OFF MARKET

Off Market Dec 2004 for $450K

$797,304

Est. refi paymentEst. refi $2,772/mo

•

834

sq ft

21488 Rizzo Ave, Castro Valley, CA 94546

About this home

Single-familyProperty Type

1941Year Built

4,761 sq ftLot Size

$956Est. Price/Sq.Ft.

1 car garageParking

Listed by Anton Korbas •DRE #01394096 • Korbas Realty

Bought with Paul Arendsee •DRE #01229662 • Tod Henry Real Estate

Redfin checked: a minute ago

•Source:bridgeMLS, Bay East AOR, or Contra Costa AOR #40045115

Redfin Estimate

$797,304

$347K since sold in December 2004$16K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 5.8% higher than the average sale price ($754K) of 6 comparable homes.

SOLD AUG 7, 2026
$850,000
A
2 beds1 bath1,018 sq ft
2107 Lessley Ave, Castro Valley, CA 94546
SOLD APR 27, 2026
$768,000
B
3 beds1 bath871 sq ft
2226 Vegas Ave, Castro Valley, CA 94546
SOLD JUN 5, 2026
$738,000
C
2 beds1 bath825 sq ft
21146 Elm St, Castro Valley, CA 94546
SOLD OCT 23, 2025
$725,000
D
2 beds1 bath1,048 sq ft
21284 Tyee St, Castro Valley, CA 94546
SOLD OCT 23, 2025
$695,000
E
2 beds1 bath1,018 sq ft
22134 Orange Ave, Castro Valley, CA 94546
SOLD OCT 15, 2025
$745,000
F
2 beds1 bath876 sq ft
2234 Lobert St, Castro Valley, CA 94546

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Earn from this home

Sell

$611,004

Est. take-home

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Refinance

Est. cash available

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Rent

$2,789/mo

Redfin rental estimate

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Market trends in 94546, CA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

103.9%

1.3% MoM

Median sale price

$1.1M

$70K MoM

Avg. days on market

14d

1 days MoM

Recently sold homes

3 MoM

New listings for sale

$699,000
2 beds1 bath1,079 sq ft
18473 Apricot Way, Castro Valley, CA 94546
OPEN SUN, 1PM TO 3PM
$979,000
4 beds2.5 baths1,980 sq ft
4101 Toddika Ln, Castro Valley, CA 94546
OPEN WED, 10:30AM TO 12PM
$999,000
4 beds2 baths1,680 sq ft
20275 Stanton Ave, Castro Valley, CA 94546
OPEN SAT, 1:30PM TO 4PM
$799,000
2 beds2 baths1,122 sq ft
1540 Crescent Ave, Castro Valley, CA 94546
$1,175,000
3 beds2 baths1,440 sq ft
19453 Vaughn Ave, Castro Valley, CA 94546
Pacific Home Brokers
$695,000
2 beds1.5 baths1,207 sq ft
20279 Forest Ave, Castro Valley, CA 94546
(415) 510-8600
$870,000
3 beds1 bath1,080 sq ft
2976 Sydney Way, Castro Valley, CA 94546
COMING SOON
$1,550,000
3 beds1.5 baths1,851 sq ft
4618 Ewing Rd, Castro Valley, CA 94546
OPEN SAT, 1PM TO 4PM
$699,999
3 beds1 bath1,036 sq ft
19117 Parsons Ave, Castro Valley, CA 94546
OPEN SUN, 2PM TO 4PM
$549,950
3 beds2 baths1,354 sq ft
21239 Gary Dr Unit 202E, Hayward, CA 94546
See all

Provided by Redfin

Sale history for 21488 Rizzo Ave

Date

Event

Price

bridgeMLS, Bay East AOR, or Contra Costa AOR #40045115

Dec 8, 2004

Sold

$450,000

$540/sq ft

Oct 28, 2004

Listing Removed

—

Oct 8, 2004

Listed

$434,995

$522/sq ft

bridgeMLS, Bay East AOR, or Contra Costa AOR #40010311

Jun 8, 2004

Sold

$375,000

$450/sq ft

May 3, 2004

Listing Removed

—

Apr 23, 2004

Listed

$375,000

$450/sq ft

Year

Property tax

Land + Additions

Assessment*

2025

$8,356 (+2.5%)

