Alameda County  »  94546  »  Opal CT  »  20018 Opal CT

20018 Opal Court, Castro Valley, CA 94546 - Property report

Also known as: 20018 Opal CT

Property image for 20018 Opal Court, Castro Valley, CA 94546
static Mapbox map

Property type

Single Family Residential Homes Used as Such (1100)

Year built

1947

Acreage

1.29

General Information

Address
Primary address
20018 Opal Ct
Castro Valley, CA 94546
Zip code
94546
County
Alameda
Parcel ID
84C-669-68

Owner

Find out who owns 20018 Opal Court, Castro Valley, CA 94546. Uncover corporate and individual owners with a free account.

Tax
Tax year
2026-2027
Base tax
$2,055
Current property tax
$1,973
Tax per sq. ft.
$1
Building
Property type
Single Family Residential Homes Used as Such
Building sq. ft.
1,696
Stories
10
Year built
1947
Building material
Wood/wood and steel frames
Rooms
6
Elevator
Bedrooms
3
Bathrooms
10
Lot
Acreage
1.29
Zoning & use
Zoning
Single Family Residential (R1-CSU-RV)
Units
1

Area overview

Walk score
68 /100.  Somewhat Walkable
Transit score
33 /100.  Some Transit
Bike score
47 /100.  Somewhat Bikeable
School district
CASTRO VLY UNIF SCH
Ownership

Ownership information for 20018 Opal Court, Castro Valley, CA

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

Sales history for 20018 Opal Court, 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
07/27/2021 Notice XXXXX XXXX XXXXXX
12/04/2020 Reconveyance XXXXX XXXXXXX X XX
11/19/2020 Deed of trust XXXXX XXXXXXX X XX XXXXXX XXXXXX XXXXXXX XXXXXXX & XXXXX XXXXXXXXXXX
11/19/2020 Deed of trust XXXXX XXXXXXX X XX XXXX XXXX
11/14/2019 Reconveyance XXXXX XXXXXXX X XX
11/14/2019 Reconveyance XXXXX XXXXXXX X XX XX
10/29/2019 Deed of Trust XXXXX XXXXXXX X XX XXXXXXX XXXX
11/06/2017 Reconveyance XXXXX XXXXXXX X XX
10/25/2017 Deed of Trust
Ucc Fin STMT(1-2 PGS)		 XXXXX XXXXXXX X XXX & XX XXXXXXX XXXX
08/30/2016 Reconveyance XXXXX XXXXXXX X XX XX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 20018 Opal Court, 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
$2,055
Current property tax
$1,973
Tax per sq. ft.
$1
Recent tax assessments
Market value
$176,509
Land value
$96,856
Building value
$79,653

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 $173,049 1.164 $2,014 +0.69%
2024-2025 $169,656 1.1791 $2,000 -48.84%
2023-2024 $166,329 2.3508 $3,910 +101.36%
2022-2023 $163,068 1.1908 $1,942 +2.52%
2021-2022 $159,871 1.1848 $1,894 +2.28%
2020-2021 $158,232 1.1703 $1,852 -1.51%
2019-2020 $155,130 1.212 $1,880 +2.36%
2018-2019 $152,088 1.2077 $1,837 +2.65%
2017-2018 $149,107 1.2001 $1,789 +18.55%
2016-2017 $146,182 1.0326 $1,509 -5.16%
Permits

Permit information for 20018 Opal Court, Castro Valley, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
06/22/2026
03/15/2017

*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 20018 Opal Court, 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)
Marshall Elementary School 9 Public K-5 491 0.20
Early Bird Montessori School NR Private PK, K-1 30 0.40
Early Bird Montessori School NR Private PK, K-1 30 0.40
Independent Elementary School 8 Public K-5 634 0.64
Vannoy Elementary School 7 Public K-5 441 0.67
Northstar School NR Private PK-8 152 0.79
Northstar School NR Private PK-8 152 0.79
Redwood Christian Elementary School NR Private K-5 282 0.81
Castro Valley Adult And Career Education NR Public 0 0.85
Special Education-Preschool-Laurel NR Public 1 0.86
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Creekside Middle School 8 Public 6-8 760 0.14
Canyon Middle School 6 Public 6-8 1,332 0.77
Northstar School NR Private PK-8 152 0.79
Castro Valley Adult And Career Education NR Public 0 0.85
Special Education-Preschool-Laurel NR Public 1 0.86
Redwood Christian Schools NR Private K-12 706 0.88
Alma Preschool NR Public 52 0.88
Our Lady Of Grace School NR Private K-8 218 1.16
Stellar Preparatory High School NR Private 9 0 1.53
Anchor Education, Inc. NR Private 3-12 18 1.57
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Castro Valley Adult And Career Education NR Public 0 0.85
Special Education-Preschool-Laurel NR Public 1 0.86
Redwood Christian Schools NR Private K-12 706 0.88
Alma Preschool NR Public 52 0.88
Castro Valley High School 9 Public 9-12 2,799 0.98
Stellar Preparatory High School NR Private 9 0 1.53
Anchor Education, Inc. NR Private 3-12 18 1.57
Sterling West San Francisco Campus NR Private 3-11 27 1.58
Anchor Education, Inc. School NR Private 3-12 0 1.59
Hayward High School 5 Public 9-12 1,712 1.87

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

Neighbors for 20018 Opal Court, Castro Valley, CA

4060 Meadowview Dr, Castro Valley 20117 Center St, Castro Valley 4030 Greenacre Rd, Castro Valley 20585 Center St, Castro Valley 20079 Topaz CT, Castro Valley 4078 Greenacre Rd, Castro Valley 20023 Topaz CT, Castro Valley 4225 Gem Ave, Castro Valley 4297 Gem Ave, Castro Valley 4117 David St, Castro Valley 4214 Veronica Ave, Castro Valley 4038 Greenacre Rd, Castro Valley 20025 Center St, Castro Valley 20182 Sheldon CT, Castro Valley 20159 Sheldon CT, Castro Valley 20021 Onyx CT, Castro Valley 4217 Gem Ave, Castro Valley 20077 Onyx CT, Castro Valley 20046 Garnet CT, Castro Valley 4299 Omega Ave, Castro Valley

Nearby ZIP codes for 20018 Opal Court, 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 20018 Opal Court, Castro Valley, CA 94546?

The development at 20018 Opal Court, Castro Valley, CA 94546 was built in 1947.

What is the total square footage of 20018 Opal Court, Castro Valley, CA 94546?

20018 Opal Court, Castro Valley, CA 94546 has a total of 1,696 square feet.

What is the assessed value of 20018 Opal Court, Castro Valley, CA 94546?

20018 Opal Court, Castro Valley, CA 94546 is currently assessed at $173,049.

What are the property taxes for 20018 Opal Court, Castro Valley, CA 94546?

The property taxes for 20018 Opal Court, Castro Valley, CA 94546 total $2,014.

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