Suffolk County and Islip Town property record for 24 William Ave, Islip, NY 11751 · Last verified August 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Lot Size | 7,405 sqft (0.17 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $399,930 (2016) |
| Tax Bill | $15,065.00 (2024) |
| Primary APN | 472889 319.-3-83.12 |
|---|---|
| Alternative APNs |
|
| Lot Area | 7,405 sqft (0.17 acres) |
|---|---|
| Lot Width | 92 ft Width |
| Street Address | 24 WILLIAM AVE |
|---|---|
| City | ISLIP |
| State | NY |
| Zip | 11751-2723 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | T044H00000000 |
| Legal Block | 9000 |
| Legal Lot Number | 300 |
| Jurisdiction | SUFFOLK NY |
| Minor Civil Division | ISLIP |
| Census Blockgroup | 1 |
| Census Block | 1013 |
| Census Tract | 147401 |
Source: Suffolk County and Islip Town records · APN 472889 319.-3-83.12
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 | 24 WILLIAM AVE, ISLIP, NY 11751-2723 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Date | Document |
|---|---|
| Apr 21, 2022 | Deed of Trust, Mortgage · Stand Alone Refinance ROCKET MORTGAGE |
| May 26, 2021 | Deed of Trust, Mortgage · Federal Housing Administration (FHA) Mortgage SECRETARY HOUSING URBAN DEVELOPMENT |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Nov 14, 2016 · Amount on Record |
| Deed Sale | Nov 14, 2016 · Amount on Record |
| Deed Book / Page | 12887 / 735 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 24 WILLIAM AVE, ISLIP, NY 11751-2723 |
| Transaction Type | Mortgage |
| Record Updated | Oct 10, 2023 |
| Name | Verified Name |
|---|
| Document Number | 0234080819 |
|---|---|
| Date | Apr 21, 2022 |
| Book Page | 23408/819 |
| Name | ROCKET MORTGAGE |
|---|
| Type | Stand Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Term | 349 Months |
| Due | May 01, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 24 WILLIAM AVE, ISLIP, NY 11751-2723 |
| Transaction Type | Mortgage |
| Record Updated | Jan 17, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0232790852 |
|---|---|
| Date | May 26, 2021 |
| Book Page | 23279/852 |
| Instrument | DM013124 |
| Name | SECRETARY HOUSING URBAN DEVELOPMENT |
|---|---|
| Type | Government Agency |
| Type | Federal Housing Administration (FHA) Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 301 Months |
| Due | Jun 01, 2046 |
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 | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $46,000 (-) Land $6,500 Building $39,500 | $647,887 (-) Land $91,549 Building $556,338 | |
| 2024 | $15,065.00 | $647,887 (+2.54%) Land $91,549 Building $556,338 | |
| 2023 | $46,000 Land $6,500 Building $39,500 | $631,868 Land $89,286 Building $542,582 |
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 | 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; lenders make the official flood determination.
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