20 William St, Bethpage, NY 11714 Property Records

Nassau County and Oyster Bay Town property record for 20 William St, Bethpage, NY 11714

Property Summary

Property Type	Single Family Home
Details	1.5 ba · 1,050 sqft · built 1963
Lot Size	0.176 acres (7,650 sqft)
Owner	2 Individual Names on File
Last Sale	$550,000 (Oct 2021)
Tax Bill	$12,673 (2025)
Deeds & Mortgages	Oct 2021 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`49-103-00-0239`

Property Details

APN / Parcel Number

Primary APN	`49-103-00-0239`
Alternative APNs	`2489-49-103-00-0239-0` `49103000239000000000` `282489 49.-103-239` `49103 02390`

Interior

Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,050 sqft Living Area
Gross Area	1,270 sqft
1st Floor Area	1,050 sqft

Exterior

Year Built	Built 1963
Effective Year Built	Effective 1963
Architectural Style	Ranch
Exterior Material	Composition/Composite
Construction Type	Frame
Roof Material	Other
Lot Area	7,650 sqft (0.176 acres)
Lot Dimensions	148 ft deep x 50 ft wide
Garage Type	Attached
Garage Area	220 sqft
Parking Spaces	1 Parking Space
Porch	Open Frame Porch
Porch Area	35 sqft
Patio Area	420 sqft

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	49103 02390
Street Address	20 WILLIAM ST
City	BETHPAGE
State	NY
Zip	11714-4407
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TOWN #3 SCH DIST 021
Legal Block	103
Legal Lot Number	239-2
Jurisdiction	NASSAU NY
Township / Civil Division	OYSTER BAY
Census Block Group	4
Census Block	4017
Census Tract	520002

Owner

Source: Nassau County and Oyster Bay Town records · APN 49-103-00-0239

Assessment roll updated June 17, 2026 · Last verified June 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	20 WILLIAM ST, BETHPAGE, NY 11714-4407
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Oct 07, 2021 · Amount on Record
Deed Sale	Oct 07, 2021 · Amount on Record
Prior Sale	Dec 18, 2007 · Amount on Record
Deed Document Number	2021-131254
Deed Book / Page	14147 / 5
Record Updated	Sep 20, 2026

October 2021: Bargain and Sale Deed, Transfer

Document Type	Bargain and Sale Deed
Jurisdiction	NASSAU NY
Recording Date	Oct 07, 2021
Property Address	20 WILLIAM ST, BETHPAGE, NY 11714-4407
Document Number	0141470005
Book / Page	14147 / 5
Map Reference	MAP 263 CASE 1969
Instrument Date	Sep 28, 2021
Instrument	2021-131254
Transaction Type	Transfer
Record Updated	Nov 10, 2021
Title Company	CHICAGO TITLE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$2,200.00
Amount Accuracy	Rounded by County
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	39 S 1ST ST, BETHPAGE, NY 11714-2614

Mortgage

Document Number	0459180561
Date	Oct 07, 2021
Book Page	45918/561
Instrument	2021-131255

Lender

Name	JOVIA FINANCIAL FCU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Oct 01, 2051

Interest

Rate Type	Fixed Rate

Tax Assessment & Valuation

Source: Nassau County and Oyster Bay Town records · Assessment roll updated June 17, 2026 · Last verified June 2026

Property Jurisdictions

Type	Name
State	New York
County	Nassau County
County Subdivision	Oyster Bay Town
Unified School District	Bethpage Union Free School District (KG - 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		$454 (-) Land $279 Building $175	$454,000 (-)
2025	$12,673.00 (+4.11%)	$454 (-) Land $279 Building $175	$454,000 (-)
2023	$12,173.00 Additional exemption filed	$454 Land $279 Building $175	$454,000

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of April 5, 2023 · 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

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

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

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
Verizon Fiber · Fixed Wireless in parts of the area	2,300 / 2,300

May also be available: T-Mobile USA.

Based on FCC filings for 714 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	BETHPAGE WD serves 33,000 people
Water Source	Groundwater
Last State Inspection	Jul 2025
Lead	Under 1 ppb (2021–2023) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
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.