OFF MARKET

Off market feb 2007 for $1.5M

$4,159,542

Est. refi paymentEst. refi $9,394/mo

•

2,822

sq ft

21663 CASTLETON St, Cupertino, CA 95014

About this home

Single-familyProperty Type

1972Year Built

6,969 sq ftLot Size

$1,474Est. Price/Sq.Ft.

2 car garageParking

Listed by Fred D. Boitano, Ii •DRE #00605685 • Compass

Contact: (408) 357-8605

Bought with Mark Gissler •DRE #00901229 • Intero Real Estate Services

Redfin checked: a minute ago

•Source:MLSListings #ML80651283

Redfin Estimate

$4,159,542

$2.6M since sold in February 2007$47K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 12.8% higher than the average sale price ($3.69M) of 4 comparable homes.

SOLD SEP 28, 2026
$3,869,000
A
5 beds3 baths2,412 sq ft
21570 Edward Way, Cupertino, CA 95014
SOLD OCT 8, 2026
$3,530,000
B
4 beds3 baths2,119 sq ft
10936 Linda Vista Dr, 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 AUG 18, 2026
$4,080,000
D
4 beds3 baths2,119 sq ft
11113 Wilkinson Ave, Cupertino, CA 95014

Claim this home to receive a free report every month with insights on the changing estimate.

Earn from this home

Sell

$3,335,166

Est. take-home

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Refinance

Est. cash available

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Rent

$7,762/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, 1:30PM TO 4:30PM
$3,888,000
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OPEN SAT, 1PM TO 4PM
$1,148,000
3 beds1.5 baths1,265 sq ft
21084 Red Fir Ct, Cupertino, CA 95014
OPEN SAT, 12PM TO 2PM
$2,998,000
3 beds2.5 baths1,956 sq ft
11657 Palm Spring Ct, Cupertino, CA 95014
OPEN SAT, 1PM TO 4PM
$2,988,000
4 beds2 baths1,876 sq ft
7522 Kingsbury Pl, Cupertino, CA 95014
$3,295,000
2 beds1 bath654 sq ft
10590 San Leandro Ave, Cupertino, CA 95014
OPEN SAT, 2PM TO 4PM
$698,000
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3D WALKTHROUGH
$3,990,000
5 beds5.5 baths3,132 sq ft
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COMING SOON
$1,299,888
3 beds2 baths1,193 sq ft
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OPEN SAT, 1PM TO 4PM
$1,448,800
3 beds2.5 baths1,551 sq ft
20276 Pinntage Pkwy, Cupertino, CA 95014
See all

Provided by Redfin

Sale history for 21663 CASTLETON St

Year

Property tax

Land + Additions

Assessment*

2025

$25,660 (+2.8%)

$1,613,930 + $538,427

$2,152,357

2024

$24,960 (+0.9%)

$1,582,285 + $527,870

$2,110,155

2023

$24,743 (+1.2%)

$1,551,260 + $517,520

$2,068,780

2022

$24,454 (+1.0%)

$1,520,844 + $507,373

$2,028,217

2021

$24,201 (+1.2%)

$1,491,024 + $497,425

$1,988,449

2020

$23,907 (+2.8%)

$1,461,789 + $487,672

$1,949,461

2019

$23,251 (+2.4%)

$1,446,801 + $482,672

$1,929,473

2018

$22,701 (+0.6%)

$1,418,433 + $473,208

$1,891,641

2017

$22,560 (+3.3%)

$1,363,354 + $454,834

$1,818,188

2016

$21,845 (+0.7%)

$1,363,354 + $454,834

$1,818,188

2015

$21,695 (+9.2%)

$1,336,622 + $445,916

$1,782,538

2014

$19,861 (+17.7%)

$1,214,700 + $405,300

$1,620,000

2012

$16,879 (+0.9%)

$1,124,000 + $375,000

$1,499,000

2011

$16,722 (+0.8%)

$1,025,800 + $342,200

$1,368,000

2010

$16,596 (−1.4%)

$1,041,000 + $347,000

$1,388,000

2009

$16,825 (−8.8%)

$1,038,900 + $346,600

$1,385,500

2008

$18,452

$1,204,620 + $401,880

$1,606,500

Tax history for 21663 CASTLETON St

Year

Property tax

Land + Additions

Assessment*

2025

$25,660 (+2.8%)

$1,613,930 + $538,427

$2,152,357

2024

$24,960 (+0.9%)

$1,582,285 + $527,870

$2,110,155

2023

$24,743 (+1.2%)

$1,551,260 + $517,520

$2,068,780

2022

$24,454 (+1.0%)

$1,520,844 + $507,373

$2,028,217

2021

$24,201 (+1.2%)

$1,491,024 + $497,425

$1,988,449

2020

$23,907 (+2.8%)

$1,461,789 + $487,672

$1,949,461

2019

$23,251 (+2.4%)

