Alameda County  »  94552  »  Greenridge CT  »  18509 Greenridge CT

18509 Greenridge Court, Castro Valley, CA 94552 - Property report

Also known as: 18509 Greenridge CT

Property image for 18509 Greenridge Court, Castro Valley, CA 94552
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Property type

Single Family Residential Homes Used as Such (1100)

Year built

1976

Acreage

5.35

Sale price

$1,435,000

General Information

Address
Primary address
18509 Greenridge Ct
Castro Valley, CA 94552
Zip code
94552
County
Alameda
Parcel ID
85-1613-7

Owner

Find out who owns 18509 Greenridge Court, Castro Valley, CA 94552. Uncover corporate and individual owners with a free account.

Sales
Sale date
08/01/2025
Sale price
$1,435,000
Arm's length
Tax
Tax year
2026-2027
Base tax
$16,703
Current property tax
$16,622
Tax per sq. ft.
$7
Building
Property type
Single Family Residential Homes Used as Such
Building sq. ft.
2,344
Stories
20
Year built
1976
Building material
Wood/wood and steel frames
Last altered
1978
Elevator
Bedrooms
4
Bathrooms
25
Lot
Acreage
5.35
Zoning & use
Zoning
Single Family Residential (R1-BE-CSU-R)
Units
1

Area overview

Walk score
8 /100.  Car-Dependent
Transit score
0 /100.  No Nearby Transit
Bike score
3 /100.  Somewhat Bikeable
School district
CASTRO VLY UNIF SCH
Ownership

Ownership information for 18509 Greenridge Court, Castro Valley, CA

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

Sales history for 18509 Greenridge Court, Castro Valley, CA 94552

Sale date Sale price Buyer name Seller name
08/01/2025 $1,435,000 XXXX XXXXX X; XXXX XXXX XXXXX XXX XXXXXX XXXXXX XXXXX; XXXXXX XXXXXX X XX

*Most recent sale on record for this property.

More about Alameda County property records.

Title documents

Date Type Amount Party 1 Party 2
08/01/2025 Deed of trust XXXX XXXXX X XXXXXXX XXXXXXXXX XXX
08/01/2025 Grant Deed XXXXXX XXXXXX XXXXX XXXX XXXXX X
08/01/2025 Appointment of trustee XXXXXX XXXXXXXX X XX XXXXXX XXXXXX X XX
12/12/2018 Correction Grant Deed XXXXXX XXXXXXXX X XXXXXX XXXXXXXX X XX
09/28/1993 Deed XXXXXX, X.&X XXXXXX XXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 18509 Greenridge 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
$16,703
Current property tax
$16,622
Tax per sq. ft.
$7
Recent tax assessments
Market value
$1,435,000
Land value
$430,500
Building value
$1,004,500

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 $256,101 1.164 $2,981 +0.69%
2024-2025 $251,080 1.1791 $2,960 -48.84%
2023-2024 $246,157 2.3508 $5,787 +101.36%
2022-2023 $241,331 1.1908 $2,874 +2.52%
2021-2022 $236,599 1.1848 $2,803 +2.28%
2020-2021 $234,174 1.1703 $2,741 -1.99%
2019-2020 $229,583 1.218 $2,796 +2.87%
2018-2019 $225,081 1.2077 $2,718 +2.65%
2017-2018 $220,668 1.2001 $2,648 +19.10%
2016-2017 $216,343 1.0278 $2,224 -5.60%
Permits

Permit information for 18509 Greenridge Court, Castro Valley, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
11/07/2017
01/13/2014

