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Brooklyn • Office

55 Prospect St

Brooklyn, NY 11201Company-ownedBBL 3000630001BIN 3000161
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Updated Aug 1, 2026 · 16 sources

Year Built1967
Floors10
Units48
Building Area256,057 sqft
ZoningM1-6
ClassO6
Market Value$55.3M

55 PROSPECT ST is a property located at 55 PROSPECT ST, Brooklyn, NY 11201. It is classified as a office - loft/mixed use. The building was constructed in 1967. It has 10 floors and 48 units. The building area is 256,057 square feet on a 20,704 sqft lot. The property is zoned M1-6. The assessed market value is $55.3M. It last sold for $138.1M on Mar 31, 2017. Public records list the property as company-owned. There are 341 building permits on record (218 active). There are 67 violations on record (0 currently open). 12 docketed judgments carrying $1,000 in open balances are on record with OATH. Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

813records on file
67Energy Star

Completed in 1967, 55 Prospect St rises 10 stories over Kings. Public records put it at 48 units and 256,057 square feet of floor area, on land zoned M1-6. It is carried on the public rolls at a market value of $55.3M, and assessed for tax at $24.9M. In the 39 years its record reaches back, the lot has drawn 813 separate government filings — a paper trail nearly as tall as the building itself.

The documentary life of the address leans hard toward permit: 341 of its 813 records, fully 42%, fall under that one heading. Complaint (200) and inspection (80) trail well behind. No violations stand open against it today.

The pace is anything but even. The early decades pass in near silence; the filings cluster heavily in recent years, peaking in 2026.

On the environmental ledger, the building posts an Energy Star score of 67, with a site energy-use intensity of 54.5 kBtu per square foot. Its operations answer for roughly 1,250 metric tons of CO2-equivalent a year.

Read together — 42% permit, 39 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$55.3M of Kings, written across 813 government filings.

Open the live report — daily-updated data, AI chat & alerts
Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
updated

Property Details

Address55 PROSPECT ST, Brooklyn, NY 11201
Building TypeOffice - Loft/Mixed Use
O6
Year Built1967
Floors10
Total Units48
Building Area256,057 sqft
Lot Size20,704 sqft
ZoningM1-6
3000630001
3000161
OwnershipCompany-owned

Assessment & Sales

$55.3M
$24.9M
$545K
$138.1M
Last Sale DateMar 31, 2017

Building Permits

341 on record · 218 active
General ConstructionDOB NOW
APPROVED
Filed Dec 2, 2025Est. cost $779KJob #B00647023-P1
View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Dec 2, 2025Est. cost $779KJob #B00647023-I1
View this permit's full record & inspection history →
Place of AssemblyDOB Legacy
COMPLETED
Filed Jan 10, 2024Job #321643897-01
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Jul 24, 2023Est. cost $10KJob #321408231-01

STRUCTURAL

View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed May 31, 2023Est. cost $906KJob #B00455900-I1
View this permit's full record & inspection history →

+ 336 more permits — view full report

Violations

67 on record · none currently open
Open judgment balance — docketed OATH judgments$1,000
Judgments · 12 docketed
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2025Ticket #012154679K
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
Health summons (OATH)JUDGMENT DOCKETED
Docketed Oct 31, 2023Ticket #0890795346
VENDING IN BUS STOP, SIDEWALK NEXT TO A HOSPITAL OR HEALTH FACILITY
DOB summons (OATH)JUDGMENT DOCKETED
Docketed May 31, 2023Ticket #039075618L
FAILURE TO MAINTAIN ELEVATOR OR CONVEYING SYSTEM
Health summons (OATH)JUDGMENT DOCKETED
Docketed Sep 30, 2023Balance $1,000Ticket #0890732260
OPERATING A MFVU UNIT WITHOUT A PERMIT IN ANY PUBLIC SPACE
Health summons (OATH)JUDGMENT DOCKETED
Docketed Nov 30, 2019Ticket #0890640750
ITEMS NOT IN OR UNDER CART EXCEPT WASTE CONTAINER

+ 7 more docketed judgments — view full report

ECBElevator
RESOLVE
Issued Dec 14, 2022#39075618L

RETURN DEVICE TO SERVICE IMMEDIATELY. YOU CAN CONTACT NYC DOB AT [email protected] FOR A COMPLETE INSPECTION.