$1,446,801 + $482,672

$1,929,473

2018

$22,701 (+0.6%)

$1,418,433 + $473,208

$1,891,641

2017

$22,560 (+3.3%)

$1,363,354 + $454,834

$1,818,188

2016

$21,845 (+0.7%)

$1,363,354 + $454,834

$1,818,188

2015

$21,695 (+9.2%)

$1,336,622 + $445,916

$1,782,538

2014

$19,861 (+17.7%)

$1,214,700 + $405,300

$1,620,000

2012

$16,879 (+0.9%)

$1,124,000 + $375,000

$1,499,000

2011

$16,722 (+0.8%)

$1,025,800 + $342,200

$1,368,000

2010

$16,596 (−1.4%)

$1,041,000 + $347,000

$1,388,000

2009

$16,825 (−8.8%)

$1,038,900 + $346,600

$1,385,500

2008

$18,452

$1,204,620 + $401,880

$1,606,500

*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

7,400 Sq. Ft.

Year renovated

1966

Sq. Ft.

2,822

Year built

1966

Style

Single Family Residential

County

Santa Clara County

APN

35618064

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Aug 22, 2026.

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

Property details

Parking

Parking Information
Garage (Minimum): 2
Garage (Maximum): 2
Parking Description: Attached Garage, Gate/Door Opener, Off-Street Parking
Garage Spaces: 2

Interior

Virtual Tour

Bedroom Information
# of Bedrooms (Minimum): 5
# of Bedrooms (Maximum): 5
Bedrooms: Primary Suite/Retreat

Bathroom Information
# of Baths (Full): 3
# of Baths (Minimum): 3
# of Baths (Maximum): 3
Bathroom Description: Shower Over Tub, Tubs, 2+ Stall Shower

Room Information
Den/Study/Office, Formal Entry, Storage
Family Room Description: Separate Family Room
Dining Room Description: Formal Dining Room
Kitchen Description: Dishwasher, Cooktop, Garbage Disposal, 2+ Ovens, Oven (Self Cleaning), Oven (Built-In)

Interior Features
Laundry: In Laundry Room
Flooring: Hardwood (Partial), Carpet (Wall-to-Wall), Marble

Fireplace Information
Fireplace Description: In Family Room, Insert, Gas Log, Fireplace Available

Heating & Cooling Information
Cooling: Central Forced Air
Heating: Forced Air, Gas

Exterior

Exterior Features
View: Local/Neighborhood
Roof: Concrete
Yard/Grounds: Sprinkler(s) (Front), Sprinkler(s) (Rear), Sprinkler(s) (Auto), Fenced

Building Information
Style: Ranch
Subclass: Single Family Home
Building Type: Detached
Concrete Perimeter
Building Height (Minimum): 2
Building Height (Maximum): 2

Property Features
Amenities: Window Covering(s), Double Pane Windows(s)
Living Sq. Ft.: 2,822
Security Features: Security Alarm (Owned)

Property Information
Property Primary ID: 111284

Lot Information
Lot Description: Grade (Level)
Lot Size Area Minimum Units: Sq. Ft.
Lot Size Area Maximum Units: Sq. Ft.
Zoning: R1

Financial

Tax/Assessment Information
City Transfer Tax: No

Utilities

Utility Information
Energy Features: Insulation (Unknown), Double Pane Windows, Ceiling Fan(s)
Sewer Septic: Sewer in Street, Sewer Connected

Water Information
Water: Public

Location

Multi-Unit Information
# of Stories: 2

School Information
Elementary School: William Regnart Elementary
Elementary School District: Cupertino Union
Middle School: John F. Kennedy Middle
High School: Monta Vista High
High School District: Fremont Union High

Public facts

Beds: 5
Baths: 3.0
Sq. Ft.: 2,822
Stories: 2.0
Lot Size: 7,400 square feet
Style: Single Family Residential
Year Built: 1966
Year Renovated: 1966
County: Santa Clara County
APN: 35618064

Home facts updated by county records on Aug 22, 2026

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

$3.95M – $4.78M

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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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20500 Town Center Ln #193, Cupertino, CA 95014

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Home values near 21663 CASTLETON St

Data from public records.

Address	Redfin Estimate
21623 Castleton Street, Cupertino, CA 3 Beds \| 2 Baths \| 1571 Sq. Ft.	$3,058,746
21603 Castleton Street, Cupertino, CA 3 Beds \| 3 Baths \| 2102 Sq. Ft.	$3,482,761

Address	Redfin Estimate
21673 Castleton Street, Cupertino, CA 4 Beds \| 3 Baths \| 2119 Sq. Ft.	$3,608,490
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

Property information provided by MLSListings when last listed in 2006. 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 95014, CA

Sale history for 21663 CASTLETON St

Tax history for 21663 CASTLETON 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 95014

Home values near 21663 CASTLETON St

More real estate resources