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ViolationScout12 open Class C, with 0 certifications filed and 1 new Class C in the last 180 days, too few to call a direction.Is this your building?
Buildings850 St Marks Avenue, BrooklynCurrent through

850 St Marks Ave, Brooklyn

BBL 3-01228-0037

En español: 12 violaciones de Clase C abiertas (peligro inmediato) y 23 abiertas en total. La más antigua del HPD lleva 7 años abierta, desde el 23 de noviembre de 2018.

Open violations are sitting, with little movement either way. 12 open Class C, with 0 certifications filed and 1 new Class C in the last 180 days, too few to call a direction.

The oldest open HPD violation has been open 7 years, since November 23, 2018.

Since September 29, 2023, a certification was filed on 1 Class C violation, after the original certify-by date. How certification works

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12 open Class C, an OATH hearing on October 7, 2026, and a facade rated Unsafe. The oldest open HPD violation was filed November 23, 2018.

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HPD takes complaints from tenants through 311.

OATH hearings
A hearing on a DOB summons is set for October 7, 2026.
DOB violations
6 active DOB violations. The newest was issued July 5, 2023.
Housing court
1 open housing court case, opened June 17, 2025.
DOB facade
Rated Unsafe in the latest facade report, filed September 16, 2026 (inspection cycle 10). Need this filed?
DOB permits
1 DOB work permit in effect, for Sidewalk Shed work, issued November 25, 2025.
Energy benchmarking
ENERGY STAR score 79 for 2024, against a median of 67 for Multifamily Housing that year.
Local Law 97
Covered under Article 321, the path for certain affordable housing and houses of worship (DOB's list, March 1, 2026).
Bedbug report
Filed December 10, 2025, for the year to October 31, 2025. Buildings with 3 or more apartments file one with HPD every year.
HPD emergency repair order
1 completed HPD emergency repair order since September 29, 2023: a general construction order, opened June 13, 2026, awarded for $546.

Open violations by class. A party is named only where the building's HPD registration covers the date a violation was filed.

FiledCategoryStatusNumberRegistered party when filed
Class C12 open most often Lead Paint
Vermin / InfestationNotice sent to tenant18877795
Vermin / InfestationNot complied with18111818
Notice sent17857083
Lead PaintDefect letter sent17577810
Lead PaintDefect letter sent17577809
Lead PaintDefect letter sent17577808
Lead PaintDefect letter sent17577807
Lead PaintDefect letter sent17577806
Lead PaintDefect letter sent17577805
Vermin / InfestationDefect letter sent17572605
The report lists all 12, each with the city's own words and the date on its notice. What the report adds
Class B8 open
Notice sent18877796
Notice sent18315478
MoldTo be reinspected18556907
Not complied with18212002
Not complied with18212001
Not complied with18212000
Not complied with18211998
Not complied with18211997
OATH/ECB3 open
Construction, Class 2Hearing pending35729697NST MARKS AVE HDFC
Local Law, Class 2Found in violation37036889Z
Class 2Found in violation39159673M

The full report on 850 St Marks Ave, Brooklyn

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The most common category among the open records here is lead paint.

Lead paint in Brooklyn

Other buildings on this tax block

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Questions about this building

Does 850 St Marks Avenue, Brooklyn have open violations?

Yes. 850 St Marks Avenue, Brooklyn had 23 open violations on September 27, 2026: 3 from OATH/ECB and 20 from HPD. 12 are Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 7 years, since November 23, 2018.

Is 850 St Marks Avenue, Brooklyn getting better or worse?

Open violations are sitting, with little movement either way. 12 open Class C, with 0 certifications filed and 1 new Class C in the last 180 days, too few to call a direction. That window ends September 27, 2026. It compares certifications filed with new Class C violations, and it describes what happened, not what anyone intends.

When were certifications filed on Class C violations at 850 St Marks Avenue, Brooklyn?

Since September 29, 2023, a certification was filed on 1 Class C violation, after the original certify-by date. A certification is the filing, dated when it was made, not HPD's acceptance of it. It is compared with the original certify-by date on the notice. A granted postponement moves that date and the city's data keeps only the first, so a certification counted after it may still have met a postponed date.

Does 850 St Marks Avenue, Brooklyn have an OATH hearing coming up?

Yes. A hearing on a DOB summons is set for October 7, 2026. DOB summonses are heard at OATH, the city's hearings office, and OATH can move a hearing to a later date. When nobody shows up, the summons is decided by default, the costliest way one ends.

Does 850 St Marks Avenue, Brooklyn have active DOB violations?

Yes. 6 active DOB violations. The newest was issued July 5, 2023. The Department of Buildings writes these separately from HPD's housing violations, for things like boilers, elevators, facades, construction and energy filings. Each one stays active until DOB resolves or dismisses it.

