Suffolk County and Islip Town property record for 55 William Ave, Central Islip, NY 11722
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.23 acres (10,019 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $95,000 (Dec 1998) |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 79.-1-89.2 |
| Primary APN | 472889 79.-1-89.2 |
|---|---|
| Alternative APNs |
|
| Lot Area | 10,019 sqft (0.23 acres) |
|---|---|
| Lot Dimensions | 100 ft deep x 100 ft wide |
| Account Number | 369343 |
|---|---|
| Street Address | 55 WILLIAM AVE |
| City | CENTRAL ISLIP |
| State | NY |
| Zip | 11722-2339 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | B |
| Legal Description | T012H00000000 |
| Legal Block | 9000 |
| Legal Lot Number | 100 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 145706 |
Source: Suffolk County and Islip Town records, as of August 11, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 55 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2339 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 4, 1998 · Amount on File |
| Deed Sale | Dec 4, 1998 · Amount on File |
| Deed Book / Page | 11932 / 406 |
| Last Transfer Date | Nov 29, 2009 |
| Transfer Doc | 0126070772 |
| Record Updated | Oct 29, 2026 |
Source: Suffolk County and Islip Town assessment roll, as of August 11, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Islip Town |
| Unified School District | Central Islip Union Free School District (PK - 12) |
| Year | Assessed Value | Assessed Market Value |
|---|---|---|
| 2025 | $32,800 (-) Land $6,600 Building $26,200 | |
| 2024 | $461,972 (+2.54%) Land $92,958 Building $369,014 | |
| 2023 | $32,800 Land $6,600 Building $26,200 | $450,549 Land $90,659 Building $359,890 |
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.
Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 2 in force |
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: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 97% of the US · lower than 96% of New York |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | SUFFOLK COUNTY WATER AUTHORITY serves 1,100,000 people · EPA ID NY5110526 |
|---|---|
| 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, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 512 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
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