Alameda County  »  94546  »  Sydney Cir  »  18911 Sydney Cir

18911 Sydney Circle, Castro Valley, CA 94546 - Property report

Also known as: 18911 Sydney Cir

Property image for 18911 Sydney Circle, Castro Valley, CA 94546
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Property type

Single Family Residential - Planned Development Tract with Common Area (1800)

Year built

1990

Acreage

1.14

Sale price

$1,375,000

General Information

Address
Primary address
18911 Sydney Cir
Castro Valley, CA 94546
Zip code
94546
County
Alameda
Parcel ID
84B-415-61

Owner

Find out who owns 18911 Sydney Circle, Castro Valley, CA 94546. Uncover corporate and individual owners with a free account.

Sales
Sale date
07/17/2026
Sale price
$1,375,000
Arm's length
Tax
Tax year
2026-2027
Base tax
$6,235
Current property tax
$6,154
Tax per sq. ft.
$3
Building
Property type
Single Family Residential - Planned Development Tract with Common Area
Building sq. ft.
1,914
Stories
15
Year built
1990
Building material
Wood/wood and steel frames
Rooms
7
Elevator
Bedrooms
4
Bathrooms
25
Lot
Acreage
1.14
Zoning & use
Zoning
Planned Development (PD-1794)
Units
1

Area overview

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

Ownership information for 18911 Sydney Circle, Castro Valley, CA

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

Sales history for 18911 Sydney Circle, Castro Valley, CA 94546

Sale date Sale price Buyer name Seller name
07/17/2026 $1,375,000
05/04/2026 $1,100,000 XXXXXX XXXXXX XXX XXXXX XXXXXX; XXXX XXXX XXX

*Most recent sales on record for this property.

More about Alameda County property records.

Title documents

Date Type Amount Party 1 Party 2
07/17/2026 Deed of Trust
07/17/2026 Grant Deed
05/04/2026 Deed of trust
Assignment of rents
Ucc fin stmt(1-2 pgs)		 XXXXXX XXXXXX XXX XXXXX XXXXXXX XXX
05/04/2026 Deed of trust
Assignment of rents
Ucc fin stmt(1-2 pgs)		 XXXXXX XXXXXX XXX XXXXX XXXXXXX XXX
05/04/2026 Grant Deed XXXXX XXXXXX XXXXXX XXXXXX XXX
05/04/2026 Revocation deed XXXXX XXXXXX XXX XXXXX
09/18/2017 Transfer Deed XXXXX XXXXXX XXX XXXXX XXXXX XXXXXXX XX XXX
09/18/2017 Transfer Deed XXXX XXXX XXX XXXXX XXXXXXX XX XXX
10/19/2016 Reconveyance
Substitution of Trustee		 XXXXX XXXXXX XXXXX XXXXXX
10/19/2016 Deed of Trust XXXXX XXXXXX X XXXX XX XXXXXXX X X XX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 18911 Sydney Circle, Castro Valley, CA

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

Current property tax
Tax year
2026-2027
Base tax
$6,235
Current property tax
$6,154
Tax per sq. ft.
$3
Recent tax assessments
Market value
$535,654
Land value
$160,696
Building value
$374,958

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 $525,151 1.164 $6,113 +0.69%
2024-2025 $514,857 1.1791 $6,071 -48.84%
2023-2024 $504,764 2.3508 $11,866 +101.36%
2022-2023 $494,868 1.1908 $5,893 +2.52%
2021-2022 $485,166 1.1848 $5,748 +2.28%
2020-2021 $480,191 1.1703 $5,620 -1.51%
2019-2020 $470,778 1.212 $5,706 +2.36%
2018-2019 $461,548 1.2077 $5,574 +2.65%
2017-2018 $452,500 1.2001 $5,430 +18.54%
2016-2017 $443,630 1.0326 $4,581 -5.16%
Permits

Permit information for 18911 Sydney Circle, Castro Valley, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
07/28/2026

