16 William Ave, East Islip, NY 11730 Property Records

Suffolk County and Islip Town property record for 16 William Ave, East Islip, NY 11730

Property Summary

Property Type	Single Family Home
Lot Size	0.25 acres (10,890 sqft)
Owner	2 Individual Names on Record
Last Sale	$510,000 (Aug 2012)
Tax Bill	$11,950 (2024)
Flood Zone	Zone X (minimal risk)
APN	`472889 372.-4-14.2`

Property Details

APN / Parcel Number

Primary APN	`472889 372.-4-14.2`
Alternative APNs	`0500-372.00-04.00-014.002` `472800771750`

Exterior

Lot Area	10,890 sqft (0.25 acres)
Lot Dimensions	151 ft deep x 72 ft wide

Location & Zoning

Street Address	16 WILLIAM AVE
City	EAST ISLIP
State	NY
Zip	11730-2305
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	A
Legal Description	T061H00000000
Legal Block	2000
Legal Lot Number	400
Jurisdiction	SUFFOLK NY
Township / Civil Division	ISLIP
Census Block Group	1
Census Block	1001
Census Tract	147504

Owner

Source: Suffolk County and Islip Town records, as of August 11, 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 Record
Mailing Address	16 WILLIAM AVE, EAST ISLIP, NY 11730-2305
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 20, 2012 · Amount on Record
Deed Sale	Aug 20, 2012 · Amount on Record
Prior Sale	Apr 24, 2003 · Amount on Record
Deed Book / Page	12702 / 601
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Suffolk County and Islip Town assessment roll, as of August 11, 2026

Property Jurisdictions

Type	Name
State	New York
County	Suffolk County
County Subdivision	Islip Town
Unified School District	East Islip Union Free School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$45,800 (-) Land $10,800 Building $35,000	$645,071 (-) Land $152,113 Building $492,958
2024	$11,950.00		$645,071 (+2.54%) Land $152,113 Building $492,958
2023		$45,800 Land $10,800 Building $35,000	$629,121 Land $148,352 Building $480,769

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, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 14 policies
Nearby Flood Policies	14 in force
Nearby Flood Claims	1 (2005)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Oct 2005 · rainfall accumulation

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	SUFFOLK COUNTY WATER AUTHORITY serves 1,100,000 people · EPA ID NY5110526
Water Source	Groundwater
Last State Inspection	Jan 2024
Lead	1 ppb (2025–2027) action level 15 ppb

Violations Reported to EPA

Water Quality	Asbestos resolved · Jul 2020
Treatment and Procedure	None last 10 years
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 274 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Optimum Fiber · Cable	8,000 / 8,000
Verizon Fiber	2,300 / 2,300
T-Mobile Fixed Wireless	100 / 20