Brooklyn · Block 2275 · Lot 21 · 11206

21 Thornton Street

3 floors · 9,600 sq ft · built 1959 · class M4 · owner of record: St Jos Convent

9open violations
$0ECB/OATH penalties owed
0HPD class C (immediately hazardous)
797dto Gas piping inspection (2028 cycle)

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New violations the morning after they're issued, plus deadline reminders. Free for one building.

Compliance deadlines

RequirementDueStatus
Annual parapet observation Check
Local Law 126 · By December 31 each year
What this is

If the building has a parapet facing a street, sidewalk or other public way, a competent person (such as a mason, engineer or architect) must observe it every year and the owner keeps the report for DOB on request. Detached one- and two-family homes are exempt. Agency page

Dec 31, 2026
in 66 days
Keep the report on file (not filed with DOB)
Gas piping inspection (2028 cycle) Likely applies
Local Law 152 · During 2028
What this is

Buildings with gas piping (except one- and two-family homes) need a periodic gas piping inspection by a licensed master plumber every four years. Community district 1 is on the 2028 cycle; certification is filed with DOB after the inspection. Buildings with no gas piping file a certification instead. Agency page

Dec 31, 2028
in 797 days
Next cycle year 2028
Annual boiler inspection (1 boiler) Applies
Boiler inspection · By December 31 each year
What this is

Boilers are inspected each calendar year and the report is filed in DOB NOW: Safety within 14 days of the inspection (low-pressure boilers in residential buildings of 5 or fewer families are exempt). Latest report on record: 2026-01-30 (Accepted). Agency page

On file2026 reports accepted

Open violations

ECB / OATH (1)
IssuedViolationHearingBalance
Sep 16, 2013Unknown CLASS - 3
SEC. 1RCNY 101.14. WORK W/O A PERMIT. WORK NOTED: WORK CONTRARY TO RULES OF CITY OF NEW YORK SHED OVER-SIZED APPROX 10' HIGH AND 12'LONG ERECTED IN SIDE YARD W/O REQUIRED PERMITS. REMEDY:OBTAIN PERMITS&APPROVED
#35017601Y
Feb 10, 2014
IN VIOLATION
$0
DOB (4)
IssuedViolationStatus
Jan 3, 2017(OTHER BLDGS TYPES) - ELEVATOR AFFIRMATION OF CORRECTION
VIO ISSUED TO ELEVATOR - FAIL TO CORRECT DEFECTS ON 2015 CAT 1 INSP/TST
#11316
DOB VIOLATION - ACTIVE
Jun 10, 2015ELEVATOR ANNUAL INSPECTION / TEST
VIOLATION ISSUED TO ELEVATOR-FAILURE TO FILE CATEGORY 1 2014 INSPECTION/TEST
#04638
DOB VIOLATION - ACTIVE
Mar 21, 2008LOCAL LAW 10/81 - ELEVATOR

#02753
DOB VIOLATION - ACTIVE
Aug 16, 1993LOCAL LAW 62/91 - BOILERS

#25231
DOB VIOLATION - ACTIVE
DOB NOW Safety (4)
IssuedViolationStatus
Jan 3, 2017Elevators ACC1
Active
Jun 10, 2015Elevators EVCAT1
Active
Mar 21, 2008Elevators LL1081
Active
Mar 21, 2008Elevators LL1081
Active
HPD (0)

None open.

Check the agency records

Always confirm on the city's own systems before acting: DOB BIS property profile · DOB NOW · HPD Online · Pay ECB/OATH penalties (CityPay)

City records as of Oct 26, 2026, 11:56 PM ET. BBL 3022750021.

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