Suffolk County and Islip Town property record for 10 William Ave, Islip, NY 11751 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.21 acres (9,148 sqft) |
| Owner | 2 Individual Names on File |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 344.-3-7 |
| Primary APN | 472889 344.-3-7 |
|---|---|
| Alternative APNs |
|
| Lot Area | 9,148 sqft (0.21 acres) |
|---|---|
| Lot Width | 88.9 ft Width |
| Account Number | 033979 |
|---|---|
| Street Address | 10 WILLIAM AVE |
| City | ISLIP |
| State | NY |
| Zip | 11751-2716 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | X2218582Y187324 T044H00000000 |
| Legal Block | 4000 |
| 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 344.-3-7
Assessment roll updated August 11, 2026 · Last verified August 2026
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| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 10 WILLIAM AVE, ISLIP, NY 11751-2716 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Transfer Date | Jun 22, 2001 |
| Transfer Doc | 1212000892 |
| Record Updated | Sep 20, 2026 |
Source: Suffolk County and Islip Town records · Assessment roll updated August 11, 2026 · Last verified August 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 and are not market price estimates.
| Year | Assessed Value | Assessed Market Value |
|---|---|---|
| 2025 | $39,400 (-) Land $8,800 Building $30,600 | |
| 2024 | $554,930 (+2.54%) Land $123,944 Building $430,986 | |
| 2023 | $39,400 Land $8,800 Building $30,600 | $541,209 Land $120,879 Building $420,330 |
Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), updated September 18, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
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