824 recorded events, 1900–2026, from 17 city data systems. The city's paper trail here is mostly 250 311 service requests, 230 HPD complaints, 152 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 68% of 25-99-unit residential buildings citywide. The citywide median for 25-99-unit residential buildings is 23.6 penalty points per 10 units; this building carries 60.2. In ZIP 11210, 88% of residential buildings hold an A and 3% grade D or F. How grades work
Among 17,252 25-99-unit residential buildings citywide · left is less recorded distress, right is more
| Open HPD violations | 24 total — 11 class C (immediately hazardous), 7 class B, 6 class A. Oldest open since 2020-10-02. |
status snapshot refreshed weekly from HPD records
51 heat or hot-water complaints in the last three years (winter 2023–24: 2 · winter 2024–25: 43 · winter 2025–26: 4). Repeated winter clusters suggest a chronic heating problem.
2 bedbug-infested unit(s) reported in filings over the last three years.
56 service requests in the last three years. Most common: HEAT/HOT WATER (25) · UNSANITARY CONDITION (7) · Noise (4) · WATER LEAK (4) · Blocked Driveway (3) · DOOR/WINDOW (3).
$368,800 in permitted construction work filed since 2016 (9 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 (1955) |
| Yes | Six or more residential units (50) |
| 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) | SIVAN REALTY LLC |
| Head officer | MEHMET KALKAN |
| Managing agent | DSJ MANAGEMENT CORP |
| Last registered | 2025-08-14 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $3,922,000 | $1,764,900 |
| 2026 | $3,550,000 | $1,597,500 |
| 2027 | $3,247,000 | $1,461,150 |
The city's market estimate has fallen 17% between tax years 2025 and 2027.
| Energy grade (LL33) | D — ENERGY STAR score 20/100, posted at the entrance by law (2022 disclosure cycle) |
| Heating fuel | NATURALGAS |
Not in the FEMA 1%-annual-chance floodplain (2015 preliminary maps).
Hurricane evacuation zone 5 of 6 — zone 1 evacuates first.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
2 street-flooding or sewer-backup complaints at this address since 2018 (0 in the last three years).
Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.
| Subway | Flatbush Av-Brooklyn College — 2 5 · 0.5 mi straight-line (about a 12-minute walk) · station accessibility: full Avenue J — Q · 0.7 mi straight-line (about a 19-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: Nostrand Av / Avenue K — B44 · 200 ft |
| School zones (2024–25 map) | Elementary: P.S. 193 Gil Hodges Middle: Andries Hudde. 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.
2450 Nostrand 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 |
56 311 service requests from this address in the last three years — 25 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 DSJ MANAGEMENT CORP — 20 buildings, 748 units. Grades across the portfolio: A11 · B6 · C1 · D1 · F1. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 667 East 34 Street | BK | 90 | C |
| 2060 East 19 Street | BK | 89 | B |
| 1580 East 13 Street | BK | 84 | A |
| 450 95 Street | BK | 72 | A |
| 403 Avenue C | BK | 72 | A |
| 7401 4 Avenue | BK | 63 | A |
| 2525 Church Avenue | BK | 60 | B |
| 2410 Kings Highway | BK | 53 | B |
| 2450 Nostrand Avenue | BK | 50 | B |
| 2803 Ocean Parkway | BK | 34 | A |
| 2569 Ocean Avenue | BK | 27 | A |
| 1723 East 15 Street | BK | 12 | D |
| 1564 Pacific Street | BK | 8 | A |
| 182 Beach 113 Street | QN | 7 | A |
| 275 Prospect Park West | BK | 6 | A |
| 6911 13 Avenue | BK | 6 | A |
| 2436 Nostrand Avenue | BK | 5 | F |
| 2421 Benson Avenue | BK | 4 | B |
| 524 Beach 67 Street | QN | 3 | A |
| 175 Conselyea Street | BK | 3 | B |
Most recent mortgage recorded against this lot: $1,176,471 on 2002-05-01 (lender: Independence Community Bank). Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2013-07-09 | RPTT $1,810,281 — from METROPCS COMMUNICATIONS, INC.; METROPCS COMMUNICATIONS, INC to T-MOBILE HOLDING GMBH; T-MOBILE HOLDING GMBH | $1,810,281 | |
| 2013-07-09 | RPTT $1,810,281 — from METROPCS COMMUNICATIONS, INC.; METROPCS COMMUNICATIONS, INC to T-MOBILE HOLDING GMBH; T-MOBILE HOLDING GMBH | $1,810,281 | |
| 2004-02-12 | DEEDO $3,225,000 — from COHAB REALTY CORP. to SIVAN REALTY LLC | $3,225,000 | |
| 2002-05-01 | Mortgage $1,176,471 — from COHAB REALTY CORP to INDEPENDENCE COMMUNITY BANK | $1,176,471 | |
| 1994-03-22 | Mortgage $13,601 — from COHAB REALTY CORP. to BANKERS FEDERAL SAVINGS, FSB | $13,601 | |
| 1987-12-04 | Mortgage $159,014 — from COHAB REALTY CORP to CROSSLAND SAVS FSB | $159,014 | |
| 1985-10-23 | Mortgage $200,000 — from COHAB RLTY CORP to STERNLICHT, BENO; SPILBERG, HENRY | $200,000 | |
| 1985-10-23 | Mortgage $187,694 — from COHAB RLTY CORP to CROSSLAND SAVS | $187,694 | |
| 1983-10-17 | Mortgage $68,500 — from MONTANA BRICK RTY CORP to WEBER, BENNY; SANDERS, PHYLLIS; FREIDMAN, NETTIE | $68,500 |
| Year | Construction | Enforcement | Housing & tenants | Health & systems | Total |
|---|---|---|---|---|---|
| 2017 | 8 | 2 | 13 | 1 | 24 |
| 2018 | 2 | 2 | 27 | 1 | 32 |
| 2019 | 0 | 4 | 32 | 1 | 37 |
| 2020 | 2 | 0 | 36 | 2 | 40 |
| 2021 | 0 | 2 | 28 | 2 | 32 |
| 2022 | 2 | 1 | 63 | 1 | 67 |
| 2023 | 0 | 1 | 5 | 1 | 7 |
| 2024 | 2 | 1 | 89 | 2 | 94 |
| 2025 | 1 | 2 | 58 | 1 | 62 |
| 2026 | 2 | 0 | 19 | 1 | 22 |
Every one of the 824 recorded events, 1900–2026, is laid out year by year in the full report (print-ready).
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