18914 Walnut Rd is a 2,043 square foot house on a 8,100 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on October 31, 1990 for $212,000. Based on Redfin's Castro Valley data, we estimate the home's value is $1,304,680.
Single-familyProperty Type
1950Year Built
8,100 sq ftLot Size
$639Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,304,680
$1.1M since sold in October 1990$67K since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 1.1% higher than the average sale price ($1.29M) of 6 comparable homes.
*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
Aug 17, 2023 • Final
Building
Construct a two-story addition to a single-family home. The project includes a first-floor addition for an indoor pool and exercise room, a deck with skylights on the second level, and the installation of a wall heater and pool equipment on an exterior concrete pad.
Addition
ADU
HVAC
Dec 11, 2003 • Final
Building
Construct an exterior kitchen and add a second floor containing a bedroom and bathroom.
Addition
Kitchen
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
Heating & Cooling
Heating Type: Forced Air
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 6
Exterior
Exterior Information
Physical Condition: Good
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Average
Exterior Wall: Wood Siding
Building Type: Detached
Pool Information
Has Pool
Property Information
Subdivision Name: CASTRO VLY ORCHARDS
Living Sq. Ft: 2,043
Building Sq. Ft: 2,043
# of Units: 1
# of Stories: 1
Legal Description: OFFICIAL RECS 26 PG 72 PART OF LOT 15
Parking & Garage Information
# of Parking Spaces: 2
Lot Information
# of Buildings: 1
Land Sq. Ft: 8,100
Legal Lot Number: 15
Municipality Name: CASTRO VALLEY UNINCORP
Acres: 0.186
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: 3.0
Sq. Ft.: 2,043
Stories: 1.0
Lot Size: 8,100 square feet
Style: Single Family Residential
Year Built: 1950
Year Renovated: 1975
County: Alameda County
APN: 084D116802100
Home facts updated by county records on Jul 27, 2026
Around this home
Schools
Chabot Elementary School
Public K-5 • Assigned • 0.3mi
9/10
Creekside Middle School
Public 6-8 • Assigned • 1.8mi
10/10
Castro Valley High School
Public 9-12 • Assigned • 0.8mi
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...