Google street view image for 21730 Shadyspring Rd, Castro Valley, CA 94546

Off Market Dec 1986 for $217K

$1,280,692

Est. refi paymentEst. refi $929/mo

•

3 ba

•

2,650

sq ft

21730 Shadyspring Rd, Castro Valley, CA 94546

About this home

21730 Shadyspring Rd is a 2,650 square foot house on a 7,479 square foot lot with 3 bedrooms and 3 bathrooms. - it last sold on December 18, 1986 for $217,500. Based on Redfin's Castro Valley data, we estimate the home's value is $1,280,692.

Single-familyProperty Type

1979Year Built

7,479 sq ftLot Size

$483Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,280,692

$1.1M since sold in December 1986$2,000 since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 26.2% higher than the average sale price ($1.01M) of 6 comparable homes.

SOLD MAY 22, 2026
$1,075,000
A
3 beds2 baths1,876 sq ft
21723 Shadyspring Rd, Castro Valley, CA 94546
SOLD APR 10, 2026
$1,275,000
B
3 beds2.5 baths2,239 sq ft
21928 Baywood Ave, Castro Valley, CA 94546
SOLD MAR 27, 2026
$825,000
C
3 beds2 baths1,557 sq ft
1516 Grove Way, Hayward, CA 94546
SOLD JAN 22, 2026
$977,000
D
3 beds2.5 baths1,773 sq ft
1933 Riverbank, Castro Valley, CA 94546
SOLD JUL 9, 2026
$984,777
E
3 beds2 baths1,650 sq ft
21451 Rizzo Ave, Castro Valley, CA 94546
SOLD JUL 24, 2026
$950,000
F
3 beds2.5 baths1,825 sq ft
22631 5th St, Hayward, CA 94541

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Earn from this home

Sell

$1,212,456

Est. take-home

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Refinance

Est. cash available

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Rent

$4,545/mo

Redfin rental estimate

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Market trends in 94546, CA

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

105.6%

+0.7% MoM

Median sale price

$1.1M

$45K MoM

Avg. days on market

13d

1 days MoM

Recently sold homes

100

5 MoM

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See all

Provided by Redfin

Sale history for 21730 Shadyspring Rd

Year

Property tax

Land + Additions

Assessment*

2025

$5,949 (+2.6%)

$118,310 + $306,319

$424,629

2024

$5,797 (+2.0%)

$118,310 + $306,319

$424,629

2023

$5,683 (+2.4%)

$115,990 + $300,312

$416,302

2022

$5,548 (+1.2%)

$111,487 + $288,652

$400,139

2021

$5,482 (+1.4%)

$111,487 + $288,652

$400,139

2020

$5,408 (−0.7%)

$109,301 + $282,992

$392,293

2019

$5,445 (+6.3%)

$108,180 + $280,091

$388,271

2018

$5,121 (+2.6%)

$106,059 + $274,600

$380,659

2017

$4,993 (+6.1%)

$101,941 + $263,938

$365,879

2016

$4,706 (+2.8%)

$101,941 + $263,938

$365,879

2015

$4,580 (+5.7%)

$99,943 + $258,764

$358,707

2014

$4,333 (+1.3%)

$96,513 + $249,885

$346,398

2013

$4,277 (+2.2%)

$96,513 + $249,885

$346,398

2012

$4,186 (+1.9%)

$96,078 + $248,757

$344,835

2011

$4,109 (+2.2%)

$94,194 + $243,880

$338,074

2010

$4,020 (−1.3%)

$92,348 + $239,099

$331,447

2009

$4,073 (+4.1%)

$91,658 + $237,314

$328,972

2008

$3,912

$91,876 + $237,879

$329,755

Tax history for 21730 Shadyspring Rd

Year

Property tax

Land + Additions

Assessment*

2025

$5,949 (+2.6%)

$118,310 + $306,319

$424,629

2024

$5,797 (+2.0%)

$118,310 + $306,319

$424,629

2023

$5,683 (+2.4%)

$115,990 + $300,312

$416,302

2022

$5,548 (+1.2%)

$111,487 + $288,652

$400,139

2021

$5,482 (+1.4%)

$111,487 + $288,652

$400,139

2020

$5,408 (−0.7%)

$109,301 + $282,992

$392,293

2019

$5,445 (+6.3%)

$108,180 + $280,091

$388,271

2018

$5,121 (+2.6%)

$106,059 + $274,600

$380,659

2017

$4,993 (+6.1%)

$101,941 + $263,938

$365,879

2016

$4,706 (+2.8%)

$101,941 + $263,938

$365,879

2015

$4,580 (+5.7%)

$99,943 + $258,764

$358,707

2014

$4,333 (+1.3%)

$96,513 + $249,885

$346,398

2013

$4,277 (+2.2%)

$96,513 + $249,885

$346,398

2012

$4,186 (+1.9%)

$96,078 + $248,757

$344,835

2011

$4,109 (+2.2%)

$94,194 + $243,880

$338,074

2010

$4,020 (−1.3%)

$92,348 + $239,099

$331,447

2009

$4,073 (+4.1%)

$91,658 + $237,314

$328,972

2008

$3,912

$91,876 + $237,879

$329,755

*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

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

Interior

Room Information
# of Rooms: 7

Exterior

Exterior Information
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Good

Property Information
Living Sq. Ft: 2,650
Building Sq. Ft: 2,650
# of Units: 1
# of Stories: 1
Legal Description: TRACT 2356 BLK 1 LOT 10

Parking & Garage Information
# of Parking Spaces: 2

Lot Information
# of Buildings: 1
Land Sq. Ft: 7,479
Legal Lot Number: 10
Legal Block Number: 1
Municipality Name: HAYWARD UNINCORP
Acres: 0.1717
County Use Description: SINGLE FAMILY RESIDENTIAL HOME

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 2,650
Stories: 1.0
Lot Size: 7,479 square feet
Style: Single Family Residential
Year Built: 1979
Year Renovated: 1980
County: Alameda County
APN: 415 020000700

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!
2 weeks ago • Castro Valley
Johnny Singh
Redfin Premier agent
146 deals
Was this helpful?
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...
1 month ago • Castro Valley
Karan Kandel
Redfin agent
13 deals
Was this helpful?

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

4/10 Heat Factor

7 days above 88° expected this year, 13 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

7/10 Air Factor

12 unhealthy days expected this year, 12 days in 30 years

Provided by First Street

Historical weather

Castro Valley, CA • 94546

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 11.2 hours in June and 4.9 hours in December, placing it above the U.S. average for solar exposure.

11.2 hrs

4.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.22M – $1.47M

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Home values near 21730 Shadyspring Rd

Data from public records.

Address	Redfin Estimate
21738 Shadyspring Rd, Castro Valley, CA - Beds \| - Baths \| 2840 Sq. Ft.	$1,105,308
21762 Shadyspring Rd, Castro Valley, CA 3 Beds \| 3 Baths \| 3051 Sq. Ft.	$1,237,614

Address	Redfin Estimate
21715 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2270 Sq. Ft.	$1,202,022
21722 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2137 Sq. Ft.	$1,193,687

Address	Redfin Estimate
21694 Shadyspring Rd, Castro Valley, CA 3 Beds \| 3 Baths \| 2456 Sq. Ft.	$1,366,339
21731 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3.5 Baths \| 2136 Sq. Ft.	$1,432,487

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 94546, CA

Sale history for 21730 Shadyspring Rd

Tax history for 21730 Shadyspring Rd

Zoning and permits

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94546

Home values near 21730 Shadyspring Rd

More real estate resources