5820 21 Avenue
Brooklyn, NY 11204BBL 3-05507-0048Map
Owner of record: Congregation Beis Mordechai Semihai
5820 21 Avenue is a mixed residential and retail building built in 1931 in Brooklyn, 11204. It has 1 residential unit across 2 floors. The owner of record is Congregation Beis Mordechai Semihai. HPD has recorded 34 housing violations here, most recently on November 18, 2025. 1 of the 34 most recent violations are still open.
- HPD violations
- 34
- DOB violations
- 2
- ECB violations
- 4
- HPD complaints
- 0
What to know
No open immediately-hazardous violations among recent records.
Date of the most recent HPD inspection that found a problem.
No balance due on recent ECB violations.
Rent stabilization
No rent-stabilized units in 2018–2024 tax bills
Violations
Most recent first. Showing up to 50 per agency.
HPD housing violations · 34
- IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Nov 18, 2025
Closed — Violation dismissed - ANon-hazardous
Paint metal in accordance with dept. regulation riser in the 2nd bathroom from north located at apt 2, 2nd story, 1st apartment from south at west
Aug 15, 2025 · Apt 2
Closed — Violation dismissed - BHazardous
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 2, 2nd story, 1st apartment from south at west
Aug 15, 2025 · Apt 2
Closed — Violation dismissed - ANon-hazardous
Paint metal in accordance with dept. regulation riser in the 1st bathroom from north located at apt 2, 2nd story, 1st apartment from south at west
Aug 15, 2025 · Apt 2
Closed — Violation dismissed - BHazardous
Repair, replace or provide an approved and operational smoke detecting device, installed in accordance with department of buildings rules and regulations inoperable in the entire apartment located at apt 2, 2nd story, 1st apartment from south at west
Aug 15, 2025 · Apt 2
Closed — Violation dismissed - ANon-hazardous
File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.
Jun 6, 2025
Closed — Violation dismissed - ANon-hazardous
File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.
Apr 3, 2024
Closed — Violation dismissed - IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Nov 17, 2023
Closed — Violation dismissed - ANon-hazardous
File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.
Mar 20, 2023
Closed — Violation dismissed - IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Nov 4, 2022
Closed — Violation dismissed
Show 24 more ↓
- ANon-hazardous
File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.
Feb 22, 2022
Closed — Violation dismissed - ANon-hazardous
File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.
Apr 6, 2021
Closed — Violation dismissed - IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Apr 6, 2021
Closed — Violation dismissed - ANon-hazardous
§ 329, m/d law and dept. rules and regs. provide a completed certificate of inspection visits in a proper frame at or near mailboxes, bottom edge of frame between 48-62 inches above floor missing at public hall, 1st story
Sep 5, 2019
Closed — Violation dismissed - ANon-hazardous
Post and maintain a proper notice on wall of the entrance story in english and spanish on the availability of the agencys housing information guide. a sample notice can be found at www.nyc.gov/hpd. at public hall, 1st story
Sep 5, 2019
Closed — Violation dismissed - CImmediately hazardous
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 story
Sep 5, 2019
Closed — Violation closed - ANon-hazardous
Post a proper notice of smoke detector requirements, in a form approved by the commissioner, at or near the mail box missing at public hall, 1st story
Sep 5, 2019
Closed — Violation dismissed - ANon-hazardous
Post and maintain a proper sign on wall of entrance story showing the registration number assigned by the department and the address of the building. at public hall, 1st story
Sep 5, 2019
Closed — Violation dismissed - ANon-hazardous
Post a proper notice of carbon monoxide detecting device requirements, in a form approved by the commissioner, in a common area of a class a multiple dwelling near inspection certificate or provide notice to tenants in a private dwelling. at public hall, 1st story
Sep 5, 2019
Closed — Violation dismissed - ANon-hazardous
Post, in a form approved by the commissioner, and maintain a notice in a common area of the building regarding the procedures that should be followed when a gas leak is suspected
Sep 5, 2019
Closed — Violation dismissed - IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Oct 12, 2018
Closed — Violation dismissed - IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Oct 6, 2015
Closed — Violation dismissed - BHazardous
Remove all encumbrances consisting of debris and household items at public hall, 1st story
Sep 2, 2015
Closed — Violation closed - ANon-hazardous
Repair the broken or defective plastered surfaces and paint in uniform color ceiling at skylight area in the private hallway located at apt 2, 2nd story
Sep 2, 2015 · Apt 2
Closed — Violation closed - IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Feb 6, 2015
Closed — Violation dismissed - BHazardous
Provide adequate lighting at or near the outside of the front entranceway of the building and keep same burning from sunset every day to sunrise on the day following 50 watts minimum.