$188,160 + $439,040

$627,200

2024

$8,149 (+1.9%)

$188,160 + $439,040

$627,200

2023

$7,998 (+2.3%)

$184,472 + $430,434

$614,906

2022

$7,817 (+1.1%)

$177,310 + $413,724

$591,034

2021

$7,733 (+1.3%)

$177,310 + $413,724

$591,034

2020

$7,633 (−0.7%)

$173,834 + $405,612

$579,446

2019

$7,689 (+6.5%)

$172,052 + $401,454

$573,506

2018

$7,220 (+13.4%)

$168,679 + $393,586

$562,265

2017

$6,367 (+11.4%)

$144,900 + $338,100

$483,000

2016

$5,718 (+11.5%)

$144,900 + $338,100

$483,000

2015

$5,128 (+11.7%)

$134,400 + $313,600

$448,000

2014

$4,589 (+19.4%)

$111,000 + $259,000

$370,000

2013

$3,844 (+9.8%)

$111,000 + $259,000

$370,000

2012

$3,500 (+0.4%)

$91,500 + $213,500

$305,000

2011

$3,485 (−3.1%)

$82,500 + $192,500

$275,000

2010

$3,596 (−5.6%)

$82,500 + $192,500

$275,000

2009

$3,810 (−28.1%)

$87,000 + $203,000

$290,000

2008

$5,302

$91,800 + $214,200

$306,000

Tax history for 21488 Rizzo Ave

Year

Property tax

Land + Additions

Assessment*

2025

$8,356 (+2.5%)

$188,160 + $439,040

$627,200

2024

$8,149 (+1.9%)

$188,160 + $439,040

$627,200

2023

$7,998 (+2.3%)

$184,472 + $430,434

$614,906

2022

$7,817 (+1.1%)

$177,310 + $413,724

$591,034

2021

$7,733 (+1.3%)

$177,310 + $413,724

$591,034

2020

$7,633 (−0.7%)

$173,834 + $405,612

$579,446

2019

$7,689 (+6.5%)

$172,052 + $401,454

$573,506

2018

$7,220 (+13.4%)

$168,679 + $393,586

$562,265

2017

$6,367 (+11.4%)

$144,900 + $338,100

$483,000

2016

$5,718 (+11.5%)

$144,900 + $338,100

$483,000

2015

$5,128 (+11.7%)

$134,400 + $313,600

$448,000

2014

$4,589 (+19.4%)

$111,000 + $259,000

$370,000

2013

$3,844 (+9.8%)

$111,000 + $259,000

$370,000

2012

$3,500 (+0.4%)

$91,500 + $213,500

$305,000

2011

$3,485 (−3.1%)

$82,500 + $192,500

$275,000

2010

$3,596 (−5.6%)

$82,500 + $192,500

$275,000

2009

$3,810 (−28.1%)

$87,000 + $203,000

$290,000

2008

$5,302

$91,800 + $214,200

$306,000

*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
Permits

Beds

Baths

Stories

Lot width

—

Lot depth

—

Lot size

4,761 Sq. Ft.

Year renovated

1941

Sq. Ft.

834

Year built

1941

Style

Single Family Residential

County

Alameda County

APN

415 006002900

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 27, 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

May 3, 2021 • Final

Residential hvac – replace furnace only

Replace a furnace in the same location and install a ductless heat pump system.

Heat pump

HVAC

Aug 17, 2018 • Final

Building

Install replacement windows with no change in size. Reduce the size of a bedroom window while maintaining egress requirements.

