| Primary address | 21 Union Avenue, Mount Vernon |
| Zip code | 10550 |
| County | Westchester |
| Municipality | Mt Vernon |
| Neighborhood | Mount Vernon Central Business District |
| Parcel ID | 165.71-3164-23 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 11/17/2020 |
| Sale price | $750,000 |
| Arm's length | Register |
| Current property tax | $8,319 |
| Building class | Two Family Year-Round Residence (220) |
| Acreage | 0.11 |
| Units | 2 |
| Zoning district | Register |
| School district | Mount Vernon |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
Assessed at $12,000, the tax amount paid for 21 Union Avenue, Mount Vernon, NY 10550 is $7,768.
When was 21 Union Avenue, Mount Vernon, NY 10550 last sold and what was the last sale price?21 Union Avenue, Mount Vernon, NY 10550 was last sold in 11/17/2020 for $750,000.
How many residential units does this building have?This building has 2 residential unit(s).
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 21 Union Avenue, Mount Vernon, including title documents, transfer conditions, mortgages and liens.
*Here are the three most recent sales for this property.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 21 Union Avenue, Mount Vernon, NY 10550. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025 |
| Base tax | $7,768 |
| Current property tax | $8,319 |
| Market value | $666,667 |
| Assessed value | $12,000 |
Here's the assessment & property tax history for 21 Union Avenue, Mount Vernon, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|---|
| 2025 | $666,667 | $12,000 | 647.37 | $7,768 | -0.11% |
| 2024 | $625,000 | $12,000 | 648.11 | $7,777 | -58.39% |
| 2023 | $701,754 | $12,000 | 1557.71 | $18,693 | +1.03% |
| 2022 | $597,015 | $12,000 | 1541.8683 | $18,502 | +1.48% |
| 2021 | $545,455 | $12,000 | 1519.4252 | $18,233 | +2.96% |
Create a free account to unlock extended information for 21 Union Avenue, Mount Vernon, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | X (See more on map) |
Access the detailed traffic volume map for 21 Union Avenue, Mount Vernon to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Amani Public Charter School | 6 | Charter | 5-8 | 332 | 0.17 |
| Emmanuel Children's Mission School | NR | Private | PK, K-8 | 0 | 0.27 |
| Emmanuel Children's Mission School | NR | Private | PK, K-8 | 0 | 0.27 |
| Emmanuel Children's Mission School | NR | Private | PK, K-8 | 327 | 0.28 |
| Emmanuel Children's Mission School | NR | Private | PK, K-8 | 327 | 0.28 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Amani Public Charter School | 6 | Charter | 5-8 | 332 | 0.17 |
| Emmanuel Children's Mission School | NR | Private | PK, K-8 | 0 | 0.27 |
| Emmanuel Children's Mission School | NR | Private | PK, K-8 | 327 | 0.28 |
| Denzel Washington School-Arts | 6 | Public | 6-12 | 383 | 0.30 |
| Our Lady of Victory School | NR | Private | PK-8 | 329 | 0.38 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Denzel Washington School-Arts | 6 | Public | 6-12 | 383 | 0.30 |
| Fortress Christian Academy | NR | Private | K-12 | 0 | 0.56 |
| Nelson R Mandela/DR Hosea Zollicoffer High School | NR | Public | 9-12 | 80 | 0.67 |
| Mount Vernon STEAM Academy | NR | Public | 9-12 | 756 | 0.68 |
| Rebecca Turner Academy | 5 | Public | 9-12 | 218 | 1.00 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Union Avenue, Mount Vernon.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 110 Brookside Ave, Mount Vernon | 07/01/2019 | $335,000 | |
| 90 Brookside Ave, Mount Vernon | 02/07/2025 | $758,775 | |
| 82 Brookside Ave, Mount Vernon | 08/15/2002 | $310,000 | |
| 63 Beechwood Ave, Mount Vernon | 10/16/2024 | $515,000 | |
| 36 Grandview Ave, Mount Vernon | |||
| 86 Brookside Ave, Mount Vernon | 03/06/2000 | $10 | |
| 65 Beechwood Ave, Mount Vernon | |||
| 108 Brookside Ave, Mount Vernon | |||
| 2 Claremont Pl, Mount Vernon | |||
| 74 Brookside Ave, Mount Vernon | 04/09/2009 | $275,000 | |
| 10 Claremont Ave, Mount Vernon | 04/15/2011 | $17,165,000 | |
| 150 E 1st St, Mount Vernon | 16,218 | 09/23/2016 | $889,500 |
| 78 Brookside Ave, Mount Vernon | 06/08/2007 | ||
| 17 Union Ave, Mount Vernon | 03/24/2008 | ||
| 1 N Fulton Ave, Mount Vernon | 06/13/2018 | ||
| 100 Brookside Ave, Mount Vernon | |||
| 72 Brookside Ave, Mount Vernon | 10/09/2007 | $480,000 | |
| 67 Beechwood Ave, Mount Vernon | |||
| 15 Union Ave, Mount Vernon | 09/22/1998 | ||
| 125 Washington St, Mount Vernon | 01/18/2002 | $310,000 |
