Off market nov 2015 for $725K

$1,145,674

Est. refi paymentEst. refi $4,566/mo

•

2,118

sq ft

21871 Ada St, Castro Valley, CA 94546

About this home

Single-familyProperty Type

1948Year Built

6,300 sq ftLot Size

2 car garageParking

Listed by Michael Swift •DRE #01135478 • Keller Williams Tri-Valley

Contact: 510-414-8224

Bought with Michael Swift •DRE #01135478 • Keller Williams Tri-Valley

Bought with Kenneth Quimby •DRE #01959381 • Keller Williams Tri-Valley

Redfin checked: 2 minutes ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40719059

Redfin Estimate

$1,145,674

$421K since sold in November 2015$2,000 since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 11.7% higher than the average sale price ($1.03M) of 6 comparable homes.

SOLD SEP 1, 2026
$870,000
A
4 beds3 baths1,736 sq ft
2418 Kelly St, Hayward, CA 94541
EXIT Realty Consultants
SOLD JUL 27, 2026
$1,410,000
B
4 beds3 baths1,888 sq ft
4253 David St, Castro Valley, CA 94546
SOLD JUL 9, 2026
$984,777
C
3 beds2 baths1,650 sq ft
21451 Rizzo Ave, Castro Valley, CA 94546
SOLD SEP 11, 2026
$1,170,000
D
4 beds3 baths2,474 sq ft
21714 Shadyspring Rd, Castro Valley, CA 94546
SOLD JUL 28, 2026
$844,500
E
3 beds2 baths1,586 sq ft
2305 Star Ave, Castro Valley, CA 94546
SOLD OCT 2, 2026
$875,000
F
3 beds2 baths1,560 sq ft
22590 Norwood Dr, Castro Valley, CA 94541

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Earn from this home

Sell

$643,526

Est. take-home

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Refinance

Est. cash available

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Rent

$4,337/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

COMING SOON
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NEW 10 HRS AGO
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OPEN SAT, 1PM TO 3PM
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1 bed1 bath528 sq ft
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Vista Sotheby's International Realty
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COMING SOON
$1,098,000
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$975,000
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See all

Provided by Redfin

Sale history for 21871 Ada St

Year

Property tax

Land + Additions

Assessment*

2025

$11,525 (+2.5%)

$273,535 + $638,249

$911,784

2024

$11,245 (+1.8%)

$268,172 + $625,736

$893,908

2023

$11,047 (+2.2%)

$262,915 + $613,468

$876,383

2022

$10,805 (+1.0%)

$252,707 + $589,649

$842,356

2021

$10,697 (+0.5%)

$252,707 + $589,649

$842,356

2020

$10,646 (+3.0%)

$247,753 + $578,090

$825,843

2019

$10,336 (+6.6%)

$245,213 + $572,164

$817,377

2018

$9,696 (+2.5%)

$230,811 + $538,559

$769,370

2017

$9,458 (+5.8%)

$221,850 + $517,650

$739,500

2016

$8,936 (+103.0%)

$221,850 + $517,650

$739,500

2015

$4,402 (+5.7%)

$217,500 + $507,500

$725,000

2014

$4,165 (+1.3%)

$97,196 + $226,791

$323,987

2013

$4,110 (+2.2%)

$97,196 + $226,791

$323,987

2012

$4,024 (+1.9%)

$96,757 + $225,766

$322,523

2011

$3,949 (+135.4%)

$94,860 + $221,340

$316,200

2010

$1,678 (−0.6%)

$93,000 + $217,000

$310,000

2009

$1,687 (+6.0%)

$27,540 + $86,367

$113,907

2008

$1,592

$27,605 + $86,573

$114,178

Tax history for 21871 Ada St

Year

Property tax

Land + Additions

Assessment*

2025

$11,525 (+2.5%)

$273,535 + $638,249

$911,784

2024

$11,245 (+1.8%)

$268,172 + $625,736

$893,908

2023

$11,047 (+2.2%)

$262,915 + $613,468

$876,383

2022

$10,805 (+1.0%)

$252,707 + $589,649

$842,356

2021

$10,697 (+0.5%)

$252,707 + $589,649

$842,356

2020

$10,646 (+3.0%)

$247,753 + $578,090

$825,843

2019

$10,336 (+6.6%)

$245,213 + $572,164

$817,377

2018

$9,696 (+2.5%)

$230,811 + $538,559

$769,370

2017

$9,458 (+5.8%)

$221,850 + $517,650

$739,500

2016

$8,936 (+103.0%)

$221,850 + $517,650

$739,500

2015

$4,402 (+5.7%)

$217,500 + $507,500

$725,000

2014

$4,165 (+1.3%)

$97,196 + $226,791

$323,987

2013

$4,110 (+2.2%)

$97,196 + $226,791

$323,987

2012

$4,024 (+1.9%)

$96,757 + $225,766

$322,523

2011

$3,949 (+135.4%)

$94,860 + $221,340

$316,200

2010

$1,678 (−0.6%)

$93,000 + $217,000

$310,000

2009

$1,687 (+6.0%)

$27,540 + $86,367

$113,907

2008

$1,592

$27,605 + $86,573

$114,178

*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

6,300

Year renovated

1958

Sq. Ft.