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

Parking

Parking Information
Has Attached Garage
Garage Spaces: 1
Covered Spaces: 1
Parking Features: Attached, Int Access From Garage, RV/Boat Parking, Side Yard Access, Garage Door Opener

Interior

Bathroom Information
# of Bathrooms Total: 1
# of Bathrooms Full: 1
Other Bathrooms Included Features: Shower Over Tub, Tile, Tub, Updated Baths

Interior Features
Interior Features: Storage, Laminate Counters, Updated Kitchen
Appliances: Dishwasher, Electric Range, Disposal, Microwave, Free-Standing Range, Refrigerator, Self Cleaning Oven, Dryer, Washer, Gas Water Heater
Laundry Features: Dryer, In Garage, Washer
Street Level Features: 2 Bedrooms, 1 Bath, Primary Bedrm Suite - 1, Laundry Facility, Main Entry
Window Features: Window Coverings
Fireplaces Total: 1
Has Fireplace
Flooring: Hardwood, Linoleum, Tile

Room Information
Kitchen Features: 220 Volt Outlet,Counter - Laminate,Dishwasher,Electric Range/Cooktop,Garbage Disposal,Microwave,Range/Oven Free Standing,Refrigerator,Self-Cleaning Oven,Updated Kitchen
Rooms Total: 5
Fireplace Features: Brick, Living Room, Wood Burning
Basement: Crawl Space

Exterior

Building Information
Construction Materials: Stucco
Building Area Total: 834

Exterior Features
Patio And Porch Features: Covered, Enclosed
Exterior Features: Back Yard, Front Yard, Side Yard, Storage
Door Features: Mirrored Closet Door(s)
Fencing: Fenced
Roof: Shingle

Property Information
Living Area: 834
Living Area Units: Square Feet
Property Type: Residential
Property Sub Type: Single Family Residence
Year Built: 1941

Lot Information
Other Structures: Shed(s)
Lot Size Square Feet: 4761
Lot Size Area: 0.11
Lot Size Units: Acres
Lot Size Acres: 0.11
Lot Features: Corner Lot, Level, Regular
Zoning: 1001

Utilities

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

Heating & Cooling
Has Heating
Heating: Wall Furnace
Cooling: Ceiling Fan(s)

Location

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

Public facts

Beds: 2
Baths: 1.0
Sq. Ft.: 834
Stories: 1.0
Lot Size: 4,761 square feet
Style: Single Family Residential
Year Built: 1941
Year Renovated: 1941
County: Alameda County
APN: 415 006002900

Home facts updated by county records on Jul 27, 2026

Around this home

Schools

Fairview Elementary School

Public K-6 • Assigned • 1.6mi

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 is moving at a brisk pace this summer! Median prices are holding steady around $1.2M, but well-priced, turnkey homes are flying off the market in under 15 days, often over asking. Inventory is moving fast, so buyers must come prepared...
8 hours 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
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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

$758,000 – $917,000

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Home values near 21488 Rizzo Ave

Data from public records.

Address	Redfin Estimate
21470 Rizzo Avenue, Castro Valley, CA 3 Beds \| 2 Baths \| 1050 Sq. Ft.	$850,381
21475 Rizzo Avenue, Castro Valley, CA 2 Beds \| 1 Baths \| 1146 Sq. Ft.	$1,007,460

Address	Redfin Estimate
21446 Rizzo Avenue, Castro Valley, CA 3 Beds \| 2 Baths \| 1552 Sq. Ft.	$933,958
21487 Rizzo Avenue, Castro Valley, CA 3 Beds \| 1 Baths \| 1118 Sq. Ft.	$793,904

Address	Redfin Estimate
21452 Rizzo Avenue, Castro Valley, CA 3 Beds \| 1 Baths \| 1104 Sq. Ft.	$936,144
21469 Rizzo Avenue, Castro Valley, CA 2 Beds \| 1 Baths \| 834 Sq. Ft.	$800,624

Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 2004. 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 21488 Rizzo Ave

Tax history for 21488 Rizzo Ave

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 21488 Rizzo Ave

More real estate resources