A modest record — below the level that usually signals systemic problems. More 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 59.7. In ZIP 11213, 61% of residential buildings hold an A and
11% grade D or F.
How grades work
this building
A
B
C
Among 46,798 6-24-unit residential buildings citywide · left is less recorded distress, right is more
Open with the city right now
Open HPD violations
2 total — 1 class C (immediately hazardous), 1 class B, 0 class A. Oldest open since 2024-11-27.
status snapshot refreshed weekly from HPD records
Patterns
22 heat or hot-water complaints in the last three years (winter 2024–25: 12 · winter 2025–26: 10). Repeated winter clusters suggest a chronic heating problem.
12
’24–25
10
’25–26
No bedbug-infested units reported in the last three years of filings.
What 311 hears from this address
17 service requests in the last three years. Most common: HEAT/HOT WATER (10) · Snow or Ice (2) · Water System (1) · PLUMBING (1) · SAFETY (1) · Lead (1).
Filed construction activity
$692,550 in permitted construction work filed since
2016 (8 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.
Rent-stabilization signals
Yes
Built before 1974 (1906)
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 with HPD — the names behind the building
Registered owner(s)
AC 910 PROSPECT LLC
Head officer
ALEXANDER J HORN
Managing agent
Cobble Hill Management
Last registered
2025-07-16
as filed by the owner in the building's HPD registration
What the city thinks it's worth
Tax year
City market value
Assessed value
2025
$1,409,600
$634,320
2026
$1,692,000
$761,400
2027
$1,502,000
$675,900
The city's market estimate has risen
7% between tax years 2025 and 2027.
Building systems
Heating fuel
NATURALGAS
Flood exposure
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.
Getting around
Subway
Nostrand Av — 3 · 0.3 mi straight-line (about a 9-minute walk) · station accessibility: none
Bus
Nearest boarding stop: New York Av / Prospect Pl — B44 · 300 ft
Citi Bike
New York Ave & St Marks Ave · 500 ft · station location as of 2026-09-23; live availability
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.
17 311 service requests from this address in the last three years — 10 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.
Most recent mortgage recorded against this lot: $3,828,146 on
2022-08-22 (lender: Signature Bank), covering 9 lots — the amount covers all of them. Face amount at recording — it may have since been paid
down, refinanced or satisfied. View the recorded
document.
Date
Record
Amount
Per res. unit
2022-08-22
AL&R $27,500,000 — from AC 910 PROSPECT LLC; AC MADISON LLC; AC 45 KINGSTON LLC; AC 216 MACON LLC; AC 475 HANCOCK to SIGNATURE BANK
$27,500,000
2022-08-22
Agreement $27,500,000 — from AC 442 DECATUR LLC; AC 475 HANCOCK LLC; AC 910 PROSPECT LLC; AC 216 MACON LLC; AC MADISON to SIGNATURE BANK
$27,500,000
2022-08-22
Mortgage $3,828,146 — from AC 475 HANCOCK LLC; AC 1050 LAFAYETTE LLC; AC MADISON LLC; AC 216 MACON LLC; AC 442 DECATU to SIGNATURE BANK
$3,828,146
2022-08-12
Deed $2,450,000 — from AV PROSPECT OWNER LLC to AC 910 PROSPECT LLC
$2,450,000
2022-08-03
Sold for $2,450,000
$2,450,000
$306,250
2022-04-27
Mortgage $516,830 — from AV PROSPECT OWNER LLC; AV BAINBRIDGE OWNER LLC; AV KINGSTON OWNER LLC; AV MADISON OWNER LL to SILICON VALLEY BANK; BOSTON PRIVATE BANK & TRUST COMPANY
$516,830
2022-04-27
