297 recorded events, 1969–2025, from 15 city data systems. The city's paper trail here is mostly 62 311 service requests, 61 HPD complaints, 43 HPD housing violations.
Full record, year by year Support this site
The city's published records show little recorded distress here in the last three years. Less recorded distress than 86% 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 1.4. In ZIP 10017, 83% 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
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.
No 311 service requests from this address in the last three years.
$280,000 in permitted construction work filed since 2016 (4 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 (1921) |
| Yes | Six or more residential units (7) |
| 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) | 423 MADISON AVENUE L.L.C. |
| Head officer | JANE GOLDLMAN |
| Managing agent | MICHELLE CORVINO |
| Last registered | 2025-07-03 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $4,754,400 | $2,139,480 |
| 2026 | $5,071,000 | $2,281,950 |
| 2027 | $6,085,000 | $2,738,250 |
The city's market estimate has risen 28% between tax years 2025 and 2027.
| Restaurant | Cuisine | Grade | Notes |
|---|---|---|---|
| Delbianco | Italian | A | — |
Report to 311: Food poisoning · Food safety complaint
1 restaurant · 0 with mice evidence · See them on the Mice Map
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 | 51 St — 6 E F · 950 ft straight-line (about a 5-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: Madison Av / E 49 St — M3 M4 · 200 ft |
| Citi Bike | E 50 St & Park Ave · 500 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 059 Beekman Hill International Middle: J.H.S. 104 Simon Baruch. 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.
423 Madison 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 |
| Food poisoning | Food poisoning |
| Food safety complaint | Food safety complaint |
| Anything else | Anything else |
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.
| Year | Construction | Enforcement | Housing & tenants | Health & systems | Total |
|---|---|---|---|---|---|
| 2017 | 0 | 1 | 2 | 0 | 3 |
| 2018 | 0 | 0 | 0 | 0 | 0 |
| 2019 | 0 | 1 | 4 | 0 | 5 |
| 2020 | 0 | 0 | 0 | 0 | 0 |
| 2021 | 0 | 0 | 2 | 0 | 2 |
| 2022 | 4 | 2 | 18 | 0 | 24 |
| 2023 | 6 | 2 | 3 | 0 | 11 |
| 2024 | 0 | 2 | 0 | 1 | 3 |
| 2025 | 0 | 0 | 3 | 1 | 4 |
| 2026 | 0 | 0 | 0 | 0 | 0 |
Every one of the 297 recorded events, 1969–2025, is laid out year by year in the full report (print-ready).
Explore: ZIP 10017 · Landlord rankings · How grades work · The map · The Mice Map