4 Williams Ave, Syosset, NY 11791 Property Records

Nassau County and Oyster Bay Town property record for 4 Williams Ave, Syosset, NY 11791

Property Summary

Property Type	Single Family Home
Details	3.5 ba · 2,373 sqft · built 1955
Lot Size	0.157 acres (6,825 sqft)
Owner	2 Individual Names on File
Last Sale	$1,150,000 (Dec 2021)
Tax Bill	$21,916 (2025)
Deeds & Mortgages	Dec 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`15-080-00-0022`

Property Details

APN / Parcel Number

Primary APN	`15-080-00-0022`
Alternative APNs	`2489-15-080-00-0022-0` `15080000022000000000` `282489 15.-80-22` `15080 00220`

Interior

Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,373 sqft Living Area
1st Floor Area	1,053 sqft
Game Room	Game Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1955
Effective Year Built	Effective 1955
Architectural Style	Colonial
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Foundation Type	Concrete
Roof Material	Other
Lot Area	6,825 sqft (0.157 acres)
Lot Dimensions	105 ft deep x 65 ft wide

Exterior Amenities

Porch	Open Frame Porch
Porch Area	240 sqft
Patio Area	32 sqft
Balcony Area	39 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Heating Fuel	Oil
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Account Number	15080 00220
Street Address	4 WILLIAMS AVE
City	SYOSSET
State	NY
Zip	11791-5004
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TOWN #3 SCH DIST 014
Legal Block	80
Legal Lot Number	22
Jurisdiction	NASSAU NY
Township / Civil Division	OYSTER BAY
Census Block Group	4
Census Block	4003
Census Tract	518700

Owner

4 Williams Ave is owned and occupied by two individuals who bought it in December 2021.

Source: Nassau County and Oyster Bay Town records, as of June 17, 2026

Owner of Record	2 Individual Names on File
Mailing Address	4 WILLIAMS AVE, SYOSSET, NY 11791-5004
Occupancy	Owner Occupied
Owner Type	Individual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Dec 7, 2021 · Amount on File
Deed Sale	Dec 7, 2021 · Amount on File
Deed Document Number	2021-155461
Deed Book / Page	14172 / 440
Record Updated	Oct 29, 2026

December 2021: Bargain and Sale Deed, Transfer

Document Type	Bargain and Sale Deed
Jurisdiction	NASSAU NY
Recording Date	Dec 7, 2021
Property Address	4 WILLIAMS AVE, SYOSSET, NY 11791-5004
Document Number	0141720440
Book / Page	14172 / 440
Map Reference	FILE 6250
Instrument Date	Nov 15, 2021
Instrument	2021-155461
Transaction Type	Transfer
Record Updated	Dec 29, 2021
Title Company	FIDELITY NATIONAL TITLE

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$16,100.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	85 MELANIE LN, 85, SYOSSET, NY 11791-5119

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	10 REGENT ST APT 603, 603, JERSEY CITY, NJ 07302-7326

Mortgage

Document Number	202115546246101432
Date	Dec 7, 2021
Instrument	2021-15546246101432

Lender

Name	TD BANK NA

Agreement

Type	Conventional Mortgage
Amount	Amount on Record

Tax Assessment & Valuation

The 2025 property tax bill for 4 Williams Ave was $21,916 with a homeowner's exemption.

Source: Nassau County and Oyster Bay Town assessment roll, as of June 17, 2026

Property Jurisdictions

Type	Name
State	New York
County	Nassau County
County Subdivision	Oyster Bay Town
Unified School District	Syosset Central School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$781 Land $326 Building $455	$781,000
2025	$21,916.00
2023	$20,788.00 Additional exemption filed	$729 Land $348 Building $381	$729,000

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

FEMA maps place 4 Williams Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2012.

Source: FEMA National Flood Hazard Layer, effective April 5, 2023 · 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
Nearby Flood Policies	2 in force
Nearby Flood Claims	2 (2012–2014)
Claims Outside the SFHA	2 of 2
Most Recent Claim	Mar 2014

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

The area around 4 Williams Ave has no burnable land within ember reach, so its wildfire risk is not rated.

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	JERICHO WD public/private · serves 58,000 people · EPA ID NY2902831
Water Source	Groundwater
Last State Inspection	Oct 2023
Lead	2 ppb (2026) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	Corrosion control Jul 2023
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 746 locations within half a mile, as of December 31, 2025

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