Suffolk County and Islip Town property record for 14 William Ave, Islip, NY 11751
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.22 acres (9,583 sqft) |
| Owner | Individual Name on File |
| Last Sale | $220,000 (Aug 2018) |
| Deeds & Mortgages | Apr 2021 Refinance Feb 2017 Loan Modification |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 319.-3-84 |
| Primary APN | 472889 319.-3-84 |
|---|---|
| Alternative APNs |
|
| Lot Area | 9,583 sqft (0.22 acres) |
|---|---|
| Lot Width | 100 ft Width |
| Account Number | 038992 |
|---|---|
| Street Address | 14 WILLIAM AVE |
| City | ISLIP |
| State | NY |
| Zip | 11751-2716 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | B |
| Legal Description | X2218570Y187422 T044H00000000 |
| Legal Block | 9000 |
| Legal Lot Number | 300 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 1 |
| Census Block | 1013 |
| Census Tract | 147401 |
Source: Suffolk County and Islip Town records · APN 472889 319.-3-84
Assessment roll updated July 8, 2026 · Last verified July 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 | 14 WILLIAM AVE, ISLIP, NY 11751-2716 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Apr 01, 2021 | Deed of Trust, Mortgage · Stand-Alone Refinance FREEDOM MORTGAGE CORP |
| Feb 01, 2017 | Loan Modification, Mortgage · Conventional with PMI NATIONSTAR MTG |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Aug 14, 2018 · Amount on Record |
| Deed Sale | Aug 14, 2018 · Amount on Record |
| Prior Sale | Apr 25, 2002 · Amount on Record |
| Deed Book / Page | 12973 / 839 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 14 WILLIAM AVE, ISLIP, NY 11751-2716 |
| Transaction Type | Mortgage |
| Record Updated | May 04, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0232530798 |
|---|---|
| Date | Apr 01, 2021 |
| Book Page | 23253/798 |
| Instrument | DM000139 |
| Name | FREEDOM MORTGAGE CORP |
|---|---|
| Type | Subprime Lender |
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 01, 2051 |
| Document Type | Loan Modification |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 14 WILLIAM AVE, ISLIP, NY 11751-2716 |
| Document Number | 0228600711 |
| Instrument Date | Feb 01, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Jun 18, 2018 |
| Name | Verified Name |
|---|---|
| Address | 14 WILLIAM AVE ISLIP NY 117512716, ISLIP, NY 11751-2716 |
| Document Number | 0228600711 |
|---|---|
| Date | Sep 29, 2017 |
| Book Page | 022860/000711 |
| Name | NATIONSTAR MTG |
|---|---|
| Type | Mortgage Company |
| Address | 8950 CYPRESS WATERS BLVD, COPPELL, TX 75019-4620 |
| Type | Conventional with PMI |
|---|---|
| Amount | Amount Recorded |
| Term | 480 Months |
| Due | Sep 28, 2057 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.5% |
Source: Suffolk County and Islip Town records · Assessment roll updated July 8, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Islip Town |
| Unified School District | Islip Union Free School District (KG - 12) |
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 | Assessed Value | Assessed Market Value |
|---|---|---|
| 2025 | $37,500 (-) Land $7,400 Building $30,100 | |
| 2024 | $528,169 (+2.54%) Land $104,225 Building $423,944 | |
| 2023 | $37,500 Land $7,400 Building $30,100 | $515,110 Land $101,648 Building $413,462 |
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
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 4 in force |
| Nearby Flood Claims | 25 (1979–2023) |
| Claims Outside the SFHA | 18 of 25 |
| Most Recent Claim | Jul 2023 · river or lake flooding |
| Claims by Event |
|
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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.
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 |
Based on FCC filings for 329 locations within half a mile of this property.
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 |
| 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.
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