Brooklyn • Elevator Apartment

503 Union Ave

Brooklyn, NY 11211Company-ownedBBL 3023150021BIN 3061860
Year Built1930
Floors5
Units24
Building Area36,888 sqft
ZoningM1-2/R6
ClassD5
Market Value$7.3M

503 UNION AVE is a property located at 503 UNION AVE, Brooklyn, NY 11211. It is classified as a elevator apartment - converted. The building was constructed in 1930. It has 5 floors and 24 units. The building area is 36,888 square feet on a 10,387 sqft lot. The property is zoned M1-2/R6. The assessed market value is $7.3M. Public records list the property as company-owned. There are 47 building permits on record (21 active). There are 46 violations on record (4 currently open). 14 docketed judgments carrying $550 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

229records on file
87Energy Star

Completed in 1930, 503 Union Ave rises 5 stories over Kings. Public records put it at 24 units and 36,888 square feet of floor area, on land zoned M1-2/R6. It is carried on the public rolls at a market value of $7.3M, and assessed for tax at $3.3M. In the 51 years its record reaches back, the lot has drawn 229 separate government filings.

The documentary life of the address leans hard toward permit: 47 of its 229 records, fully 21%, fall under that one heading. Violation (46) and enforcement (44) trail well behind. 4 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 2017.

On the environmental ledger, the building posts an Energy Star score of 87, with a site energy-use intensity of 56.7 kBtu per square foot. Its operations answer for roughly 221 metric tons of CO2-equivalent a year.

Read together — 21% permit, 51 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$7.3M of Kings, written across 229 government filings.

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Executive summary, compliance history, title chain & existing debt, recorded documents & agreements, owner contacts, tax detail, Use & Development, build envelope, market comps, investment metrics, deal math & stress tests, deal signals, pre-foreclosure signals, neighborhood. Downloadable PDF. One payment, no subscription.

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Property Details

Address503 UNION AVE, Brooklyn, NY 11211
Building TypeElevator Apartment - Converted
D5
Year Built1930
Floors5
Total Units24
Building Area36,888 sqft
Lot Size10,387 sqft
ZoningM1-2/R6
ConditionAverage
3023150021
3061860 +2 more
OwnershipCompany-owned

Assessment & Sales

$7.3M
$3.3M
$421K

Building Permits

47 on record · 21 active
General ConstructionDOB NOW
LOC ISSUED
Filed Jun 20, 2023Est. cost $8KJob #B00463618-S1
ElectricalDOB NOW
CANCELLED
Filed Apr 3, 2022Job #B00711557-I1-EL

Run circuits for EV chargers from existing panel.

View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Sep 15, 2021Est. cost $5KJob #B00463618-I1
General ConstructionDOB NOW
APPROVED
Filed Aug 10, 2021Est. cost $5KJob #B00463618-P2
PlumbingDOB NOW
SIGNED-OFF
Filed Jun 2, 2021Est. cost $5KJob #B00463618-I1

+ 42 more permits — view full report

Violations

46 on record · 4 open
Open judgment balance — docketed OATH judgments$550
Judgments · 14 docketed
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2026Balance $125Ticket #048789039H
ILLEGAL POSTING OF HANDBILL NOTICE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2026Balance $125Ticket #048789040P
ILLEGAL POSTING OF HANDBILL NOTICE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Oct 31, 2024Ticket #048381449L
LOOSE RUBBISH 1ST OCCURRENCE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Aug 31, 2024Ticket #048148100H
STORAGE OF RECEPTACLES PLACED OUT PRIOR TO 8PM WITHOUT A RECEPTACLE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2024Ticket #048116380P
STORAGE OF RECEPTACLES PLACED OUT PRIOR TO 8PM WITHOUT A RECEPTACLE

+ 9 more docketed judgments — view full report

SafetyElevator
ACTIVE
Issued Oct 2, 2026#VIO-FTF-VT-PER-202512-0003857

Violation Issued-Failure To File 2025 Periodic Inspection Report

View this violation's full details & status history →
SafetyElevator
ACTIVE
Issued Aug 29, 2025#VIO-FTF-VT-CAT1-202412-0005188

Violation Issued-Failure To File 2024 Cat1 Test Report

View this violation's full details & status history →
SafetyElevator
ACTIVE
Issued Aug 11, 2023#VIO-FTF-VT-CAT1-202212-0006609

Violation Issued-Failure To File 2022 Cat1 Test Report

View this violation's full details & status history →

+ 43 more violations on record — view full report

Get the Complete Report for 503 UNION 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 503 UNION AVE, Brooklyn built?

The building at 503 UNION AVE, Brooklyn, NY 11211 was constructed in 1930. It is classified as a elevator apartment - converted with 5 floors and 24 units. The building area is 36,888 sqft.

Are there building permits at 503 UNION AVE, Brooklyn?

Yes. 503 UNION AVE, Brooklyn, NY 11211 has 47 building permits on record, with 21 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 Jun 20, 2023.

Does 503 UNION AVE, Brooklyn have violations?

Yes. 503 UNION AVE, Brooklyn, NY 11211 has 46 violations on record, with 4 currently open. Breakdown: 4 DOB Safety, 13 DOB, 25 ECB, 4 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 503 UNION AVE, Brooklyn have docketed judgments?

Yes. 503 UNION AVE, Brooklyn, NY 11211 has 14 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $550. 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 503 UNION AVE?

503 UNION AVE, Brooklyn, NY 11211 has an assessed market value of $7.3M and a total assessed value of $3.3M (land: $421K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 503 UNION AVE?

503 UNION AVE, Brooklyn, NY 11211 is zoned M1-2/R6. 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 503 UNION AVE?

503 UNION AVE, Brooklyn, NY 11211 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 503 UNION AVE?

Search 503 UNION 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 ($15, one-time) adds the complete title history, owner contacts, and a downloadable PDF.

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503 UNION AVE, Brooklyn, NY 11211 — Property Records, Permits, Violations, Tax & Zoning | RegWatch