Alameda County  »  94546  »  Knoll Way  »  21573 Knoll Way

21573 Knoll Way, Castro Valley, CA 94546 - Property report

Also known as: 21573 Knoll Way

Property image for 21573 Knoll Way, Castro Valley, CA 94546
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Property type

Single Family Residential Homes Used as Such (1100)

Year built

1957

Acreage

0.14

Sale price

$440,000

General Information

Address
Primary address
21573 Knoll Way
Castro Valley, CA 94546
Zip code
94546
County
Alameda
Parcel ID
415-180-60

Owner

Find out who owns 21573 Knoll Way, Castro Valley, CA 94546. Uncover corporate and individual owners with a free account.

Sales
Sale date
09/07/2012
Sale price
$440,000
Arm's length
Tax
Tax year
2025-2026
Property tax
$6,352
Tax per sq. ft.
$4
Building
Property type
Single Family Residential Homes Used as Such
Building sq. ft.
1,440
Stories
1
Year built
1957
Building material
Wood/wood and steel frames
Last altered
1980
Rooms
6
Elevator
Bedrooms
3
Bathrooms
2
Lot
Acreage
0.14
Zoning & use
Zoning
Single Family Residential (R1-CSU-RV)
Units
1

Area overview

Walk score
49 /100.  Car-Dependent
Transit score
43 /100.  Some Transit
Bike score
28 /100.  Somewhat Bikeable
School district
HAYWARD UNIF SCH
Ownership

Ownership information for 21573 Knoll Way, Castro Valley, CA

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

Sales history for 21573 Knoll Way, Castro Valley, CA 94546

Sale date Sale price Buyer name Seller name
09/07/2012 $440,000 XXXXXXX XXXXX XXXXXX XXXXXXX X XX; XXXXXXX XXXXXX X XXXXX
12/15/1994 $220,000 XXXXXXX, XXXXXX X XXXXX XXXXXXX, XXXXXX X

*Most recent sales on record for this property.

More about Alameda County property records.

Title documents

Date Type Amount Party 1 Party 2
02/22/2021 Deed of trust XXXXXXX XXXXX XXXXXXXXXXXX XXXXXXXX XXX
09/07/2012 Deed of Trust XXXXXXX XXXXX XXXX
09/07/2012 Grant Deed XXXXXX XXXXXXX X XX XXXXXXX XXXXX
03/03/2000 Deed XXXXXXX, XXXXXX XXXXXXX XXXXX
12/15/1994 Deed XXXXXXX, XXXXXX X XXXXXXX, XXXXXX X XXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 21573 Knoll Way, Castro Valley, CA

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

Current property tax
Tax year
2025-2026
Property tax
$6,352
Tax per sq. ft.
$4
Recent tax assessments
Market value
$541,807
Land value
$162,542
Building value
$379,265

More about Alameda 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 $541,807 1.1724 $6,352 +0.98%
2024-2025 $531,184 1.1842 $6,290 -22.76%
2023-2024 $520,770 1.5638 $8,144 +34.17%
2022-2023 $510,561 1.1888 $6,070 +0.81%
2021-2022 $500,551 1.2028 $6,021 +1.18%
2020-2021 $495,421 1.2012 $5,951 -0.87%
2019-2020 $485,711 1.236 $6,003 +6.95%
2018-2019 $476,190 1.1788 $5,613 +2.50%
2017-2018 $466,852 1.173 $5,476 +5.58%
2016-2017 $457,700 1.1332 $5,187 +2.16%
Permits

Permit information for 21573 Knoll Way, Castro Valley, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
02/08/2023
04/18/2022
09/05/2013

*Most recent permits on record for this property.

Neighborhood

Castro Valley residential market stats

Access a detailed real estate market overview of Castro Valley so you can assess current trends, home values, types of properties sold and transaction volume. View the median home sale price in Castro Valley and compare it to other neighborhoods in Alameda.

Median sale price

$1,013,750

-2.9% Y-o-Y

Median price/sq. ft.

$619

-9.8% Y-o-Y

Alameda county median sale price

$955,000

-6.4% Y-o-Y

Check out recently sold homes in Castro Valley and see how their prices compare.

