521 Whipple Rd is a 1,722 square foot house on a 10,100 square foot lot with 4 bedrooms and 2 bathrooms. Based on Redfin's Union City data, we estimate the home's value is $977,728.
Single-familyProperty Type
1949Year Built
10,100 sq ftLot Size
$568Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$977,728
$5,000 since September
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 4.6% higher than the average sale price ($935K) of 6 comparable homes.
As the MLS and public records start to fill up, we'll list the details here.
Year
Property tax
Land + Additions
Assessment*
2025
$1,855 (−25.7%)
$15,752 + $65,691
$81,443
2024
$2,497 (+6.5%)
$15,443 + $64,403
$79,846
2023
$2,345 (+3.6%)
$15,141 + $63,141
$78,282
2022
$2,264 (+2.4%)
$14,553 + $60,689
$75,242
2021
$2,211 (−1.5%)
$14,553 + $60,689
$75,242
2020
$2,245 (+0.2%)
$14,267 + $59,499
$73,766
2019
$2,240 (+2.8%)
$14,121 + $58,889
$73,010
2018
$2,180 (+2.7%)
$13,844 + $57,735
$71,579
2017
$2,123 (+3.6%)
$13,307 + $55,493
$68,800
2016
$2,049 (+2.5%)
$13,307 + $55,493
$68,800
2015
$1,999 (+4.0%)
$13,046 + $54,405
$67,451
2014
$1,923 (+2.2%)
$12,598 + $52,538
$65,136
2013
$1,881 (+6.2%)
$12,598 + $52,538
$65,136
2012
$1,772 (+2.2%)
$12,541 + $52,301
$64,842
2011
$1,734 (+2.3%)
$12,295 + $51,276
$63,571
2010
$1,695 (+1.7%)
$12,054 + $50,270
$62,324
2009
$1,668 (+3.8%)
$11,964 + $49,895
$61,859
2008
$1,607
$11,993 + $50,014
$62,007
Tax history for 521 Whipple Rd
Year
Property tax
Land + Additions
Assessment*
2025
$1,855 (−25.7%)
$15,752 + $65,691
$81,443
2024
$2,497 (+6.5%)
$15,443 + $64,403
$79,846
2023
$2,345 (+3.6%)
$15,141 + $63,141
$78,282
2022
$2,264 (+2.4%)
$14,553 + $60,689
$75,242
2021
$2,211 (−1.5%)
$14,553 + $60,689
$75,242
2020
$2,245 (+0.2%)
$14,267 + $59,499
$73,766
2019
$2,240 (+2.8%)
$14,121 + $58,889
$73,010
2018
$2,180 (+2.7%)
$13,844 + $57,735
$71,579
2017
$2,123 (+3.6%)
$13,307 + $55,493
$68,800
2016
$2,049 (+2.5%)
$13,307 + $55,493
$68,800
2015
$1,999 (+4.0%)
$13,046 + $54,405
$67,451
2014
$1,923 (+2.2%)
$12,598 + $52,538
$65,136
2013
$1,881 (+6.2%)
$12,598 + $52,538
$65,136
2012
$1,772 (+2.2%)
$12,541 + $52,301
$64,842
2011
$1,734 (+2.3%)
$12,295 + $51,276
$63,571
2010
$1,695 (+1.7%)
$12,054 + $50,270
$62,324
2009
$1,668 (+3.8%)
$11,964 + $49,895
$61,859
2008
$1,607
$11,993 + $50,014
$62,007
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
RS 6000
Single-Family Residential District
The purpose of this chapter is to define allowable uses and provide property development standards for the RS zoning districts to further the public health, safety and general welfare in a manner consistent with the City’s General Plan.
Permitted uses
Include but are not limited to:
Agriculture
Greenhouse / nursery
Automotive repair garage
Housing-Single unit
Housing-Student
Housing-Mobile home park
Property details
Interior
Room Information
# of Rooms: 7
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Average
Property Information
Living Sq. Ft: 1,722
Building Sq. Ft: 1,722
# of Units: 1
# of Stories: 2
Parking & Garage Information
Parking Type: Carport
Garage / Carport Type: Carport
Lot Information
# of Buildings: 1
Land Sq. Ft: 10,100
Municipality Name: UNION CITY INCORP
Acres: 0.2319
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Financial
Assessor Information
Assessment Year: 2026
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 1,722
Stories: 2.0
Lot Size: 10,100 square feet
Style: Single Family Residential
Year Built: 1949
Year Renovated: 1949
County: Alameda County
APN: 087 009206802
Home facts updated by county records on Sep 17, 2026
Around this home
Schools
Hillview Crest Elementary School
Public K-5 • Assigned • 0.8mi
6/10
Cesar Chavez Middle School
Public 6-8 • Assigned • 1.6mi
4/10
James Logan High School
Public 9-12 • Assigned • 1.1mi
8/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Union City's fall market offers balanced buyer opportunities. Median prices sit near $1.3M with homes averaging 24 days on market. While turnkey homes move fast with multiple offers, you'll find breathing room to negotiate on older properties. Bring...