Google street view image for 21 Rialto Dr, Clayton, CA 94517

Off market jul 2013 for $621K

$1,092,481

Est. refi paymentEst. refi $1,631/mo

•

3 ba

•

2,324

sq ft

21 Rialto Dr, Clayton, CA 94517

About this home

21 Rialto Dr is a 2,324 square foot house on a 9,460 square foot lot with 3 bedrooms and 3 bathrooms. - it last sold on July 12, 2013 for $621,000. Based on Redfin's Clayton data, we estimate the home's value is $1,092,481.

Single-familyProperty Type

1976Year Built

9,460 sq ftLot Size

$470Est. Price/Sq.Ft.

2 car garageParking

Source:Public Records

Redfin Estimate

$1,092,481

$471K since sold in July 2013$38K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 1.1% lower than the average sale price ($1.10M) of 6 comparable homes.

SOLD AUG 31, 2026
$995,000
A
4 beds2.5 baths2,420 sq ft
8 Mirango Ct, Clayton, CA 94517
Roots Real Estate Group
SOLD JUN 18, 2026
$1,040,000
B
4 beds2.5 baths2,368 sq ft
55 Regency Dr, Clayton, CA 94517
SOLD OCT 2, 2026
$1,168,000
C
4 beds2.5 baths2,032 sq ft
726 Bloching Cir, Clayton, CA 94517
SOLD APR 8, 2026
$1,085,000
D
4 beds2.5 baths2,324 sq ft
15 El Portal Ct, Clayton, CA 94517
SOLD SEP 11, 2026
$1,175,000
E
4 beds2.5 baths2,011 sq ft
911 Berendsen Ct, Clayton, CA 94517
SOLD OCT 15, 2026
$1,167,000
F
4 beds2.5 baths2,010 sq ft
608 W Myrick Ct, Clayton, CA 94517

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Earn from this home

Sell

$689,126

Est. take-home

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Refinance

Est. cash available

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Rent

$4,514/mo

Redfin rental estimate

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Market trends in 94517, CA

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

100.7%

0.4% MoM

Median sale price

$1.1M

$3K MoM

Avg. days on market

21d

10 days MoM

Recently sold homes

4 MoM

New listings for sale

$1,499,000
4 beds3 baths3,016 sq ft
24 Promontory Pl, Clayton, CA 94517
$1,550,000
5 beds3 baths2,691 sq ft
109 Mt Trinity Ct, Clayton, CA 94517
$1,175,000
5 beds3.5 baths2,260 sq ft
68 Nottingham Pl, Clayton, CA 94517
OPEN TUE, 10:30AM TO 12:30PM
$849,000
3 beds2 baths1,352 sq ft
1377 El Camino Dr, Clayton, CA 94517
$815,000
3 beds2.5 baths1,939 sq ft
1766 Indian Wls, Clayton, CA 94517
See all

Provided by Redfin

Sale history for 21 Rialto Dr

Year

Property tax

Land + Additions

Assessment*

2026

$9,917 (+2.5%)

$450,131 + $326,341

$776,472

2025

$9,677 (+2.5%)

$450,131 + $326,341

$776,472

2024

$9,437 (+1.9%)

$441,305 + $319,943

$761,248

2023

$9,261 (+1.3%)

$432,652 + $313,670

$746,322

2022

$9,138 (+2.5%)

$424,169 + $307,520

$731,689

2021

$8,917 (−0.1%)

$415,852 + $301,491

$717,343

2020

$8,929 (+1.2%)

$407,699 + $295,580

$703,279

2019

$8,823 (+3.9%)

$403,519 + $292,550

$696,069

2018

$8,495 (+3.3%)

$395,607 + $286,814

$682,421

2017

$8,220 (+2.7%)

$380,246 + $275,678

$655,924

2016

$8,006 (+1.0%)

$380,246 + $275,678

$655,924

2015

$7,925 (+2.6%)

$372,791 + $270,273

$643,064

2014

$7,721 (+61.4%)

$360,000 + $261,000

$621,000

2013

$4,783 (+2.5%)

$360,000 + $261,000

$621,000

2012

$4,668 (+3.3%)

$128,152 + $242,826

$370,978

2011

$4,520 (+1.4%)

