164 recorded events, 1967–2026, from 15 city data systems. The city's paper trail here is mostly 29 DOB violations, 22 DOB job filings, 21 DOB permits.
Full record, year by year Support this site
A sustained record of distress well beyond its peers. More recorded distress than 98% 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 106.7. In ZIP 10021, 81% of residential buildings hold an A and 3% 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.
$14,900 in enforcement penalties imposed (ECB/OATH) in the last three years.
4 service requests in the last three years. Most common: General Construction/Plumbing (3) · Indoor Air Quality (1).
$105,000 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 (1911) |
| No | Six or more residential units (1) |
| 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) | GEF DEVELOPMENT CORP. |
| Head officer | Michele Kulka |
| Managing agent | GEF DEVELOPMENT CORP. |
| Last registered | 2025-10-23 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $3,600,000 | $1,620,000 |
| 2026 | $3,996,000 | $1,798,200 |
| 2027 | $4,058,000 | $1,826,100 |
The city's market estimate has risen 13% between tax years 2025 and 2027.
| Heating fuel | NATURALGAS |
| Facade (Local Law 11) | SAFE (cycle 10) |
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 | 77 St — 6 · 0.3 mi straight-line (about a 7-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: Madison Av / E 72 St — M1 M2 M3 M4 · 250 ft |
| Citi Bike | 5 Ave & E 72 St · 450 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 006 Lillie D. Blake Middle: J.H.S. 167 Robert F. Wagner. 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.
23 East 73 Street
| 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 |
4 311 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 GEF DEVELOPMENT CORP. — 5 buildings, 13 units. Grades across the portfolio: A1 · B2 · D2. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 843 Lexington Avenue | MN | 4 | B |
| 238 Mulberry Street | MN | 3 | D |
| 970 Lexington Avenue | MN | 3 | A |
| 136 East 73 Street | MN | 2 | B |
| 23 East 73 Street | MN | 1 | D |
Most recent mortgage recorded against this lot: $1,900,000 on 1983-05-16 (lender: Bankers Trust Company). Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 1983-05-16 | Mortgage $1,900,000 — from HERMAN, STEVEN M.D. to BANKERS TRUST COMPANY | $1,900,000 |
| Year | Construction | Enforcement | Housing & tenants | Health & systems | Total |
|---|---|---|---|---|---|
| 2017 | 6 | 0 | 1 | 3 | 10 |
| 2018 | 0 | 3 | 3 | 4 | 10 |
| 2019 | 0 | 0 | 1 | 2 | 3 |
| 2020 | 0 | 1 | 0 | 1 | 2 |
| 2021 | 0 | 0 | 3 | 2 | 5 |
| 2022 | 0 | 0 | 3 | 1 | 4 |
| 2023 | 0 | 1 | 2 | 1 | 4 |
| 2024 | 0 | 1 | 2 | 1 | 4 |
| 2025 | 13 | 13 | 5 | 3 | 34 |
| 2026 | 2 | 1 | 3 | 3 | 9 |
Every one of the 164 recorded events, 1967–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 10021 · Landlord rankings · How grades work · The map · The Mice Map