18838 Sandy Rd is a 2,317 square foot house on a 0.34 acre lot with 3 bedrooms and 3 bathrooms. - it last sold on May 29, 1991 for $290,000. Based on Redfin's Castro Valley data, we estimate the home's value is $1,359,100.
Single-familyProperty Type
1947Year Built
0.34 acresLot Size
$587Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,359,100
$1.1M since sold in May 1991$5,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 5.7% 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
Feb 16, 2023 • Final
Building
Remove and replace the existing roofing on a residential building with new composition asphalt shingles. The project includes a tear-off of the existing roof and installation on the existing roof deck.
Roofing
Jan 28, 2019 • Final
Building
Remove and replace a tankless water heater.
Plumbing
Water heater
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
Property Information
Living Sq. Ft: 2,317
Building Sq. Ft: 2,317
# of Units: 1
# of Stories: 1
Legal Description: TRACT 733 BLK C LOT 5
Parking & Garage Information
# of Parking Spaces: 2
Lot Information
# of Buildings: 1
Land Sq. Ft: 14,668
Legal Lot Number: 5
Legal Block Number: C
Municipality Name: CASTRO VALLEY UNINCORP
Acres: 0.3367
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 3
Baths: 3.0
Sq. Ft.: 2,317
Stories: 1.0
Lot Size: 0.34 acres
Style: Single Family Residential
Year Built: 1947
Year Renovated: 1961
County: Alameda County
APN: 084C081500500
Home facts updated by county records on Nov 14, 2025
Around this home
Schools
Proctor Elementary School
Public K-5 • Assigned • 0.7mi
9/10
Creekside Middle School
Public 6-8 • Assigned • 0.7mi
10/10
Castro Valley High School
Public 9-12 • Assigned • 0.6mi
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...