*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 18509 Greenridge Court, Castro Valley, CA 94552 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)
Liberty School NR Private 1-12 0 0.14
Jensen Ranch Elementary School 9 Public K-5 382 0.93
Vannoy Elementary School 7 Public K-5 441 1.03
Early Bird Montessori School NR Private PK, K-1 30 1.33
Early Bird Montessori School NR Private PK, K-1 30 1.33
Independent Elementary School 8 Public K-5 634 1.37
Proctor Elementary School 8 Public K-5 584 1.45
Castro Valley Adult And Career Education NR Public 0 1.51
Alma Preschool NR Public 52 1.54
Redwood Christian Schools NR Private K-12 706 1.64
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Liberty School NR Private 1-12 0 0.14
Canyon Middle School 6 Public 6-8 1,332 0.93
Creekside Middle School 8 Public 6-8 760 1.51
Castro Valley Adult And Career Education NR Public 0 1.51
Alma Preschool NR Public 52 1.54
Redwood Christian Schools NR Private K-12 706 1.64
Northstar School NR Private PK-8 152 2.09
Our Lady Of Grace School NR Private K-8 218 2.34
Anchor Education, Inc. NR Private 3-12 18 2.48
Castro Valley Virtual Academy 7 Public K-12 67 2.49
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Liberty School NR Private 1-12 0 0.14
Castro Valley Adult And Career Education NR Public 0 1.51
Alma Preschool NR Public 52 1.54
Redwood Christian Schools NR Private K-12 706 1.64
Castro Valley High School 9 Public 9-12 2,799 1.92
Anchor Education, Inc. NR Private 3-12 18 2.48
Castro Valley Virtual Academy 7 Public K-12 67 2.49
Roy A. Johnson High School NR Public 9-12 24 2.49
Redwood Continuation High School 3 Public 9-12 122 2.49
Sterling West San Francisco Campus NR Private 3-11 27 2.50

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

Neighbors for 18509 Greenridge Court, Castro Valley, CA

6085 Monte Verde CT, Castro Valley 18555 Greenridge CT, Castro Valley 6087 Greenridge Rd, Castro Valley 6065 Monte Verde CT, Castro Valley 6003 Greenridge Rd, Castro Valley 6075 Greenridge Rd, Castro Valley 18569 Greenridge CT, Castro Valley 18575 Greenridge CT, Castro Valley 6116 Greenridge Rd, Castro Valley 6063 Greenridge Rd, Castro Valley 6051 Greenridge Rd, Castro Valley 18517 Greenridge CT, Castro Valley 18541 Greenridge CT, Castro Valley 6039 Greenridge Rd, Castro Valley 6072 Monte Verde CT, Castro Valley 18505 Mesa Verde Way, Castro Valley 5833 Blue Bird CT, Castro Valley 18533 Greenridge CT, Castro Valley 18549 Greenridge CT, Castro Valley 18501 Greenridge CT, Castro Valley

Nearby ZIP codes for 18509 Greenridge Court, Castro Valley, CA

94541, Alameda County, CA 94542, Alameda County, CA 94544, Alameda County, CA 94545, Alameda County, CA 94546, Alameda County, CA 94568, Alameda County, CA 94577, Alameda County, CA 94578, Alameda County, CA 94579, Alameda County, CA 94580, Alameda County, CA 94587, Alameda County, CA 94588, Alameda County, CA 94605, Alameda County, CA 94619, Alameda County, CA

Frequently asked questions

What is the year built for 18509 Greenridge Court, Castro Valley, CA 94552?

The development at 18509 Greenridge Court, Castro Valley, CA 94552 was built in 1976.

What is the total square footage of 18509 Greenridge Court, Castro Valley, CA 94552?

18509 Greenridge Court, Castro Valley, CA 94552 has a total of 2,344 square feet.

When was 18509 Greenridge Court, Castro Valley, CA 94552 last sold and what was the sale price?

18509 Greenridge Court, Castro Valley, CA 94552 was last sold on 08/01/2025 for $1,435,000.

What is the assessed value of 18509 Greenridge Court, Castro Valley, CA 94552?

18509 Greenridge Court, Castro Valley, CA 94552 is currently assessed at $1,435,000.

What are the property taxes for 18509 Greenridge Court, Castro Valley, CA 94552?

The property taxes for 18509 Greenridge Court, Castro Valley, CA 94552 total $16,703.

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