Is 850 St Marks Avenue, Brooklyn in housing court?

Yes. 1 open housing court case, opened June 17, 2025. HPD takes buildings to housing court to get violations fixed and heat and hot water restored, and it joins tenants' own repair cases, called tenant actions. A case stays open until the court closes it.

Are any HPD emergency repair orders at 850 St Marks Avenue, Brooklyn marked completed?

Yes. 1 completed HPD emergency repair order since September 29, 2023: a general construction order, opened June 13, 2026, awarded for $546. HPD orders an emergency repair when a hazardous condition cited in a violation, or in another agency's emergency order, is not corrected, and does the work itself or through a contractor. The amounts are what the orders were awarded for, not a bill: this page does not show what was charged to the property or whether it was paid. Orders for lab tests, such as dust-wipe and asbestos samples, are not counted.

What did the latest facade report find at 850 St Marks Avenue, Brooklyn?

Rated Unsafe in the latest facade report, filed September 16, 2026 (inspection cycle 10). Buildings taller than six stories must have their exterior walls inspected once in every inspection cycle under the city's Facade Inspection Safety Program (every five years under DOB's current rule), and each inspection report is filed with DOB as Safe, SWARMP (safe with a repair and maintenance program) or Unsafe. No Report Filed means DOB has no report for that cycle. The rating is from the latest filing and does not describe the facade today; DOB's page for the building shows anything filed since.

Are any DOB work permits in effect at 850 St Marks Avenue, Brooklyn?

Yes. 1 DOB work permit in effect, for Sidewalk Shed work, issued November 25, 2025. A permit in effect allows the work it names. It does not mean the work has started or finished, or that it fixes any violation on this page.

What is the ENERGY STAR score for 850 St Marks Avenue, Brooklyn?

ENERGY STAR score 79 for 2024, against a median of 67 for Multifamily Housing that year. Buildings over 25,000 square feet report their energy use to the city every year under Local Law 84. The ENERGY STAR score runs from 1 to 100 and compares a building with similar ones nationwide; 50 is the national median. The score is the one the city publishes, and this page never estimates a Local Law 97 emissions penalty. A lot that reported several properties in one year is not scored here.

When did 850 St Marks Avenue, Brooklyn last file its bedbug report?

On December 10, 2025, for the year to October 31, 2025. HPD asks the owner of every building with 3 or more apartments for this report once a year, covering November 1 to October 31, including buildings that had no bedbugs.

Is 850 St Marks Avenue, Brooklyn covered by Local Law 97?

Yes. It is on DOB's Local Law 97 covered buildings list. Covered under Article 321, the path for certain affordable housing and houses of worship (DOB's list, March 1, 2026). Local Law 97 sets greenhouse gas limits for most New York City buildings over 25,000 square feet, and DOB's covered buildings list says which path each building is on. The list reflects DOB's records, which owners can ask DOB to correct. This page never estimates a penalty or says whether a building complies.

When was 850 St Marks Avenue, Brooklyn built?

The city's record gives 1926 as the year 850 St Marks Avenue, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as an elevator apartment building with 6 floors.

How many apartments does 850 St Marks Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 54 residential units at 850 St Marks Avenue, Brooklyn. The count is for the whole tax lot.

Where do these numbers come from?

From New York City's own data: HPD housing violations and OATH/ECB hearing results, read whole rather than sampled. It also draws on OATH hearing dates, DOB violations, HPD's housing court cases, DOB facade filings, DOB NOW work permits, HPD emergency repair orders, Local Law 84 energy reports, HPD's annual bedbug reports, DOB's Local Law 97 covered buildings list and the city's PLUTO tax-lot file. This page is current through September 27, 2026. The city's data changes daily, so a violation certified after that can still show as open here; the city's own page for this building is linked above.

Sources. HPD housing violations and OATH/ECB hearing results, plus OATH hearing dates, DOB violations, HPD's housing court cases, DOB facade filings, DOB NOW work permits, HPD emergency repair orders, Local Law 84 energy reports, HPD's annual bedbug reports, DOB's Local Law 97 covered buildings list and the city's PLUTO tax-lot file. Counts cover HPD Class B and C violations from the last 3 years that HPD still shows open, and OATH/ECB summonses from the same 3 years that the city still shows active. The city's own pages can show more, never fewer.

Cite this page

ViolationScout, 850 St Marks Ave, Brooklyn: 12 open Class C, from New York City's HPD violation and OATH/ECB hearing data. Figures through September 27, 2026. https://violationscout.com/building/850-st-marks-avenue-brooklyn

How we count: /method.

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