Off market aug 2010 for $288K

$912,415

Est. refi paymentEst. refi $2,586/mo

•

1,170

sq ft

21723 Ada St, Castro Valley, CA 94546

About this home

Single-familyProperty Type

1947Year Built

6,030 sq ftLot Size

2 car garageParking

Listed by Maureen Connor •DRE #01108687 • EQUITY CAPITAL REAL ESTATE

Bought with Donald Huey •DRE #01440404 • Coldwell Banker Realty

Redfin checked: 3 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40470698

Redfin Estimate

$912,415

$624K since sold in August 2010$8,000 since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 4.5% lower than the average sale price ($956K) of 6 comparable homes.

SOLD JUL 28, 2026
$844,500
A
3 beds2 baths1,586 sq ft
2305 Star Ave, Castro Valley, CA 94546
SOLD OCT 2, 2026
$875,000
B
3 beds2 baths1,560 sq ft
22590 Norwood Dr, Castro Valley, CA 94541
SOLD SEP 30, 2026
$1,060,000
C
3 beds2 baths1,591 sq ft
4315 Omega Ave, Castro Valley, CA 94546
SOLD SEP 24, 2026
$925,000
D
3 beds2 baths1,539 sq ft
20927 Nunes Ave, 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 20, 2026
$1,045,000
F
3 beds2 baths1,314 sq ft
3228 Kerr St, Castro Valley, CA 94546

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Sell

$725,152

Est. take-home

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Refinance

Est. cash available

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Rent

$3,348/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

103.4%

0.6% MoM

Median sale price

$1.1M

$823 MoM

Avg. days on market

18d

3 days MoM

Recently sold homes

7 MoM

New listings for sale

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OPEN SAT, 1PM TO 3PM
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Vista Sotheby's International Realty
COMING SOON
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COMING SOON
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HOT HOME
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See all

Provided by Redfin

Sale history for 21723 Ada St

Date

Event

Price

bridgeMLS, Bay East AOR, or Contra Costa AOR #40470698

Aug 25, 2010

Sold

$288,000

$246/sq ft

Jul 9, 2010

Pending

—

Jul 6, 2010

Price Changed

Jun 21, 2010

Price Changed

Jun 8, 2010

Listed

bridgeMLS, Bay East AOR, or Contra Costa AOR #11214281

Jan 7, 2004

Sold

$386,000

$330/sq ft

Nov 27, 2003

Listing Removed

—

Nov 26, 2003

Listed

Public Records

Jun 12, 1992

Sold

$200,000

$171/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$5,370 (+2.6%)

$112,900 + $263,434

$376,334

2024

$5,234 (+2.0%)

$110,687 + $258,269

$368,956

2023

$5,129 (+2.4%)

$108,517 + $253,207

$361,724

2022

$5,008 (+1.2%)

$104,304 + $243,377

$347,681

2021

$4,948 (+1.4%)

$104,304 + $243,377

$347,681

2020

$4,880 (−0.7%)

$102,259 + $238,605

$340,864

2019

$4,915 (+6.2%)

$101,211 + $236,160

$337,371

2018

$4,627 (+2.5%)

$99,227 + $231,531

$330,758

2017

$4,513 (+6.1%)

$95,376 + $222,544

$317,920

2016

$4,253 (+2.8%)

$95,376 + $222,544

$317,920

2015

$4,138 (+5.7%)

$93,506 + $218,181

$311,687

2014

$3,915 (+1.4%)

$90,298 + $210,696

$300,994

2013

$3,862 (+2.2%)

$90,298 + $210,696

$300,994

2012

$3,780 (−7.3%)

$89,890 + $209,744

$299,634

2011

$4,079 (+5.5%)

$88,128 + $205,632

$293,760

2010

$3,868 (−6.4%)

$86,400 + $201,600

$288,000

2009

$4,131 (−17.8%)

$92,400 + $215,600

$308,000

2008

$5,026

$98,400 + $229,600

$328,000

Tax history for 21723 Ada St

Year

Property tax

Land + Additions

Assessment*

2025

$5,370 (+2.6%)

$112,900 + $263,434

$376,334

2024

$5,234 (+2.0%)

$110,687 + $258,269

$368,956

2023

$5,129 (+2.4%)

$108,517 + $253,207

$361,724

2022

$5,008 (+1.2%)

$104,304 + $243,377

$347,681

2021

$4,948 (+1.4%)

