1,178 recorded events, 1900–2026, from 21 city data systems. The city's paper trail here is mostly 453 311 service requests, 376 HPD complaints, 196 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 62% 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 45.1. In ZIP 10463, 74% of residential buildings hold an A and 5% 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 | 16 total — 8 class C (immediately hazardous), 7 class B, 1 class A. Oldest open since 1994-05-17. |
| Active vacate order | 1 unit(s) under an unrescinded HPD vacate order |
status snapshot refreshed weekly from HPD records
4 heat or hot-water complaints in the last three years (winter 2023–24: 4).
No bedbug-infested units reported in the last three years of filings.
$655 in enforcement penalties imposed (ECB/OATH) in the last three years.
17 service requests in the last three years. Most common: Noise (3) · Animal (3) · HEAT/HOT WATER (2) · ELECTRIC (2) · UNSANITARY CONDITION (2) · SAFETY (2).
$48,000 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 (1931) |
| Yes | Six or more residential units (30) |
| 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) | BLUE DIAMOND MARBLE LLC |
| Head officer | KONSTANTINE NALPANTIDIS |
| Managing agent | KATONAH PROPERTY MGMT |
| Last registered | 2025-07-11 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $1,479,000 | $665,550 |
| 2026 | $1,740,000 | $783,000 |
| 2027 | $1,566,000 | $704,700 |
The city's market estimate has risen 6% between tax years 2025 and 2027.
| Heating fuel | NO4FUEL |
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 | Marble Hill-225 St — 1 · 450 ft straight-line (about a 2-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: Broadway / W 225 St — Bx7 Bx20 · 400 ft |
| Citi Bike | Marble Hill Ave & W 227 St · 350 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. X037 - Multiple Intelligence School Middle: In-Tech Academy (M.S. / High School 368). 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.
45 Marble Hill 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 |
17 311 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 KATONAH PROPERTY MGMT CORP — 23 buildings, 294 units. Grades across the portfolio: A14 · B7 · D2. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 3605 Kingsbridge Avenue | BX | 66 | A |
| 2440 Maclay Avenue | BX | 49 | B |
| 696 Rhinelander Avenue | BX | 32 | A |
| 45 Marble Hill Avenue | MN | 30 | B |
| 1845 Bogart Avenue | BX | 27 | A |
| 714 Morris Park Avenue | BX | 24 | A |
| 876 Kinsella Street | BX | 8 | B |
| 205 City Island Avenue | BX | 7 | B |
| 962 Brady Avenue | BX | 7 | A |
| 2335 Ellis Avenue | BX | 6 | A |
| 1823 Fowler Avenue | BX | 5 | A |
| 1873 Holland Avenue | BX | 5 | A |
| 1755 Bronxdale Avenue | BX | 5 | A |
| 1039 Morris Park Avenue | BX | 4 | D |
| 1252 East 224 Street | BX | 3 | A |
| 2121 Hone Avenue | BX | 3 | B |
| 869 Kinsella Street | BX | 3 | B |
| 2390 Grand Concourse | BX | 2 | A |
| 680 Morris Park Avenue | BX | 2 | D |
| 929 Pierce Avenue | BX | 2 | A |
| 416 City Island Avenue | BX | 2 | A |
| 1800 Fowler Avenue | BX | 1 | A |
| 311 City Island Avenue | BX | 1 | B |
Most recent mortgage recorded against this lot: $2,000,000 on 2020-03-03 (lender: Mahopac 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 |
|---|---|---|---|
| 2020-03-03 | AL&R $2,000,000 — from BLUE DIAMOND MARBLE LLC to MAHOPAC BANK | $2,000,000 | |
| 2020-03-03 | Mortgage $2,000,000 — from BLUE DIAMOND MARBLE LLC to MAHOPAC BANK | $2,000,000 | |
| 2006-12-13 | AL&R $650,000 — from ASTORIA FEDERAL SAVINGS AND LOAN ASSOCIA to NALPANTIDIS, ESFTATHIOS | $650,000 | |
| 2006-12-13 | M&CON $650,000 — from NALPANTIDIS, ESFTATHIOS to ASTORIA FEDERAL SAVINGS AND LOAN ASSOCIA | $650,000 | |
| 2001-11-16 | Mortgage $499,500 — from NALPANTIDIS, EFSTATHIOS to NEW YORK COMMUNITY BANK | $499,500 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 0 | 0 | 8 | 3 | 0 | 11 |
| 2018 | 0 | 7 | 34 | 0 | 1 | 42 |
| 2019 | 0 | 4 | 68 | 0 | 1 | 73 |
| 2020 | 0 | 1 | 31 | 4 | 2 | 38 |
| 2021 | 0 | 2 | 15 | 0 | 1 | 18 |
| 2022 | 0 | 1 | 71 | 0 | 2 | 74 |
| 2023 | 0 | 3 | 23 | 0 | 2 | 28 |
| 2024 | 13 | 1 | 15 | 0 | 1 | 30 |
| 2025 | 0 | 0 | 4 | 0 | 2 | 6 |
| 2026 | 0 | 1 | 19 | 0 | 3 | 23 |
Every one of the 1,178 recorded events, 1900–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 10463 · Landlord rankings · How grades work · The map · The Mice Map