2,118

Year built

1948

Style

Single Family Residential

County

Alameda County

APN

415 009003300

Parking Spaces

Basement

Accessible

HOA Dues

—

Garage

Yes

Features

Views

Last updated by owner on Jun 19, 2019.

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, Int Access From Garage, Off Street, RV/Boat Parking, Side Yard Access, Workshop in Garage, Garage Door Opener

Interior

Virtual Tour

Bathroom Information
# of Bathrooms Total: 3
# of Bathrooms Full: 3
Other Bathrooms Included Features: Shower Over Tub, Solid Surface, Tile, Updated Baths
Primary Bathroom Included Features: Solid Surface, Stall Shower, Tile, Updated Baths

Interior Features
Interior Features: Counter - Solid Surface, Updated Kitchen
Appliances: Dishwasher, Gas Range, Microwave, Free-Standing Range, Refrigerator, Self Cleaning Oven, Gas Water Heater
Laundry Features: Gas Dryer Hookup, Hookups Only
Upper Level Features: 1 Bedroom, 1 Bath, Loft
Street Level Features: 3 Bedrooms, 2 Baths, Laundry Facility, Main Entry
Window Features: Double Pane Windows
Flooring: Laminate, Carpet

Room Information
Kitchen Features: Counter - Solid Surface,Dishwasher,Gas Range/Cooktop,Microwave,Range/Oven Free Standing,Refrigerator,Self-Cleaning Oven,Updated Kitchen
Rooms Total: 8
Room Type: Attic - Finished, Bonus Room, Media Room
Basement: Crawl Space

Exterior

Building Information
Construction Materials: Stucco
Building Area Total: 2,118
Foundation Details: Slab

Exterior Features
Patio And Porch Features: Patio
Exterior Features: Back Yard, Front Yard, Side Yard
Fencing: Fenced
Roof: Shingle

Property Information
Living Area: 2118
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1948

Lot Information
Lot Size Square Feet: 6300
Lot Size Area: 0.144628
Lot Size Units: Acres
Lot Size Acres: 0.144628
Lot Features: Corner Lot, Level, Premium Lot
Zoning: 1001

Utilities

Utility Information
Water Source: Public
Sewer: Public Sewer

Heating & Cooling
Has Heating
Heating: Forced Air
Cooling: Central Air

Location

School Information
High School District: Hayward (510) 784-2600

Public facts

Beds: 4
Baths: 2.0
Sq. Ft.: 2,118
Stories: 1.0
Parking Spaces: 2
Basement: No
Accessible: No
Lot Size: 6,300 square feet
Style: Single Family Residential
Year Built: 1948
Year Renovated: 1958
County: Alameda County
APN: 415 009003300
HOA Dues: —
Garage: Yes
Features: Views

Home facts updated by owner on Jun 19, 2019

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 • 1.2mi

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?
Hayward's fall market offers fantastic value for East Bay buyers. With median prices holding around $845K and homes averaging 20 days on market, you have breathing room to negotiate on older homes. Yet pristine, turnkey properties still move fast....
1 month ago • Hayward
Johnny Singh
Redfin Premier agent
150 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

$1.07M – $1.30M

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COMING SOON

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Home values near 21871 Ada St

Data from public records.

Address	Redfin Estimate
21723 Ada Street, Castro Valley, CA 2 Beds \| 1.5 Baths \| 1170 Sq. Ft.	$914,342
21925 Ada Street, Castro Valley, CA 2 Beds \| 1 Baths \| 906 Sq. Ft.	$810,379

Address	Redfin Estimate
21916 Ada Street, Castro Valley, CA 3 Beds \| 1 Baths \| 1028 Sq. Ft.	$743,016
21724 Ada Street, Castro Valley, CA 3 Beds \| 1 Baths \| 1028 Sq. Ft.	$811,635

Address	Redfin Estimate
21852 Ada Street, Castro Valley, CA 2 Beds \| 1 Baths \| 905 Sq. Ft.	$831,311
21735 Ada Street, Castro Valley, CA 3 Beds \| 1 Baths \| 1170 Sq. Ft.	$861,191

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2015. This data may not show owner updates. 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 21871 Ada St

Tax history for 21871 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 21871 Ada St

More real estate resources