Skip to content

Brooklyn • Condo

309 Kosciuszko St

Brooklyn, NY 11221BBL 3017821001BIN 3049689
Save buildingView report

16 sources

Year Built1931
Floors4
Units43
Building Area30,193 sqft
ZoningR6B
ClassRM
Market Value$4.5M

309 KOSCIUSZKO ST is a property located at 309 KOSCIUSZKO ST, Brooklyn, NY 11221. It is classified as a condo - multi-dwelling. The building was constructed in 1931. It has 4 floors and 43 units. The building area is 30,193 square feet on a 10,000 sqft lot. The property is zoned R6B. The assessed market value is $4.5M. It last sold for $1.4M on Mar 4, 2010. There are 27 building permits on record (15 active). There are 16 violations on record (1 currently open). 7 docketed judgments carrying $2,100 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

168records on file
91Energy Star

Completed in 1931, 309 Kosciuszko St rises 4 stories over Kings. Public records put it at 43 units and 30,193 square feet of floor area, on land zoned R6B. It is carried on the public rolls at a market value of $4.5M, and assessed for tax at $2.0M. In the 43 years its record reaches back, the lot has drawn 168 separate government filings.

The documentary life of the address leans hard toward inspection: 36 of its 168 records, fully 21%, fall under that one heading. Enforcement (36) and permit (27) trail well behind. 1 violation stands 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 2014.

On the environmental ledger, the building posts an Energy Star score of 91, with a site energy-use intensity of 33.5 kBtu per square foot. Its operations answer for roughly 102 metric tons of CO2-equivalent a year.

Read together — 21% inspection, 43 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$4.5M of Kings, written across 168 government filings.

Open the live report — daily-updated data, AI chat & alerts
Full Analysis report · $15 one-time

Get the full report for 309 Kosciuszko St

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.

Get the $15 report
Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
latest record

Property Details

Address309 KOSCIUSZKO ST, Brooklyn, NY 11221
Building TypeCondo - Multi-Dwelling
RM
Year Built1931
Floors4
Total Units43
Building Area30,193 sqft
Lot Size10,000 sqft
ZoningR6B
ConditionAverage
3017821001
3049689

Assessment & Sales

$4.5M
$2M
$375K
$1.4M
Last Sale DateMar 4, 2010

Building Permits

27 on record · 15 active
ElevatorDOB NOW
SIGNED OFF
Filed May 22, 2019Job #B00158297-I1
View this permit's full record & inspection history →
General ConstructionDOB Legacy
COMPLETED
Filed Dec 11, 2014Job #321042894-01
View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Dec 8, 2014Est. cost $2.7MJob #320283652-01

GEN. CONSTR

View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Dec 8, 2014Job #320283652-03

STRUCTURAL

View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Dec 8, 2014Job #320283652-02

GENERAL

View this permit's full record & inspection history →

+ 22 more permits — view full report

Violations

16 on record · 1 open
Open judgment balance — docketed OATH judgments$2,100
Judgments · 7 docketed
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Oct 31, 2021Balance $300Ticket #047183033Y
LOOSE RUBBISH
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2021Balance $300Ticket #046927733H
LOOSE RUBBISH
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Nov 30, 2020Balance $300Ticket #0211074041
IMPROPER DISPOSAL BEDDING 1ST OFFENSE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2020Balance $300Ticket #0210103401
DIRTY SIDEWALK DIRTY AREA
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2016Ticket #041976563N
LOOSE RUBBISH

+ 2 more docketed judgments — view full report

SafetyElevator
ACTIVE
Issued Aug 25, 2023#VIO-FTF-VT-PER-202212-0004638

Violation Issued-Failure To File 2022 Periodic Inspection Report

View this violation's full details & status history →

+ 15 more violations on record — view full report

Get the Complete Report for 309 KOSCIUSZKO ST

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

Free to view core records, no credit card required — the paid report adds title history & analysis.

View Report

Frequently Asked Questions

When was 309 KOSCIUSZKO ST, Brooklyn built?

The building at 309 KOSCIUSZKO ST, Brooklyn, NY 11221 was constructed in 1931. It is classified as a condo - multi-dwelling with 4 floors and 43 units. The building area is 30,193 sqft.

Are there building permits at 309 KOSCIUSZKO ST, Brooklyn?

Yes. 309 KOSCIUSZKO ST, Brooklyn, NY 11221 has 27 building permits on record, with 15 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Elevator (SIGNED OFF) filed May 22, 2019.

Does 309 KOSCIUSZKO ST, Brooklyn have violations?

Yes. 309 KOSCIUSZKO ST, Brooklyn, NY 11221 has 16 violations on record, with 1 currently open. Breakdown: 1 DOB Safety, 6 DOB, 7 ECB, 2 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 309 KOSCIUSZKO ST, Brooklyn have docketed judgments?

Yes. 309 KOSCIUSZKO ST, Brooklyn, NY 11221 has 7 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $2,100. 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 309 KOSCIUSZKO ST?

309 KOSCIUSZKO ST, Brooklyn, NY 11221 has an assessed market value of $4.5M and a total assessed value of $2M (land: $375K). Assessment data is from the NYC Department of Finance (DOF).

When was 309 KOSCIUSZKO ST last sold?

309 KOSCIUSZKO ST, Brooklyn, NY 11221 last sold for $1.4M on Mar 4, 2010. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 309 KOSCIUSZKO ST?

309 KOSCIUSZKO ST, Brooklyn, NY 11221 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.

How do I get a full property report for 309 KOSCIUSZKO ST?

Search 309 KOSCIUSZKO 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 ($15, one-time) adds the complete title history, owner contacts, and a downloadable PDF.

Search Another Property

Look up violations, permits, and records for any tri-state address.

Related searches
Brooklyn Property Search →Brooklyn Permit Search →Brooklyn Violation Lookup →Brooklyn Tax Search →Brooklyn Title Search →Brooklyn Zoning Lookup →NYC Permit Search →NYC Violation Lookup →NYC Property Tax →NYC Zoning Lookup →NYC Compliance Deadlines →NYC Violation Types →Free Property Search →Data Sources →Class R Buildings Guide →
309 KOSCIUSZKO ST, Brooklyn, NY 11221 — Property Records, Permits, Violations, Tax & Zoning | RegWatch