306 Union St, Brooklyn, NY 11231 Property Records

New York City property record for 306 Union St, Brooklyn, NY 11231

Property Summary

Property Type	Multi-Family Dwellings
Details	4,620 sqft · built 1920
Lot Size	0.051 acres (2,200 sqft)
Owner	Company Name on Record
Last Sale	$4,100,000 (Nov 2018)
Tax Bill	$12,911 (2025)
Deeds & Mortgages	Oct 2019 Mortgage Nov 2021 Mortgage + 3 more
APN	`00435-0016`

Property Details

APN / Parcel Number

Primary APN	`00435-0016`
Alternative APNs	`0204004350016` `3-00435-0016`

Interior

Units	4 Units
Stories	3 Stories
Building Area	4,620 sqft Living Area
1st Floor Area	1,100 sqft

Exterior

Year Built	Built 1920
Effective Year Built	Effective 1920
Architectural Style	Multi-Family
Lot Area	2,200 sqft (0.051 acres)
Lot Dimensions	100 ft deep x 22 ft wide

Location & Zoning

Account Number	3-00435-0016
Street Address	306 UNION ST
City	BROOKLYN
State	NY
Zip	11231-0982
Property Category	Residential
Property Type	Residential > Multi-Unit > Multi-Family Dwellings
Local Zoning Code	R6B
Legal Block	435
Legal Lot Number	16
Jurisdiction	KINGS (BROOKLYN) NY
Township / Civil Division	BROOKLYN
Census Block Group	5
Census Block	5001
Census Tract	7500

Owner

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

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Company Name on Record
Mailing Address	306 UNION ST, BROOKLYN, NY 11231-0982
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Oct 25, 2019	Deed of Trust, Mortgage SANTANDER BANK, N A
Nov 30, 2021	Deed of Trust, Mortgage SANTANDER BANK, N.A.
Dec 11, 2019	Grant Deed, Transfer STEWART TITLE, STEWART TITLE INSURANCE CO
Oct 4, 2019	Loan Modification, Mortgage SANTANDER BK NA
Nov 29, 2018	Grant Deed, Transfer SANTANDER BK NA

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Nov 29, 2018 · Amount on Record
Deed Sale	Nov 29, 2018 · Amount on Record
Prior Sale	Oct 20, 2004 · Amount on Record
Deed Document Number	2018394981
Record Updated	Oct 29, 2026

October 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	KINGS (BROOKLYN) NY
Property Address	306 UNION ST, BROOKLYN, NY 11231-0982
Transaction Type	Mortgage
Record Updated	Oct 26, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	306 UNION ST, BROOKLYN, NY 11231-0982

Mortgage

Document Number	0000349654
Date	Oct 25, 2019
Instrument	2019000349654

Lender

Name	SANTANDER BANK, N A
Address	824 N MARKET ST STE 100, WILMINGTON, DE 19801

Agreement

Amount	Amount Recorded

November 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	KINGS (BROOKLYN) NY
Property Address	306 UNION ST, BROOKLYN, NY 11231-0982
Transaction Type	Mortgage
Record Updated	Oct 26, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000470049
Date	Nov 30, 2021
Instrument	2021000470049

Lender

Name	SANTANDER BANK, N.A.
Address	824 N MARKET ST, WILMINGTON, DE 19801

Agreement

Amount	Amount Recorded

December 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	KINGS (BROOKLYN) NY
Recording Date	Dec 11, 2019
Property Address	306 UNION ST, BROOKLYN, NY 11231-0982
Document Number	0000405620
Instrument Date	Nov 20, 2019
Instrument	405620
Transaction Type	Transfer
Record Updated	Dec 27, 2019
Title Company	STEWART TITLE, STEWART TITLE INSURANCE CO

Transaction

Tax	$0.00
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	306 UNION ST BROOKLYN NY 112310982, BROOKLYN, NY 11231-0982

October 2019: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	KINGS (BROOKLYN) NY
Property Address	306 UNION ST, BROOKLYN, NY 11231-0982
Document Number	0000349655
Instrument Date	Oct 4, 2019
Transaction Type	Mortgage
Record Updated	Nov 6, 2019
Title Company	EXCLUSIVE LAND SERVICES INC, EXCLUSIVE LAND SVCS INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	306 UNION ST BROOKLYN NY 112310982, BROOKLYN, NY 11231-0982

Mortgage

Document Number	0000349655
Date	Oct 25, 2019
Instrument	349655

Lender

Name	SANTANDER BK NA
Type	Bank
Address	824 N MARKET ST # 100, WILMINGTON, DE 19801-4937

Agreement

Amount	Amount Recorded
Term	360 Months
Due	Oct 24, 2049

Interest

Rate Type	Adjustable Rate
Rate	3.62%

November 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	KINGS (BROOKLYN) NY
Recording Date	Nov 29, 2018
Property Address	306 UNION ST, BROOKLYN, NY 11231-0982
Document Number	0000394981
Instrument Date	Nov 20, 2018
Instrument	394981
Transaction Type	Transfer
Record Updated	Dec 19, 2018
Title Company	APPELLATE LAND SERVICES, APPELLATE LAND SVCS

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$16,400.00
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	172 CLINTON ST BROOKLYN NY 112014624, BROOKLYN, NY 11201-4624

Mortgage

Document Number	394982
Date	Nov 29, 2018
Instrument	394982

Lender

Name	SANTANDER BK NA
Type	Bank
Address	WILMINGTON, DE 19801

Agreement

Amount	Amount Recorded
Term	360 Months
Due	Nov 28, 2048

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		$1,483,200 (+52.66%) Land $342,000 Building $1,141,200	$3,296,000 (+52.66%) Land $760,000 Building $2,536,000
2025	$12,911.00 (+16.62%)
2023	$11,071.00	$971,550 Land $342,000 Building $629,550	$2,159,000 Land $760,000 Building $1,399,000

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Not on file
Nearby Flood Policies	2 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; 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 1,577 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
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Starry Fixed Wireless	300 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: Optimum.

Nearby Properties on Union St

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures