Google street view image for 21673 Castleton St, Cupertino, CA 95014

Off market jun 2015 for $1.9M

$3,608,490

Est. refi paymentEst. refi $12,232/mo

•

2,119

sq ft

21673 Castleton St, Cupertino, CA 95014

About this home

21673 Castleton St is a 2,119 square foot house on a 7,455 square foot lot with 4 bedrooms and 3 bathrooms. - it last sold on June 12, 2015 for $1,950,000. Based on Redfin's Cupertino data, we estimate the home's value is $3,608,490.

Single-familyProperty Type

1966Year Built

7,455 sq ftLot Size

$1,703Est. Price/Sq.Ft.

2 car garageParking

Source:Public Records

Redfin Estimate

$3,608,490

$1.7M since sold in June 2015$65K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 0.8% lower than the average sale price ($3.64M) of 5 comparable homes.

SOLD OCT 8, 2026
$3,530,000
A
4 beds3 baths2,119 sq ft
10936 Linda Vista Dr, Cupertino, CA 95014
SOLD AUG 18, 2026
$4,080,000
B
4 beds3 baths2,119 sq ft
11113 Wilkinson Ave, Cupertino, CA 95014
SOLD OCT 13, 2026
$3,270,000
C
4 beds2.5 baths1,787 sq ft
21446 Holly Oak Dr, Cupertino, CA 95014
SOLD JAN 12, 2026
$3,800,000
D
4 beds3 baths2,102 sq ft
11112 Wilkinson, Cupertino, CA 95014
Realty ONE Group Complete
SOLD JUN 15, 2026
$3,500,000
E
4 beds3 baths2,331 sq ft
1144 Elmsford Dr, Cupertino, CA 95014

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Earn from this home

Sell

$2,250,044

Est. take-home

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Refinance

Est. cash available

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Rent

$6,217/mo

Redfin rental estimate

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Market trends in 95014, CA

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

105.4%

+0.5% MoM

Median sale price

$2.8M

$11K MoM

Avg. days on market

13d

3 days MoM

Recently sold homes

1 MoM

New listings for sale

OPEN SAT, 1PM TO 4PM
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OPEN THU, 5PM TO 7PM
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HOT HOME
$2,988,000
4 beds2 baths1,876 sq ft
7522 Kingsbury Pl, Cupertino, CA 95014
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2 beds1 bath654 sq ft
10590 San Leandro Ave, Cupertino, CA 95014
$698,000
1 bed1 bath871 sq ft
20736 Celeste Cir, Cupertino, CA 95014
3D WALKTHROUGH
$3,990,000
5 beds5.5 baths3,132 sq ft
20387 Clay St, Cupertino, CA 95014
COMING SOON
$1,299,888
3 beds2 baths1,193 sq ft
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3D WALKTHROUGH
$1,448,800
3 beds2.5 baths1,551 sq ft
20276 Pinntage Pkwy, Cupertino, CA 95014
VIDEO TOUR
$3,088,000
3 beds2.5 baths2,460 sq ft
21905 Meadowview Ln, Cupertino, CA 95014
3D & VIDEO TOUR
$2,998,000
3 beds2 baths1,552 sq ft
10449 Colby Ave, Cupertino, CA 95014
See all

Provided by Redfin

Sale history for 21673 Castleton St

Year

Property tax

Land + Additions

Assessment*

2025

$28,295 (+2.8%)

$1,912,379 + $478,090

$2,390,469

2024

$27,522 (+0.8%)

$1,874,882 + $468,716

$2,343,598

2023

$27,301 (+1.0%)

$1,838,120 + $459,526

$2,297,646

2022

$27,021 (+1.0%)

$1,802,079 + $450,516

$2,252,595

2021

$26,745 (+1.2%)

$1,766,745 + $441,683

$2,208,428

2020

$26,421 (+2.4%)

$1,732,103 + $433,023

$2,165,126

2019

$25,790 (+2.7%)

$1,714,343 + $428,583

$2,142,926

2018

$25,100 (+0.6%)

$1,680,729 + $420,180

$2,100,909

2017

$24,948 (+4.3%)

$1,615,465 + $403,865

$2,019,330

2016

$23,910 (+1,145.3%)

$1,615,465 + $403,865

$2,019,330

2015

$1,920 (+8.2%)

$1,583,790 + $395,947

$1,979,737

2014

$1,775 (+4.6%)

$23,914 + $81,971

$105,885

2012

$1,697 (+3.2%)

$23,806 + $81,601

$105,407

2011

$1,644 (+3.0%)

$23,340 + $80,001

$103,341

2010

$1,597

$22,883 + $78,433

$101,316

2009

$1,596 (+5.9%)

$22,712 + $77,847

$100,559

2008

$1,507

$22,320 + $76,502

$98,822

Tax history for 21673 Castleton St

Year

Property tax

Land + Additions

Assessment*

2025

$28,295 (+2.8%)

$1,912,379 + $478,090

$2,390,469

2024

$27,522 (+0.8%)

$1,874,882 + $468,716

$2,343,598

2023

$27,301 (+1.0%)

$1,838,120 + $459,526

$2,297,646

2022

$27,021 (+1.0%)

$1,802,079 + $450,516

$2,252,595

2021

$26,745 (+1.2%)

