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42 Adelphi St, Brooklyn, NY 11205 Property Records

New York City property record for 42 Adelphi St, Brooklyn, NY 11205

Property Summary

Property TypeMixed Use Commercial Office / Residential
Details6,322 sqft · built 1899
Lot Size0.103 acres (4,479 sqft)
Owner2 Individual Names on Record
Last Sale$1,350,000 (Dec 2013)
Tax Bill$12,343 (2025)
Deeds & MortgagesAug 2022 Mortgage
Aug 2022 Mortgage
APN02031-0050

Property Details

APN / Parcel Number

Primary APN02031-0050
Alternative APNs
  • 0705020310050
  • 3-02031-0050

Interior

Units2 Units
Stories2 Stories
Building Area6,322 sqft Gross Area
1st Floor Area900 sqft
Office4,678 sqft

Exterior

Year BuiltBuilt 1899
Effective Year BuiltEffective 2023
Architectural StyleDuplex Single
Construction TypeFrame
Lot Area4,479 sqft (0.103 acres)
Lot Dimensions55.9 ft deep x 80.2 ft wide

Location & Zoning

Account Number3-02031-0050
Street Address42 ADELPHI ST
CityBROOKLYN
StateNY
Zip11205-1102
Property CategoryCommercial
Property TypeCommercial > Office > Mixed Use Commercial Office / Residential
Local Zoning CodeM1-2
Legal Block2031
Legal Lot Number50
JurisdictionKINGS (BROOKLYN) NY
Township / Civil DivisionBROOKLYN
Census Block Group2
Census Block2003
Census Tract21100

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic DistrictWithin the Fort Greene Historic District (Boundary Increase)
listed 1984 · 379 contributing resources · NRIS 84002451

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

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 Record2 Individual Names on Record
Mailing Address42 ADELPHI ST, BROOKLYN, NY 11205-1102
Owner TypeIndividual

Deeds, Mortgages & Sale History

DateDocument
Aug 22, 2022Deed of Trust, Mortgage
CITIZENS BANK, N.A
Aug 22, 2022Deed of Trust, Mortgage
CITIZENS BANK, N.A

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleDec 27, 2013 · Amount on Record
Deed SaleDec 27, 2013 · Amount on Record
Prior SaleJan 21, 2000 · Amount on Record
Deed Document Number2013529034
Record UpdatedJun 8, 2026

August 2022: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionKINGS (BROOKLYN) NY
Property Address42 ADELPHI ST, BROOKLYN, NY 11205-1102
Transaction TypeMortgage
Record UpdatedAug 30, 2022

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000328354
DateAug 22, 2022
Instrument2022000328354
Lender
NameCITIZENS BANK, N.A
Address1 CITIZENS PLZ, PROVIDENCE, RI 02903
Agreement
AmountAmount Recorded

August 2022: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionKINGS (BROOKLYN) NY
Property Address42 ADELPHI ST, BROOKLYN, NY 11205-1102
Transaction TypeMortgage
Record UpdatedAug 30, 2022

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000328352
DateAug 22, 2022
Instrument2022000328352
Lender
NameCITIZENS BANK, N.A
Address1 CITIZENS PLZ, PROVIDENCE, RI 02903
Agreement
AmountAmount Recorded

Tax Assessment & Valuation

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

Property Jurisdictions

TypeName
StateNew York
CountyKings County
MunicipalityNew York City
Unified School DistrictNew York City Department Of Education (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$413,100 (+139.94%) Land $136,800 Building $276,300$918,000 (-68.01%) Land $304,000 Building $614,000
2025$12,343.00 (-29.14%)
2023$17,420.00$172,170 Land $125,670 Building $46,500$2,869,500 Land $2,094,500 Building $775,000

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 ZoneNot on file
Nearby Flood Policies8 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 RiskNot 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 SystemNEW YORK CITY SYSTEM
serves 8,271,000 people · EPA ID NY7003493
Water SourceSurface water
Last State InspectionDec 2025
Lead10 ppb (2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureUncovered finished water reservoir
currently in violation since Feb 2017
Monitoring and ReportingNone
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 788 locations within half a mile, as of December 31, 2025

ProviderMax 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
T-Mobile
Fixed Wireless		100 / 20

May also be available: Optimum, Skywire Networks, Starry.

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