31 Harbor Ave, Islip, NY 11751 Property Records

Suffolk County and East Hampton Town property record for 31 Harbor Ave, Islip, NY 11751

Property Summary

Property Type	Single Family Home
Lot Size	0.23 acres (10,019 sqft)
Owner	2 Company Names on File
Last Sale	$1,600,000 (Jul 2025)
Tax Bill	$5,102 (2024)
Deeds & Mortgages	Jul 2025 Sale
Flood Zone	Zone X (minimal risk)
APN	`472403 6.-7-4`

Property Details

APN / Parcel Number

Primary APN	`472403 6.-7-4`
Alternative APNs	`0302-006.00-07.00-004.000` `240300600000070040000000` `47240027960`

Exterior

Lot Area	10,019 sqft (0.23 acres)

Location & Zoning

Street Address	31 HARBOR AVE
City	ISLIP
State	NY
Zip	11751
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	BLK LOT 43
Legal Block	7
Legal Lot Number	4
Jurisdiction	SUFFOLK NY
Township / Civil Division	EAST HAMPTON
Census Block Group	1
Census Block	1005
Census Tract	200903

Owner

Source: Suffolk County and East Hampton Town records · APN 472403 6.-7-4

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	2 Company Names on File
Mailing Address	726 BRICK KILN RD, 5, SAG HARBOR, NY 11963-2961
Owner Type	Company
Vesting	Trust, Revocable Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jul 30, 2025 · Amount on Record
Deed Sale	Jul 30, 2025 · Amount on Record
Prior Sale	Jan 07, 2004 · Amount on Record
Deed Book / Page	13303 / 329
Prior Transfer Date	Jan 16, 1997
Prior Transfer Doc	1182000024
Record Updated	Sep 20, 2026

July 2025: Deed, Transfer

Document Type	Deed
Jurisdiction	SUFFOLK NY
Recording Date	Jul 30, 2025
Property Address	31 HARBOR AVE, SAG HARBOR, NY 11963-3208
Document Number	0133030329
Book / Page	13303 / 329
Instrument Date	Jul 07, 2025
Transaction Type	Transfer
Record Updated	Apr 21, 2026

Transaction

Amount	Amount Recorded
Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	726 BRICK KILN RD UNIT 5, 5, SAG HARBOR, NY 11963-2961

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$4,640 (-) Land $200 Building $4,440
2024	$5,102.00
2023		$4,640 Land $200 Building $4,440	$5,412 Land $233 Building $5,179

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 18, 2026 · 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	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 70 policies
Community Rating System	Class 10 (0% premium discount)
Nearby Flood Policies	70 in force
Nearby Flood Claims	3 (2012–2024)
Claims Outside the SFHA	2 of 3
Most Recent Claim	Jan 2024 · rainfall accumulation

Wildfire

Wildfire Risk	Low lower than 80% of the US · above 54% of New York
Wildfire Likelihood	0.01% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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 Sag Harbor Hills, Azurest, and Ninevah Beach Subdivisions Historic District listed 2019 · 201 contributing resources · NRIS 100004217

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)
Optimum Communications Fiber · Cable	8,000 / 8,000

May also be available: T-Mobile USA.

Based on FCC filings for 163 locations within half a mile of this property.

Cell Coverage

5G (outdoors only) and 4G LTE

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	SUFFOLK COUNTY WATER AUTHORITY serves 1,100,000 people
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 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.