Agreement $14,501,530 — from AV KINGSTON OWNER LLC; AV PROSPECT OWNER LLC; AV BAINBRIDGE OWNER LLC; AV HANCOCK OWNER LL to SILICON VALLEY BANK; BOSTON PRIVATE BANK & TRUST COMPANY
$14,501,530
2015-07-31
Deed $2,615,000 — from 910 PROSPECT PROPERTIES, CORP. to AV PROSPECT OWNER LLC
$2,615,000
2010-11-26
Agreement $550,000 — from 910 PROSPECT PROPERTIES CORP to CROSS RIVER BANK
$550,000
2010-11-26
Mortgage $217,238 — from 910 PROSPECT PROPERTIES CORP to CROSS RIVER BANK
$217,238
2010-11-26
AL&R $550,000 — from 910 PROSPECT PROPERTIES CORP to CROSS RIVER BANK
$550,000
2004-11-16
AL&R $385,000 — from 910 PROPERTIES CORP to GREENPOINT MORTGAGE FUNDING INC
$385,000
2004-11-16
Mortgage $174,055 — from 910 PROPERTIES CORP to GREENPOINT MORTGAGE FUNDING INC
$174,055
2004-11-16
Agreement $385,000 — from 910 PROPERTIES CORP to GREENPOINT MORTGAGE FUNDING INC
$385,000
2001-07-18
Mortgage $224,000 — from 910 PROSPECT PROPERTIES CORP to GREENPOINT MORTGAGEFUNDING INC
$224,000
Ten-year activity
50250
2017
2018
2019
2020
2021
2022
2023
2024
25
2025
2026
ConstructionEnforcementHousing & tenantsOwnership & moneyHealth & systems
Show as table
Year
Construction
Enforcement
Housing & tenants
Ownership & money
Health & systems
Total
2017
4
1
4
0
2
11
2018
0
1
9
0
3
13
2019
3
1
5
0
4
13
2020
1
0
2
0
2
5
2021
0
0
8
1
11
20
2022
0
0
9
8
5
22
2023
0
0
3
0
4
7
2024
0
0
13
2
4
19
2025
0
0
22
0
3
25
2026
0
0
3
0
5
8
This record is free. Keeping it free costs money. Servers, data pipelines, weekends. Pay what you want — a dollar helps.
HPD class A: (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD
Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2025-12-01
311: HEAT/HOT WATER — ENTIRE BUILDING
2025-12-01
311: HEAT/HOT WATER — APARTMENT ONLY
2025-11-30
Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2025-11-30
311: HEAT/HOT WATER — ENTIRE BUILDING
2025-11-29
Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2025-11-29
311: HEAT/HOT WATER — APARTMENT ONLY
2025-11-11
Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2025-11-11
311: HEAT/HOT WATER — ENTIRE BUILDING
2025-10-29
Bedbug filing: 0 infested units
The full timeline
2026
2026-09-02Rodent inspection: Passed
2026-07-15Boiler inspection
2026-05-06Bedbug filing: 0 infested units
2026-05-05HPD class A: (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD
2026-04-16Rodent inspection: Failed for Rat Activity
2026-03-16Rodent inspection: Failed for Rat Activity
2025-12-01Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2025-12-01Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2025-12-01311: HEAT/HOT WATER — ENTIRE BUILDING
2025-12-01311: HEAT/HOT WATER — APARTMENT ONLY
2025-11-30Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2025-11-30311: HEAT/HOT WATER — ENTIRE BUILDING
2025-11-29Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2025-11-29311: HEAT/HOT WATER — APARTMENT ONLY
2025-11-11Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2025-11-11311: HEAT/HOT WATER — ENTIRE BUILDING
2025-10-29Bedbug filing: 0 infested units
2025-09-03Rodent inspection: Passed
2025-04-25311: Lead — Lead Kit Request (Residential) (L10)
2025-04-16Boiler inspection
2025-03-11Rodent inspection: Passed
2025-02-25HPD class C: HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 3L, 3rd STORY, 1st APARTMENT FR
2025-02-21Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2025-01-21Tenant complaint: PLUMBING — WATER SUPPLY
