18 Adelphi St, Brooklyn, NY 11205 Property Records

New York City property record for 18 Adelphi St, Brooklyn, NY 11205

Property Summary

Property Type	Duplex
Details	1,200 sqft · built 1899
Lot Size	0.019 acres (820 sqft)
Owner	2 Individual Names on File
Last Sale	$439,900 (Sep 2010)
Tax Bill	$2,345 (2025)
APN	`02031-0038`

Property Details

APN / Parcel Number

Primary APN	`02031-0038`
Alternative APNs	`0705020310038` `3-02031-0038`

Interior

Units	2 Units
Stories	2 Stories
Building Area	1,200 sqft Living Area
1st Floor Area	600 sqft

Exterior

Year Built	Built 1899
Effective Year Built	Effective 1899
Architectural Style	Duplex Single
Construction Type	Frame
Lot Area	820 sqft (0.019 acres)
Lot Dimensions	41.8 ft deep x 20 ft wide

Location & Zoning

Account Number	3-02031-0038
Street Address	18 ADELPHI ST
City	BROOKLYN
State	NY
Zip	11205-1102
Property Category	Residential
Property Type	Residential > Multi-Unit > Duplex
Local Zoning Code	M1-2
Legal Block	2031
Legal Lot Number	38
Jurisdiction	KINGS (BROOKLYN) NY
Township / Civil Division	BROOKLYN
Census Block Group	2
Census Block	2003
Census Tract	21100

Owner

Source: New York City records · APN 02031-0038

Assessment roll updated May 4, 2026 · Last verified May 2026

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

Owner of Record	2 Individual Names on File
Mailing Address	18 ADELPHI ST, BROOKLYN, NY 11205-1102
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Sep 29, 2010 · Amount on Record
Deed Sale	Sep 29, 2010 · Amount on Record
Prior Sale	Jul 06, 2009 · Amount on Record
Deed Document Number	2010327788
Record Updated	Jun 08, 2026

Tax Assessment & Valuation

Source: New York City records · Assessment roll updated May 4, 2026 · Last verified May 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

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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$99,960 (+48.62%) Land $10,440 Building $89,520	$1,666,000 (+48.62%) Land $174,000 Building $1,492,000
2025	$2,345.00 (+6.88%)
2023	$2,194.00 (+4.73%)	$67,260 (+21.85%) Land $10,440 Building $56,820	$1,121,000 (+21.85%) Land $174,000 Building $947,000
2022	$2,095.00	$55,200 Land $10,440 Building $44,760	$920,000 Land $174,000 Building $746,000

Flood & Wildfire

Source: FEMA National Flood Hazard Layer · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Not on file
Nearby Flood Policies	8 in force

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

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.

Historic Designation

Source: NPS National Register of Historic Places as of August 1, 2026 · Last verified October 2026

Historic District	Within 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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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
T-Mobile USA Fixed Wireless	100 / 20

May also be available: Optimum Communications, Starry, Xchange Telecom.

Based on FCC filings for 788 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	NEW YORK CITY SYSTEM serves 8,271,000 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.