOT, school zones from the DOE's 2024–25 maps.
634 Classon Avenue
| Heat or hot water | Heat or hot water |
| Apartment maintenance | Apartment maintenance |
| Bed bugs | Bed bugs |
| Residential pests | Residential pests |
| Rats or mice | Rats or mice |
| Anything else | Anything else |
60 311 service requests from this address in the last three years — 10 of them about heat or hot water.
311 will ask for the address, the apartment if the problem is inside, and what's wrong. Contact details are optional for most complaints; food-poisoning reports can be anonymous. Complaints appear in the city's public 311 data, usually within a day or two, and then in the Live from 311 box on this page.
Managed by NIEUW AMSTERDAM PROPERTY MANAGEMENT — 194 buildings, 6,794 units. Grades across the portfolio: A6 · B43 · C72 · D58 · F15. See the whole portfolio
showing 60 of 194 buildings
Most recent mortgage recorded against this lot: $3,300,000 on 2021-11-12 (lender: Sterling National Bank), covering 14 lots — the amount covers all of them. Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2024-12-09 | Agreement $91,230,000 — from BRIARWOOD AFFORDABLE LLC; HP MJM HOUSING DEVELOPMENT FUND COMPANY,; HP BRIARWOOD HOUSING D to GOLDMAN SACHS BANK USA | $91,230,000 | |
| 2021-11-12 | AL&R $21,000,000 — from HP MJM HOUSING DEVELOPMENT FUND COMPANY,; PROSPECT AFFORDABLE PACKAGE LLC to STERLING NATIONAL BANK | $21,000,000 | |
| 2021-11-12 | Agreement $21,000,000 — from PROSPECT AFFORDABLE PACKAGE LLC; HP MJM HOUSING DEVELOPMENT FUND COMPANY, to STERLING NATIONAL BANK | $21,000,000 | |
| 2021-11-12 | Mortgage $3,300,000 — from PROSPECT AFFORDABLE PACKAGE LLC; HP MJM HOUSING DEVELOPMENT FUND COMPANY, to STERLING NATIONAL BANK | $3,300,000 | |
| 2021-07-27 | Mortgage $798,802 — from PROSPECT AFFORDABLE PACKAGE LLC; HP MJM HOUSING DEVELOPMENT FUND COMPANY, to ROCKROSE LLC | $798,802 | |
| 2021-07-27 | Deed $22,072,796 — from 1020 PACIFIC LLC; 667 CLASSON LLC; 634 CLASSON LLC; 649-651 CLASSON LLC; 818 BERGEN LLC; 6 to PROSPECT AFFORDABLE PACKAGE LLC; HP MJM HOUSING DEVELOPMENT FUND COMPANY, | $22,072,796 | |
| 2021-07-27 | Agreement $17,700,000 — from PROSPECT AFFORDABLE PACKAGE LLC; HP MJM HOUSING DEVELOPMENT FUND COMPANY, to ROCKROSE LLC | $17,700,000 | |
| 2021-06-24 | Sold for $22,072,796 | $22,072,796 | $3,678,799 |
| 2016-12-05 | AL&R $18,500,000 — from 663 CLASSON LLC; 634 CLASSON LLC; 489 ST MARKS LLC; 818 BERGEN LLC; 808 BERGEN LLC; 667 CL to COSTOMERS BANK | $18,500,000 | |
| 2016-12-05 | Agreement $18,500,000 — from 1020 PACIFIC LLC; 592 FRANKLIN LLC; 667 CLASSON LLC; 483 ST MARKS LLC; 634 CLASSON LLC; 48 to COSTOMERS BANK | $18,500,000 | |
| 2016-12-05 | Mortgage $8,833,842 — from 649-651 CLASSON LLC; 489 ST MARKS LLC; 634 CLASSON LLC; 515 ST MARKS LLC; 818 BERGEN LLC; to COSTOMERS BANK | $8,833,842 | |
| 2014-05-06 | AL&R $10,200,000 — from 808 BERGEN LLC; 592 FRANKLIN LLC; 489 ST MARKS LLC; 872 BERGEN LLC; 634 CLASSON LLC; 1063 to CAPITAL ONE NATIONAL ASSOCIATION | $10,200,000 | |
| 2014-05-06 | Agreement $10,200,000 — from 1063 PACIFIC LLC; 667 CLASSON LLC; 643 FRANKLIN LLC; 489 ST MARKS LLC; 663 CLASSON LLC; 81 to CAPITAL ONE NATIONAL ASSOCIATION | $10,200,000 | |
| 2014-05-06 | Deed $16,000,000 — from CLASSON VILLAGE, L.P to 872 BERGEN LLC; 643 FRANKLIN LLC; 634 CLASSON LLC; 483 ST MARKS LLC; 818 BERGEN LLC; 1063 | $16,000,000 | |
| 2014-05-06 | Mortgage $3,300,000 — from 872 BERGEN LLC; 663 CLASSON LLC; 643 FRANKLIN LLC; 634 CLASSON LLC; 818 BERGEN LLC; 483 ST to CAPITAL ONE NATIONAL ASSOCIATION | $3,300,000 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 1 | 1 | 26 | 0 | 1 | 29 |
| 2018 | 0 | 1 | 102 | 0 | 1 | 104 |
| 2019 | 0 | 0 | 22 | 0 | 1 | 23 |
| 2020 | 0 | 0 | 10 | 0 | 1 | 11 |
| 2021 | 0 | 7 | 16 | 21 | 1 | 45 |
| 2022 | 0 | 4 | 18 | 1 | 1 | 24 |
| 2023 | 0 | 12 | 39 | 1 | 2 | 54 |
| 2024 | 0 | 1 | 27 | 3 | 2 | 33 |
| 2025 | 0 | 2 | 22 | 2 | 4 | 30 |
| 2026 | 0 | 3 | 29 | 0 | 1 | 33 |
Every one of the 493 recorded events, 1970–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 11238 · Landlord rankings · How grades work · The map · The Mice Map