132 recorded events, 1966–2026, from 11 city data systems. The city's paper trail here is mostly 57 ACRIS deeds & mortgages, 37 311 service requests, 9 boiler inspections.
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 75% 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 5. In ZIP 11215, 70% of residential buildings hold an A and 4% 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 | 2 total — 1 class C (immediately hazardous), 0 class B, 1 class A. Oldest open since 2016-03-20. |
status snapshot refreshed weekly from HPD records
2 heat or hot-water complaints in the last three years (winter 2025–26: 2).
No bedbug-infested units reported in the last three years of filings.
10 service requests in the last three years. Most common: Street Condition (7) · General Construction/Plumbing (1) · Noise (1) · HEAT/HOT WATER (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 (1885) |
| Yes | Six or more residential units (8) |
| 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) | 873 UNION STREET LTD PART |
| Head officer | GEORGE KOTSONIS |
| Managing agent | KOTSONIS ORGANIZATION LLC. |
| Last registered | 2025-10-11 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $2,614,000 | $1,176,300 |
| 2026 | $2,091,000 | $940,950 |
| 2027 | $1,914,000 | $861,300 |
The city's market estimate has fallen 27% between tax years 2025 and 2027.
| Heating fuel | NO2FUEL |
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 | Grand Army Plaza — 2 3 · 950 ft straight-line (about a 5-minute walk) · station accessibility: none 7 Av — B Q · 0.2 mi straight-line (about a 6-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: 7 Av / Union St — B67 B69 · 250 ft |
| Citi Bike | Berkeley Pl & 7 Ave · 350 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 282 Park Slope. 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.
873 Union 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 |
10 311 service requests from this address in the last three years — 1 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 KOTSONIS ORGANIZATION LLC. — 27 buildings, 239 units. Grades across the portfolio: A20 · B6 · C1. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 94 Prospect Park West | BK | 30 | A |
| 594 6 Street | BK | 16 | B |
| 101 Prospect Park West | BK | 10 | A |
| 767 Union Street | BK | 10 | A |
| 549 Bergen Street | BK | 10 | B |
| 770 Union Street | BK | 9 | B |
| 886 Union Street | BK | 9 | B |
| 392 Prospect Avenue | BK | 8 | A |
| 693 Union Street | BK | 8 | A |
| 873 Union Street | BK | 8 | A |
| 845 President Street | BK | 8 | A |
| 195 5 Avenue | BK | 8 | A |
| 896 Union Street | BK | 8 | B |
| 768 Union Street | BK | 8 | A |
| 298 1 Street | BK | 8 | A |
| 898 Union Street | BK | 8 | B |
| 664 6 Avenue | BK | 8 | A |
| 695 Union Street | BK | 8 | A |
| 800 President Street | BK | 8 | A |
| 134 29 Street | BK | 8 | A |
| 832 Union Street | BK | 7 | A |
| 74 Douglass Street | BK | 7 | A |
| 248 5 Avenue | BK | 7 | A |
| 21 Sterling Place | BK | 6 | A |
| 633 10 Street | BK | 6 | A |
| 287 19 Street | BK | 5 | A |
| 287 6 Avenue | BK | 3 | C |
Most recent mortgage recorded against this lot: $26,630 on 2022-01-04 (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 |
|---|---|---|---|
| 2022-01-04 | Mortgage $26,630 — from 873 UNION STREET LIMITED PARTNESHIP to JPMORGAN CHASE BANK, N.A | $26,630 | |
| 2022-01-04 | Agreement $1,925,000 — from 873 UNION STREET LIMITED PARTNESHIP to JPMORGAN CHASE BANK, N.A | $1,925,000 | |
| 2016-04-11 | Mortgage $957,688 — from 873 UNION STREET L.P. to JPMORGAN CHASE BANK, N.A. | $957,688 | |
| 2016-04-11 | Agreement $1,920,000 — from 873 UNION STREET L.P. to JPMORGAN CHASE BANK, N.A. | $1,920,000 | |
| 2016-04-11 | Agreement $1,920,000 — from 873 UNION STREET L.P. to JPMORGAN CHASE BANK, N.A. | $1,920,000 | |
| 2011-07-07 | AL&R $1,050,000 — from 873 UNION STREET LIMITED PARTNERSHIP to CAPITAL ONE, N.A. | $1,050,000 | |
| 2011-07-07 | Agreement $1,050,000 — from 873 UNION STREET LIMITED PARTNERSHIP to CAPITAL ONE, N.A. | $1,050,000 | |
| 2011-07-07 | Mortgage $237,995 — from 873 UNION STREET LIMITED PARTNERSHIP to CAPITAL ONE, N.A. | $237,995 | |
| 2005-11-07 | Mortgage $884,000 — from 873 UNION STREET LIMITED PARTNERSHIP to WASHINGTON MUTUAL BANK | $884,000 | |
| 2002-04-25 | Mortgage $295,006 — from 873 UNION STREET LP to CARVER FEDERAL SAVINGS BANK | $295,006 | |
| 1997-05-05 | Mortgage $90,000 — from KOTSONIS, GEORGE to CARVER FEDERAL SAVINGS BANK | $90,000 | |
| 1997-05-05 | Mortgage $210,000 — from KOTSONIS, GEORGE to FIRST FIDELITY BANKN.A.; FIRST UNION NATIONALBANK | $210,000 | |
| 1997-05-05 | Mortgage $210,000 — from KOTSONIS, GEORGE to FIRST FIDELITY BANKN.A.; FIRST UNION NATIONALBANK | $210,000 | |
| 1996-08-28 | Mortgage $1,080,000 — from KOTSONIS, GEORGE to FIRST FIDELITY BANKN.A.; FIRST UNION NATIONALBANK | $1,080,000 | |
| 1992-07-16 | Mortgage $649,135 — from KOTSONIS, GEORGE; KOTSONIS, PENELOPE to VILLAGE BANK | $649,135 |
| Year | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|
| 2017 | 0 | 1 | 0 | 0 | 1 |
| 2018 | 0 | 1 | 0 | 1 | 2 |
| 2019 | 0 | 5 | 0 | 1 | 6 |
| 2020 | 0 | 3 | 0 | 2 | 5 |
| 2021 | 0 | 6 | 0 | 0 | 6 |
| 2022 | 0 | 2 | 3 | 1 | 6 |
| 2023 | 1 | 4 | 0 | 1 | 6 |
| 2024 | 3 | 2 | 0 | 2 | 7 |
| 2025 | 0 | 12 | 0 | 1 | 13 |
| 2026 | 0 | 2 | 0 | 1 | 3 |
Every one of the 132 recorded events, 1966–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 11215 · Landlord rankings · How grades work · The map · The Mice Map