Google street view image for 21670 Shadyspring Rd, Castro Valley, CA 94546

Off market jul 2014 for $658K

$1,275,293

Est. refi paymentEst. refi $4,392/mo

•

2 ba

•

2,516

sq ft

21670 Shadyspring Rd, Castro Valley, CA 94546

About this home

21670 Shadyspring Rd is a 2,516 square foot house on a 6,861 square foot lot with 4 bedrooms and 2 bathrooms. - it last sold on July 01, 2014 for $658,000. Based on Redfin's Castro Valley data, we estimate the home's value is $1,275,293.

Single-familyProperty Type

1977Year Built

6,861 sq ftLot Size

$507Est. Price/Sq.Ft.

2 car garageParking

Source:Public Records

Redfin Estimate

$1,275,293

$617K since sold in July 2014$21K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 20.2% higher than the average sale price ($1.06M) of 6 comparable homes.

SOLD SEP 11, 2026
$1,170,000
A
4 beds3 baths2,474 sq ft
21714 Shadyspring Rd, Castro Valley, CA 94546
SOLD SEP 16, 2026
$920,000
B
3 beds2.5 baths1,632 sq ft
21671 Shady Spring Rd, Castro Valley, CA 94546
SOLD MAY 22, 2026
$1,075,000
C
3 beds2 baths1,876 sq ft
21723 Shadyspring Rd, Castro Valley, CA 94546
SOLD JUL 27, 2026
$1,236,737
D
4 beds2.5 baths2,528 sq ft
16683 Kildare Rd, Castro Valley, CA 94578
SOLD JUN 2, 2026
$980,000
E
4 beds2 baths1,552 sq ft
2632 Renton Way, Castro Valley, CA 94546
SOLD JUL 9, 2026
$984,777
F
3 beds2 baths1,650 sq ft
21451 Rizzo Ave, Castro Valley, CA 94546

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Earn from this home

Sell

$827,340

Est. take-home

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Est. cash available

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Rent

$4,572/mo

Redfin rental estimate

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Market trends in 94546, CA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

104.0%

+0.6% MoM

Median sale price

$1.1M

$564 MoM

Avg. days on market

29d

10 days MoM

Recently sold homes

1 MoM

New listings for sale

OPEN TODAY, 10AM TO 1PM
$879,000
3 beds1 bath1,106 sq ft
3443 Middleton Ave, Castro Valley, CA 94546
NEW 17 HRS AGO
$1,290,000
4 beds2.5 baths1,896 sq ft
18362 Carlwyn Dr, Castro Valley, CA 94546
$999,000
4 beds2 baths1,680 sq ft
20273-20275 Stanton Ave, Castro Valley, CA 94546
OPEN TODAY, 10AM TO 1PM
$1,495,000
4 beds3 baths2,550 sq ft
5280 Dunnigan Ct, Castro Valley, CA 94546
(415) 655-9007
EARLY ACCESS
$550,000
2 beds2 baths1,393 sq ft
21239 Gary Dr #206, Hayward, CA 94546
OPEN SUN, 12:30PM TO 3:30PM
$796,000
2 beds1 bath906 sq ft
2247 Lessley Ave, Castro Valley, CA 94546
OPEN TODAY, 10:30AM TO 1PM
$925,000
3 beds1 bath1,088 sq ft
18482 Ogilvie Dr, Castro Valley, CA 94546
OPEN TODAY, 11AM TO 1PM
$1,198,000
3 beds2.5 baths1,823 sq ft
3466 Arcadian Dr, Castro Valley, CA 94546
VIDEO TOUR
$975,000
3 beds1.5 baths1,311 sq ft
4848 Mancini Dr, Castro Valley, CA 94546
$599,000
2 beds2.5 baths866 sq ft
20115 Redwood Rd #10, Castro Valley, CA 94546
See all

Provided by Redfin

Sale history for 21670 Shadyspring Rd

Year

Property tax

Land + Additions

Assessment*

2025

$3,708 (+2.8%)

$119,740 + $128,666

$248,406

2024

$3,607 (+2.3%)

$117,393 + $126,144

$243,537

2023

$3,524 (+2.7%)

$115,092 + $123,671

$238,763

2022

$3,431 (+1.5%)

$110,623 + $118,869

$229,492

2021

$3,382 (+1.5%)

$110,623 + $118,869

$229,492

2020

$3,331 (−0.6%)

$108,455 + $116,540

$224,995

2019

$3,350 (+6.1%)

$107,343 + $115,345

$222,688

2018

$3,157 (+2.7%)

$105,239 + $113,084

$218,323

2017

$3,075 (+3.4%)

$101,153 + $108,694

$209,847

2016

$2,973 (+3.1%)

$101,153 + $108,694

$209,847

2015

$2,883 (−49.0%)

$99,170 + $106,563

$205,733

2014

$5,655 (+1.2%)

$138,294 + $322,686

$460,980

2013

$5,591 (+2.1%)

$138,294 + $322,686

$460,980

2012

$5,477 (−3.3%)

$137,669 + $321,228

$458,897

2011

$5,664 (+155.1%)

$134,970 + $314,930

$449,900

2010

$2,220 (−0.9%)

$139,500 + $325,500

$465,000

2009

$2,240 (+5.2%)

$36,324 + $127,397

$163,721

2008

$2,129

$36,410 + $127,701

$164,111

Tax history for 21670 Shadyspring Rd

Year

Property tax

Land + Additions

Assessment*

2025

$3,708 (+2.8%)

$119,740 + $128,666

$248,406

2024

$3,607 (+2.3%)

$117,393 + $126,144

$243,537

2023

$3,524 (+2.7%)

$115,092 + $123,671

$238,763

2022

$3,431 (+1.5%)

