Suffolk County and Islip Town property record for 831 Islip Ave, Central Islip, NY 11722
| Property Type | Duplex |
|---|---|
| Lot Size | 0.51 acres (22,216 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $13,425 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 229.-1-43.2 |
| Primary APN | 472889 229.-1-43.2 |
|---|---|
| Alternative APNs |
|
| Units | 2 Units |
|---|
| Architectural Style | Duplex Single |
|---|---|
| Lot Area | 22,216 sqft (0.51 acres) |
| Lot Dimensions | 225 ft deep x 100 ft wide |
| Account Number | 559012 |
|---|---|
| Street Address | 831 ISLIP AVE |
| City | CENTRAL ISLIP |
| State | NY |
| Zip | 11722-4815 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | AA |
| Legal Description | X2218895Y195957 T023H00000000 |
| Legal Block | 9000 |
| Legal Lot Number | 100 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 146206 |
831 Islip Ave, a duplex, is owned and occupied by two individuals who acquired it in March 2004.
Source: Suffolk County and Islip Town records, as of August 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 831 ISLIP AVE, CENTRAL ISLIP, NY 11722-4815 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Life Estate |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Mar 10, 2004 |
| Transfer Doc | 0123170343 |
| Record Updated | Sep 20, 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 | Islip Union Free School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $40,500 Land $11,300 Building $29,200 | $570,423 (-) Land $159,155 Building $411,268 | |
| 2024 | $13,425.00 | $570,423 (+2.54%) Land $159,155 Building $411,268 | |
| 2023 | $40,500 Land $11,300 Building $29,200 | $556,319 Land $155,220 Building $401,099 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 831 Islip Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 18, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 831 Islip Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 98% of the US · lower than 97.9% 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 342 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber | 2,300 / 2,300 |
May also be available: T-Mobile.
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