21663 Shadyspring Rd is a 1,812 square foot house on a 8,445 square foot lot. - it last sold on April 16, 1981 for $96,500. Based on Redfin's Castro Valley data, we estimate the home's value is $1,030,920.
Single-familyProperty Type
1976Year Built
8,445 sq ftLot Size
$569Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$1,030,920
$934K since sold in April 1981$4,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 2% lower than the average sale price ($1.05M) 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
Oct 7, 2025 • Final
Building
Remodel and reduce the size of the deck at the rear of the property according to the provided plans.
Remodel
Dec 6, 2018 • Final
Building
Remove and replace windows throughout an existing single-family home with new retrofit windows of the same size and style.
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
Exterior
Exterior Information
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Good
Property Information
Living Sq. Ft: 1,812
Building Sq. Ft: 1,812
# of Units: 1
Legal Description: MAP 46 PG 60 BLK 2 LOT 5
Lot Information
# of Buildings: 1
Land Sq. Ft: 8,445
Legal Lot Number: 5
Legal Block Number: 2
Municipality Name: HAYWARD UNINCORP
Acres: 0.1939
County Use Description: SINGLE FAMILY RESIDENTIAL HOME
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: —
Baths: —
Sq. Ft.: 1,812
Stories: —
Lot Size: 8,445 square feet
Style: Single Family Residential
Year Built: 1976
Year Renovated: 1977
County: Alameda County
APN: 415 019000100
Home facts updated by county records on Jul 27, 2026
Around this home
Schools
Fairview Elementary School
Public K-6 • Assigned • 1.8mi
2/10
Bret Harte Middle School
Public 7-8 • Assigned • 1.1mi
4/10
Hayward High School
Public 9-12 • Assigned • 1.3mi
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...