1,520 recorded events, 1988–2026, from 19 city data systems. The city's paper trail here is mostly 639 311 service requests, 565 ACRIS deeds & mortgages, 58 DOB permits.
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 73% 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 5.2. In ZIP 10004, 54% of residential buildings hold an A and 14% grade D or F. How grades work
Among 17,252 25-99-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.
12 heat or hot-water complaints in the last three years (winter 2025–26: 4).
No bedbug-infested units reported in the last three years of filings.
522 service requests in the last three years. Most common: Noise (478) · HEAT/HOT WATER (6) · Illegal Parking (5) · GENERAL (5) · Outdoor Dining (4) · Drinking (3).
$128,054 in permitted construction work filed since 2016 (2 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 (1928) |
| Yes | Six or more residential units (31) |
| 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) | BLOCK HALL CONDOMINIUM |
| Head officer | KENDRA TAL |
| Managing agent | CORNERSTONE MGMT SYSTEMS INC |
| Last registered | 2025-10-06 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $159,532 | $71,789 |
| 2026 | $0 | $0 |
| 2027 | $1,334,999 | $600,750 |
The city's market estimate has risen 737% between tax years 2025 and 2027.
Tax exemptions on the roll: COLD WAR VETERAN - DISABILITY
For property tax, the Department of Finance values this condo as if it were a rental building. Its 2016 estimate: gross income $903,706 a year ($44.50 per sq ft), operating expenses $410,628 ($20.22 per sq ft), net operating income $493,078. These are the city's estimates from comparable rentals, not the building's actual budget, rents or maintenance charges.
| Energy grade (LL33) | D — ENERGY STAR score 1/100, posted at the entrance by law (2022 disclosure cycle) |
| Heating fuel | NATURALGAS |
| Facade (Local Law 11) | SWARMP — "Safe With A Repair and Maintenance Program": known facade conditions that must be repaired (cycle 9) |
| Restaurant | Cuisine | Grade | Notes |
|---|---|---|---|
| Havana Social | Latin American | A | — |
Report to 311: Food poisoning · Food safety complaint
1 restaurant · 0 with mice evidence · See them on the Mice Map
2 food-poisoning reports to 311 at this address in the last three years (2 with three or more people sick)
2 Food Establishment complaints to 311 at this address in the last three years (most often: Kitchen/Food Prep Area, No Permit or License) · complaints filed by the public; DOHMH investigates, outcomes aren't published.
In the FEMA 1%-annual-chance floodplain (2015 preliminary flood maps) — lenders typically require flood insurance here.
Hurricane evacuation zone 1 of 6 — zone 1 evacuates first.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
6 street-flooding or sewer-backup complaints at this address since 2010 (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 | Broad St — J Z · 600 ft straight-line (about a 3-minute walk) · station accessibility: none South Ferry — 1 R W · 650 ft straight-line (about a 3-minute walk) · station accessibility: partial |
| Bus | Nearest boarding stop: Water St / Hanover Sq — M15 SIM5 SIM15 SIM35 · 400 ft |
| Citi Bike | Broad St & Bridge St · 400 ft · station location as of 2026-09-23; live availability |
| Bike facility | Shared bike route mapped within 75 ft |
| School zones (2024–25 map) | Elementary: The Peck Slip School 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.
21 South William 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 |
| Food poisoning | Food poisoning |
| Food safety complaint | Food safety complaint |
| Anything else | Anything else |
522 311 service requests from this address in the last three years — 6 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 CORNERSTONE MGMT SYSTEMS INC — 113 buildings, 1,524 units. Grades across the portfolio: A94 · B12 · C6. See the whole portfolio
showing 60 of 113 buildings
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2023-10-11 | Deed $872,000 — from CAMMARATA, VINCENT MICHAEL to THE KAREN ELISABETH SAPP REVOCABLE TRUST; KAREN ELISABETH SAPP, TRUSTEE | $872,000 | |
| 2023-09-22 | Sold for $872,000 | $872,000 | $28,129 |
| 2023-06-21 | Deed $835,000 — from MIRARCHI, MICHAEL to KOCH, SAMUEL NATHAN | $835,000 | |
| 2023-06-13 | Sold for $835,000 | $835,000 | $26,935 |
| 2023-01-26 | Deed $710,000 — from CARULLO, ANGELA to HOSSLI, PETER | $710,000 | |
| 2023-01-17 | Sold for $710,000 | $710,000 | $22,903 |
| 2022-08-03 | Mortgage $700,000 — from JOHNSON, ERIK to MERS | $700,000 | |
| 2022-08-03 | Deed $875,000 — from ABELSON, IDA to JOHNSON, ERIK | $875,000 | |
| 2022-07-22 | Sold for $875,000 | $875,000 | $28,226 |
| 2022-01-28 | Mortgage $393,739 — from WILLIAM PH HOLDINGS 23 LLC to MERS | $393,739 | |
| 2022-01-28 | Agreement $1,498,000 — from WILLIAM PH HOLDINGS 23 LLC to MERS | $1,498,000 | |
| 2021-09-15 | Deed $735,000 — from SETHI, MANDIP K to RONALD JOSEPH STORTO, TRUSTEE; RONALD JOSEPH STORTO LIVING TRUST DATED | $735,000 | |
| 2021-09-14 | Deed $840,000 — from GOFMAN, GENNADY to SHAH, DEEPA; SHAH, TEJASH | $840,000 | |
| 2021-08-30 | Sold for $840,000 | $840,000 | $27,097 |
| 2021-08-12 | Sold for $735,000 | $735,000 | $23,710 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 0 | 1 | 10 | 17 | 18 | 46 |
| 2018 | 0 | 2 | 8 | 16 | 9 | 35 |
| 2019 | 2 | 4 | 15 | 11 | 2 | 34 |
| 2020 | 0 | 1 | 11 | 3 | 1 | 16 |
| 2021 | 0 | 6 | 17 | 14 | 2 | 39 |
| 2022 | 7 | 5 | 34 | 10 | 4 | 60 |
| 2023 | 0 | 4 | 18 | 13 | 4 | 39 |
| 2024 | 0 | 4 | 79 | 2 | 4 | 89 |
| 2025 | 0 | 3 | 319 | 0 | 4 | 326 |
| 2026 | 0 | 0 | 135 | 2 | 0 | 137 |
Every one of the 1,520 recorded events, 1988–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 10004 · Landlord rankings · How grades work · The map · The Mice Map