Nassau County and North Hempstead Town property record for 99 William St, Williston Park, NY 11596
| Property Type | Single Family Home |
|---|---|
| Details | 3.5 ba · 2,772 sqft · built 1949 |
| Lot Size | 0.115 acres (5,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $575,000 (Dec 2017) |
| Tax Bill | $14,301 (2025) |
| Deeds & Mortgages | Sep 2021 Mortgage Sep 2021 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 09-657-00-0043 |
| Primary APN | 09-657-00-0043 |
|---|---|
| Alternative APNs |
|
| Full Baths | 3.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 2,772 sqft Living Area |
| Gross Area | 3,366 sqft |
| 1st Floor Area | 792 sqft |
| Basement Area | 594 sqft |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Architectural Style | Colonial |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Foundation Type | Concrete |
| Roof Material | Other |
| Lot Area | 5,000 sqft (0.115 acres) |
| Lot Dimensions | 100 ft deep x 50 ft wide |
| Garage Type | Detached |
| Garage Area | 480 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Frame Porch |
| Deck Area | Deck Area |
| Patio Area | 420 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 09657 00430 |
|---|---|
| Street Address | 99 WILLIAM ST |
| City | WILLISTON PARK |
| State | NY |
| Zip | 11596-1033 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | 43 |
| Legal Block | 657 |
| Legal Lot Number | 43 |
| Jurisdiction | NASSAU NY |
| Township / Civil Division | NORTH HEMPSTEAD |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 303301 |
99 William St is owned and occupied by two individuals who bought it in December 2017.
Source: Nassau County and North Hempstead Town records, as of June 17, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 99 WILLIAM ST, WILLISTON PARK, NY 11596-1033 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Sep 9, 2021 | Deed of Trust, Mortgage · Conventional Mortgage JP MORGAN CHASE BANK |
| Sep 9, 2021 | Deed of Trust, Mortgage · Conventional Mortgage JP MORGAN CHASE BANK |
| Dec 19, 2017 | Grant Deed, Transfer · Conventional Mortgage JP MORGAN CHASE BK |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 19, 2017 · Amount on File |
| Deed Sale | Dec 19, 2017 · Amount on File |
| Deed Document Number | 2017125967 |
| Prior Transfer Date | Dec 26, 2012 |
| Prior Transfer Doc | 0129060352 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | NASSAU NY |
| Property Address | 99 WILLIAM ST, WILLISTON PARK, NY 11596-1033 |
| Transaction Type | Mortgage |
| Record Updated | Oct 6, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0458210469 |
|---|---|
| Date | Sep 9, 2021 |
| Book Page | 45821/469 |
| Instrument | 2021-117750 |
| Name | JP MORGAN CHASE BANK |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Apr 1, 2051 |
| Rate Type | Fixed Rate |
|---|
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | NASSAU NY |
| Property Address | 99 WILLIAM ST, WILLISTON PARK, NY 11596-1033 |
| Transaction Type | Mortgage |
| Record Updated | Oct 6, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0458210451 |
|---|---|
| Date | Sep 9, 2021 |
| Book Page | 45821/451 |
| Instrument | 2021-117749 |
| Name | JP MORGAN CHASE BANK |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Apr 1, 2051 |
| Rate Type | Fixed Rate |
|---|
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | NASSAU NY |
| Recording Date | Dec 19, 2017 |
| Property Address | 99 WILLIAM ST, WILLISTON PARK, NY 11596-1033 |
| Document Number | 0135990710 |
| Book / Page | 013599 / 000710 |
| Instrument Date | Dec 7, 2017 |
| Instrument | 125967 |
| Transaction Type | Transfer |
| Record Updated | Jan 11, 2019 |
| Title Company | APPELLATE LAND SERVICES LIMITED, APPELLATE LAND SVCS LTD |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $2,300.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Husband and Wife |
| Address | 9719 124TH ST SOUTH RICHMOND HILL NY 114191413, SOUTH RICHMOND HILL, NY 11419-1413 |
| Document Number | 425720899 |
|---|---|
| Date | Dec 19, 2017 |
| Book Page | 042572/000899 |
| Instrument | 125968 |
| Name | JP MORGAN CHASE BK |
|---|---|
| Type | Bank |
| Address | COLUMBUS, OH 43240-2050 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Dec 18, 2047 |
The 2025 property tax bill for 99 William St was $14,301 with a homeowner's exemption.
Source: Nassau County and North Hempstead Town assessment roll, as of June 17, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Nassau County |
| County Subdivision | North Hempstead Town |
| Municipality | Williston Park Village |
| Unified School District | Herricks Union Free School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $862 (+1.89%) Land $281 Building $581 | $862,000 (+1.89%) | |
| 2025 | $14,301.00 Homeowner's exemption | $846 Land $276 Building $570 | $846,000 |
| 2023 | $12,139.00 Additional exemption filed | $833 Land $272 Building $561 | $833,000 |
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 99 William St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective April 5, 2023
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 99 William St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 | WILLISTON PARK (V) serves 7,287 people · EPA ID NY2902858 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Sep 2024 |
| Lead | 2 ppb (2023–2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| 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 888 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
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