Santa Clara County  »  95014  »  Castleton St  »  21723 Castleton St

21723 Castleton Street, Cupertino, CA 95014 - Property report

Also known as: 21723 Castleton St

Property image for 21723 Castleton Street, Cupertino, CA 95014
static Mapbox map

Property type

Single Family (01)

Acreage

0.175

Sale price

$1,334,000

General Information

Address
Primary address
21723 Castleton St
Cupertino, CA 95014
Zip code
95014
County
Santa Clara
Municipality
Cupertino
Parcel ID
356-18-069
Tract
4104

Owner

Find out who owns 21723 Castleton Street, Cupertino, CA 95014. Uncover corporate and individual owners with a free account.

Sales
Sale date
04/26/2012
Sale price
$1,334,000
Arm's length
Tax
Tax year
2025-2026
Base tax
$19,497
Current property tax
$19,415
Building
Property type
Single Family
Lot
Acreage
0.175
Zoning & use
Zoning
Single Family Residential (R1)

Area overview

Walk score
18 /100.  Car-Dependent
Transit score
0 /100.  No Nearby Transit
Bike score
31 /100.  Somewhat Bikeable
School district
13016
Ownership

Ownership information for 21723 Castleton Street, Cupertino, CA

Property owner name
Registered owner
Source
Deed
Owner contact information
Phone number
Owner address
Documents

Sales history for 21723 Castleton Street, Cupertino, CA 95014

Sale date Sale price Buyer name Seller name
04/26/2012 $1,334,000 XXXXXXXX, XXXXXXXX; XXXXXXXXXXX, XXXXX XXXX, XXXXXXX X XX; XXXXX, XXXXXXX XXXXX XX; XXXXX, XXXXXX XXXXXXX XX; XXXXX, XXXXXXX XXXXXX XX

*Most recent sale on record for this property.

More about Santa Clara County property records.

Title documents

Date Type Amount Party 1 Party 2
12/22/2025 Quitclaim Deed XXXXXXXX, XXXXXXXX XXXXXXXX, XXXXXXXX XXXXXXX
05/27/2015 Deed of Trust/Mortgage/Securit XXXXX, XXXXXXXXXXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX, XXX. XXXXXXX
05/28/2014 Deed of Trust/Mortgage/Securit XXXXX, XXXXXXXXXXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX, XXX. XXXXXXX
05/28/2014 Grant Deed XXXXX, XXXXXXXXXXX XXXXX, XXXXXXXXXXX
04/26/2012 Deed of Trust/Mortgage/Securit XXXXXXXX, XXXXXXXX XXXXXXXX XXXXXXXXXX XXX XXXXX XXX XXX
04/26/2012 Power Attorney XXXXXXXX, XXXXXXXX XXXXX, XXXXXXXXXXX X
04/26/2012 Grant Deed XXXXX, XXXXXXX XXXXXX XX XXXXXXXX, XXXXXXXX
08/29/2011 Affidavit of Death/Affidavit D XXXXX, XXXXXX X XX XXXX
10/07/1999 Deed XXXXX, XXXXX X & XXXXXX X XXXXX XXXXX
10/07/1999 Deed XXXXXX, XXXXX X & XXXXXX X XXXXX, XXXXX X & XXXXXX X

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 21723 Castleton Street, Cupertino, CA

Property tax data includes tax amount, market value and assessed value, exemptions, abatements and assessment history.

Current property tax
Tax year
2025-2026
Base tax
$19,497
Current property tax
$19,415
Recent tax assessments
Market value
$1,675,564
Land value
$1,340,456
Building value
$335,108

More about Santa Clara County property taxes

Assessment history

See the assessment and property tax history, including the evolution of the total tax rate and corresponding property tax amount.

Tax year Assessed value Tax rate Property tax Y-o-Y change
2025-2026 $1,675,564 1.1636 $19,497 +2.79%
2024-2025 $1,642,711 1.1547 $18,968 +0.74%
2023-2024 $1,610,502 1.1691 $18,828 +2.18%
2022-2023 $1,578,925 1.167 $18,426 +0.94%
2021-2022 $1,547,967 1.1793 $18,255 +1.16%
2020-2021 $1,532,095 1.1778 $18,045 +2.33%
2019-2020 $1,502,055 1.174 $17,634 +2.41%
2018-2019 $1,472,604 1.1693 $17,219 +0.47%
2017-2018 $1,443,731 1.1872 $17,139 +3.18%
2016-2017 $1,415,424 1.1736 $16,611 +0.56%
Permits

Permit information for 21723 Castleton Street, Cupertino, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
03/08/2016
04/02/2015

*Most recent permits on record for this property.