Oct 8, 1987
Closed — Violation closed - BHazardous
D26-19.07 adm code provide adequate lighting at or near the outside of the front entranceway of the building and keep same burning from sunset every day to sunrise on the day following 100 watts.
Jun 9, 1986
Open — Nov sent out - ANon-hazardous
D26-20.08,20.09 adm code file certification of satisfactory installation of smoke detecting device in accordance with h.p.d. rules and regulations.
Jan 20, 1982
Closed — Violation closed - ANon-hazardous
D26-21.05 adm code post and maintain a street number on the front of the dwelling plainly visible from the sidewalk.
Apr 20, 1979
Closed — Violation closed - ANon-hazardous
D26-41.15 adm code post and maintain a proper sign on wall of entrance story showing the registration number assigned by the department and the address of the building.
Apr 20, 1979
Closed — Violation closed - ANon-hazardous
Section 329, m/d law and dept. rules and regs. provide a completed certificate of inspection visits in a proper frame at or near mailboxes, bottom edge of frame between 48-62 inches above floor frame missing.
Apr 20, 1979
Closed — Violation closed - BHazardous
D26-10.01 adm code replace with new the missing fire proof self closing doors at top & bottom of cellar stairs.
May 27, 1976
Closed — Violation closed - BHazardous
Section 65 m/d law provide under completed permit, a proper enclosure for the central heating plant, cellar center.
May 27, 1976
Closed — Violation closed - BHazardous
D26-32.01 adm code discontinue unlawful cooking space or file plans and application with this department to legalize same, if lawfully feasible, cellar center.
May 27, 1976
Closed — Violation closed
DOB building violations · 2
- Construction other optional
Work w/out permit
Jun 20, 2007
Vw*-violation - work w/o permit dismissed - Construction other optional
Work without a permit. work noted: cut opening at 1st fl and installed 3' metal door and metal stairs into a shared driveway. cut opening at 2nd sty and installed door & balcony also over hanging into a shared driveway. stop all work. remedy: obtain a permit if feasible. contact dob at 802-3685 prior to return to work
Mar 16, 2000
Vw*-violation - work w/o permit dismissed
ECB violations · 4
- Hazardous
Work w/o permit. extension below porch at rear of bldg approx 15' x 20' was erected w/o obtain permit as per department record.(steel porch at 2nd fl level rear was erected under permit # 302219604).
Jun 20, 2007
Resolve - Non-hazardous
Failure to provide 8' height fence where required during const operations. noted filed appl #30221964 exp 1/17/07 "propose to erect porch atrear as shown! however no 8' height fence provided at rear yrd east
Jan 16, 2007 · Penalty $480
Resolve - Non-hazardous
Work w/o a permit:work note:cut opening at 1st story and installed 3'-0" metal door and metal stairs into a shaped driveway.(2)cut opening at 2nd story and installing door and balcony also over hanging into a
Mar 16, 2000
Resolve - Non-hazardous
Failure to provide plans at premises at time of inspection . defect is: no approved plans at site for renovation under job # 300924757-01- al remedy: stop all work. 2- provide approved plans to show door openin
Jan 12, 2000
Resolve
Complaints
No HPD complaints in our records
Sales history
No recorded sales in our data
Building details
- Building type
- Mixed residential and retail building (S1)
- Year built
- 1931
- Floors
- 2
- Residential units
- 1
- Building area
- 3,280 ft²
- Lot area
- 2,483 ft²
- Zoning
- R5
- Community board
- 312
- Council district
- 44
- Block / lot
- 5507 / 48
- Assessed value
- $160,920
- Landmark / historic district
- No
HPD registration #322950, last renewed Dec 5, 2025.
Questions about 5820 21 Avenue
Who owns 5820 21 Avenue?
The owner of record in NYC Department of City Planning PLUTO data is Congregation Beis Mordechai Semihai.
Does 5820 21 Avenue have violations?
Yes. NYC HPD has recorded 34 housing violations at this property.
Is 5820 21 Avenue rent stabilized?
No rent-stabilized units appear in its 2018–2024 tax bills. Individual apartments can still be regulated, so request the rent history from NYS Homes and Community Renewal if unsure.
When was 5820 21 Avenue built?
City records list 1931 as the year it was built.
How many apartments are in 5820 21 Avenue?
It has 1 residential units and 2 units in total.
Source: NYC Open Data (DCP PLUTO, HPD, DOB, ECB/OATH, DOF). Records can lag the city's systems. Data refreshed weekly.