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Brooklyn

420 Adelphi St

Brooklyn, NY 11238Individually ownedBBL 3019571017BIN 3414100
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Updated Aug 1, 2026 · 16 sources

Floors4
ClassR2
Market Value$233K

420 ADELPHI ST is a property located at 420 ADELPHI ST, Brooklyn, NY 11238. The building has 4 floors. The assessed market value is $233K. It last sold for $480K on Apr 16, 2010. 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

85records on file
100Energy Star

The lot at 420 Adelphi St rises 4 stories over Kings. It is carried on the public rolls at a market value of $233K, and assessed for tax at $105K. In the 37 years its record reaches back, the lot has drawn 85 separate government filings.

The documentary life of the address leans hard toward release: 23 of its 85 records, fully 27%, fall under that one heading. Assignment (21) and mortgage (18) trail well behind. No violations stand open against it today.

The pace is anything but even. Activity is spread across the decades, with 1989 the busiest year on file.

On the environmental ledger, the building posts an Energy Star score of 100, with a site energy-use intensity of 19.8 kBtu per square foot. Its operations answer for roughly 161 metric tons of CO2-equivalent a year.

Read together — 27% release, 37 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$233K of Kings, written across 85 government filings.

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

Property Details

Address420 ADELPHI ST, Brooklyn, NY 11238
R2
Year BuiltN/A
Floors4
Total UnitsN/A
Building AreaN/A
Lot SizeN/A
3019571017
3414100
OwnershipIndividually owned

Assessment & Sales

$233K
$105K
$8K
$480K
Last Sale DateApr 16, 2010

Building Permits

1 on record · 1 active
Construction EquipmentDOB Legacy
ISSUED
Filed May 30, 2017Job #321563143-01-01

PL

View this permit's full record & inspection history →

Violations

none on record

No violations found in local records.

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Frequently Asked Questions

Are there building permits at 420 ADELPHI ST, Brooklyn?

Yes. 420 ADELPHI ST, Brooklyn, NY 11238 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 Construction Equipment (ISSUED) filed May 30, 2017.

Does 420 ADELPHI ST, Brooklyn have violations?

No violations were found in local records for 420 ADELPHI ST, Brooklyn, NY 11238. Violation data is sourced from DOB (safety and legacy), HPD (housing), and ECB (environmental control).

Does 420 ADELPHI ST, Brooklyn have docketed judgments?

No docketed OATH judgments were found in local records for 420 ADELPHI ST, Brooklyn, NY 11238. Judgment data is sourced from NYC Office of Administrative Trials & Hearings (OATH) hearing records.

What is the property tax assessment for 420 ADELPHI ST?

420 ADELPHI ST, Brooklyn, NY 11238 has an assessed market value of $233K and a total assessed value of $105K (land: $8K). Assessment data is from the NYC Department of Finance (DOF).

When was 420 ADELPHI ST last sold?

420 ADELPHI ST, Brooklyn, NY 11238 last sold for $480K on Apr 16, 2010. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

Who owns 420 ADELPHI ST?

420 ADELPHI ST, Brooklyn, NY 11238 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 420 ADELPHI ST?

Search 420 ADELPHI 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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420 ADELPHI ST, Brooklyn, NY 11238 — Property Records, Permits, Violations, Tax & Zoning | RegWatch