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Brooklyn • Library

1901 Mermaid Ave

Brooklyn, NY 11224Government-ownedBBL 3070190043BIN 3189001
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Updated Aug 1, 2026 · 16 sources

Year Built1955
Floors2
Units1
Building Area11,000 sqft
ZoningR5
ClassP8
Market Value$2.7M

1901 MERMAID AVE is a property located at 1901 MERMAID AVE, Brooklyn, NY 11224. It is classified as a library. The building was constructed in 1955. It has 2 floors and 1 unit. The building area is 11,000 square feet on a 9,012 sqft lot. The property is zoned R5. The assessed market value is $2.7M. Public records list the property as government-owned. There are 45 building permits on record (30 active). There are 17 violations on record (2 currently open). 4 docketed judgments 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

123records on file

Completed in 1955, 1901 Mermaid Ave rises 2 stories over Kings. Public records put it at 1 unit and 11,000 square feet of floor area, on land zoned R5. It is carried on the public rolls at a market value of $2.7M, and assessed for tax at $1.2M. In the 36 years its record reaches back, the lot has drawn 123 separate government filings.

The documentary life of the address leans hard toward permit: 45 of its 123 records, fully 37%, fall under that one heading. Inspection (22) and enforcement (18) trail well behind. 2 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 2023.

On the environmental ledger, the building is benchmarked under Local Law 84, with a site energy-use intensity of 68.9 kBtu per square foot. Its operations answer for roughly 75 metric tons of CO2-equivalent a year.

Read together — 37% permit, 36 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$2.7M of Kings, written across 123 government filings.

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Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
updated

Property Details

Address1901 MERMAID AVE, Brooklyn, NY 11224
Building TypeLibrary
P8
Year Built1955
Floors2
Total Units1
Building Area11,000 sqft
Lot Size9,012 sqft
ZoningR5
ConditionN/A
3070190043
3189001
OwnershipGovernment-owned

Assessment & Sales

$2.7M
$1.2M
$114K

Building Permits

45 on record · 30 active
Mechanical SystemsDOB NOW
PERMIT ISSUED
Filed Jan 8, 2025Est. cost $60KJob #B01138871-I1

Initial Permit

View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Jan 8, 2025Est. cost $60KJob #B01138871-I1
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Mar 28, 2024Est. cost $218KJob #340814097-01

SOLAR TAX

View this permit's full record & inspection history →
Cats RegistrationOther
CURRENT
Filed Nov 9, 2023Job #409214
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Sep 13, 2023Est. cost $343KJob #321751555-01

GEN. CONSTR.

View this permit's full record & inspection history →

+ 40 more permits — view full report

Violations

17 on record · 2 open
Judgments · 4 docketed
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Sep 30, 2025Ticket #012164878M
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Dec 31, 2024Ticket #012153597M
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2022Ticket #012112166J
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2022Ticket #039032874K
FAIL MAINTAIN BLDG IN COMPLIANT MANNER: SERVICE EQUIPMENT - BOILER
DOB LegacyElevator
ACTIVE
Issued Jun 1, 2016#2062953

FAILURE TO PERFORM CATEGORY 5 INSPECTION

View this violation's full details & status history →
DOB LegacyLocal Law 62/91
ACTIVE
Issued Aug 16, 1993#224515
View this violation's full details & status history →

+ 15 more violations on record — view full report

Get the Complete Report for 1901 MERMAID AVE

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

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Frequently Asked Questions

When was 1901 MERMAID AVE, Brooklyn built?

The building at 1901 MERMAID AVE, Brooklyn, NY 11224 was constructed in 1955. It is classified as a library with 2 floors and 1 unit. The building area is 11,000 sqft.

Are there building permits at 1901 MERMAID AVE, Brooklyn?

Yes. 1901 MERMAID AVE, Brooklyn, NY 11224 has 45 building permits on record, with 30 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Mechanical Systems (PERMIT ISSUED) filed Jan 8, 2025.

Does 1901 MERMAID AVE, Brooklyn have violations?

Yes. 1901 MERMAID AVE, Brooklyn, NY 11224 has 17 violations on record, with 2 currently open. Breakdown: 16 DOB, 1 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 1901 MERMAID AVE, Brooklyn have docketed judgments?

Yes. 1901 MERMAID AVE, Brooklyn, NY 11224 has 4 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH). 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 1901 MERMAID AVE?

1901 MERMAID AVE, Brooklyn, NY 11224 has an assessed market value of $2.7M and a total assessed value of $1.2M (land: $114K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 1901 MERMAID AVE?

1901 MERMAID AVE, Brooklyn, NY 11224 is zoned R5. 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 1901 MERMAID AVE?

1901 MERMAID AVE, Brooklyn, NY 11224 is government-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 1901 MERMAID AVE?

Search 1901 MERMAID AVE 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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1901 MERMAID AVE, Brooklyn, NY 11224 — Property Records, Permits, Violations, Tax & Zoning | RegWatch