18200 Walnut Rd is a 2,470 square foot house on a 0.28 acre lot with 4 bedrooms and 2 bathrooms. - it last sold on October 16, 2003 for $690,000. Based on Redfin's Castro Valley data, we estimate the home's value is $1,541,904.
Single-familyProperty Type
1975Year Built
0.28 acresLot Size
$624Est. Price/Sq.Ft.
2 car garageParking
Source:Public Records
Redfin Estimate
$1,541,905
$852K since sold in October 2003$15K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 9.5% higher than the average sale price ($1.41M) of 6 comparable homes.
bridgeMLS, Bay East AOR, or Contra Costa AOR #40111310
Jun 16, 2016
Listing Removed
—
bridgeMLS, Bay East AOR, or Contra Costa AOR #40117156
Jun 16, 2016
Listing Removed
—
Public Records
Oct 16, 2003
Sold
$690,000
$279/sq ft
Public Records
Jun 1, 1990
Sold
$347,000
$140/sq ft
Public Records
Sep 22, 1987
Sold
$224,000
$91/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$12,362 (+2.2%)
$294,293 + $686,685
$980,978
2024
$12,092 (+1.6%)
$294,293 + $686,685
$980,978
2023
$11,905 (+1.9%)
$288,524 + $673,224
$961,748
2022
$11,683 (+2.6%)
$277,322 + $647,084
$924,406
2021
$11,387 (+2.3%)
$277,322 + $647,084
$924,406
2020
$11,128 (−1.8%)
$271,886 + $634,401
$906,287
2019
$11,337 (+2.9%)
$269,100 + $627,900
$897,000
2018
$11,016 (+2.7%)
$263,823 + $615,588
$879,411
2017
$10,728 (+5.1%)
$253,579 + $591,684
$845,263
2016
$10,208 (+13.9%)
$253,579 + $591,684
$845,263
2015
$8,962 (−0.8%)
$248,607 + $580,083
$828,690
2014
$9,034 (+20.2%)
$229,200 + $534,800
$764,000
2013
$7,513 (−2.6%)
$229,200 + $534,800
$764,000
2012
$7,716 (−7.4%)
$189,000 + $441,000
$630,000
2011
$8,334 (−3.3%)
$194,700 + $454,300
$649,000
2010
$8,620 (+2.7%)
$210,000 + $490,000
$700,000
2009
$8,395 (−4.6%)
$217,500 + $507,500
$725,000
2008
$8,804
$210,900 + $492,100
$703,000
Tax history for 18200 Walnut Rd
Year
Property tax
Land + Additions
Assessment*
2025
$12,362 (+2.2%)
$294,293 + $686,685
$980,978
2024
$12,092 (+1.6%)
$294,293 + $686,685
$980,978
2023
$11,905 (+1.9%)
$288,524 + $673,224
$961,748
2022
$11,683 (+2.6%)
$277,322 + $647,084
$924,406
2021
$11,387 (+2.3%)
$277,322 + $647,084
$924,406
2020
$11,128 (−1.8%)
$271,886 + $634,401
$906,287
2019
$11,337 (+2.9%)
$269,100 + $627,900
$897,000
2018
$11,016 (+2.7%)
$263,823 + $615,588
$879,411
2017
$10,728 (+5.1%)
$253,579 + $591,684
$845,263
2016
$10,208 (+13.9%)
$253,579 + $591,684
$845,263
2015
$8,962 (−0.8%)
$248,607 + $580,083
$828,690
2014
$9,034 (+20.2%)
$229,200 + $534,800
$764,000
2013
$7,513 (−2.6%)
$229,200 + $534,800
$764,000
2012
$7,716 (−7.4%)
$189,000 + $441,000
$630,000
2011
$8,334 (−3.3%)
$194,700 + $454,300
$649,000
2010
$8,620 (+2.7%)
$210,000 + $490,000
$700,000
2009
$8,395 (−4.6%)
$217,500 + $507,500
$725,000
2008
$8,804
$210,900 + $492,100
$703,000
*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 27, 2022 • Final
Building
Perform a kitchen remodel with like-for-like replacements. Replace the gas range, plumbing fixtures, and range hood. Upgrade the electrical sub-panel and update the electrical, mechanical, and plumbing systems.
Electrical
Gas
Kitchen
Plumbing
Remodel
Nov 9, 2012 • Final
Building
Construct a dry stack retaining wall using geogrid according to approved plans and specifications.
Grading
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
Heating & Cooling
Heating Type: Forced Air
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 8
Exterior
Exterior Information
Physical Condition: Good
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Average
Exterior Wall: Stucco
Building Type: Detached
View Information
View: Good
Property Information
Subdivision Name: CASTRO VLY ORCHARDS
Living Sq. Ft: 2,470
Building Sq. Ft: 2,470
# of Units: 1
Legal Description: OFFICIAL RECS 25 PG 72 PART OF LOT 24,25
Parking & Garage Information
# of Parking Spaces: 2
Lot Information
# of Buildings: 1
Land Sq. Ft: 12,391
Legal Lot Number: 24
Municipality Name: CASTRO VALLEY UNINCORP
Acres: 0.2845
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Utility Information
Sewer Type: Public
Water Service Type: Public
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 4
Baths: 2.0
Sq. Ft.: 2,470
Stories: —
Lot Size: 0.28 acres
Style: Single Family Residential
Year Built: 1975
Year Renovated: 1982
County: Alameda County
APN: 084D116500910
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 • 1.8mi
10/10
Castro Valley High School
Public 9-12 • Assigned • 0.9mi
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...