Suffolk County and Islip Town property record for 39 William Ave, Central Islip, NY 11722
| Property Type | Duplex |
|---|---|
| Details | 2,059 sqft · built 1946 |
| Lot Size | 0.27 acres (11,761 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $372,000 (Apr 2020) |
| Tax Bill | $11,520 (2024) |
| Deeds & Mortgages | Apr 2022 Mortgage Apr 2020 Sale & Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 472889 79.-1-87 |
| Primary APN | 472889 79.-1-87 |
|---|---|
| Alternative APNs |
|
| Building Area | 2,059 sqft Living Area |
|---|---|
| 1st Floor Area | 959 sqft |
| Basement Area | 700 sqft |
| Year Built | Built 1946 |
|---|---|
| Effective Year Built | Effective 1946 |
| Architectural Style | Duplex Single |
| Lot Area | 11,761 sqft (0.27 acres) |
| Lot Dimensions | 100 ft deep x 120 ft wide |
| Account Number | 369280 |
|---|---|
| Street Address | 39 WILLIAM AVE |
| City | CENTRAL ISLIP |
| State | NY |
| Zip | 11722-2339 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | B |
| Legal Description | X2221973Y208671 T012H00000000 |
| Legal Subdivision | ISLIP ESTS |
| Legal Block | 9000 |
| Legal Lot Number | 100 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | ISLIP |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 145706 |
Source: Suffolk County and Islip Town records, as of October 19, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 39 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2339 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Apr 19, 2022 | Deed of Trust, Mortgage · FHA Mortgage NATIONSTAR MORTGAGE LLC |
| Apr 29, 2020 | Grant Deed, Transfer · Conventional Mortgage LOANDEPOT.COM LLC |
| Dec 4, 2019 | Grant Deed, Transfer FUNDING NY LLC FUNDING NY LLC |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 2, 2020 · Amount on Record |
| Deed Sale | Apr 2, 2020 · Amount on Record |
| Prior Sale | Dec 4, 2019 · Amount on Record |
| Deed Book / Page | 13054 / 532 |
| Prior Transfer Date | Aug 13, 2009 |
| Prior Transfer Doc | 0126270392 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 39 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2339 |
| Transaction Type | Mortgage |
| Record Updated | Jul 26, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0234070006 |
|---|---|
| Date | Apr 19, 2022 |
| Book Page | 23407/6 |
| Instrument | DN003931 |
| Name | NATIONSTAR MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | FHA Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 349 Months |
| Due | May 1, 2051 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Apr 29, 2020 |
| Property Address | 39 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2339 |
| Document Number | 0130540532 |
| Book / Page | 013054 / 000532 |
| Instrument Date | Feb 25, 2020 |
| Transaction Type | Transfer |
| Record Updated | Jul 14, 2020 |
| Title Company | NOT AVAILABLE |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $1,488.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 7 CHURCH ST CENTRAL ISLIP NY 117222301, CENTRAL ISLIP, NY 11722-2301 |
| Document Number | 231300807 |
|---|---|
| Date | Apr 29, 2020 |
| Book Page | 023130/000807 |
| Name | LOANDEPOT.COM LLC |
|---|---|
| Type | Funding / Finance Company |
| Address | FOOTHILL RANCH, CA 92610 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Apr 28, 2050 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Dec 4, 2019 |
| Property Address | 39 WILLIAM AVE, CENTRAL ISLIP, NY 11722-2339 |
| Document Number | 0130380533 |
| Book / Page | 013038 / 000533 |
| Instrument Date | Oct 14, 2019 |
| Transaction Type | Transfer |
| Record Updated | May 20, 2021 |
| Title Company | NOT AVAILABLE |
| Amount | Amount Recorded |
|---|---|
| Tax | $602.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 68 S SERVICE RD #100 MELVILLE NY 117472350, 100, MELVILLE, NY 11747-2350 |
| Document Number | 230840614 |
|---|---|
| Date | Dec 4, 2019 |
| Book Page | 023084/000614 |
| Name | FUNDING NY LLC FUNDING NY LLC |
|---|---|
| Type | Bank |
| Address | GREAT NECK, NY 11021 |
| Amount | Amount Recorded |
|---|
| Document Number | 230840615, |
|---|---|
| Date | Dec 4, 2019 |
| Book Page | 023084/000615 |
| Type | Bank |
|---|---|
| Address | GLEN HEAD, NY 11545 |
| Type | Construction Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 12 Months |
| Due | Dec 3, 2020 |
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 | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $35,500 (-) Land $7,500 Building $28,000 | $500,000 (-) Land $105,634 Building $394,366 | |
| 2024 | $11,520.00 | $500,000 (+2.54%) Land $105,634 Building $394,366 | |
| 2023 | $35,500 Land $7,500 Building $28,000 | $487,637 Land $103,022 Building $384,615 |
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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