2025-01-21311: Snow or Ice — Sidewalk
2025-01-21311: Snow or Ice — Sidewalk
2025-01-21311: PLUMBING — WATER SUPPLY
2025-01-10311: Water System — Leak (Use Comments) (WA2)
2024
2024-12-18Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2024-12-18311: HEAT/HOT WATER — APARTMENT ONLY
2024-12-08Bedbug filing: 0 infested units
2024-12-06Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2024-12-06311: HEAT/HOT WATER — APARTMENT ONLY
2024-11-27HPD class C: § 27-2029 ADM CODE PROVIDE AN ADEQUATE SUPPLY OF HEAT FOR THE APARTMENT IN THE 3rd ROOM FROM NORTH LOCATED AT APT 1R, 1st STORY, 1st APARTME
2024-11-27HPD class C: § 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM LOCKED DOOR AT BOILER ROOM
2024-11-27HPD class B: § 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF BICYCLES AT PUBLIC HALL, 1st STORY
2024-11-23Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2024-11-23311: HEAT/HOT WATER — APARTMENT ONLY
2024-11-13Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2024-11-13311: HEAT/HOT WATER — APARTMENT ONLY
2024-10-02AALR — from SIGNATURE BRIDGE BANK, N.A.; SIGNATURE BANK; FEDERAL DEPOSIT INSURANCE CORPORATION to SIG RCRS A/B MF 2023 VENTURE LLC
2024-10-02Mortgage assigned — from SIGNATURE BANK; SIGNATURE BRIDGE BANK, N.A.; FEDERAL DEPOSIT INSURANCE CORPORATION to SIG RCRS A/B MF 2023 VENTURE LLC
2024-09-05Rodent inspection: Passed
2024-03-28Rodent inspection: Failed for Rat Activity
2024-03-25Bedbug filing: 0 infested units
2024-03-06Rodent inspection: Failed for Rat Activity
2024-02-22Boiler inspection
2023
2023-12-05Bedbug filing: 0 infested units
2023-11-13Rodent inspection: Passed
2023-09-11Rodent inspection: Failed for Other Reason
2023-08-10Boiler inspection
2023-03-25Bedbug filing: 0 infested units
2023-03-24HPD class A: (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD
2023-03-23Rodent inspection: Passed
2022
2022-12-23Boiler inspection
2022-11-29HPD class A: § 27-2005 ADM CODE REFIT UPPER AND LOWER SASHES AT WINDOW IN THE BATHROOM LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM SOUTH AT WEST
2022-11-29HPD class C: HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF MICE IN THE ENTIRE APARTMENT LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FROM
2022-11-29HPD class B: § 27-2005 ADM CODE FIRE ESCAPE DEFECTIVE. REPLACE WITH NEW THE BROKEN, DEFECTIVE AND/OR MISSING ONE SLAT AT FLOOR AT BALCONY REAR YARD AT FI
2022-11-29HPD class A: § 27-2014 ADM CODE AND DEPT. RULES AND REGULATIONS. SCRAPE AND REMOVE RUST SCALES AND PAINT WITH 2 COATS OF PAINT ALL STORY BALCONY AT REAR
2022-11-29HPD class B: § 27-2046.1 HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 4R, 4th STORY,
2022-10-24Bedbug filing: 1 infested units
2022-09-15Rodent inspection: Passed
2022-08-22AL&R $27,500,000 — from AC 910 PROSPECT LLC; AC MADISON LLC; AC 45 KINGSTON LLC; AC 216 MACON LLC; AC 475 HANCOCK to SIGNATURE BANK$27,500,000
2022-08-22Agreement $27,500,000 — from AC 442 DECATUR LLC; AC 475 HANCOCK LLC; AC 910 PROSPECT LLC; AC 216 MACON LLC; AC MADISON to SIGNATURE BANK$27,500,000
2022-08-22Mortgage $3,828,146 — from AC 475 HANCOCK LLC; AC 1050 LAFAYETTE LLC; AC MADISON LLC; AC 216 MACON LLC; AC 442 DECATU to SIGNATURE BANK$3,828,146
2022-08-22Mortgage assigned — from BOSTON PRIVATE BANK & TRUST COMPANY; SILICON VALLEY BANK to SIGNATURE BANK
2022-08-12Deed $2,450,000 — from AV PROSPECT OWNER LLC to AC 910 PROSPECT LLC$2,450,000
