520 E 21st St, #102, Brooklyn, NY 11226 Property Records

New York City property record for 520 E 21st St, #102, Brooklyn, NY 11226

Property Summary

Property Type	Cooperative Housing Block
Details	103,494 sqft · built 1951
Lot Size	0.62 acres (27,000 sqft)
Owner	Company Name on Record
Last Sale	$26,500,000 (Apr 2015)
Tax Bill	$432,546 (2025)
Deeds & Mortgages	Apr 2019 Mortgage Apr 2019 Loan Modification
APN	`05184-0006`

Property Details

APN / Parcel Number

Primary APN	`05184-0006`
Alternative APNs	`1604051840006` `3-05184-0006`

Interior

Units	204 Units
Stories	6 Stories
Building Area	103,494 sqft Living Area
1st Floor Area	23,097 sqft

Exterior

Year Built	Built 1951
Effective Year Built	Effective 1951
Lot Area	27,000 sqft (0.62 acres)
Lot Dimensions	120 ft deep x 287 ft wide
View / Lot	Corner

Location & Zoning

Account Number	3-05184-0006
Street Address	520 E 21ST ST, 102
City	BROOKLYN
State	NY
Zip	11226-6864
Property Category	Residential
Property Type	Residential > Cooperative > Cooperative Housing Block
Local Zoning Code	R7A
Legal Block	5184
Legal Lot Number	6
Jurisdiction	KINGS (BROOKLYN) NY
Township / Civil Division	BROOKLYN
Census Block Group	1
Census Block	1001
Census Tract	51602

Owner

Source: New York City records, as of May 4, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on Record
Mailing Address	4711 12TH AVE, A8, BROOKLYN, NY 11219-2529
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Apr 12, 2019	Deed of Trust, Mortgage SANTANDER BANK N A
Apr 12, 2019	Loan Modification, Mortgage · Line of Credit SANTANDER BK NA

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Apr 22, 2015 · Amount on Record
Deed Sale	Apr 22, 2015 · Amount on Record
Prior Sale	Dec 24, 2013 · Amount on Record
Deed Document Number	2015134637
Prior Transfer Date	Jan 12, 2006
Prior Transfer Doc	0000043242
Record Updated	Jun 8, 2026

April 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	KINGS (BROOKLYN) NY
Property Address	520 E 21ST ST # 102, 102, BROOKLYN, NY 11226-6864
Transaction Type	Mortgage
Record Updated	Aug 19, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4711 12TH AVE A8, A8, BROOKLYN, NY 11219-2529

Mortgage

Document Number	0000118370
Date	Apr 12, 2019
Instrument	2019000118370

Lender

Name	SANTANDER BANK N A
Address	200 LIBERTY ST # 1717, NEW YORK, NY 10281

Agreement

Amount	Amount Recorded

April 2019: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	KINGS (BROOKLYN) NY
Recording Date	Apr 12, 2019
Property Address	520 E 21ST ST # 102, 102, BROOKLYN, NY 11226-6864
Instrument Date	Apr 11, 2019
Instrument	118371
Transaction Type	Mortgage
Record Updated	Apr 24, 2019
Title Company	CAPITAL ABSTRACT COMPANY INC, CAPITAL ABSTRACT CO INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	4711 12TH AVE #A8 BROOKLYN NY 112192529, A8, BROOKLYN, NY 11219-2529

Mortgage

Document Number	0000118371
Date	Apr 12, 2019
Instrument	118371

Lender

Name	SANTANDER BK NA
Type	Bank
Address	200 LIBERTY ST # 17TH, NEW YORK, NY 10281-1003

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

Source: New York City assessment roll, as of May 4, 2026

Property Jurisdictions

Type	Name
State	New York
County	Kings County
Municipality	New York City
Unified School District	New York City Department Of Education (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$3,712,950 (+0.88%) Land $789,750 Building $2,923,200	$8,251,000 (+0.88%) Land $1,755,000 Building $6,496,000
2025	$432,546.00 (-0.52%)
2023	$434,809.00	$3,680,550 Land $789,750 Building $2,890,800	$8,179,000 Land $1,755,000 Building $6,424,000

Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer

FEMA Flood Zone	Not on file

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	NEW YORK CITY SYSTEM serves 8,271,000 people · EPA ID NY7003493
Water Source	Surface water
Last State Inspection	Dec 2025
Lead	10 ppb (2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	Uncovered finished water reservoir currently in violation since Feb 2017
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 1,287 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Verizon Fiber · Fixed Wireless in parts of the area	2,300 / 2,300
Optimum Cable · Fiber in parts of the area	940 / 35
T-Mobile Fixed Wireless	100 / 20

May also be available: Starry.

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