$104,304 + $243,377

$347,681

2020

$4,880 (−0.7%)

$102,259 + $238,605

$340,864

2019

$4,915 (+6.2%)

$101,211 + $236,160

$337,371

2018

$4,627 (+2.5%)

$99,227 + $231,531

$330,758

2017

$4,513 (+6.1%)

$95,376 + $222,544

$317,920

2016

$4,253 (+2.8%)

$95,376 + $222,544

$317,920

2015

$4,138 (+5.7%)

$93,506 + $218,181

$311,687

2014

$3,915 (+1.4%)

$90,298 + $210,696

$300,994

2013

$3,862 (+2.2%)

$90,298 + $210,696

$300,994

2012

$3,780 (−7.3%)

$89,890 + $209,744

$299,634

2011

$4,079 (+5.5%)

$88,128 + $205,632

$293,760

2010

$3,868 (−6.4%)

$86,400 + $201,600

$288,000

2009

$4,131 (−17.8%)

$92,400 + $215,600

$308,000

2008

$5,026

$98,400 + $229,600

$328,000

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Public record

Public record
Zoning

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

6,030 Sq. Ft.

Year renovated

1947

Sq. Ft.

1,170

Year built

1947

Style

Single Family Residential

County

Alameda County

APN

415 009001100

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Sep 16, 2026.

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

Parking

Parking Information
Garage Spaces: 2
Covered Spaces: 2
Parking Features: Attached

Interior

Bathroom Information
# of Bathrooms Total: 2
# of Bathrooms Full: 1
# of Bathrooms Partial: 1

Interior Features
Interior Features: Den, Family Room
Laundry Features: Hookups Only
Street Level Features: 2 Bedrooms, 1.5 Baths, Main Entry
Fireplaces Total: 1
Has Fireplace
Flooring: Hardwood, Linoleum

Room Information
Kitchen Features: 220 Volt Outlet
Rooms Total: 5
Room Type: Den, Family Room
Fireplace Features: Living Room, Wood Burning

Exterior

Building Information
Construction Materials: Stucco
Building Area Total: 1,170

Exterior Features
Exterior Features: Back Yard, Front Yard
Fencing: Fenced
Roof: Shingle

Property Information
Living Area: 1170
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1947

Lot Information
Lot Size Square Feet: 6030
Lot Size Area: 0.13
Lot Size Units: Acres
Lot Size Acres: 0.13
Lot Features: Corner Lot, Level

Utilities

Utility Information
Water Source: Public
Electric: 220 Volts in Kitchen

Heating & Cooling
Has Heating
Heating: Floor Furnace
Cooling: No Air Conditioning

Location

School Information
High School District: Castro Valley (510) 537-3000

Public facts

Beds: 2
Baths: 2.0
Sq. Ft.: 1,170
Stories: 1.0
Lot Size: 6,030 square feet
Style: Single Family Residential
Year Built: 1947
Year Renovated: 1947
County: Alameda County
APN: 415 009001100

Home facts updated by county records on Sep 16, 2026

Around this home

Schools

Fairview Elementary School

Public K-6 • Assigned • 1.3mi

2/10

Bret Harte Middle School

Public 7-8 • Assigned • 1.3mi

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.
2 weeks ago • Castro Valley
Karan Kandel
Redfin agent
13 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
150 deals
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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

$867,000 – $1.05M

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Home values near 21723 Ada St

Data from public records.

Address	Redfin Estimate
21704 Ada St, Castro Valley, CA 2 Beds \| 1 Baths \| 1170 Sq. Ft.	$759,274
21735 Ada St, Castro Valley, CA 3 Beds \| 1 Baths \| 1170 Sq. Ft.	$856,592

Address	Redfin Estimate
21852 Ada St, Castro Valley, CA 2 Beds \| 1 Baths \| 905 Sq. Ft.	$831,311
21738 Ada St, Castro Valley, CA 3 Beds \| 1 Baths \| 1104 Sq. Ft.	$784,521

Address	Redfin Estimate
21724 Ada St, Castro Valley, CA 3 Beds \| 1 Baths \| 1028 Sq. Ft.	$811,943
21732 Ada St, Castro Valley, CA 2 Beds \| 1 Baths \| 905 Sq. Ft.	$835,035

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2010. This data may not match . Learn more.

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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 21723 Ada St

Tax history for 21723 Ada St

Public record

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 21723 Ada St

More real estate resources