2022-08-03Sold for $2,450,000$2,450,000
2022-06-07Rodent inspection: Passed
2022-06-05311: Rodent — Rat Sighting
2022-04-27Mortgage $516,830 — from AV PROSPECT OWNER LLC; AV BAINBRIDGE OWNER LLC; AV KINGSTON OWNER LLC; AV MADISON OWNER LL to SILICON VALLEY BANK; BOSTON PRIVATE BANK & TRUST COMPANY$516,830
2022-04-27Agreement $14,501,530 — from AV KINGSTON OWNER LLC; AV PROSPECT OWNER LLC; AV BAINBRIDGE OWNER LLC; AV HANCOCK OWNER LL to SILICON VALLEY BANK; BOSTON PRIVATE BANK & TRUST COMPANY$14,501,530
2022-03-29Rodent inspection: Bait applied
2022-03-14Rodent inspection: Bait applied
2022-03-02Bedbug filing: 0 infested units
2022-03-01HPD class A: (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD
2021
2021-12-07Rodent inspection: Failed for Rat Activity
2021-11-16Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2021-06-17311: Vacant Lot — 8 Request to Clean Vacant Lot
2021-06-09Rodent inspection: Bait applied
2021-05-28Rodent inspection: Bait applied
2021-05-18Rodent inspection: Bait applied
2021-05-07Rodent inspection: Failed for Rat Activity
2021-05-05LDMK — from NYC LANDMARKS PRESERVATION COMMISSION
2021-04-13Bedbug filing: 0 infested units
2021-04-12HPD class A: (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD
2021-04-08Rodent inspection: Failed for Rat Activity
2021-03-11Rodent inspection: Failed for Rat Activity
2020
2020-12-28Boiler inspection
2020-11-28311: Request Large Bulky Item Collection — Request Large Bulky Item Collection
2020-04-16Bedbug filing: 1 infested units
2020-03-17Rodent inspection: Passed
2020-03-13Permit EW — ISSUED
2019
2019-12-19Boiler inspection
2019-10-22Rodent inspection: Passed
2019-09-13Rodent inspection: Failed for Rat Activity and Other Reason
2019-02-01Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2019-02-01311: HEAT/HOT WATER — APARTMENT ONLY
2019-01-17Bedbug filing: 0 infested units
2018
2018-11-08Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2018-11-08311: HEAT/HOT WATER — APARTMENT ONLY
2018-10-29HPD class C: § 27-2029 ADM CODE PROVIDE AN ADEQUATE SUPPLY OF HEAT FOR THE APARTMENT IN THE ENTIRE APARTMENT LOCATED AT APT 4L, 4th STORY, 1st APARTMENT
2018-10-29HPD class C: § 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM DOOR LOCKED AT BOTTOM OF STAIRS AT FRONT AREAWAY TO CELLAR
2018-10-28Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2018-10-28311: HEAT/HOT WATER — ENTIRE BUILDING
2018-10-23Tenant complaint: HEAT/HOT WATER — APARTMENT ONLY
2018-10-23311: HEAT/HOT WATER — APARTMENT ONLY
2018-09-20Rodent inspection: Passed
2018-06-05311: Sanitation Condition — 15 Street Cond/Dump-Out/Drop-Off
2018-05-10Boiler inspection
2018-03-09Rodent inspection: Passed
2018-02-07FDNY inspection (RISK)
2017
2017-11-17Rodent inspection: Passed
2017-11-09Tenant complaint: HEAT/HOT WATER — ENTIRE BUILDING
2017-02-24DOB violation LBLVIO: VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2015 INSPECTION REPORT
2017-02-23Boiler inspection
2017-02-16Permit PL — ISSUED
2017-02-13Permit EW — ISSUED
2017-02-01Job filed: RENOVATE APT. 3L. MINOR NON BEARING PARTITION REMOVAL. NEW PARTITIONS AND FINISHES. REPLACE BATHROOM FIXTURES AND FINISHES. RELOCATE KITCHEN STOVES A$90,600
2017-02-01Job filed: RENOVATE APT. 3L. MINOR NON BEARING PARTITION REMOVAL. NEW PARTITIONS AND FINISHES. REPLACE BATHROOM FIXTURES AND FINISHES. RELOCATE KITCHEN STOVES A$90,600
2016
2016-12-08DOB complaint, category ?
