Brooklyn · Block 3391 · Lot 31 · 11221

720 Knickerbocker Avenue

3 floors · 8 apartments · 5,412 sq ft · built 1910 · class C1 · owner of record: Stonemountain Equities Llc

21open violations
$0ECB/OATH penalties owed
2HPD class C (immediately hazardous)
69dto Gas piping inspection (2026 cycle)

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

Compliance deadlines

RequirementDueStatus
Gas piping inspection (2026 cycle) Likely applies
Local Law 152 · During 2026
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 4 is on the 2026 cycle; certification is filed with DOB after the inspection. Buildings with no gas piping file a certification instead. Agency page

Dec 31, 2026
in 69 days
Due this year
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 69 days
Keep the report on file (not filed with DOB)
Bedbug annual filing Applies
Local Law 69 · December 1 to 31 each year
What this is

Owners of multiple dwellings file their bedbug infestation history for the prior year with HPD and post or distribute it to tenants. Agency page

Dec 31, 2026
in 69 days
Annual
Annual notice: window guards and lead paint Applies
HPD / Health Code · January 1 to 16 each year
What this is

Deliver the annual notice to every unit asking whether a child lives there (window guards for children 10 and under; lead paint for children under 6 in pre-1960 buildings), then follow up on units that don't return it by mid-February. Agency page

Jan 16, 2027
in 85 days
Annual
Annual property registration Applies
HPD registration · September 1 each year
What this is

Residential buildings with three or more units, and one- and two-family homes the owner doesn't occupy, register with HPD every year ($13 fee). An unregistered building can't start a nonpayment case in Housing Court and faces civil penalties. Agency page

Sep 1, 2027
in 313 days
Registered through 2027-09-01

Open violations

ECB / OATH (0)

None open.

DOB (0)

None open.

DOB NOW Safety (1)
IssuedViolationStatus
Oct 31, 2025Gas Piping - LL152 FTF-PL-PER
Cycle 1, Sub-cycle C (premises is in Community District 4)
Active
HPD (20) · C 2 · B 15 · A 3
IssuedClassViolationCorrect by
Jun 4, 2026AApt 5 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING AND NORTH WALL IN THE 1st ROOM FROM NORTH LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHSep 7, 2026
Jun 4, 2026AApt 5 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT WINDOW CASING IN THE 4th ROOM FROM NORTH AT WEST LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHSep 7, 2026
Sep 19, 2025BApt 8 · § 27-2045(B)(1)(A) HMC, § 12-01, § 12-03 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL SMOKE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH DEPARTMENT OF BUILDINGS RULES AND REGULATIONS DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 8, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTHOct 24, 2025
Sep 19, 2025BApt 8 · § 27-2005 ADM CODE REPAIR THE ROOF SO THAT IT WILL NOT LEAK AT CEILING IN THE PRIVATE HALLWAY FROM NORTH LOCATED AT APT 8, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTHOct 24, 2025
Sep 19, 2025BApt 8 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE PRIVATE HALLWAY FROM NORTH LOCATED AT APT 8, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTHOct 24, 2025
Sep 19, 2025BApt 8 · § 27-2045(B)(1)(B) HMC, § 12-06, § 12-07, § 12-09 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL CARBON MONOXIDE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH APPLICABLE LAW AND RULES DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 8, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTHOct 24, 2025
Sep 19, 2025BApt 8 · § 27-2005 ADM CODE REPAIR THE ROOF SO THAT IT WILL NOT LEAK AT THE CEILING IN THE 3rd ROOM FROM NORTH LOCATED AT APT 8, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTHOct 24, 2025
Sep 19, 2025BApt 8 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE 3rd ROOM FROM NORTH LOCATED AT APT 8, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTHOct 24, 2025
Apr 7, 2025C§ 27-2033 ADM CODE POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM MISSING AT PUBLIC HALL, 1st STORYApr 13, 2025
Apr 7, 2025BApt 5 · § 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT NORTHWEST WALL IN THE KITCHENETTE LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHMay 12, 2025
Apr 7, 2025BApt 5 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT NORTHWEST WALL IN THE KITCHENETTE LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHMay 12, 2025
Dec 24, 2024CApt 5 · HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHJan 19, 2025
Dec 24, 2024BApt 5 · § 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK UPPER WINDOW RECESS AT SOUTH WALL IN THE 4th ROOM FROM NORTH LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHJan 28, 2025
Dec 24, 2024AApt 5 · § 27-2013 ADM CODE PAINT WITH LIGHT COLORED PAINT TO THE SATISFACTION OF THIS DEPARTMENT THE NORTH WALL IN THE 1st ROOM FROM NORTH LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM EAST AT SOUTHMar 29, 2025
Oct 15, 2024BApt 5 · § 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT CEILING IN THE 1st ROOM FROM NORTH LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM WEST AT NORTHNov 19, 2024
Oct 15, 2024BApt 5 · § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE COUNTER BALANCE LOWER WINDOW SASH AT EAST WALL IN THE PRIVATE HALLWAY LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM WEST AT NORTHNov 19, 2024
Oct 15, 2024BApt 5 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT SOUTH WALL IN THE 4th ROOM FROM NORTH LOCATED AT APT 5, 2nd STORY, 1st APARTMENT FROM WEST AT NORTHNov 19, 2024
Jul 29, 2019BApt 2 · HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF VERMIN ANTS IN THE ENTIRE APARTMENT LOCATED AT APT 2, 1st STORY, APARTMENT AT WESTSep 2, 2019
Jul 26, 2019BApt 2 · HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF VERMIN FLIES IN THE ENTIRE APARTMENT LOCATED AT APT 2, 1st STORY, APARTMENT AT WESTAug 30, 2019
Jul 26, 2019BApt 2 · § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR THE CEILING IN THE 2nd ROOM FROM NORTH LOCATED AT APT 2, 1st STORY, APARTMENT AT WESTAug 30, 2019

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 23, 2026, 11:38 AM ET. BBL 3033910031.

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