Westchester County and Mount Vernon City property record for 431 S 4th Ave, Mount Vernon, NY 10550
| Property Type | Duplex |
|---|---|
| Lot Size | 0.12 acres (5,227 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $17,531 (2026) |
| Deeds & Mortgages | Feb 2021 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 550800 169.39-3107-26 |
| Primary APN | 550800 169.39-3107-26 |
|---|---|
| Alternative APNs |
|
| Architectural Style | Duplex Single |
|---|---|
| Lot Area | 5,227 sqft (0.12 acres) |
| Account Number | 082520 |
|---|---|
| Street Address | 431 S 4TH AVE |
| City | MOUNT VERNON |
| State | NY |
| Zip | 10550-4401 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Subdivision | MAP VILLAGE MOUNT VERNON |
| Legal Block | 3107 |
| Legal Lot Number | 26.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | MOUNT VERNON |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 2700 |
431 S 4th Ave, a duplex, is owned and occupied by two individuals who acquired it in December 2020.
Source: Westchester County and Mount Vernon City records, as of October 21, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 431 S 4TH AVE, MOUNT VERNON, NY 10550-4401 |
| 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.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Dec 2, 2020 |
| Transfer Doc | 0000003334 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | WESTCHESTER NY |
| Recording Date | Feb 12, 2021 |
| Property Address | 431 S 4TH AVE, MOUNT VERNON, NY 10550-4401 |
| Document Number | 0602793334 |
| Map Reference | MAP 144 |
| Instrument Date | Dec 2, 2020 |
| Instrument | 602793334 |
| Transaction Type | Transfer |
| Record Updated | May 6, 2022 |
| Title Company | GREAT AMERICAN TITLE AGENCY, GREAT AMERICAN TTL AGCY INC |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 431 S 4TH AVE, MOUNT VERNON, NY 10550-4401 |
The 2026 property tax bill for 431 S 4th Ave was $17,531, down 0.4% 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 | $17,531.00 (-0.44%) | ||
| 2025 | $17,608.00 | $10,200 (-) Land $2,600 Building $7,600 | $566,666 (+6.67%) Land $144,444 Building $422,222 |
| 2024 | $10,200 (-) Land $2,600 Building $7,600 | $531,250 (-10.94%) Land $135,417 Building $395,833 | |
| 2023 | $10,200 Land $2,600 Building $7,600 | $596,491 Land $152,047 Building $444,444 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 431 S 4th 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 431 S 4th 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 966 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: Optimum, T-Mobile.
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