Alameda County  »  94546  »  Carlton Ave  »  18857 Carlton Ave

18857 Carlton Avenue, Castro Valley, CA 94546 - Property report

Also known as: 18857 Carlton Ave

Property image for 18857 Carlton Avenue, Castro Valley, CA 94546
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Property type

Single Family Residential Homes Used as Such (1100)

Year built

1946

Acreage

0.15

General Information

Address
Primary address
18857 Carlton Ave
Castro Valley, CA 94546
Zip code
94546
County
Alameda
Parcel ID
84B-425-2

Owner

Find out who owns 18857 Carlton Avenue, Castro Valley, CA 94546. Uncover corporate and individual owners with a free account.

Tax
Tax year
2025-2026
Base tax
$4,681
Current property tax
$4,599
Tax per sq. ft.
$2
Building
Property type
Single Family Residential Homes Used as Such
Building sq. ft.
3,029
Stories
2
Year built
1946
Building material
Wood/wood and steel frames
Last altered
1993
Rooms
8
Elevator
Bedrooms
5
Bathrooms
3.5
Lot
Acreage
0.15
Zoning & use
Zoning
Single Family Residential (R1-CSU-RV)
Units
1

Area overview

Walk score
49 /100.  Car-Dependent
Transit score
27 /100.  Some Transit
Bike score
16 /100.  Somewhat Bikeable
School district
CASTRO VLY UNIF SCH
Ownership

Ownership information for 18857 Carlton Avenue, Castro Valley, CA

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

Sales history for 18857 Carlton Avenue, Castro Valley, CA 94546

No recently recorded sales for this property.

More about Alameda County property records.

Title documents

Date Type Amount Party 1 Party 2
11/18/2022 Trust Transfer Deed XXXXXXXXXXX XXXXX X XXXXXXXXXXX XXXXX X XXXXXX XXXXX
01/31/2013 Deed of Trust XXXXXXXXXXX XXXXX X XXXXX XXXXX XXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 18857 Carlton Avenue, 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
Base tax
$4,681
Current property tax
$4,599
Tax per sq. ft.
$2
Recent tax assessments
Market value
$402,105
Land value
$69,772
Building value
$332,333

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 $402,105 1.164 $4,681 +0.69%
2024-2025 $394,222 1.1791 $4,648 -48.84%
2023-2024 $386,495 2.3508 $9,086 +101.36%
2022-2023 $378,917 1.1908 $4,512 +2.53%
2021-2022 $371,489 1.1848 $4,401 +2.28%
2020-2021 $367,683 1.1703 $4,303 -1.51%
2019-2020 $360,475 1.212 $4,369 +2.36%
2018-2019 $353,407 1.2077 $4,268 +2.65%
2017-2018 $346,480 1.2001 $4,158 +18.55%
2016-2017 $339,687 1.0326 $3,508 -5.16%
Permits

Permit information for 18857 Carlton Avenue, Castro Valley, CA

No recently recorded permits 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 18857 Carlton Avenue, 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)
Anchor Education, Inc. School NR Private 3-12 0 0.37
Chabot Elementary School 8 Public K-5 470 0.37
Sterling West San Francisco Campus NR Private 3-11 27 0.37
Anchor Education, Inc. NR Private 3-12 18 0.39
Castro Valley Virtual Academy 7 Public K-12 67 0.46
Stanton Elementary School 6 Public K-5 492 0.49
Camelot School NR Private K 14 0.73
Montessori School Of San Leandro NR Private PK-K 130 0.81
Castro Valley Elementary School 6 Public K-5 472 1.00
Hillside Elementary School 2 Public K-5 371 1.17
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Anchor Education, Inc. School NR Private 3-12 0 0.37
Sterling West San Francisco Campus NR Private 3-11 27 0.37
Anchor Education, Inc. NR Private 3-12 18 0.39
Castro Valley Virtual Academy 7 Public K-12 67 0.46
Our Lady Of Grace School NR Private K-8 218 0.84
Seneca Family Of Agencies - James Baldwin Academy NR Private 4-12 75 0.88
Alma Preschool NR Public 52 1.32
Castro Valley Adult And Career Education NR Public 0 1.36
Edendale Middle School 2 Public 6-8 500 1.46
Special Education-Preschool-Laurel NR Public 1 1.98
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Anchor Education, Inc. School NR Private 3-12 0 0.37
Sterling West San Francisco Campus NR Private 3-11 27 0.37
Anchor Education, Inc. NR Private 3-12 18 0.39
Roy A. Johnson High School NR Public 9-12 24 0.46
Castro Valley Virtual Academy 7 Public K-12 67 0.46
Redwood Continuation High School 3 Public 9-12 122 0.46
Seneca Family Of Agencies - James Baldwin Academy NR Private 4-12 75 0.88
Castro Valley High School 9 Public 9-12 2,799 1.01
Redwood Christian Schools NR Private K-12 706 1.24
Alma Preschool NR Public 52 1.32

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

Neighbors for 18857 Carlton Avenue, Castro Valley, CA

18845 Carlton Ave, Castro Valley 2831 Sydney Way, Castro Valley 18849 Carlton Ave, Castro Valley 18935 Carlton Ave, Castro Valley 2808 Jennifer Dr, Castro Valley 18813 Carlton Ave, Castro Valley 2987 Sydney Way, Castro Valley 2833 Sydney Way, Castro Valley 2989 Giovana Way, Castro Valley 2813 Jennifer Dr, Castro Valley 2807 Jennifer Dr, Castro Valley 2979 Sydney Way, Castro Valley 2971 Sydney Way, Castro Valley 2839 Sydney Way, Castro Valley 2814 Jennifer Dr, Castro Valley 2823 Jennifer Dr, Castro Valley 2829 Jennifer Dr, Castro Valley 2819 Jennifer Dr, Castro Valley 2995 Sydney Way, Castro Valley

Nearby ZIP codes for 18857 Carlton Avenue, 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 18857 Carlton Avenue, Castro Valley, CA 94546?

The development at 18857 Carlton Avenue, Castro Valley, CA 94546 was built in 1946.

What is the total square footage of 18857 Carlton Avenue, Castro Valley, CA 94546?

18857 Carlton Avenue, Castro Valley, CA 94546 has a total of 3,029 square feet.

What is the assessed value of 18857 Carlton Avenue, Castro Valley, CA 94546?

18857 Carlton Avenue, Castro Valley, CA 94546 is currently assessed at $402,105.

What are the property taxes for 18857 Carlton Avenue, Castro Valley, CA 94546?

The property taxes for 18857 Carlton Avenue, Castro Valley, CA 94546 total $4,680.

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