288 recorded events, 1967–2026, from 14 city data systems. The city's paper trail here is mostly 125 311 service requests, 54 ACRIS deeds & mortgages, 39 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 73% 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 54.4. In ZIP 10471, 90% of residential buildings hold an A and 2% 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 | 21 total — 8 class C (immediately hazardous), 12 class B, 1 class A. Oldest open since 2024-05-15. |
status snapshot refreshed weekly from HPD records
6 heat or hot-water complaints in the last three years (winter 2025–26: 6).
No bedbug-infested units reported in the last three years of filings.
75 service requests in the last three years. Most common: Illegal Parking (30) · Noise (7) · Snow or Ice (6) · WATER LEAK (6) · UNSANITARY CONDITION (5) · Real Time Enforcement (3).
$260,000 in permitted construction work filed since 2016 (2 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 (1972) |
| Yes | Six or more residential units (24) |
| 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) | 5421 SYLVAN LLC |
| Head officer | STEVE ZERVOUDIS |
| Managing agent | ZEE MANAGEMENT GROUP LLC |
| Last registered | 2025-07-08 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $1,616,000 | $727,200 |
| 2026 | $1,771,000 | $796,950 |
| 2027 | $1,690,000 | $760,500 |
The city's market estimate has risen 5% between tax years 2025 and 2027.
| Heating fuel | NATURALGAS |
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.
| Subway | Van Cortlandt Park-242 St — 1 · 0.8 mi straight-line (about a 21-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: Broadway / W 254 St — Bx9 BxM3 · 600 ft |
| Citi Bike | Fieldston Rd & Mosholu Ave · 0.2 mi · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 081 Robert J. Christen Middle: Riverdale / Kingsbridge Academy (Middle School / High School 141). 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.
5431 Sylvan 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 |
75 311 service requests from this address in the last three years — 2 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 ZEE MANAGEMENT GROUP LLC — 19 buildings, 218 units. Grades across the portfolio: A8 · B7 · C2 · D1. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 3415 Knox Place | BX | 25 | A |
| 5431 Sylvan Avenue | BX | 24 | B |
| 3061 Bailey Avenue | BX | 21 | C |
| 1230 Prospect Avenue | BX | 17 | B |
| 3110 Bailey Avenue | BX | 14 | A |
| 3422 Bailey Place | BX | 13 | A |
| 124 St Anns Avenue | BX | 13 | B |
| 433 East 115 Street | MN | 13 | A |
| 341 East 138 Street | BX | 10 | A |
| 300 East 201 Street | BX | 9 | B |
| 361 East 138 Street | BX | 9 | B |
| 311 Alexander Avenue | BX | 9 | A |
| 1349 Commonwealth Avenue | BX | 8 | A |
| 158 East 112 Street | MN | 8 | C |
| 262 Alexander Avenue | BX | 8 | B |
| 12-07 31 Avenue | QN | 7 | D |
| 3160 Albany Crescent | BX | 6 | B |
| 313 Alexander Avenue | BX | 4 | A |
| 154 West 122 Street | MN | 0 | — |
Most recent mortgage recorded against this lot: $1,845,000 on 2023-10-31 (lender: JPMorgan Chase Bank, N.A.). Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2023-10-31 | Deed $3,750,000 — from BOGEE SUPERMARKET INC; SYLVANDALE ASSOCIATES, LLC to 5421 SYLVAN LLC | $3,750,000 | |
| 2023-10-31 | Mortgage $1,845,000 — from 5421 SYLVAN LLC to JPMORGAN CHASE BANK, N.A. | $1,845,000 | |
| 2023-10-26 | Sold for $3,750,000 | $3,750,000 | $156,250 |
| 2015-04-15 | Deed $900,000 — from ENG, GEE PING to BOGEE SUPERMARKET INC | $900,000 | |
| 2013-04-15 | Mortgage $265,878 — from ENG, GEE PING to FIRST NATIONAL BANK OF LONG ISLAND | $265,878 | |
| 2013-04-15 | Agreement $600,000 — from ENG, GEE PING to FIRST NATIONAL BANK OF LONG ISLAND | $600,000 | |
| 2013-04-15 | AL&R $600,000 — from ENG, GEE PING to FIRST NATIONAL BANK OF LONG ISLAND | $600,000 | |
| 2004-01-05 | Mortgage $400,000 — from ENG, GEE PING to INDEPENDENCE COMMUNITY BANK | $400,000 | |
| 1988-03-23 | Mortgage $700,000 — from SYLVANDALE ASSOCIATES to FIVE-FOUR-TWO-ONE ASSOC. | $700,000 | |
| 1985-10-25 | Mortgage $410,000 — from FIVE-FOUR-TWO-ONE ASSOC. to 5421 SYLVAN AVE.ASSOC.,C | $410,000 |
| Year | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|
| 2017 | 0 | 12 | 0 | 2 | 14 |
| 2018 | 1 | 10 | 0 | 0 | 11 |
| 2019 | 0 | 4 | 0 | 1 | 5 |
| 2020 | 0 | 3 | 0 | 1 | 4 |
| 2021 | 1 | 10 | 0 | 2 | 13 |
| 2022 | 0 | 9 | 0 | 1 | 10 |
| 2023 | 4 | 13 | 7 | 1 | 25 |
| 2024 | 5 | 40 | 0 | 1 | 46 |
| 2025 | 1 | 44 | 0 | 1 | 46 |
| 2026 | 0 | 40 | 0 | 1 | 41 |
Every one of the 288 recorded events, 1967–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 10471 · Landlord rankings · How grades work · The map · The Mice Map