2016-05-04Permit PL — ISSUED
2016-05-02Permit EW — ISSUED
2016-04-26Permit PL — ISSUED
2016-04-19Job filed: RENOVATE APT. 1R. MINOR NON BEARING PARTITION REMOVAL. NEW PARTITIONS AND FINISHES. REPLACE BATHROOM FIXTURES AND FINISHES. RELOCATE KITCHEN STOVES A$79,075
2016-04-19Job filed: RENOVATE APT. 1R. MINOR NON BEARING PARTITION REMOVAL. NEW PARTITIONS AND FINISHES. REPLACE BATHROOM FIXTURES AND FINISHES. RELOCATE KITCHEN STOVES A$79,075
2016-03-08Permit EW — ISSUED
2016-01-19Job filed: RENOVATE APTS. 2R, 3R. MINOR NON BEARING PARTITION REMOVAL. NEW PARTITIONS AND FINISHES. REPLACE BATHROOM FIXTURES AND FINISHES. RELOCATE KITCHEN STO$161,600
2016-01-19Job filed: RENOVATE APTS. 2R, 3R. MINOR NON BEARING PARTITION REMOVAL. NEW PARTITIONS AND FINISHES. REPLACE BATHROOM FIXTURES AND FINISHES. RELOCATE KITCHEN STO$161,600
2015
2015-11-23Mortgage satisfied — from PROSPECT PROPERTIES CORP. to GREENPOINT MORTGAGE FUNDING, INC.
2015-11-23TL&R — from CROSS RIVER BANK
2015-07-31Deed $2,615,000 — from 910 PROSPECT PROPERTIES, CORP. to AV PROSPECT OWNER LLC$2,615,000
2015-01-29HPD class C: § 27-2031 ADM CODE PROVIDE HOT WATER AT ALL HOT WATER FIXTURES IN THE ENTIRE APARTMENT LOCATED AT APT 2R, 2nd STORY, 1st APARTMENT FROM SOUT
2015-01-29HPD class C: § 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING KEY OPERATED LOCK AT DOOR TO FIRE ESCAPE IN THE 4th ROOM FROM NORTH LOCATED AT APT 4R,
2015-01-29HPD class C: § 27-2005, 2007 ADM CODE REMOVE THE ILLEGAL FASTENING KEY OPERATED LOCK AT DOOR TO FIRE ESCAPE IN THE 5th ROOM FROM NORTH LOCATED AT APT 4R,
2015-01-29HPD class C: SECTION 27-2031 ADM CODE PROVIDE HOT WATER AT ALL HOT WATER FIXTURES IN THE ENTIRE APARTMENT LOCATED AT APT 4R, 4th STORY, 1st APARTMENT FRO
2015-01-29HPD class C: § 27-2043.1 HMC INSTALL THE MISSING OR REPAIR/REPLACE THE DEFECTIVE WINDOW GUARD(S) IN ACCORDANCE WITH THE SPECIFICATIONS OF THE NEW YORK CI
2015-01-19Tenant complaint: PLUMBING — WATER SUPPLY
2014-09-02HPD class B: SECTION 27-2018 ADMIN. CODE: ABATE THE NUISANCE CONSISTING OF BEDBUGS IN THE ENTIRE APARTMENT LOCATED AT APT 3R, 3rd STORY, 1st APARTMENT FR