Neighborhood

Risk

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FEMA flood zones

FEMA flood zones
0.2
Landslides and liquefaction map

Fire hazard zones

Faults and tsunami inundation zones map

Transportation

Daily traffic map
View daily traffic map

Access the detailed traffic volume map for 21723 Castleton Street, Cupertino, CA 95014 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
Abraham Lincoln Elementary School 8 Public K-5 665 0.45
William Faria Elementary School 9 Public K-5 632 1.21
Stevens Creek Elementary School 8 Public K-5 389 1.42
Happy Days CDC NR Private K 0 1.50
R. I. Meyerholz Elementary School NR Public K-5 699 1.55
Villa Montessori NR Private PK-K 37 1.61
Villa Montessori NR Private PK-K 37 1.61
C. B. Eaton Elementary School 9 Public K-5 470 1.61
Garden Gate Elementary School 8 Public K-5 517 1.73
St. Joseph of Cupertino Elementary School NR Private PK-8 243 1.76
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
John F. Kennedy Middle School 9 Public 6-8 930 0.28
Legend College Preparatory NR Private 6-12 553 0.89
The Academy for Educational Excellence NR Private 6-12 0 0.91
St. Joseph of Cupertino Elementary School NR Private PK-8 243 1.76
Sam H. Lawson Middle School 9 Public 6-8 816 2.14
Futures Academy - Cupertino NR Private 7-12 55 2.28
Cupertino Middle School 7 Public 6-8 1,099 2.32
Joaquin Miller Middle School 9 Public 6-8 1,078 2.35
Creative Learning Center NR Private K-12 26 2.37
Warren E. Hyde Middle School 7 Public 6-8 778 2.41
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Monta Vista High School 9 Public 9-12 1,751 0.52
Legend College Preparatory NR Private 6-12 553 0.89
Legend College Preparatory NR Private 9-12 50 0.89
The Academy for Educational Excellence NR Private 6-12 0 0.91
Homestead High School 8 Public 9-12 2,311 2.02
Futures Academy - Cupertino NR Private 7-12 55 2.28
Creative Learning Center NR Private K-12 26 2.37
Cupertino High School 9 Public 9-12 1,997 2.61
Lynbrook High School 10 Public 9-12 1,741 2.78
Prospect High School 7 Public 9-12 1,459 3.13

Data provided by GreatSchools.org © 2026. All rights reserved.

Neighbors for 21723 Castleton Street, Cupertino, CA

21775 Collingsworth St, Cupertino 11129 Sutherland Ave, Cupertino 11139 Sutherland Ave, Cupertino 11166 Linda Vista Dr, Cupertino 21753 Castleton St, Cupertino 11075 LA Paloma Dr, Cupertino 21598 Rosario Ave, Cupertino 11150 Santa Teresa Dr, Cupertino 21613 Castleton St, Cupertino 11160 Santa Teresa Dr, Cupertino 11051 Santa Teresa Dr, Cupertino 11130 Santa Teresa Dr, Cupertino 21583 Castleton St, Cupertino 21592 Columbus Ave, Cupertino 21573 Castleton St, Cupertino 11092 Bel Aire CT, Cupertino 11140 Santa Teresa Dr, Cupertino 21623 Castleton St, Cupertino 10883 Leavesley Pl, Cupertino 21602 Columbus Ave, Cupertino

Nearby ZIP codes for 21723 Castleton Street, Cupertino, CA

94022, Santa Clara County, CA 94024, Santa Clara County, CA 94041, Santa Clara County, CA 94043, Santa Clara County, CA 95033, Santa Clara County, CA 95070, Santa Clara County, CA 95117, Santa Clara County, CA 95128, Santa Clara County, CA 95129, Santa Clara County, CA 95130, Santa Clara County, CA

Frequently asked questions

When was 21723 Castleton Street, Cupertino, CA 95014 last sold and what was the sale price?

21723 Castleton Street, Cupertino, CA 95014 was last sold on 04/26/2012 for $1,334,000.

What is the assessed value of 21723 Castleton Street, Cupertino, CA 95014?

21723 Castleton Street, Cupertino, CA 95014 is currently assessed at $1,675,564.

What are the property taxes for 21723 Castleton Street, Cupertino, CA 95014?

The property taxes for 21723 Castleton Street, Cupertino, CA 95014 total $19,496.

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