Suffolk County and Islip Town property record for 27 William Ave, Central Islip, NY 11722
| Property Type | Single Family Home |
|---|---|
| Lot Size | 0.18 acres (7,841 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $500,000 (Oct 2023) |
| Deeds & Mortgages | Nov 2025 Mortgage Oct 2023 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 78.-4-66 |
| Primary APN | 472889 78.-4-66 |
|---|---|
| Alternative APNs |
|
| Lot Area | 7,841 sqft (0.18 acres) |
|---|---|
| Lot Dimensions | 100 ft deep x 80 ft wide |
| Account Number | 369160 |
|---|---|
| Street Address | 27 WILLIAM AVE |
| City | CENTRAL ISLIP |
| State | NY |
| Zip | 11722-2338 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | B |
| Legal Description | X2221398Y208493 T012H00000000 |
| Legal Subdivision | ISLIP ESTATES |
| Legal Block | 8000 |
| Legal Lot Number | 400 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 2 |
| Census Block | 2016 |
| Census Tract | 145706 |
Source: Suffolk County and Islip Town records, as of August 11, 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 Record |
|---|---|
| Mailing Address | 27 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2338 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Individual(s) |
| Date | Document |
|---|---|
| Nov 19, 2025 | Deed of Trust, Mortgage NATIONWIDE MORTGAGE BANKERS |
| Oct 31, 2023 | Deed, Transfer · FHA Mortgage THE FEDERAL SAVINGS BANK |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 31, 2023 · Amount on Record |
| Deed Sale | Oct 31, 2023 · Amount on Record |
| Prior Sale | Nov 17, 2014 · Amount on Record |
| Deed Book / Page | 13223 / 776 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 27 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2338 |
| Transaction Type | Mortgage |
| Record Updated | Jan 28, 2026 |
| Name | Verified Name |
|---|
| Document Number | 0236960299 |
|---|---|
| Date | Nov 19, 2025 |
| Book Page | 23696/299 |
| Name | NATIONWIDE MORTGAGE BANKERS |
|---|
| Amount | Amount Recorded |
|---|---|
| Term | 361 Months |
| Due | Dec 1, 2055 |
| Document Type | Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Oct 31, 2023 |
| Property Address | 27 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2338 |
| Document Number | 0132230776 |
| Book / Page | 13223 / 776 |
| Instrument Date | Sep 29, 2023 |
| Transaction Type | Transfer |
| Record Updated | Mar 19, 2024 |
| Title Company | MISC COMPANY |
| Amount | Amount Recorded |
|---|---|
| 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 |
|---|---|
| Address | 27 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2338 |
| Document Number | 0023544810 |
|---|---|
| Date | Oct 31, 2023 |
| Instrument | 23544/810 |
| Name | THE FEDERAL SAVINGS BANK |
|---|
| Type | FHA Mortgage |
|---|---|
| Amount | Amount Recorded |
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 | $28,500 (+5.56%) Land $6,200 Building $22,300 | |
| 2024 | $401,409 (+8.23%) Land $87,324 Building $314,085 | |
| 2023 | $27,000 (-) Land $6,200 Building $20,800 | $370,879 (+13.74%) Land $85,165 Building $285,714 |
| 2022 | $27,000 Land $6,200 Building $20,800 | $326,087 Land $74,879 Building $251,208 |
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 99.1% of the US · lower than 99.2% 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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