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Buildings523 Lexington Avenue, ManhattanCurrent through

523 Lexington Ave, Manhattan

BBL 1-01303-7503 Landmark: Individual Landmark

Built
1923
Floors
34
Building type
Condominium
Zoning district
C6-6
Lot area
22,424 sq ft
Floor area
304,530 sq ft

En español: 3 violaciones abiertas, ninguna de Clase C. La más antigua del HPD lleva 14 meses abierta, desde el 23 de julio de 2025.

Open now, most hazardous first

  1. 2

    Class B, hazardous

    See the 2
  2. 1

    OATH/ECB summons still active

    See it

The original certify-by dates on the 2 open HPD violations run from January 9, 2026 to November 23, 2026. The report prints the date beside each one.

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3 open violations. The oldest open HPD violation was filed July 23, 2025.

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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.

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

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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
19 DOB and FDNY summonses here since January 1, 2019, with $35,905 in penalties imposed. 1 of them is still active, the one listed under OATH/ECB. 6 judgments docketed, the latest on February 28, 2026. A docketed judgment shows up in a title search.
  • September 14, 2026, FDNY: Certificates of fitness and certificates of qualification.
  • August 25, 2026, FDNY: Fire protection systems.
  • August 16, 2026, FDNY: Fire protection systems: Fail to prevent unnecessary unwarranted alarms.

The newest 3 of 19 summonses OATH lists here. The report lists all 19, with each outcome, the penalty imposed and any docketing date. What the report adds

DOB permits
1 DOB work permit in effect, for General Construction work, issued March 24, 2026.
  • Suspended Scaffold, issued April 7, 2026, signed off.
  • General Construction, issued March 24, 2026, in effect until February 14, 2027.
  • Sprinklers, issued November 29, 2023, signed off.

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

Energy benchmarking
ENERGY STAR score 74 for 2024, against a median of 77 for Residence Hall/Dormitory that year.
Local Law 97
Covered since 2024 (DOB's list, March 1, 2026).
Bedbug report
Filed February 10, 2026, for the year to October 31, 2025. 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
Class B2 open
Notice sent19268904
MoldDefect letter sent18430171
OATH/ECB1 open
Elevators, Class 2Decided by default39133886K

The full report on 523 Lexington Ave, Manhattan

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Questions about this building

Does 523 Lexington Avenue, Manhattan have open violations?

Yes. 523 Lexington Avenue, Manhattan had 3 open violations on October 10, 2026: 2 from HPD and 1 from OATH/ECB. None is Class C, the class HPD treats as immediately hazardous. The oldest open HPD violation has been open 14 months, since July 23, 2025.

Are any DOB work permits in effect at 523 Lexington Avenue, Manhattan?

Yes. 1 DOB work permit in effect, for General Construction work, issued March 24, 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.

What is the ENERGY STAR score for 523 Lexington Avenue, Manhattan?

ENERGY STAR score 74 for 2024, against a median of 77 for Residence Hall/Dormitory 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 523 Lexington Avenue, Manhattan last file its bedbug report?

On February 10, 2026, 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 523 Lexington Avenue, Manhattan covered by Local Law 97?

Yes. It is on DOB's Local Law 97 covered buildings list. Covered since 2024 (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 523 Lexington Avenue, Manhattan built?

The city's record gives 1923 as the year 523 Lexington Avenue, Manhattan was built, in the Department of City Planning's PLUTO tax-lot file. The same file classes it as a condominium with 34 floors.

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, DOB NOW work permits, 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 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, DOB NOW work permits, 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, 523 Lexington Ave, Manhattan: 3 open violations, from New York City's HPD violation and OATH/ECB hearing data. Figures through October 10, 2026. https://violationscout.com/building/523-lexington-avenue-manhattan

How we count: /method.

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