Skip to content
ViolationScoutYour building
Buildings451 Classon Avenue, BrooklynCurrent through

451 Classon Ave, Brooklyn

BBL 3-01973-0001

Built
1930
Floors
4
Residential units
3
Building type
Residence with stores or offices
Zoning district
R6B
Lot area
1,254 sq ft
Floor area
2,946 sq ft
Last sale
$1,500,000

En español: 2 violaciones abiertas. La más antigua del HPD lleva 26 años abierta, desde el 19 de abril de 2000.

Open now

  1. 2

    OATH/ECB summonses still active. Most often Construction.

    See the 2
Is this your building?

2 open violations. The oldest open HPD violation was filed April 19, 2000.

A firm we work with can take these on. We reply within one business day with the firm's name. You decide whether to talk to them. One firm, not a list.

Your details stay with us, and go only to the one firm you are introduced to. No lists, no resale.

¿Es su edificio? Déjenos un correo o un teléfono. Leemos cada solicitud.

See everything first: the building report, $19

Or file it yourself: what it can hold up, and how correction is filed

The case file on a building like this names who is responsible on HPD's registration and how to reach them. We prepare them for firms on our pilot, ranked by how much hazardous work is open.

Get leads for your boroughs

The building report reads this record for you: every open violation in the city's own words, what each status means, and how the building compares with others its size. Usually ready within 15 minutes of payment.

Get the report, $19

HPD takes complaints from tenants through 311.

For a letter to your landlord or a housing court case, the report lists every open violation here, each in the city's own words with the date on its notice. Get the report, $19

OATH/ECB summonses
6 DOB and FDNY summonses here since January 1, 2019, with $33,500 in penalties imposed. 2 of them are still active, the same 2 listed under OATH/ECB. 6 judgments docketed, the latest on June 30, 2026. A docketed judgment shows up in a title search.
  • January 9, 2026, DOB: Failure to maintain building in code-compliant manner. In violation, $2,500 penalty imposed.
  • November 10, 2025, DOB: Failure to maintain building in code-compliant manner. In violation, $1,250 penalty imposed.
  • May 9, 2023, DOB: Failure to maintain building walls or appurtenances. Decided by default, $12,500 penalty imposed.

The newest 3 of 6 summonses OATH lists here. The report lists all 6, with each outcome, the penalty imposed and any docketing date. What the report adds

How a default is vacated

DOF tax lien sale
Listed for DOF's 2025 tax lien sale. The last list it appeared on was the 30-day notice of April 2025.
DOB violations
3 active DOB violations, most of them for construction. The newest was issued May 9, 2023.
DOB complaints
1 DOB complaint in the 12 months to September 25, 2026. It was filed December 30, 2025.
DOB permits
5 DOB work permits in effect. The latest, for Structural work, was issued October 6, 2026.
  • Structural, issued October 6, 2026, in effect until March 12, 2027.
  • Supported Scaffold, issued August 12, 2026, in effect until November 10, 2026.
  • Sidewalk Shed, issued August 12, 2026, in effect until May 29, 2027.

The newest 3 of 5 permits DOB NOW lists here. The report lists all 5, with job numbers and each job's estimated cost. What the report adds

Bedbug report
Filed December 30, 2024, for the year to October 31, 2024. Buildings with 3 or more apartments file one with HPD every year.

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

FiledCategoryStatusNumber
OATH/ECB2 open most often Construction
Construction, Class 1Found in violation39173292J
Construction, Class 2Found in violation39166433Z

The full report on 451 Classon Ave, Brooklyn

Get the report on 451 Classon Ave, Brooklyn, $19 See a sample report

Usually ready within 15 minutes of payment, on your order page and by email. If it tells you nothing you did not already know, reply and we refund it.

Nearby buildings

Questions about this building

Does 451 Classon Avenue, Brooklyn have open violations?

Yes. 451 Classon Avenue, Brooklyn had 2 open violations on October 10, 2026: 2 from OATH/ECB. None of them is Class C, but counting every year, HPD has 5 Class C violations still open here. The oldest open HPD violation has been open 26 years, since April 19, 2000.

Does 451 Classon Avenue, Brooklyn have active DOB violations?

Yes. 3 active DOB violations, most of them for construction. The newest was issued May 9, 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.

Has DOB received complaints about 451 Classon Avenue, Brooklyn?

Yes. 1 DOB complaint in the 12 months to September 25, 2026. It was filed December 30, 2025. Anyone can complain to DOB about a building or the work going on in it, and DOB then inspects and decides whether there is a violation. A conversion complaint says an apartment may have been added or changed without approval. It is a complaint, not a finding.

Are any DOB work permits in effect at 451 Classon Avenue, Brooklyn?

Yes. 5 DOB work permits in effect. The latest, for Structural work, was issued October 6, 2026. 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.

When did 451 Classon Avenue, Brooklyn last file its bedbug report?

On December 30, 2024, for the year to October 31, 2024. 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.

When was 451 Classon Avenue, Brooklyn built?

The city's record gives 1930 as the year 451 Classon Avenue, Brooklyn was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a residence with stores or offices with 4 floors.

How many apartments does 451 Classon Avenue, Brooklyn have?

The Department of City Planning's PLUTO tax-lot file lists 3 residential units at 451 Classon 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/ECB summonses from DOB and FDNY, DOF's tax lien sale lists, DOB violations, DOB complaints, DOB NOW work permits, HPD's annual bedbug reports, the city's PLUTO tax-lot file and DOF's property sales records. This page is current through October 10, 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/ECB summonses from DOB and FDNY, DOF's tax lien sale lists, DOB violations, DOB complaints, DOB NOW work permits, HPD's annual bedbug reports, the city's PLUTO tax-lot file and DOF's property sales records. 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, 451 Classon Ave, Brooklyn: 3 units, 2 open violations, from New York City's HPD violation and OATH/ECB hearing data. Figures through October 10, 2026. https://violationscout.com/building/451-classon-avenue-brooklyn

How we count: /method.

Is this your building?