Suffolk County and Islip Town property record for 17 21st Ave, Bay Shore, NY 11706
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.27 acres (11,761 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $615,000 (Sep 2025) |
| Deeds & Mortgages | Sep 2025 Sale & Refinance |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 246.-2-79 |
| Primary APN | 472889 246.-2-79 |
|---|---|
| Alternative APNs |
|
| Lot Area | 11,761 sqft (0.27 acres) |
|---|---|
| Lot Dimensions | 158 ft deep x 75 ft wide |
| Account Number | 228910 |
|---|---|
| Street Address | 17 21ST AVE |
| City | BAY SHORE |
| State | NY |
| Zip | 11706-3112 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | B |
| Legal Description | X2208194Y193158 T018H00000000 |
| Legal Block | 6000 |
| Legal Lot Number | 200 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 1 |
| Census Block | 1010 |
| Census Tract | 146002 |
17 21st Ave is owned by two individuals who bought it in September 2025.
Source: Suffolk County and Islip Town records, as of August 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 210 29TH ST, COPIAGUE, NY 11726-2600 |
| Owner Type | Individual |
| Vesting | Tenants in Common |
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 Sale | Sep 8, 2025 · Amount on File |
| Deed Sale | Sep 8, 2025 · Amount on File |
| Deed Book / Page | 13308 / 157 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Sep 8, 2025 |
| Property Address | 17 21ST AVE, BAY SHORE, NY 11706-3112 |
| Document Number | 0133080157 |
| Book / Page | 13308 / 157 |
| Instrument Date | Aug 21, 2025 |
| Transaction Type | Transfer |
| Record Updated | Jun 9, 2026 |
| Title Company | OLD REPUBLIC TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Tenants in Common |
| Address | 210 29TH ST, COPIAGUE, NY 11726-2600 |
| Document Number | 0236800973 |
|---|---|
| Date | Sep 8, 2025 |
| Book Page | 23680/973 |
| Name | US MORTGAGE CORP |
|---|---|
| Type | Mortgage Company |
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Oct 1, 2055 |
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 | Brentwood Union Free School District (PK - 12) |
| Year | Assessed Value | Assessed Market Value |
|---|---|---|
| 2025 | $28,300 (-) Land $7,000 Building $21,300 | |
| 2024 | $28,300 (-) Land $7,000 Building $21,300 | $398,592 (+2.54%) Land $98,592 Building $300,000 |
| 2023 | $28,300 Land $7,000 Building $21,300 | $388,736 Land $96,154 Building $292,582 |
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.
FEMA maps place 17 21st Ave in Zone X, an area of minimal flood risk, though there have been 8 flood claims nearby since 1991.
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 | 5 in force |
| Nearby Flood Claims | 8 (1991–2012) |
| Most Recent Claim | Oct 2012 · Hurricane Sandy |
| Claims by Event |
|
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.
Wildfire risk around 17 21st 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 99.8% of the US · lower than 99.9% 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 415 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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