$1,766,745 + $441,683

$2,208,428

2020

$26,421 (+2.4%)

$1,732,103 + $433,023

$2,165,126

2019

$25,790 (+2.7%)

$1,714,343 + $428,583

$2,142,926

2018

$25,100 (+0.6%)

$1,680,729 + $420,180

$2,100,909

2017

$24,948 (+4.3%)

$1,615,465 + $403,865

$2,019,330

2016

$23,910 (+1,145.3%)

$1,615,465 + $403,865

$2,019,330

2015

$1,920 (+8.2%)

$1,583,790 + $395,947

$1,979,737

2014

$1,775 (+4.6%)

$23,914 + $81,971

$105,885

2012

$1,697 (+3.2%)

$23,806 + $81,601

$105,407

2011

$1,644 (+3.0%)

$23,340 + $80,001

$103,341

2010

$1,597

$22,883 + $78,433

$101,316

2009

$1,596 (+5.9%)

$22,712 + $77,847

$100,559

2008

$1,507

$22,320 + $76,502

$98,822

*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

R1-7.5

Single-Family Residential Zone

Single-family residence districts are intended to create, preserve and enhance areas suitable for detached dwellings in order to: Enhance the identity of residential neighborhoods; Ensure provision of light, air and a reasonable level of privacy to individual residential parcels; Ensure a reasonable level of compatibility in scale of structures within residential neighborhoods; and Reinforce the predominantly low-intensity setting in the community.

Permitted uses

Include but are not limited to:

Housing-Single unit
Housing-Senior
Housing-Other
Infrastructure

Nov 22, 2024 • Final

Electrical panel upgrade - online

Upgrade the electrical service panel at the same location.

Electrical

Jul 19, 2019 • Final

Residential mechanical

Install a new condenser and coil with a 220-volt electrical hookup.

HVAC

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

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Room Information
# of Rooms: 9

Exterior

Exterior Information
Physical Condition: Average
Building Style Type: L-Shape
Construction Type: Wood
Building Construction Quality: Good
Roof Framing Type: Wood

Property Information
Subdivision Name: MONTEBELLO
Living Sq. Ft: 2,119
Ground Floor Sq. Ft: 1,339
Building Sq. Ft: 2,119
# of Stories: 2
Legal Description: TRACT 4104 MONTEBELLO BOOK 220 PAGE 12 PAGE 13 LOT 98

Parking & Garage Information
Garage/Parking Sq. Ft: 451

Lot Information
# of Buildings: 1
Land Sq. Ft: 7,455
Legal Lot Number: 98
Municipality Name: CUPERTINO CITY
Acres: 0.1711
Depth Footage: 105
Front Footage: 71
Zoning Code: R1
County Use Description: RESID SINGLE FAMILY

Financial

Assessor Information
Assessment Year: 2026
Tax Area: CUPERTINO CITY

Public facts

Beds: 4
Baths: 3.0
Sq. Ft.: 2,119
Stories: 2.0
Parking Spaces: —
Basement: No
Accessible: No
Lot Size: 7,455 square feet
Style: Single Family Residential
Year Built: 1966
Year Renovated: 1966
County: Santa Clara County
APN: 35618065
HOA Dues: —
Garage: No
Features: —

Home facts updated by owner on May 17, 2020

Around this home

Schools

Abraham Lincoln Elementary School

Public K-5 • Assigned • 0.5mi

9/10

John F. Kennedy Middle School

Public 6-8 • Assigned • 0.3mi

9/10

Monta Vista High School

Public 9-12 • Assigned • 0.5mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

The Cupertino housing market remains competitive. Over the past three months, homes have received an average of four offers and sold in about 10 days. The median home sale price reached $3.2 million, representing a 15.3% increase year over year.
2 weeks ago • Cupertino
Fifi Li
Redfin Premier agent
124 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

8 days above 95° expected this year, 17 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

8/10 Air Factor

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

Provided by First Street

Historical weather

Cupertino, CA • 95014

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 10.8 hours in June and 4.9 hours in December, placing it above the U.S. average for solar exposure.

10.8 hrs

4.9 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$3.43M – $4.15M

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New listings for sale in 95014

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3D WALKTHROUGH

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COMING SOON

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3D WALKTHROUGH

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Home values near 21673 Castleton St

Data from public records.

Address	Redfin Estimate
21623 Castleton Street, Cupertino, CA 3 Beds \| 2 Baths \| 1571 Sq. Ft.	$3,058,746
21713 Castleton Street, Cupertino, CA 4 Beds \| 3 Baths \| 2055 Sq. Ft.	$3,412,291

Address	Redfin Estimate
21683 Castleton Street, Cupertino, CA 5 Beds \| 3 Baths \| 2300 Sq. Ft.	$3,733,258
21643 Castleton Street, Cupertino, CA 5 Beds \| 4.5 Baths \| 2895 Sq. Ft.	$3,631,866

Address	Redfin Estimate
21723 Castleton Street, Cupertino, CA 4 Beds \| 3 Baths \| 2119 Sq. Ft.	$3,643,091
21663 Castleton Street, Cupertino, CA 5 Beds \| 3 Baths \| 2822 Sq. Ft.	$4,159,542

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 95014, CA

Sale history for 21673 Castleton St

Tax history for 21673 Castleton St

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 95014

Home values near 21673 Castleton St

More real estate resources