$125,640 + $238,065

$363,705

2010

$4,460 (+0.4%)

$123,177 + $233,398

$356,575

2009

$4,443 (+2.6%)

$122,257 + $231,654

$353,911

2008

$4,328

$122,548 + $232,205

$354,753

Tax history for 21 Rialto Dr

Year

Property tax

Land + Additions

Assessment*

2026

$9,917 (+2.5%)

$450,131 + $326,341

$776,472

2025

$9,677 (+2.5%)

$450,131 + $326,341

$776,472

2024

$9,437 (+1.9%)

$441,305 + $319,943

$761,248

2023

$9,261 (+1.3%)

$432,652 + $313,670

$746,322

2022

$9,138 (+2.5%)

$424,169 + $307,520

$731,689

2021

$8,917 (−0.1%)

$415,852 + $301,491

$717,343

2020

$8,929 (+1.2%)

$407,699 + $295,580

$703,279

2019

$8,823 (+3.9%)

$403,519 + $292,550

$696,069

2018

$8,495 (+3.3%)

$395,607 + $286,814

$682,421

2017

$8,220 (+2.7%)

$380,246 + $275,678

$655,924

2016

$8,006 (+1.0%)

$380,246 + $275,678

$655,924

2015

$7,925 (+2.6%)

$372,791 + $270,273

$643,064

2014

$7,721 (+61.4%)

$360,000 + $261,000

$621,000

2013

$4,783 (+2.5%)

$360,000 + $261,000

$621,000

2012

$4,668 (+3.3%)

$128,152 + $242,826

$370,978

2011

$4,520 (+1.4%)

$125,640 + $238,065

$363,705

2010

$4,460 (+0.4%)

$123,177 + $233,398

$356,575

2009

$4,443 (+2.6%)

$122,257 + $231,654

$353,911

2008

$4,328

$122,548 + $232,205

$354,753

*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

Planned Development District

The major purposes of the Planned Development District are: To implement the objectives of the General Plan; To conserve outstanding natural and archeological features; To provide more private and public open space; To encourage building variety and innovative approaches in environmental design. The Planned Development District permits, for example, mixed land uses, varied setbacks and building heights and diverse lot sizes; To promote economy and efficiency through shared facilities and services.

Permitted uses

Include but are not limited to:

Housing-Single unit

Nov 18, 2014 • Final

Building - residential solar photovoltaic

Install a roof-mounted solar photovoltaic system.

Electrical

Solar

Aug 9, 2004 • Final

Building - residential re-roof

Tear off the existing wood shake roof and install OSB plywood and lightweight concrete tile. The new roof will be a Class A system.

Roofing

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

Heating & Cooling
Heating Type: Forced Air

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Room Information
# of Rooms: 10

Exterior

Exterior Information
Building Style Type: Ranch
Construction Type: Frame
Building Construction Quality: Good
Exterior Wall: Stucco

Pool Information
Has Pool

Property Information
Subdivision Name: SUBDIVISION 4643
Living Sq. Ft: 2,324
Ground Floor Sq. Ft: 1,422
Building Sq. Ft: 2,837
# of Stories: 2
Legal Description: T04643 L0010 B EX MR

Parking & Garage Information
# of Parking Spaces: 2
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 513
Garage / Carport Type: Attached

Lot Information
# of Buildings: 1
Land Sq. Ft: 9,460
Legal Lot Number: 10
Acres: 0.2172
Depth Footage: 86
Front Footage: 110
County Use Description: SINGLE FAMILY

Utility Information
Sewer Type: Public
Water Service Type: Public

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 3
Baths: 3.0
Sq. Ft.: 2,324
Stories: 2.0
Lot Size: 9,460 square feet
Style: Single Family Residential
Year Built: 1976
Year Renovated: 1985
County: Contra Costa County
APN: 1193520051

Home facts updated by county records on Oct 30, 2026

Around this home

Schools

K - 12
Preschool & daycare

Mt. Diablo Elementary School

Public K-5 • Assigned • 1.6mi

9/10

Diablo View Middle School

Public 6-8 • Assigned • 0.7mi

9/10

Northgate High School

Public 9-12 • Assigned • 4.8mi

9/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

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

8/10 Fire Factor

30% chance of being in a wildfire in next 30 years

4/10 Heat Factor

10 days above 93° expected this year, 19 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

9/10 Air Factor

17 unhealthy days expected this year, 18 days in 30 years

Provided by First Street

Historical weather

Clayton, CA • 94517

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 11.8 hours in June and 4.8 hours in December, placing it above the U.S. average for solar exposure.