Risk

Create a free account to unlock expanded risk information, such as crime incidents in the area, tsunami and landslides risks, or its location relative to FEMA flood zones and the Coastal Barriers Resources System Area (COBRA).

FEMA flood zones

FEMA flood zones
X
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 21573 Knoll Way, Castro Valley, CA 94546 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)
Strobridge Elementary School NR Public K-6 362 0.26
The Montessori Giving Tree NR Private K-6 12 0.31
Liber Community School NR Private 4-12 0 0.40
Crossroads Christian Elementary School NR Private K-6 0 0.63
Vita Academy NR Private 1-6 0 0.80
Knowledge Enlightens You (Key) Academy 5 Charter K-8 614 0.86
Harder Elementary School 3 Public K-6 675 0.86
Special Education-Preschool-Laurel NR Public 1 0.93
Cherryland Elementary School 3 Public K-6 903 0.93
Faith Ringgold School of Arts and Science 1 Public K-8 111 0.96
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Liber Community School NR Private 4-12 0 0.40
Knowledge Enlightens You (Key) Academy 5 Charter K-8 614 0.86
Special Education-Preschool-Laurel NR Public 1 0.93
Stellar Preparatory High School NR Private 9 0 0.96
Faith Ringgold School of Arts and Science 1 Public K-8 111 0.96
Hayward Adult NR Public 0 1.01
All Saints Catholic School NR Private K-8 203 1.01
Our Lady Of Grace School NR Private K-8 218 1.15
Bret Harte Middle School 5 Public 7-8 545 1.15
Anchor Education, Inc. School NR Private 3-12 0 1.49
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Liber Community School NR Private 4-12 0 0.40
Stellar Preparatory High School NR Private 9-11 26 0.87
Special Education-Preschool-Laurel NR Public 1 0.93
Stellar Preparatory High School NR Private 9 0 0.96
Hayward Adult NR Public 0 1.01
Brenkwitz High School 2 Public 9-12 179 1.04
Hayward High School 5 Public 9-12 1,712 1.44
Anchor Education, Inc. School NR Private 3-12 0 1.49
Anchor Education, Inc. NR Private 3-12 18 1.49
Castro Valley High School 9 Public 9-12 2,799 1.54

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

Neighbors for 21573 Knoll Way, Castro Valley, CA

1435 Grove Way, Castro Valley 21484 Gary Dr, Castro Valley 21561 Knoll Way, Castro Valley 21500 Gary Dr, Castro Valley 1869 Riverbank Ave, Castro Valley 21465 Bedford Dr, Castro Valley 1515 Grove Way, Castro Valley 1854 Grove Way, Castro Valley 21531 Knoll Way, Castro Valley 1657 Grove Way, Castro Valley 1535 Grove Way, Castro Valley 1523 Grove Way, Castro Valley 1491 Grove Way, Castro Valley 1524 Grove Way, Castro Valley 21631 Shadyspring Rd, Castro Valley 21611 Knoll Way, Castro Valley 21525 Knoll Way, Castro Valley 1516 Grove Way, Castro Valley 1508 Grove Way, Castro Valley 21459 Bedford Dr, Castro Valley

Nearby ZIP codes for 21573 Knoll Way, Castro Valley, CA

94542, Alameda County, CA 94579, Alameda County, CA 94601, Alameda County, CA 94613, Alameda County, CA 94619, Alameda County, CA

Frequently asked questions

What is the year built for 21573 Knoll Way, Castro Valley, CA 94546?

The development at 21573 Knoll Way, Castro Valley, CA 94546 was built in 1957.

What is the total square footage of 21573 Knoll Way, Castro Valley, CA 94546?

21573 Knoll Way, Castro Valley, CA 94546 has a total of 1,440 square feet.

When was 21573 Knoll Way, Castro Valley, CA 94546 last sold and what was the sale price?

21573 Knoll Way, Castro Valley, CA 94546 was last sold on 09/07/2012 for $440,000.

What is the assessed value of 21573 Knoll Way, Castro Valley, CA 94546?

21573 Knoll Way, Castro Valley, CA 94546 is currently assessed at $541,807.

What are the property taxes for 21573 Knoll Way, Castro Valley, CA 94546?

The property taxes for 21573 Knoll Way, Castro Valley, CA 94546 total $6,352.

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