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Brooklyn • Condo

370 Union St

Brooklyn, NY 11231Company-ownedBBL 3004367501BIN 3007283
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Updated Aug 1, 2026 · 16 sources

Year Built1910
Floors4
Units16
Building Area14,748 sqft
ZoningR6B
ClassR2
Market Value$215K

370 UNION ST is a property located at 370 UNION ST, Brooklyn, NY 11231. It is classified as a condo - residential unit in walk-up. The building was constructed in 1910. It has 4 floors and 16 units. The building area is 14,748 square feet on a 5,667 sqft lot. The property is zoned R6B. The assessed market value is $215K. It last sold for $1.6M on Apr 22, 2025. Public records list the property as company-owned. There are 26 building permits on record (12 active). There are 62 violations on record (13 currently open). Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

307records on file

Completed in 1910, 370 Union St rises 4 stories over Kings. Public records put it at 16 units and 14,748 square feet of floor area, on land zoned R6B. It is carried on the public rolls at a market value of $215K, and assessed for tax at $96.7K. In the 40 years its record reaches back, the lot has drawn 307 separate government filings.

The documentary life of the address leans hard toward complaint: 106 of its 307 records, fully 35%, fall under that one heading. Violation (62) and release (45) trail well behind. 13 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 2022.

Read together — 35% complaint, 40 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$215K of Kings, written across 307 government filings.

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

Property Details

Address370 UNION ST, Brooklyn, NY 11231
Building TypeCondo - Residential Unit in Walk-Up
R2
Year Built1910
Floors4
Total Units16
Building Area14,748 sqft
Lot Size5,667 sqft
ZoningR6B
ConditionAverage
3004367501
3007283
OwnershipCompany-owned

Assessment & Sales

$215K
$97K
$7K
$1.6M
Last Sale DateApr 22, 2025

Building Permits

26 on record · 12 active
General ConstructionDOB NOW
LOC ISSUED
Filed Apr 22, 2026Est. cost $46KJob #B01349400-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
APPROVED
Filed Apr 21, 2026Est. cost $46KJob #B01349400-P1
View this permit's full record & inspection history →
General ConstructionDOB NOW
SIGNED-OFF
Filed Jan 28, 2026Est. cost $46KJob #B01349400-I1

Initial Permit

View this permit's full record & inspection history →
Cats RegistrationOther
CURRENT
Filed Jul 25, 2025Job #468635
View this permit's full record & inspection history →
ElectricalDOB NOW
COMPLETE
Filed Oct 27, 2020Job #B00419728-I1-EL

WIRING FOR BOILER

View this permit's full record & inspection history →

+ 21 more permits — view full report

Violations

62 on record · 13 open
HPDClass C
NOT COMPLIED WITH
Issued Jul 28, 2025#18115442

§ 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES AT DOOR IN THE ENTRANCE LOCATED AT APT 2B, 2nd STORY, 2nd APARTMENT FROM WEST AT NORTH

View this violation's full details & status history →
DOB LegacyLBLVIO
ACTIVE
Issued Jun 30, 2023#2693110

VIOLATION ISSUED-FAILURE TO FILE 2020 EXTERNAL LOW PRESSURE INSPECTION

View this violation's full details & status history →
DOB LegacyLBLVIO
ACTIVE
Issued Jun 30, 2023#2712786

VIOLATION ISSUED-FAILURE TO FILE 2021 EXTERNAL LOW PRESSURE INSPECTION

View this violation's full details & status history →

+ 59 more violations on record — view full report

Get the Complete Report for 370 UNION 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 370 UNION ST, Brooklyn built?

The building at 370 UNION ST, Brooklyn, NY 11231 was constructed in 1910. It is classified as a condo - residential unit in walk-up with 4 floors and 16 units. The building area is 14,748 sqft.

Are there building permits at 370 UNION ST, Brooklyn?

Yes. 370 UNION ST, Brooklyn, NY 11231 has 26 building permits on record, with 12 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 (LOC ISSUED) filed Apr 22, 2026.

Does 370 UNION ST, Brooklyn have violations?

Yes. 370 UNION ST, Brooklyn, NY 11231 has 62 violations on record, with 13 currently open. Breakdown: 12 DOB, 3 ECB, 47 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 370 UNION ST, Brooklyn have docketed judgments?

No docketed OATH judgments were found in local records for 370 UNION ST, Brooklyn, NY 11231. Judgment data is sourced from NYC Office of Administrative Trials & Hearings (OATH) hearing records.

What is the property tax assessment for 370 UNION ST?

370 UNION ST, Brooklyn, NY 11231 has an assessed market value of $215K and a total assessed value of $97K (land: $7K). Assessment data is from the NYC Department of Finance (DOF).

When was 370 UNION ST last sold?

370 UNION ST, Brooklyn, NY 11231 last sold for $1.6M on Apr 22, 2025. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 370 UNION ST?

370 UNION ST, Brooklyn, NY 11231 is zoned R6B. 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 370 UNION ST?

370 UNION ST, Brooklyn, NY 11231 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 370 UNION ST?

Search 370 UNION 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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370 UNION ST, Brooklyn, NY 11231 — Property Records, Permits, Violations, Tax & Zoning | RegWatch