64 recorded events, 2000–2026, from 6 city data systems. The city's paper trail here is mostly 50 311 service requests, 4 DOB complaints, 3 ACRIS deeds & mortgages.
Full record, year by year Support this site
A sustained record of distress well beyond its peers. More recorded distress than 97% of 1-5-unit residential buildings citywide. The citywide median for 1-5-unit residential buildings is 0 penalty points per 10 units; this building carries 73.3. In ZIP 10303, 87% of residential buildings hold an A and 4% grade D or F. How grades work
Among 699,345 1-5-unit residential buildings citywide · left is less recorded distress, right is more
No current HPD flags in the latest weekly snapshot: no open violations, no pending litigation, no active vacate orders, and not in the Alternative Enforcement Program.
No heat or hot-water complaints in the last three years.
No bedbug-infested units reported in the last three years of filings.
$37,500 in enforcement penalties imposed (ECB/OATH) in the last three years.
39 service requests in the last three years. Most common: Noise (38) · General Construction/Plumbing (1).
No permitted work with a declared cost filed in the last decade. Permit costs cover filed construction work only — they do not capture routine maintenance or repairs done without a permit.
| Yes | Built before 1974 (1899) |
| No | Six or more residential units (2) |
| No | 421-a / J-51 tax benefit on the current tax roll |
1 of 3 signals present. Only a partial profile — stabilization is possible but less likely. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | 21 LEYDEN AVENUE VENTURES LLC |
| Head officer | GARY GRINBERG |
| Managing agent | Richmond County Management LLC |
| Last registered | 2026-06-04 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $437,000 | $26,220 |
| 2026 | $535,000 | $32,100 |
| 2027 | $582,000 | $34,920 |
The city's market estimate has risen 33% between tax years 2025 and 2027.
Tax exemptions on the roll: COLD WAR VETERAN - DISABILITY
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.
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.
| Bus | Nearest boarding stop: Union Av / Brabant St — S46 S96 · 550 ft |
| School zones (2024–25 map) | Elementary: P.S. 044 Thomas C. Brown Middle: I.S. 051 Edwin Markham. 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.
21 Leyden 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 |
39 311 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 RICHMOND COUNTY MANAGEMENT LLC — 33 buildings, 58 units. Grades across the portfolio: A12 · B5 · C3 · D7 · F5. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 148 Corson Avenue | SI | 4 | F |
| 663 Bay Street | SI | 4 | F |
| 296 St Marks Place | SI | 3 | F |
| 992 Lenox Road | BK | 3 | D |
| 298 St Marks Place | SI | 3 | F |
| 390 St Marks Place | SI | 2 | D |
| 31 Newark Avenue | SI | 2 | A |
| 170 Maple Parkway | SI | 2 | A |
| 243 Lockman Avenue | SI | 2 | B |
| 79 Clark Lane | SI | 2 | A |
| 29 Newark Avenue | SI | 2 | B |
| 140 Winter Avenue | SI | 2 | A |
| 119 Campbell Avenue | SI | 2 | F |
| 155 Woodcutters Lane | SI | 2 | B |
| 35E Langere Place | SI | 2 | C |
| 124 Alaska Street | SI | 2 | A |
| 21 Leyden Avenue | SI | 2 | D |
| 174 Pine Place | SI | 2 | C |
| 793 Delafield Avenue | SI | 2 | A |
| 168 Continental Place | SI | 1 | B |
| 20 Eldridge Avenue | SI | 1 | A |
| 205 Park Avenue | SI | 1 | A |
| 116 Hillside Avenue | SI | 1 | D |
| 72 Holland Avenue | SI | 1 | A |
| 141 Roff Street | SI | 1 | A |
| 44 Prince Street | SI | 1 | C |
| 83 Pelton Avenue | SI | 1 | D |
| 108 Holland Avenue | SI | 1 | A |
| 69 Scribner Avenue | SI | 1 | D |
| 329 Union Avenue | SI | 1 | B |
| 3445 Richmond Road | SI | 1 | A |
| 3B Ludwig Lane | SI | 1 | D |
| 950 Van Duzer Street | SI | 0 | — |
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2025-03-26 | RPTT $375,000 — from DONALD J. TRAYNOR IRREVOCABLE TRUST DATE; MARIE A. FERRANTE, TRUSTEE to 21 LEYDEN AVENUE VENTURES LLC | $375,000 | |
| 2024-11-26 | Sold for $375,000 | $375,000 | $187,500 |
| Year | Enforcement | Housing & tenants | Ownership & money | Total |
|---|---|---|---|---|
| 2017 | 0 | 2 | 0 | 2 |
| 2018 | 0 | 0 | 0 | 0 |
| 2019 | 0 | 1 | 0 | 1 |
| 2020 | 0 | 0 | 0 | 0 |
| 2021 | 0 | 0 | 0 | 0 |
| 2022 | 0 | 1 | 0 | 1 |
| 2023 | 0 | 0 | 0 | 0 |
| 2024 | 7 | 1 | 3 | 11 |
| 2025 | 0 | 15 | 1 | 16 |
| 2026 | 0 | 23 | 0 | 23 |
Every one of the 64 recorded events, 2000–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 10303 · Landlord rankings · How grades work · The map · The Mice Map