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Brooklyn • Elevator Apartment

51 Ainslie St

Brooklyn, NY 11211Individually ownedBBL 3023710044BIN 3396771
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16 sources

Year Built2009
Floors10
Units30
Building Area77,664 sqft
ZoningM1-2/R6
ClassD6
Market Value$20.3M

51 AINSLIE ST is a property located at 51 AINSLIE ST, Brooklyn, NY 11211. It is classified as a elevator apartment - fireproof with stores. The building was constructed in 2009. It has 10 floors and 30 units. The building area is 77,664 square feet on a 16,952 sqft lot. The property is zoned M1-2/R6. The assessed market value is $20.3M. It last sold for $1.4M on Jan 3, 2007. Public records list the property as individually owned. There are 133 building permits on record (100 active). There are 216 violations on record (64 currently open). 22 docketed judgments carrying $2,000 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

782records on file
98Energy Star

Completed in 2009, 51 Ainslie St rises 10 stories over Kings. Public records put it at 30 units and 77,664 square feet of floor area, on land zoned M1-2/R6. It is carried on the public rolls at a market value of $20.3M, and assessed for tax at $9.1M. In the 56 years its record reaches back, the lot has drawn 782 separate government filings.

The documentary life of the address leans hard toward violation: 216 of its 782 records, fully 28%, fall under that one heading. Complaint (204) and permit (133) trail well behind. 64 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 2010.

On the environmental ledger, the building posts an Energy Star score of 98, with a site energy-use intensity of 22.4 kBtu per square foot. Its operations answer for roughly 176 metric tons of CO2-equivalent a year.

Read together — 28% violation, 56 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$20.3M of Kings, written across 782 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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Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
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Property Details

Address51 AINSLIE ST, Brooklyn, NY 11211
Building TypeElevator Apartment - Fireproof With Stores
D6
Year Built2009
Floors10
Total Units30
Building Area77,664 sqft
Lot Size16,952 sqft
ZoningM1-2/R6
ConditionAverage
3023710044
3396771
OwnershipIndividually owned

Assessment & Sales

$20.3M
$9.1M
$725K
$1.4M
Last Sale DateJan 3, 2007

Building Permits

133 on record · 100 active
General ConstructionDOB NOW
OBJECTIONS
Filed Jul 2, 2026Est. cost $225KJob #B01406468-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
ON HOLD – ADMINISTRATIVE ACTION
Filed May 13, 2026Est. cost $225KJob #B01219156-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Jan 5, 2026Est. cost $3KJob #B01308534-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Nov 20, 2025Est. cost $60KJob #B01219156-S5
View this permit's full record & inspection history →
SignDOB NOW
SIGNED-OFF
Filed Nov 3, 2025Est. cost $3KJob #B01308534-I1

Initial Permit

View this permit's full record & inspection history →

+ 128 more permits — view full report

Violations

216 on record · 64 open
Open judgment balance — docketed OATH judgments$2,000
Judgments · 22 docketed
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2025Balance $2,000Ticket #014143257J
ROOFTOP ACCESS AND MEANS OF EGRESS
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Dec 31, 2024Ticket #039058541H
FAILURE TO MAINTAIN ELEVATOR OR CONVEYING SYSTEM
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2021Ticket #0211543449
FAILURE TO CLEAN 18 INCHES INTO STREET
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Nov 30, 2020Ticket #046211665L
DIRTY SIDEWALK DIRTY AREA
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2018Ticket #011628957R
INSPECTION AND TESTING

+ 17 more docketed judgments — view full report

HPDClass C
NOV SENT OUT
Issued Mar 23, 2026#18730114

§ 27-2029 ADM CODE PROVIDE AN ADEQUATE SUPPLY OF HEAT FOR THE APARTMENT IN THE ENTIRE APARTMENT LOCATED AT APT 9B, 9th STORY, 1st APARTMENT FROM EAST AT SOUTH

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HPDClass B
INVALID CERTIFICATION
Issued Feb 25, 2026#19041664

§ 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... LESS THAN 10 SQ FT AT THE CEILING, NORTH AND EAST WALL IN THE BATHROOM LOCATED AT APT 7B, 7th STORY, 1st APARTMENT FROM NORTH AT EAST ORIGINAL VIOLATION 18668488 ISSUED 25-FEB-26 HAS BEEN UPGRADED TO CLASS B PER ADMINISTRATIVE CODE 27-2017.3a(3)(a) or (b).

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DOB LegacyLBLVIO
ACTIVE
Issued Nov 14, 2025#2811095

VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTION

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DOB LegacyLBLVIO
ACTIVE
Issued Nov 14, 2025#2811096

VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTION

View this violation's full details & status history →
ECBLocal Law
ACTIVE
Issued Apr 8, 2025#37035060M

FAILURE TO SUBMIT AN ACCEPTABLE REQUIRED CYCLE 8C AND 9C REPORT OF CRITICAL EXAMINATION DOCUMENTING CONDITION OF EXTERIOR WALL AND APPURTENANCES REQUIRED BY 28-302.4 FOR CONTROL #918439. REMEDY: SUBMIT ACCEPTAB

View this violation's full details & status history →

+ 211 more violations on record — view full report

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

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Frequently Asked Questions

When was 51 AINSLIE ST, Brooklyn built?

The building at 51 AINSLIE ST, Brooklyn, NY 11211 was constructed in 2009. It is classified as a elevator apartment - fireproof with stores with 10 floors and 30 units. The building area is 77,664 sqft.

Are there building permits at 51 AINSLIE ST, Brooklyn?

Yes. 51 AINSLIE ST, Brooklyn, NY 11211 has 133 building permits on record, with 100 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 (OBJECTIONS) filed Jul 2, 2026.

Does 51 AINSLIE ST, Brooklyn have violations?

Yes. 51 AINSLIE ST, Brooklyn, NY 11211 has 216 violations on record, with 64 currently open. Breakdown: 6 DOB Safety, 66 DOB, 91 ECB, 53 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 51 AINSLIE ST, Brooklyn have docketed judgments?

Yes. 51 AINSLIE ST, Brooklyn, NY 11211 has 22 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $2,000. 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 51 AINSLIE ST?

51 AINSLIE ST, Brooklyn, NY 11211 has an assessed market value of $20.3M and a total assessed value of $9.1M (land: $725K). Assessment data is from the NYC Department of Finance (DOF).

When was 51 AINSLIE ST last sold?

51 AINSLIE ST, Brooklyn, NY 11211 last sold for $1.4M on Jan 3, 2007. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 51 AINSLIE ST?

51 AINSLIE ST, 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 51 AINSLIE ST?

51 AINSLIE ST, Brooklyn, NY 11211 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 51 AINSLIE ST?

Search 51 AINSLIE 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.

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51 AINSLIE ST, Brooklyn, NY 11211 — Property Records, Permits, Violations, Tax & Zoning | RegWatch