Suffolk County and Islip Town property record for 421 Islip Ave, Islip, NY 11751 · Last verified August 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Year Built | Built 2002 |
| Square Footage | 2,561 sqft Living Area |
| Lot Size | 7,405 sqft (0.17 acres) |
| Garage | Attached, 240 sqft |
| Occupancy | Owner Occupied |
| Last Sale | $302,364 (2017) |
Source: Suffolk County and Islip Town records · APN 472889 295.-1-129.2
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 421 ISLIP AVE, ISLIP, NY 11751-1825 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Nov 13, 2017 · Amount on Record |
| Deed Sale | Nov 13, 2017 · Amount on Record |
| Prior Sale | Oct 29, 2015 |
| Deed Doc Number | 201770199811 |
| Deed Book / Page | 12937 / 397 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Nov 13, 2017 |
| Property Address | 421 ISLIP AVE, ISLIP, NY 11751-1825 |
| Document Number | 0129370397 |
| Book / Page | 12937 / 397 |
| Instrument Date | Aug 25, 2017 |
| Instrument | 0017-0199811 |
| Transaction Type | Transfer |
| Record Updated | Jun 22, 2021 |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 3, BAY SHORE, NY 11706 |
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 | $43,900 (-5.18%) Land $6,700 Building $37,200 | |
| 2024 | $618,310 (-2.78%) Land $94,366 Building $523,944 | |
| 2023 | $46,300 Land $6,700 Building $39,600 | $635,989 Land $92,033 Building $543,956 |
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 | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
| Primary APN | 472889 295.-1-129.2 |
|---|---|
| Alternative APNs |
|
| Building Area | 2,561 sqft Living Area |
|---|---|
| 1st Floor | 748 sqft 1st Floor |
| Basement Area | 748 sqft Basement |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Lot Area | 7,405 sqft (0.17 acres) |
| Depth X Width | 100 ft x 75 ft Depth x Width |
| Garage Type | Attached Garage |
| Garage Area | 240 sqft Garage |
| Street Address | 421 ISLIP AVE |
|---|---|
| City | ISLIP |
| State | NY |
| Zip | 11751-1825 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | T045H00000000 |
| Legal Subdivision | MAP ISLIP MANOR |
| Legal Block | 5000 |
| Legal Lot Number | 100 |
| Jurisdiction | SUFFOLK NY |
| Minor Civil Division | ISLIP |
| Census Blockgroup | 2 |
| Census Block | 2021 |
| Census Tract | 146206 |
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