Westchester County and Mount Vernon City property record for 511 S 1st Ave, Mount Vernon, NY 10550
| Property Type | Duplex |
|---|---|
| Lot Size | 0.06 acres (2,614 sqft) |
| Owner | Company Name on File |
| Tax Bill | $11,172 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 550800 169.39-3129-6 |
| Primary APN | 550800 169.39-3129-6 |
|---|---|
| Alternative APNs |
|
| Architectural Style | Duplex Single |
|---|---|
| Lot Area | 2,614 sqft (0.06 acres) |
| Account Number | 089450 |
|---|---|
| Street Address | 511 S 1ST AVE |
| City | MOUNT VERNON |
| State | NY |
| Zip | 10550-4537 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Block | 3129 |
| Legal Lot Number | 6.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | MOUNT VERNON |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 2600 |
511 S 1st Ave, a duplex, is owned by a company.
Source: Westchester County and Mount Vernon City records, as of October 21, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 440 E SANDFORD BLVD, MOUNT VERNON, NY 10553-7500 |
| Owner Type | Company |
| Vesting | Company |
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 | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 511 S 1st Ave was $11,172, down 82.9% 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 | $11,172.00 (-82.95%) | ||
| 2025 | $65,519.00 | $6,500 (-) Land $800 Building $5,700 | $361,111 (+6.67%) Land $44,444 Building $316,667 |
| 2024 | $6,500 (-) Land $800 Building $5,700 | $338,542 (-10.94%) Land $41,667 Building $296,875 | |
| 2023 | $6,500 Land $800 Building $5,700 | $380,117 Land $46,784 Building $333,333 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 511 S 1st Ave in Zone X, an area of minimal flood risk, though there have been 12 flood claims nearby since 1978.
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 |
| Flood Insurance Cost | Premium on File median of 10 policies |
| Nearby Flood Policies | 10 in force |
| Nearby Flood Claims | 12 (1978–2021) |
| Claims Outside the SFHA | 7 of 12 |
| Most Recent Claim | Sep 2021 · Remnants Of Hurricane Ida |
| Claims by Event |
|
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 511 S 1st 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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