Westchester County and Ossining Town property record for 4444.5 William St, Ossining, NY 10562
| Property Type | Triplex |
|---|---|
| Details | 6 bd · 3.5 ba · 4,450 sqft · built 1890 |
| Lot Size | 0.27 acres (11,761 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $22,772 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 554203 97.07-5-20 |
| Primary APN | 554203 97.07-5-20 |
|---|---|
| Alternative APN |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 4,450 sqft Total Area |
| 1st Floor Area | 1,780 sqft |
| Attic | Attic |
| Attic Area | 890 sqft |
| Basement Area | 500 sqft |
| Finished Basement | 500 sqft |
| Unfinished Basement | 500 sqft |
| Year Built | Built 1890 |
|---|---|
| Effective Year Built | Effective 1890 |
| Architectural Style | Traditional |
| Exterior Material | Aluminum/Vinyl |
| Lot Area | 11,761 sqft (0.27 acres) |
| Lot Dimensions | 243 ft deep x 50 ft wide |
| Garage Type | Detached |
| Garage Area | 720 sqft |
| Parking Spaces | 3 Parking Spaces |
| Porch | Covered Porch |
| Porch Area | 530 sqft |
| Patio Area | 350 sqft |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 4444.5 WILLIAM ST |
|---|---|
| City | OSSINING |
| State | NY |
| Zip | 10562 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Triplex |
| Legal Block | 5 |
| Legal Lot Number | 20.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | OSSINING |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 13304 |
4444.5 William St, a triplex, is owned by two individuals.
Source: Westchester County and Ossining Town records, as of October 21, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 30 ROUND TREE LN, MONTROSE, NY 10548-1428 |
| 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.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 4444.5 William St was $22,772, up 104.7% from the year before.
Source: Westchester County and Ossining Town assessment roll, as of May 14, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Westchester County |
| County Subdivision | Ossining Town |
| Municipality | Ossining Village |
| Unified School District | Ossining Union Free School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $22,772.00 (+104.71%) | ||
| 2025 | $11,124.00 | $804,800 (+17.54%) Land $227,100 Building $577,700 | $804,800 (+17.54%) Land $227,100 Building $577,700 |
| 2024 | $684,700 (+7.37%) Land $129,800 Building $554,900 | $684,700 (+7.37%) Land $129,800 Building $554,900 | |
| 2023 | $637,700 Land $129,800 Building $507,900 | $637,700 Land $129,800 Building $507,900 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4444.5 William St in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2009.
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 | 1 in force |
| Nearby Flood Claims | 2 (2009–2021) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Sep 2021 · Remnants Of Hurricane Ida |
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.
The area around 4444.5 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 | OSSINING WATER DEPARTMENT serves 30,000 people · EPA ID NY5903451 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jul 2025 |
| Lead | 3 ppb (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 616 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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