Westchester County and Mount Vernon City property record for 46 William St, Mount Vernon, NY 10552
| Property Type | Duplex |
|---|---|
| Lot Size | 0.07 acres (3,049 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $102,000 (Sep 1995) |
| Tax Bill | $14,781 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 550800 165.38-1048-26 |
| Primary APN | 550800 165.38-1048-26 |
|---|---|
| Alternative APNs |
|
| Architectural Style | Duplex Single |
|---|---|
| Lot Area | 3,049 sqft (0.07 acres) |
| Account Number | 006770 |
|---|---|
| Street Address | 46 WILLIAM ST |
| City | MOUNT VERNON |
| State | NY |
| Zip | 10552-2809 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Subdivision | MAP PROPERTY HEIRS JONAS FARRINGTON |
| Legal Block | 1048 |
| Legal Lot Number | 26.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | MOUNT VERNON |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 3800 |
46 William St, a duplex, is owned and occupied by two individuals who bought it in September 1995.
Source: Westchester County and Mount Vernon City records, as of October 21, 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 File |
|---|---|
| Mailing Address | 46 WILLIAM ST, MOUNT VERNON, NY 10552-2809 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 5, 1995 · Amount on File |
| Deed Sale | Sep 5, 1995 · Amount on File |
| Prior Sale | Sep 5, 1995 · Amount on File |
| Deed Book / Page | 11229 / 45 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 46 William St was $14,781, down 9.8% from the year before.
Source: Westchester County and Mount Vernon City assessment roll, as of May 14, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Westchester County |
| Municipality | Mount Vernon City |
| Unified School District | Mount Vernon School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $14,781.00 (-9.76%) | ||
| 2025 | $16,379.00 | $8,600 (-) Land $2,000 Building $6,600 | $477,778 (+6.67%) Land $111,111 Building $366,667 |
| 2024 | $8,600 (-) Land $2,000 Building $6,600 | $447,917 (-10.94%) Land $104,167 Building $343,750 | |
| 2023 | $8,600 Land $2,000 Building $6,600 | $502,924 Land $116,959 Building $385,965 |
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 46 William St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 18, 2026
| 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 46 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 | MOUNT VERNON WATER DEPARTMENT serves 73,893 people · EPA ID NY5903441 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Jul 2025 |
| Lead | 7 ppb (2025–2027) 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 367 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
| Spectrum Cable · Fiber in parts of the area | 1,000 / 1,000 |
May also be available: Optimum, T-Mobile.
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