View this violation's full details & status history →
DOB LegacyEARCX
DISMISSED
Issued Jun 20, 2021#2531019

FAILURE TO SUBMIT AN EER PER AD. CODE SEC. 28-308.4 - MULTIPLE YEARS (2020)

View this violation's full details & status history →
DOB LegacyEARCX
DISMISSED
Issued Jun 19, 2021#2530268

FAILURE TO SUBMIT AN EER PER AD. CODE SEC. 28-308.4 - MULTIPLE YEARS (2019)

View this violation's full details & status history →
DOB LegacyEARCX
DISMISSED
Issued Jun 18, 2021#2530059

FAILURE TO SUBMIT AN EER PER AD. CODE SEC. 28-308.4 - MULTIPLE YEARS (2018)

View this violation's full details & status history →
DOB LegacyEARCX
DISMISSED
Issued Jun 17, 2021#2529787

FAILURE TO SUBMIT AN EER PER AD. CODE SEC. 28-308.4 - MULTIPLE YEARS (2017)

View this violation's full details & status history →

+ 62 more violations on record — view full report

Get the Complete Report for 55 PROSPECT ST

Title history, detailed tax records, environmental data, zoning analysis, and more from 250+ government sources.

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Frequently Asked Questions

When was 55 PROSPECT ST, Brooklyn built?

The building at 55 PROSPECT ST, Brooklyn, NY 11201 was constructed in 1967. It is classified as a office - loft/mixed use with 10 floors and 48 units. The building area is 256,057 sqft.

Are there building permits at 55 PROSPECT ST, Brooklyn?

Yes. 55 PROSPECT ST, Brooklyn, NY 11201 has 341 building permits on record, with 218 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a General Construction (APPROVED) filed Dec 2, 2025.

Does 55 PROSPECT ST, Brooklyn have violations?

Yes. 55 PROSPECT ST, Brooklyn, NY 11201 has 67 violations on record, with 0 currently open. Breakdown: 58 DOB, 9 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 55 PROSPECT ST, Brooklyn have docketed judgments?

Yes. 55 PROSPECT ST, Brooklyn, NY 11201 has 12 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $1,000. A docketed judgment is an enforceable money judgment entered by OATH after a hearing on a summons issued at this property; where the respondent is the property owner it can attach to the property as a lien.

What is the property tax assessment for 55 PROSPECT ST?

55 PROSPECT ST, Brooklyn, NY 11201 has an assessed market value of $55.3M and a total assessed value of $24.9M (land: $545K). Assessment data is from the NYC Department of Finance (DOF).

When was 55 PROSPECT ST last sold?

55 PROSPECT ST, Brooklyn, NY 11201 last sold for $138.1M on Mar 31, 2017. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 55 PROSPECT ST?

55 PROSPECT ST, Brooklyn, NY 11201 is zoned M1-6. Zoning data is from the NYC Department of City Planning (DCP). For detailed FAR, overlays, and development rights, view the full property report on RegWatch.

Who owns 55 PROSPECT ST?

55 PROSPECT ST, Brooklyn, NY 11201 is company-owned according to public records. Ownership data is from NYC Department of Finance assessment rolls. View the current owner of record and registered contacts in the full property report on RegWatch.

How do I get a full property report for 55 PROSPECT ST?

Search 55 PROSPECT ST on RegWatch to see its public record free — violations, permits, tax records, zoning, environmental data, and more from 250+ government sources, no credit card required. A Full Analysis report adds the complete title history, owner contacts, and a downloadable PDF.

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55 PROSPECT ST, Brooklyn, NY 11201 — Property Records, Permits, Violations, Tax & Zoning | RegWatch