18473 Walnut Rd is a 1,834 square foot house on a 0.3 acre lot with 3 bedrooms and 1 bathroom. Based on Redfin's Castro Valley data, we estimate the home's value is $1,133,796.
Single-familyProperty Type
1957Year Built
0.3 acresLot Size
$618Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,133,796
$12K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 16.6% lower than the average sale price ($1.36M) 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
$1,926 (+3.1%)
$35,577 + $60,993
$96,570
2024
$1,868 (+3.0%)
$35,577 + $60,993
$96,570
2023
$1,814 (+3.1%)
$34,880 + $59,797
$94,677
2022
$1,759 (+3.1%)
$33,526 + $57,475
$91,001
2021
$1,706 (+2.6%)
$33,526 + $57,475
$91,001
2020
$1,663 (−1.0%)
$32,868 + $56,348
$89,216
2019
$1,680 (+3.1%)
$32,531 + $55,770
$88,301
2018
$1,629 (+2.9%)
$31,894 + $54,677
$86,571
2017
$1,582 (+5.2%)
$30,655 + $52,554
$83,209
2016
$1,504 (+7.0%)
$30,655 + $52,554
$83,209
2015
$1,405 (+3.3%)
$30,054 + $51,524
$81,578
2014
$1,360 (+2.6%)
$29,023 + $49,756
$78,779
2013
$1,325 (+3.0%)
$29,023 + $49,756
$78,779
2012
$1,287 (+1.6%)
$28,892 + $49,531
$78,423
2011
$1,266 (+1.0%)
$28,325 + $48,560
$76,885
2010
$1,253 (+0.6%)
$27,770 + $47,608
$75,378
2009
$1,246 (+6.9%)
$27,562 + $47,252
$74,814
2008
$1,166
$27,628 + $47,365
$74,993
Tax history for 18473 Walnut Rd
Year
Property tax
Land + Additions
Assessment*
2025
$1,926 (+3.1%)
$35,577 + $60,993
$96,570
2024
$1,868 (+3.0%)
$35,577 + $60,993
$96,570
2023
$1,814 (+3.1%)
$34,880 + $59,797
$94,677
2022
$1,759 (+3.1%)
$33,526 + $57,475
$91,001
2021
$1,706 (+2.6%)
$33,526 + $57,475
$91,001
2020
$1,663 (−1.0%)
$32,868 + $56,348
$89,216
2019
$1,680 (+3.1%)
$32,531 + $55,770
$88,301
2018
$1,629 (+2.9%)
$31,894 + $54,677
$86,571
2017
$1,582 (+5.2%)
$30,655 + $52,554
$83,209
2016
$1,504 (+7.0%)
$30,655 + $52,554
$83,209
2015
$1,405 (+3.3%)
$30,054 + $51,524
$81,578
2014
$1,360 (+2.6%)
$29,023 + $49,756
$78,779
2013
$1,325 (+3.0%)
$29,023 + $49,756
$78,779
2012
$1,287 (+1.6%)
$28,892 + $49,531
$78,423
2011
$1,266 (+1.0%)
$28,325 + $48,560
$76,885
2010
$1,253 (+0.6%)
$27,770 + $47,608
$75,378
2009
$1,246 (+6.9%)
$27,562 + $47,252
$74,814
2008
$1,166
$27,628 + $47,365
$74,993
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
R1
Single-Family Residence Districts
Single-family residence districts, hereinafter designated as R-1 districts, are established to provide for and protect established neighborhoods of one-family dwellings, and to provide space in suitable locations for additional development of this kind, together with appropriate community facilities and allowance for restricted interim cultivation of the soil compatible with such low-density residential development.
Permitted uses
Include but are not limited to:
Housing-Single unit
Agriculture-Cropland
Agriculture-Grove / orchard
Oct 16, 2015 • Final
Building
Remodel
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Room Information
# of Rooms: 6
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Average
Property Information
Subdivision Name: CASTRO VLY ORCHARDS
Living Sq. Ft: 1,834
Building Sq. Ft: 1,834
# of Units: 1
# of Stories: 1
Legal Description: MAP 25 PG 72 PART OF LOT 13
Lot Information
# of Buildings: 1
Land Sq. Ft: 12,920
Legal Lot Number: 13
Municipality Name: CASTRO VALLEY UNINCORP
Acres: 0.2966
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 3
Baths: 1.0
Sq. Ft.: 1,834
Stories: 1.0
Lot Size: 0.3 acres
Style: Single Family Residential
Year Built: 1957
Year Renovated: 1960
County: Alameda County
APN: 084D115800614
Home facts updated by county records on Jul 27, 2026
Around this home
Schools
Chabot Elementary School
Public K-5 • Assigned • 0.6mi
9/10
Creekside Middle School
Public 6-8 • Assigned • 1.9mi
10/10
Castro Valley High School
Public 9-12 • Assigned • 1.0mi
9/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Local insights from Redfin agents
Castro Valley's late-summer market shows a clear split. While median prices hold near $1.2M, increased inventory gives buyers leverage on older properties. However, immaculate homes still go pending in under 15 days. A strong, clean offer is key!
Strong buyer demand keeps the Castro Valley market moving incredibly fast. With homes frequently selling above their $1.2 million median price, decisive action is essential. To win here, buyers need to submit competitive offers quickly and minimize...