*Most recent permit 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 18911 Sydney Circle, 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)
Stanton Elementary School 6 Public K-5 492 0.55
Anchor Education, Inc. School NR Private 3-12 0 0.57
Sterling West San Francisco Campus NR Private 3-11 27 0.58
Chabot Elementary School 8 Public K-5 470 0.59
Anchor Education, Inc. NR Private 3-12 18 0.59
Castro Valley Virtual Academy 7 Public K-12 67 0.62
Montessori School Of San Leandro NR Private PK-K 130 0.66
Montessori School Of San Leandro NR Private PK-K 130 0.66
Hillside Elementary School 2 Public K-5 371 0.96
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Anchor Education, Inc. School NR Private 3-12 0 0.57
Sterling West San Francisco Campus NR Private 3-11 27 0.58
Anchor Education, Inc. NR Private 3-12 18 0.59
Castro Valley Virtual Academy 7 Public K-12 67 0.62
Seneca Family Of Agencies - James Baldwin Academy NR Private 4-12 75 0.67
International Bible Baptist Academy NR Private PK-8 25 1.00
Edendale Middle School 2 Public 6-8 500 1.26
Alma Preschool NR Public 52 1.54
Castro Valley Adult And Career Education NR Public 0 1.58
Special Education-Preschool-Laurel NR Public 1 2.12
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Anchor Education, Inc. School NR Private 3-12 0 0.57
Sterling West San Francisco Campus NR Private 3-11 27 0.58
Anchor Education, Inc. NR Private 3-12 18 0.59
Redwood Continuation High School 3 Public 9-12 122 0.62
Roy A. Johnson High School NR Public 9-12 24 0.62
Castro Valley Virtual Academy 7 Public K-12 67 0.62
Seneca Family Of Agencies - James Baldwin Academy NR Private 4-12 75 0.67
Castro Valley High School 9 Public 9-12 2,799 1.23
Lighthouse Christian Academy NR Private K-12 30 1.23
Alma Preschool NR Public 52 1.54

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

Neighbors for 18911 Sydney Circle, Castro Valley, CA

18898 Sydney Cir, Castro Valley 18743 Carlton Ave, Castro Valley 18744 Sydney Cir, Castro Valley 18892 Sydney Cir, Castro Valley 18789 Sydney Cir, Castro Valley 18732 Sydney Cir, Castro Valley 18804 Sydney Cir, Castro Valley 18807 Sydney Cir, Castro Valley 18831 Sydney Cir, Castro Valley 2820 Sydney Way, Castro Valley 18813 Sydney Cir, Castro Valley 18810 Sydney Cir, Castro Valley 18457 Carlton Ave, Castro Valley 18762 Sydney Cir, Castro Valley 18795 Sydney Cir, Castro Valley 18785 Carlton Ave, Castro Valley 2960 Sydney Way, Castro Valley 18765 Carlton Ave, Castro Valley 18816 Sydney Cir, Castro Valley 3141 Alexis Pl, Castro Valley

Nearby ZIP codes for 18911 Sydney Circle, Castro Valley, CA

94541, Alameda County, CA 94542, Alameda County, CA 94544, Alameda County, CA 94545, Alameda County, CA 94552, Alameda County, CA 94577, Alameda County, CA 94578, Alameda County, CA 94579, Alameda County, CA 94580, Alameda County, CA 94601, Alameda County, CA 94603, Alameda County, CA 94605, Alameda County, CA 94613, Alameda County, CA 94619, Alameda County, CA 94621, Alameda County, CA

Frequently asked questions

What is the year built for 18911 Sydney Circle, Castro Valley, CA 94546?

The development at 18911 Sydney Circle, Castro Valley, CA 94546 was built in 1990.

What is the total square footage of 18911 Sydney Circle, Castro Valley, CA 94546?

18911 Sydney Circle, Castro Valley, CA 94546 has a total of 1,914 square feet.

When was 18911 Sydney Circle, Castro Valley, CA 94546 last sold and what was the sale price?

18911 Sydney Circle, Castro Valley, CA 94546 was last sold on 07/17/2026 for $1,375,000.

What is the assessed value of 18911 Sydney Circle, Castro Valley, CA 94546?

18911 Sydney Circle, Castro Valley, CA 94546 is currently assessed at $535,654.

What are the property taxes for 18911 Sydney Circle, Castro Valley, CA 94546?

The property taxes for 18911 Sydney Circle, Castro Valley, CA 94546 total $6,235.

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Do not rely on this report to support investment decisions. The only authoritative source for the information in this report is the government agencies from which the data was acquired.

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