116 recorded events, 1969–2026, from 15 city data systems. The city's paper trail here is mostly 35 311 service requests, 21 ACRIS deeds & mortgages, 12 HPD housing violations.
Full record, year by year Support this site
A modest record — below the level that usually signals systemic problems. More recorded distress than 68% 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 40.3. In ZIP 11101, 70% of residential buildings hold an A and 5% 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 | 1 total — 1 class C (immediately hazardous), 0 class B, 0 class A. Oldest open since 2026-08-19. |
status snapshot refreshed weekly from HPD records
No heat or hot-water complaints in the last three years.
No bedbug-infested units reported in the last three years of filings.
13 service requests in the last three years. Most common: Rodent (4) · UNSANITARY CONDITION (2) · New Tree Request (1) · Water System (1) · Illegal Parking (1) · Dirty Condition (1).
$412,000 in permitted construction work filed since 2016 (6 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) |
| No | 421-a / J-51 tax benefit on the current tax roll |
2 of 3 signals present. This is the classic profile of a rent-stabilized building (pre-1974, 6+ units) — many units in such buildings remain stabilized. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | FIFTY ONE AVENUE LLC |
| Head officer | GREGORY Alsaad |
| Managing agent | BLOCK MANAGEMENT INC |
| Last registered | 2026-06-25 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $1,380,000 | $621,000 |
| 2026 | $1,547,000 | $696,150 |
| 2027 | $1,377,000 | $619,650 |
The city's market estimate has risen 0% between tax years 2025 and 2027.
| Heating fuel | NO2FUEL |
In the FEMA 1%-annual-chance floodplain (2015 preliminary flood maps) — lenders typically require flood insurance here.
Hurricane evacuation zone 2 of 6 — zone 1 evacuates first.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
No street-flooding or sewer-backup complaints on record at this address.
Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.
| Subway | Vernon Blvd-Jackson Av — 7 · 350 ft straight-line (about a 2-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: Borden Av / 5 St — Q101 Q103 · 400 ft |
| Citi Bike | Vernon Blvd & 50 Ave · 350 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S./I.S. 78Q Middle: I.S. 204 Oliver W. Holmes. 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.
5-42 51 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 |
13 311 service requests from this address in the last three years.
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 BLOCK MANAGEMENT INC — 32 buildings, 726 units. Grades across the portfolio: A20 · B9 · C3. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 31-90 29th Street | QN | 92 | A |
| 31-35 31 Street | QN | 81 | A |
| 43-41 52 Street | QN | 66 | A |
| 31-01 Vernon Boulevard | QN | 64 | A |
| 30-40 21 Street | QN | 62 | A |
| 3058 Godwin Terrace | BX | 42 | A |
| 227 West 11 Street | MN | 28 | A |
| 32-73 42 Street | QN | 24 | B |
| 25-77 31st Street | QN | 23 | A |
| 32-78 Steinway Street | QN | 22 | A |
| 32-22 41 Street | QN | 20 | A |
| 32-26 41 Street | QN | 20 | B |
| 43-06 164 Street | QN | 19 | B |
| 105 Eldridge Street | MN | 18 | A |
| 85 Audubon Avenue | MN | 18 | B |
| 21-71 27 Street | QN | 16 | A |
| 14-34 31 Avenue | QN | 14 | A |
| 26-14 28 Street | QN | 11 | A |
| 24-29 28 Street | QN | 9 | A |
| 38-01 31 Avenue | QN | 9 | A |
| 24-39 28 Street | QN | 9 | A |
| 1420 DeKalb Avenue | BK | 6 | C |
| 2026 2 Avenue | MN | 6 | B |
| 2036 2 Avenue | MN | 6 | C |
| 32-06 82 Street | QN | 6 | A |
| 2024 2 Avenue | MN | 6 | B |
| 2028 2 Avenue | MN | 6 | B |
| 5-42 51 Avenue | QN | 6 | B |
| 35-37 33 Street | QN | 6 | A |
| 34-50 42 Street | QN | 6 | B |
| 21-12 22 Drive | QN | 4 | C |
| 25-05 Steinway Street | QN | 1 | A |
Most recent mortgage recorded against this lot: $103,000 on 2021-03-10 (lender: Popular Bank). Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2026-03-12 | Deed $3,600,000 — from 542 51AVE PROPERTY LLC to FIFTY ONE AVENUE LLC | $3,600,000 | |
| 2026-03-05 | Sold for $3,600,000 | $3,600,000 | $600,000 |
| 2021-03-10 | AL&R $103,000 — from 542 51AVE PROPERTY LLC to POPULAR BANK | $103,000 | |
| 2021-03-10 | Mortgage $103,000 — from 542 51AVE PROPERTY LLC to POPULAR BANK | $103,000 | |
| 2021-03-10 | AL&R $897,000 — from 542 51AVE PROPERTY LLC to POPULAR BANK | $897,000 | |
| 2021-03-10 | Mortgage $897,000 — from 542 51AVE PROPERTY LLC to POPULAR BANK | $897,000 | |
| 2021-03-10 | AL&R $1,500,000 — from 542 51AVE PROPERTY LLC to POPULAR BANK | $1,500,000 | |
| 2021-03-10 | Mortgage $1,500,000 — from 542 51AVE PROPERTY LLC to POPULAR BANK | $1,500,000 | |
| 2021-03-04 | Deed $2,600,000 — from 542 51ST AVE, LLC; 542 51ST AVE, LLC to 542 51AVE PROPERTY, LLC; 542 51AVE PROPERTY, LLC | $2,600,000 | |
| 2021-03-04 | Deed $2,600,000 — from 542 51ST AVE, LLC; 542 51ST AVE, LLC to 542 51AVE PROPERTY, LLC; 542 51AVE PROPERTY, LLC | $2,600,000 | |
| 2021-02-24 | Sold for $2,600,000 | $2,600,000 | $433,333 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2018 | 0 | 0 | 5 | 0 | 1 | 6 |
| 2019 | 0 | 0 | 0 | 0 | 1 | 1 |
| 2020 | 0 | 0 | 3 | 2 | 1 | 6 |
| 2021 | 12 | 0 | 5 | 9 | 0 | 26 |
| 2022 | 0 | 0 | 6 | 0 | 3 | 9 |
| 2023 | 0 | 3 | 9 | 0 | 1 | 13 |
| 2024 | 0 | 0 | 3 | 0 | 0 | 3 |
| 2025 | 0 | 0 | 4 | 0 | 2 | 6 |
| 2026 | 0 | 0 | 14 | 8 | 2 | 24 |
Every one of the 116 recorded events, 1969–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 11101 · Landlord rankings · How grades work · The map · The Mice Map