19 William St, Copiague, NY 11726 Property Records

Suffolk County and Southampton Town property record for 19 William St, Copiague, NY 11726 · Last verified August 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	2 Beds
Bathrooms	1 Baths
Architecture Style	Mobile Home
Year Built	Built 1991
Square Footage	2,054 sqft Living Area
Lot Size	4,792 sqft (0.11 acres)
Last Sale	$201,000 (2024)
Tax Bill	$2,385.00 (2024)

Property Details

APN / Parcel Number

Primary APN	`0903-006.00-04.00-085.001`
Alternative APNs	`473609 006.000-0004-085.001` `360900600000040850010000` `473600100300`

Interior

Bedrooms	2 Beds
Full Baths	1 Baths
Building Area	2,054 sqft Living Area
1st Floor	2,054 sqft 1st Floor
Stories	1 Stories

Exterior

Year Built	Built 1989
Effective Year Built	Effective 1991
Architectural Style	Mobile Home Style
Exterior Material	Aluminum/Vinyl Exterior
Lot Area	4,792 sqft (0.11 acres)
Porch	1 Porch
Porch Area	203 sqft Porch
View	Inferior View

Utilities and HVAC

Heating System	Hot Water Heating
Heating Fuel	Oil Heating Fuel
Sewage	Sewage Connected
Water Source	Yes (Unknown Type) Water Source

Location & Zoning

Street Address	19 WILLIAM ST
City	COPIAGUE
State	NY
Zip	11726
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	1987 EQ + 2250
Legal Block	4
Legal Lot Number	85
Jurisdiction	SUFFOLK NY
Minor Civil Division	SOUTHAMPTON
Census Blockgroup	2
Census Block	2019
Census Tract	190708

Owner

Source: Suffolk County and Southampton Town records · APN 0903-006.00-04.00-085.001

Assessment roll updated August 11, 2026 · Last verified August 2026

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

Owner of Record	Individual Name on File
Mailing Address	860 MONTAUK HWY, WATER MILL, NY 11976-2638
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Oct 28, 2024 · Amount on Record
Deed Sale	Oct 28, 2024 · Amount on Record
Prior Sale	Oct 21, 2024 · Amount on Record
Deed Book / Page	13270 / 33
Record Refreshed	Sep 20, 2026

August 2021: Deed, Transfer

Document Type	Deed
Jurisdiction	SUFFOLK NY
Recording Date	Aug 18, 2021
Property Address	19 WILLIAM ST, SAG HARBOR, NY 11963
Document Number	0131160435
Book / Page	13116 / 435
Instrument Date	Jun 17, 2021
Transaction Type	Transfer
Record Updated	May 06, 2022

Transaction

Tax	$0.00
Amount Accuracy	Zero or No Consideration Stated
Additional	Arms Length Transaction

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	119 UNDER MOUNTAIN RD, FALLS VILLAGE, CT 06031-1227

Tax Assessment & Valuation

Source: Suffolk County and Southampton Town records · Assessment roll updated August 11, 2026 · Last verified August 2026

Property Jurisdictions

Type	Name
State	New York
County	Suffolk County
County Subdivision	Southampton Town
Municipality	Sag Harbor Village
Unified School District	Sag Harbor Union Free School District (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$858,500 (-0.31%) Land $756,800 Building $101,700	$1,362,699 (-) Land $1,201,270 Building $161,429
2024	$2,385.00 (-45.86%)		$1,362,699 (+9.97%) Land $1,201,270 Building $161,429
2023		$861,200 Land $756,800 Building $104,400	$1,239,137 Land $1,088,921 Building $150,216
2020	$4,405.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), updated September 18, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Flood Hazard	Minimal
500-Year Floodplain	No
Special Flood Hazard Area	No

Wildfire

Wildfire Risk	Low above 20% of the US · above 55% of New York
Wildfire Likelihood	About 1 in 10,000 per year
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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

Historic Designation

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

Historic District	Within the Sag Harbor Village District listed 1973 · 25 contributing resources · NRIS 73001274

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