Brooklyn • One Family Dwelling

521 East 42 St

Brooklyn, NY 11203Individually ownedBBL 3049590059BIN 3112022

Updated Aug 1, 2026 · 16 sources

Year Built1940
Floors1
Units1
Building Area909 sqft
ZoningR4
ClassA5
Market Value$524K

521 EAST 42 ST is a property located at 521 EAST 42 ST, Brooklyn, NY 11203. It is classified as a one family dwelling - attached or semi-detached. The building was constructed in 1940. It has 1 floor and 1 unit. The building area is 909 square feet on a 2,150 sqft lot. The property is zoned R4. The assessed market value is $524K. It last sold for $398K on Dec 14, 2006. Public records list the property as individually owned. There are 1 building permit on record (1 active). Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

21records on file

Completed in 1940, 521 East 42 St rises 1 story over Kings. Public records put it at 1 unit and 909 square feet of floor area, on land zoned R4. It is carried on the public rolls at a market value of $524K, and assessed for tax at $31.4K. In the 41 years its record reaches back, the lot has drawn 21 separate government filings.

The documentary life of the address leans hard toward mortgage: 6 of its 21 records, fully 29%, fall under that one heading. Sale (4) and release (3) 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 2006.

Read together — 29% mortgage, 41 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$524K of Kings, written across 21 government filings.

Property Details

Address521 EAST 42 ST, Brooklyn, NY 11203
Building TypeOne Family Dwelling - Attached or Semi-Detached
A5
Year Built1940
Floors1
Total Units1
Building Area909 sqft
Lot Size2,150 sqft
ZoningR4
ConditionAverage
3049590059
3112022
OwnershipIndividually owned

Assessment & Sales

$524K
$31K
$12K
$398K
Last Sale DateDec 14, 2006

Building Permits

1 on record · 1 active
ElectricalDOB NOW
PERMIT ISSUED
Filed Aug 23, 2021Job #B00581623-I1-EL

Violations

none on record

No violations found in local records.

Get the Complete Report for 521 EAST 42 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 521 EAST 42 ST, Brooklyn built?

The building at 521 EAST 42 ST, Brooklyn, NY 11203 was constructed in 1940. It is classified as a one family dwelling - attached or semi-detached with 1 floor and 1 unit. The building area is 909 sqft.

Are there building permits at 521 EAST 42 ST, Brooklyn?

Yes. 521 EAST 42 ST, Brooklyn, NY 11203 has 1 building permit on record, with 1 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Electrical (PERMIT ISSUED) filed Aug 23, 2021.

Does 521 EAST 42 ST, Brooklyn have violations?

No violations were found in local records for 521 EAST 42 ST, Brooklyn, NY 11203. Violation data is sourced from DOB (safety and legacy), HPD (housing), and ECB (environmental control).

Does 521 EAST 42 ST, Brooklyn have docketed judgments?

No docketed OATH judgments were found in local records for 521 EAST 42 ST, Brooklyn, NY 11203. Judgment data is sourced from NYC Office of Administrative Trials & Hearings (OATH) hearing records.

What is the property tax assessment for 521 EAST 42 ST?

521 EAST 42 ST, Brooklyn, NY 11203 has an assessed market value of $524K and a total assessed value of $31K (land: $12K). Assessment data is from the NYC Department of Finance (DOF).

When was 521 EAST 42 ST last sold?

521 EAST 42 ST, Brooklyn, NY 11203 last sold for $398K on Dec 14, 2006. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 521 EAST 42 ST?

521 EAST 42 ST, Brooklyn, NY 11203 is zoned R4. 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 521 EAST 42 ST?

521 EAST 42 ST, Brooklyn, NY 11203 is individually 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 521 EAST 42 ST?

Search 521 EAST 42 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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521 EAST 42 ST, Brooklyn, NY 11203 — Property Records, Permits, Violations, Tax & Zoning | RegWatch