11.8 hrs

4.8 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.04M – $1.26M

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Nearby similar homes

$1,499,000

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24 Promontory Pl, Clayton, CA 94517

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3 beds2 baths1,777 sq ft

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5524 Maine Dr, Concord, CA 94521

7,000 sq ft lot • 2 garage spots • Built 1964

Foundation Real Estate

New listings for sale in 94517

$1,499,000

4 beds3 baths3,016 sq ft

24 Promontory Pl, Clayton, CA 94517

Expansive decking • Mature landscaping • Colorful gardens

$1,550,000

5 beds3 baths2,691 sq ft

109 Mt Trinity Ct, Clayton, CA 94517

Backs to open space • Unobstructed views • Pool

$1,175,000

5 beds3.5 baths2,260 sq ft

68 Nottingham Pl, Clayton, CA 94517

Updated kitchen • Owned solar • Rv parking

OPEN TUE, 10:30AM TO 12:30PM

$849,000

3 beds2 baths1,352 sq ft

1377 El Camino Dr, Clayton, CA 94517

Expansive backyard • Remodeled kitchen • Large patio

$815,000

3 beds2.5 baths1,939 sq ft

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Oakhurst golf course • Extensive deck • Local amenities

Home values near 21 Rialto Dr

Data from public records.

Address	Redfin Estimate
2 Rialto Drive, Clayton, CA 3 Beds \| 2 Baths \| 1648 Sq. Ft.	$1,123,094
14 Rialto Drive, Clayton, CA 3 Beds \| 3 Baths \| 2324 Sq. Ft.	$1,091,869
20 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2391 Sq. Ft.	$1,065,636
33 Rialto Drive, Clayton, CA 4 Beds \| 2 Baths \| 1895 Sq. Ft.	$1,027,999
98 Regency Drive, Clayton, CA 3 Beds \| 3 Baths \| 1781 Sq. Ft.	$1,066,565
85 Regency Drive, Clayton, CA 4 Beds \| 3 Baths \| 2324 Sq. Ft.	$1,041,580
79 Regency Drive, Clayton, CA 4 Beds \| 3 Baths \| 2324 Sq. Ft.	$1,062,418

Address	Redfin Estimate
27 Rialto Drive, Clayton, CA 5 Beds \| 2.5 Baths \| 2324 Sq. Ft.	$1,140,734
8 Rialto Drive, Clayton, CA 4 Beds \| 2.5 Baths \| 2032 Sq. Ft.	$1,252,971
43 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2324 Sq. Ft.	$1,058,302
32 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2032 Sq. Ft.	$1,046,932
97 Regency Drive, Clayton, CA 4 Beds \| 2 Baths \| 1895 Sq. Ft.	$1,053,650
91 Regency Drive, Clayton, CA 4 Beds \| 2.5 Baths \| 2032 Sq. Ft.	$1,156,143
92 Regency Drive, Clayton, CA 4 Beds \| 3 Baths \| 2565 Sq. Ft.	$1,121,783

Address	Redfin Estimate
39 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2032 Sq. Ft.	$1,041,622
38 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2032 Sq. Ft.	$1,026,387
26 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2010 Sq. Ft.	$806,061
44 Rialto Drive, Clayton, CA 4 Beds \| 3 Baths \| 2324 Sq. Ft.	$1,048,310
110 Regency Drive, Clayton, CA 5 Beds \| 4 Baths \| 2406 Sq. Ft.	$1,154,736
104 Regency Drive, Clayton, CA 4 Beds \| 3 Baths \| 2324 Sq. Ft.	$1,084,209
10 Seminary Ridge Place, Clayton, CA 5 Beds \| 4 Baths \| 3691 Sq. Ft.	$1,595,605

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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 94517, CA

Sale history for 21 Rialto Dr

Tax history for 21 Rialto Dr

Zoning and permits

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 94517

Home values near 21 Rialto Dr

More real estate resources