21738 Shadyspring Rd is a 2,840 square foot house on a 6,548 square foot lot. - it last sold on October 17, 1980 for $115,000. Based on Redfin's Castro Valley data, we estimate the home's value is $1,105,308.
Single-familyProperty Type
1977Year Built
6,548 sq ftLot Size
$389Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,105,308
$990K since sold in October 1980$32K since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 14.6% higher than the average sale price ($964K) 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
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
Property details
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Good
Property Information
Living Sq. Ft: 2,840
Building Sq. Ft: 2,840
# of Units: 1
Legal Description: TRACT 2356 BLK 1 LOT 11
Lot Information
# of Buildings: 1
Land Sq. Ft: 6,548
Legal Lot Number: 11
Legal Block Number: 1
Municipality Name: HAYWARD UNINCORP
Acres: 0.1503
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: —
Baths: —
Sq. Ft.: 2,840
Stories: —
Lot Size: 6,548 square feet
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1978
County: Alameda County
APN: 415 020000600
Home facts updated by county records on Jul 27, 2026
Around this home
Schools
Fairview Elementary School
Public K-6 • Assigned • 1.7mi
2/10
Bret Harte Middle School
Public 7-8 • Assigned • 1.0mi
4/10
Hayward High School
Public 9-12 • Assigned • 1.2mi
5/10
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...