Westchester County and Mount Vernon City property record for 433 Union Ave, Mount Vernon, NY 10550
| Property Type | Duplex |
|---|---|
| Lot Size | 0.11 acres (4,792 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $8,679 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 550800 169.31-3144-22 |
| Primary APN | 550800 169.31-3144-22 |
|---|---|
| Alternative APNs |
|
| Architectural Style | Duplex Single |
|---|---|
| Lot Area | 4,792 sqft (0.11 acres) |
| Account Number | 090900 |
|---|---|
| Street Address | 433 UNION AVE |
| City | MOUNT VERNON |
| State | NY |
| Zip | 10550-4513 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Subdivision | VILLAGE OF MOUNT VERNON |
| Legal Block | 3144 |
| Legal Lot Number | 22.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | MOUNT VERNON |
| Census Block Group | 1 |
| Census Block | 1007 |
| Census Tract | 2700 |
433 Union Ave, a duplex, is owned by two individuals who acquired it in December 2008.
Source: Westchester County and Mount Vernon City records, as of October 21, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 334 UNION AVE, MOUNT VERNON, NY 10550-4544 |
| 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 |
|---|---|
| Last Transfer Date | Dec 5, 2008 |
| Transfer Doc | 0490440100 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 433 Union Ave was $8,679, down 39.1% 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 | $8,679.00 (-39.09%) | ||
| 2025 | $14,250.00 | $5,050 (-) Land $1,700 Building $3,350 | $280,555 (+6.67%) Land $94,444 Building $186,111 |
| 2024 | $5,050 (-) Land $1,700 Building $3,350 | $263,021 (-10.94%) Land $88,542 Building $174,479 | |
| 2023 | $5,050 Land $1,700 Building $3,350 | $295,321 Land $99,415 Building $195,906 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 433 Union Ave 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 433 Union Ave 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 839 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 | 1,000 / 1,000 |
May also be available: T-Mobile.
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