$110,623 + $118,869

$229,492

2021

$3,382 (+1.5%)

$110,623 + $118,869

$229,492

2020

$3,331 (−0.6%)

$108,455 + $116,540

$224,995

2019

$3,350 (+6.1%)

$107,343 + $115,345

$222,688

2018

$3,157 (+2.7%)

$105,239 + $113,084

$218,323

2017

$3,075 (+3.4%)

$101,153 + $108,694

$209,847

2016

$2,973 (+3.1%)

$101,153 + $108,694

$209,847

2015

$2,883 (−49.0%)

$99,170 + $106,563

$205,733

2014

$5,655 (+1.2%)

$138,294 + $322,686

$460,980

2013

$5,591 (+2.1%)

$138,294 + $322,686

$460,980

2012

$5,477 (−3.3%)

$137,669 + $321,228

$458,897

2011

$5,664 (+155.1%)

$134,970 + $314,930

$449,900

2010

$2,220 (−0.9%)

$139,500 + $325,500

$465,000

2009

$2,240 (+5.2%)

$36,324 + $127,397

$163,721

2008

$2,129

$36,410 + $127,701

$164,111

*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

Dec 30, 2024 • Final

Building

Install a roof-mounted solar photovoltaic system on a residential building.

Battery

Electrical

Solar

Dec 19, 2016 • Final

Building

Install a roof-mounted photovoltaic system.

Electrical

Solar

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

Room Information
# of Rooms: 8

Exterior

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

Property Information
Living Sq. Ft: 2,516
Building Sq. Ft: 2,516
# of Units: 1
# of Stories: 1

Parking & Garage Information
# of Parking Spaces: 2

Lot Information
# of Buildings: 1
Land Sq. Ft: 6,861
Legal Lot Number: 3
Legal Block Number: 1
Municipality Name: HAYWARD UNINCORP
Acres: 0.1575
County Use Description: SINGLE FAMILY RESIDENTIAL HOME

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 4
Baths: 2.0
Sq. Ft.: 2,516
Stories: 1.0
Lot Size: 6,861 square feet
Style: Single Family Residential
Year Built: 1977
Year Renovated: 1978
County: Alameda County
APN: 415 020001400

Home facts updated by county records on Sep 16, 2026

Around this home

Schools

K - 12
Preschool & daycare

Fairview Elementary School

Public K-6 • Assigned • 1.7mi

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 remains a highly competitive market. On average, homes are selling for 103.7% of their asking price, with nearly 60% of properties closing above list price.
3 weeks ago • Castro Valley
Karan Kandel
Redfin agent
12 deals
Was this helpful?
Castro Valley's fall market offers great buyer leverage. While median prices hold steady around $1.2M, increased inventory gives you room to negotiate on homes needing updates. Turnkey properties still move fast in under 15 days, so act quickly with...
1 month ago • Castro Valley
Johnny Singh
Redfin Premier agent
139 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, 14 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

$1.21M – $1.47M

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Home values near 21670 Shadyspring Rd

Data from public records.

Address	Redfin Estimate
21715 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2270 Sq. Ft.	$1,171,301
21663 Shadyspring Rd, Castro Valley, CA - Beds \| - Baths \| 1812 Sq. Ft.	$1,012,556
21639 Shadyspring Rd, Castro Valley, CA 3 Beds \| 2 Baths \| 1944 Sq. Ft.	$1,244,127
21707 Shadyspring Rd, Castro Valley, CA 3 Beds \| 2 Baths \| 1689 Sq. Ft.	$1,202,934
21695 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 1877 Sq. Ft.	$947,951
21656 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2485 Sq. Ft.	$1,191,761
1867 Grove Way, Castro Valley, CA 3 Beds \| 2 Baths \| 1794 Sq. Ft.	$946,896

Address	Redfin Estimate
21694 Shadyspring Rd, Castro Valley, CA 3 Beds \| 3 Baths \| 2456 Sq. Ft.	$1,348,852
21683 Shadyspring Rd, Castro Valley, CA 3 Beds \| 2 Baths \| 2372 Sq. Ft.	$1,257,683
21706 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2456 Sq. Ft.	$1,393,129
21650 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2493 Sq. Ft.	$1,249,829
21682 Shadyspring Rd, Castro Valley, CA 4 Beds \| 2.5 Baths \| 2466 Sq. Ft.	$1,461,049
1878 Grove Way, Castro Valley, CA 3 Beds \| 2 Baths \| 1575 Sq. Ft.	$955,715
1873 Grove Way, Castro Valley, CA 3 Beds \| 3 Baths \| 1900 Sq. Ft.	$1,071,064

Address	Redfin Estimate
21651 Shadyspring Rd, Castro Valley, CA 3 Beds \| 2 Baths \| 2517 Sq. Ft.	$1,306,035
21722 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2137 Sq. Ft.	$1,141,281
21714 Shadyspring Rd, Castro Valley, CA 4 Beds \| 3 Baths \| 2474 Sq. Ft.	$1,334,731
21671 Shadyspring Rd, Castro Valley, CA 3 Beds \| 2.5 Baths \| 1632 Sq. Ft.	$1,074,028
21631 Shadyspring Rd, Castro Valley, CA 3 Beds \| 2 Baths \| 2185 Sq. Ft.	$1,268,375
21674 Gail Dr, Castro Valley, CA 3 Beds \| 2 Baths \| 2225 Sq. Ft.	$1,201,437
21686 Gail Dr, Castro Valley, CA 4 Beds \| 3 Baths \| 2030 Sq. Ft.	$1,274,929

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About this home

Redfin Estimate

Earn from this home

Market trends in 94546, CA

Sale history for 21670 Shadyspring Rd

Tax history for 21670 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 21670 Shadyspring Rd

More real estate resources