Suffolk County and Islip Town property record for 37 William Ave, Islip, NY 11751 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.27 acres (11,761 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $237,000 (Dec 2017) |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 320.-1-58.1 |
| Primary APN | 472889 320.-1-58.1 |
|---|---|
| Alternative APNs |
|
| Lot Area | 11,761 sqft (0.27 acres) |
|---|---|
| Lot Width | 100 ft Width |
| Account Number | 566641 |
|---|---|
| Street Address | 37 WILLIAM AVE |
| City | ISLIP |
| State | NY |
| Zip | 11751-2721 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T044H00000000 |
| Legal Block | 0001 |
| Legal Lot Number | 100 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 147401 |
Source: Suffolk County and Islip Town records · APN 472889 320.-1-58.1
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 Individual Names on File |
|---|---|
| Mailing Address | 37 WILLIAM AVE, ISLIP, NY 11751-2721 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 28, 2017 · Amount on Record |
| Deed Sale | Dec 28, 2017 · Amount on Record |
| Deed Document Number | 201717-0230634 |
| Deed Book / Page | 12944 / 92 |
| 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, not market price estimates; both are a fraction of this property's market value.
| Year | Assessed Value | Assessed Market Value |
|---|---|---|
| 2025 | $43,400 (-) Land $9,000 Building $34,400 | |
| 2024 | $611,268 (+2.54%) Land $126,761 Building $484,507 | |
| 2023 | $43,400 Land $9,000 Building $34,400 | $596,153 Land $123,626 Building $472,527 |
Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), updated September 18, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 361031474011, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Flood Insurance Cost | Premium on Record median of 4 individual NFIP policies nearby |
| Nearby Flood Policies | 4 in force 3 of 4 on primary residences |
| Nearby Flood Claims | 25 (1979–2023) |
| Claims Outside the SFHA | 18 of 25 |
| Most Recent Claim | Jul 2023, river or lake flooding |
| Flood Events |
|
| Wildfire Risk | Low above 3% of the US · above 3% of New York |
|---|---|
| Wildfire Likelihood | Less than 1 in 10,000 per year |
| Exposure | Direct burnable vegetation at the parcel |
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.
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