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Brooklyn • Elevator Apartment

721 Hart St

Brooklyn, NY 11221Company-ownedBBL 3032180042BIN 3073141
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Updated Aug 1, 2026 · 16 sources

Year Built2017
Floors5
Units33
Building Area26,581 sqft
ZoningR6
ClassD6
Market Value$5.1M

721 HART ST is a property located at 721 HART ST, Brooklyn, NY 11221. It is classified as a elevator apartment - fireproof with stores. The building was constructed in 2017. It has 5 floors and 33 units. The building area is 26,581 square feet on a 10,000 sqft lot. The property is zoned R6. The assessed market value is $5.1M. It last sold for $4.3M on Jan 11, 2016. Public records list the property as company-owned. There are 19 building permits on record (10 active). There are 27 violations on record (12 currently open). 26 docketed judgments carrying $15,550 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

217records on file
76Energy Star

Completed in 2017, 721 Hart St rises 5 stories over Kings. Public records put it at 33 units and 26,581 square feet of floor area, on land zoned R6. It is carried on the public rolls at a market value of $5.1M, and assessed for tax at $2.3M. In the 59 years its record reaches back, the lot has drawn 217 separate government filings.

The documentary life of the address leans hard toward inspection: 52 of its 217 records, fully 24%, fall under that one heading. Enforcement (31) and violation (27) trail well behind. 12 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 2016.

On the environmental ledger, the building posts an Energy Star score of 76, with a site energy-use intensity of 38.6 kBtu per square foot. Its operations answer for roughly 118 metric tons of CO2-equivalent a year.

Read together — 24% inspection, 59 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$5.1M of Kings, written across 217 government filings.

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

Property Details

Address721 HART ST, Brooklyn, NY 11221
Building TypeElevator Apartment - Fireproof With Stores
D6
Year Built2017
Floors5
Total Units33
Building Area26,581 sqft
Lot Size10,000 sqft
ZoningR6
ConditionAverage
3032180042
3073141
OwnershipCompany-owned

Assessment & Sales

$5.1M
$2.3M
$293K
$4.3M
Last Sale DateJan 11, 2016

Building Permits

19 on record · 10 active
DemolitionDOB Legacy
SIGNED OFF
Filed Apr 30, 2018Job #321276604-01
View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Aug 18, 2017Job #321265457-03
View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Aug 18, 2017Job #321265457-04
View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Aug 18, 2017Est. cost $5.5MJob #321265457-01

GEN. CONSTR.

View this permit's full record & inspection history →
Alteration — Type 1DOB Legacy
SIGNED OFF
Filed Aug 18, 2017Job #321265457-02

STRUCTURAL

View this permit's full record & inspection history →

+ 14 more permits — view full report

Violations

27 on record · 12 open
Open judgment balance — docketed OATH judgments$15,550
Judgments · 26 docketed
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Dec 31, 2025Balance $12,500Ticket #037031187L
MISCELLANEOUS VIOLATIONS
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Feb 29, 2024Balance $300Ticket #048042672H
STORAGE OF RECEPTACLES PLACED OUT PRIOR TO 8PM WITHOUT A RECEPTACLE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Feb 29, 2024Balance $300Ticket #047975973J
FAILURE TO CLEAN 18 INCHES INTO STREET
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2023Balance $300Ticket #047686490Y
FAILURE TO CLEAN 18 INCHES INTO STREET
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed May 31, 2023Balance $300Ticket #047667722K
DIRTY SIDEWALK

+ 21 more docketed judgments — view full report

DOB LegacyAEUHAZ1
ACTIVE
Issued Mar 5, 2025#2789965

FAILURE TO CERTIFY CORRECTION ON IMMEDIATELY HAZARDOUS (CLASS 1) ECB VIOLATION

View this violation's full details & status history →
ECBConstruction
ACTIVE
Issued Oct 1, 2024#37031187L

FAILURE TO SUBMIT THE REQUIRED PARKING STRUCTURE INITIAL OBSERVATION REPORT FOR AN EXISTING PARKING STRUCTURE OR A PERIODIC INSPECTION OF A PARKING STRUCTURE(PIPS) REPORT DOCUMENTING THE CONDITIONS OF PSID#B000

View this violation's full details & status history →
DOB LegacyEnergy Benchmarking
ACTIVE
Issued May 2, 2019#2360399

FAILURE TO FILE BENCHMARKING REPORT OF ENERGY USE AS PER AD. CODE SEC. 28-309.4

View this violation's full details & status history →
HPDClass A
NOV CERTIFIED LATE
Issued Feb 13, 2019#12909227

§ 27-2104 ADM CODE POST AND MAINTAIN A PROPER SIGN ON WALL OF ENTRANCE STORY SHOWING THE REGISTRATION NUMBER ASSIGNED BY THE DEPARTMENT AND THE ADDRESS OF THE BUILDING., 1st STORY

View this violation's full details & status history →
HPDClass A
NOV CERTIFIED LATE
Issued Feb 13, 2019#12909231

§ 27-2053 ADM CODE POST SIGN ON WALL OF ENTRANCE STORY BEARING NAME, ADDRESS INCLUDING APARTMENT NUMBER IF ANY, AND TELEPHONE NUMBER OF SUPERINTENDENT, JANITOR OR HOUSEKEEPER., 1st STORY

View this violation's full details & status history →

+ 22 more violations on record — view full report

Get the Complete Report for 721 HART 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 721 HART ST, Brooklyn built?

The building at 721 HART ST, Brooklyn, NY 11221 was constructed in 2017. It is classified as a elevator apartment - fireproof with stores with 5 floors and 33 units. The building area is 26,581 sqft.

Are there building permits at 721 HART ST, Brooklyn?

Yes. 721 HART ST, Brooklyn, NY 11221 has 19 building permits on record, with 10 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Demolition (SIGNED OFF) filed Apr 30, 2018.

Does 721 HART ST, Brooklyn have violations?

Yes. 721 HART ST, Brooklyn, NY 11221 has 27 violations on record, with 12 currently open. Breakdown: 6 DOB, 4 ECB, 17 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 721 HART ST, Brooklyn have docketed judgments?

Yes. 721 HART ST, Brooklyn, NY 11221 has 26 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $15,550. 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 721 HART ST?

721 HART ST, Brooklyn, NY 11221 has an assessed market value of $5.1M and a total assessed value of $2.3M (land: $293K). Assessment data is from the NYC Department of Finance (DOF).

When was 721 HART ST last sold?

721 HART ST, Brooklyn, NY 11221 last sold for $4.3M on Jan 11, 2016. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 721 HART ST?

721 HART ST, Brooklyn, NY 11221 is zoned 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 721 HART ST?

721 HART ST, Brooklyn, NY 11221 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 721 HART ST?

Search 721 HART 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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721 HART ST, Brooklyn, NY 11221 — Property Records, Permits, Violations, Tax & Zoning | RegWatch