Suffolk County and Islip Town property record for 249 Union Ave, Islip, NY 11751 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.12 acres (5,227 sqft) |
| Owner | Individual Name on File |
| Last Sale | $489,250 (Dec 2007) |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 422.-3-19.2 |
| Primary APN | 472889 422.-3-19.2 |
|---|---|
| Alternative APNs |
|
| Lot Area | 5,227 sqft (0.12 acres) |
|---|---|
| Lot Dimensions | 75 ft deep x 75 ft wide |
| Account Number | 034777 |
|---|---|
| Street Address | 249 UNION AVE |
| City | ISLIP |
| State | NY |
| Zip | 11751-4710 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T059H00000000 |
| Legal Block | 2000 |
| Legal Lot Number | 300 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 2 |
| Census Block | 2001 |
| Census Tract | 147402 |
Source: Suffolk County and Islip Town records · APN 472889 422.-3-19.2
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 | Individual Name on File |
|---|---|
| Mailing Address | 249 UNION AVE, ISLIP, NY 11751-4710 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Dec 26, 2007 · Amount on Record |
| Deed Sale | Dec 26, 2007 · Amount on Record |
| Prior Sale | Aug 15, 1996 · Amount on Record |
| Deed Book / Page | 12534 / 989 |
| 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 | $40,000 (-) Land $9,000 Building $31,000 | |
| 2024 | $563,381 (+2.54%) Land $126,761 Building $436,620 | |
| 2023 | $40,000 Land $9,000 Building $31,000 | $549,450 Land $123,626 Building $425,824 |
Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), updated September 18, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 361031474022, 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 127 individual NFIP policies nearby |
| Nearby Flood Policies | 127 in force |
| Nearby Flood Claims | 187 (1978–2023) |
| Claims Outside the SFHA | 79 of 187 |
| Most Recent Claim | Jul 2023, rainfall accumulation |
| Claims By Storm |
|
| Wildfire Risk | Low above 7% of the US · above 11% of New York |
|---|---|
| Wildfire Likelihood | About 1 in 5,556 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.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 357 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Optimum Communications | Fiber | 8,000 / 8,000 |
| Verizon | Fiber | 2,300 / 2,300 |
| Optimum Communications | Cable | 940 / 35 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
| Starlink | Satellite (low-earth orbit) | 280 / 30 |
Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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