Alameda County  »  94546  »  Gem Ave  »  4204 Gem Ave

4204 Gem Avenue, Castro Valley, CA 94546 - Property report

Also known as: 4204 Gem Ave

Property image for 4204 Gem Avenue, Castro Valley, CA 94546
static Mapbox map

Property type

2 Units, Single Family Residence with Detached Accessory Dwelling Unit, R&t 402.1 (2542)

Year built

1947

Acreage

0.19

Sale price

$455,000

General Information

Address
Primary address
4204 Gem Ave
Castro Valley, CA 94546
Zip code
94546
County
Alameda
Parcel ID
84C-669-38

Owner

Find out who owns 4204 Gem Avenue, Castro Valley, CA 94546. Uncover corporate and individual owners with a free account.

Sales
Sale date
02/10/2014
Sale price
$455,000
Arm's length
Tax
Tax year
2025-2026
Property tax
$7,271
Tax per sq. ft.
$4
Building
Property type
2 Units, Single Family Residence with Detached Accessory Dwelling Unit, R&t 402.1
Building sq. ft.
1,978
Stories
1
Year built
1947
Building material
Wood/wood and steel frames
Rooms
8
Elevator
Bedrooms
5
Bathrooms
3
Lot
Acreage
0.19
Zoning & use
Zoning
Single Family Residential (R1-CSU-RV)
Units
2

Area overview

Walk score
61 /100.  Somewhat Walkable
Transit score
36 /100.  Some Transit
Bike score
42 /100.  Somewhat Bikeable
School district
CASTRO VLY UNIF SCH
Ownership

Ownership information for 4204 Gem Avenue, Castro Valley, CA

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

Sales history for 4204 Gem Avenue, Castro Valley, CA 94546

Sale date Sale price Buyer name Seller name
02/10/2014 $455,000 XXXX XXX XXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXX XXXXX XXXX X X; XXXXX XXXXXXX XXXX XXX; XXXXX XXXXX XXXX X X; XXXXXXXX XXXXXXXX XXX
09/11/2012 $265,776 XXXXXXXX XXXXXXXX XXXXXXXX XXXXX XXXXX XXXX; XXXXX XXXXXXX XXXX; XXXXX XXXXX XXXX XXX XXXXXXX XXXXXXXXXXXX XXXXXXXXXXX XX; XXXX XXXXXX X
05/22/1995 $159,000 XXXX, XXXXXX XXXXX XXXXXX, XXXXXXXXX X

*Most recent sales on record for this property.

More about Alameda County property records.

Title documents

Date Type Amount Party 1 Party 2
02/10/2014 Interspousal Transfer Deed XXX XXXXXXXXX XXXX XXX XXX
02/10/2014 Grant Deed XXXXXXXX XXXXXXXX XXXXXXXX XXXXX XXXXX XXXX X X XXXX XXX XXX
09/11/2012 Trustee's Deed Upon Sale XXX XXXXXXX XXXXXXXXXXXX XXXXXXXXXXX XX XXXXXXXX XXXXXXXX XXXXXXXX XXXXX XXXXX XXXX
05/14/2009 Deed XXXX, XXXXXX X XXXX, XXXXXX X
04/14/2008 Deed XXXX XXXX XXXXX XXXX, XXXXXX X
12/06/2007 Deed XXXX, XXXXXX X XXXX, XXXXXX X
11/16/2006 Deed XXXX, XXXXXX XXXX XXXX XXXXX
08/14/2006 Deed XXXXXXXXX, XXXXXX X XXXX, XXXXXX X
05/05/1999 Deed XXXXXXXXX XXXXX XXXXXXXXX, XXXXXX X
06/25/1998 Deed XXXXXXXXX, XXXXXX X XXXXXXXXX XXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 4204 Gem 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
Property tax
$7,271
Tax per sq. ft.
$4
Recent tax assessments
Market value
$624,673
Land value
$167,323
Building value
$457,350

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 $624,673 1.164 $7,271 +0.69%
2024-2025 $612,426 1.1791 $7,221 -48.84%
2023-2024 $600,421 2.3508 $14,115 +101.36%
2022-2023 $588,648 1.1908 $7,010 +2.51%
2021-2022 $577,111 1.1848 $6,838 +2.29%
2020-2021 $571,195 1.1703 $6,685 +1.20%
2019-2020 $544,998 1.212 $6,605 +11.58%
2018-2019 $490,198 1.2077 $5,920 +2.65%
2017-2018 $480,588 1.2001 $5,768 +18.55%
2016-2017 $471,165 1.0326 $4,865 -5.16%
Permits

Permit information for 4204 Gem Avenue, Castro Valley, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
09/07/2018

*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 4204 Gem 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)
Marshall Elementary School 9 Public K-5 491 0.05
Early Bird Montessori School NR Private PK, K-1 30 0.38
Early Bird Montessori School NR Private PK, K-1 30 0.38
Redwood Christian Elementary School NR Private K-5 282 0.65
Vannoy Elementary School 7 Public K-5 441 0.67
Castro Valley Adult And Career Education NR Public 0 0.72
Redwood Christian Schools NR Private K-12 706 0.73
Alma Preschool NR Public 52 0.75
Independent Elementary School 8 Public K-5 634 0.80
Special Education-Preschool-Laurel NR Public 1 0.83
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Creekside Middle School 8 Public 6-8 760 0.24
Castro Valley Adult And Career Education NR Public 0 0.72
Redwood Christian Schools NR Private K-12 706 0.73
Alma Preschool NR Public 52 0.75
Special Education-Preschool-Laurel NR Public 1 0.83
Canyon Middle School 6 Public 6-8 1,332 0.87
Northstar School NR Private PK-8 152 0.93
Our Lady Of Grace School NR Private K-8 218 0.99
Anchor Education, Inc. NR Private 3-12 18 1.40
Sterling West San Francisco Campus NR Private 3-11 27 1.41
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Castro Valley Adult And Career Education NR Public 0 0.72
Redwood Christian Schools NR Private K-12 706 0.73
Alma Preschool NR Public 52 0.75
Castro Valley High School 9 Public 9-12 2,799 0.82
Special Education-Preschool-Laurel NR Public 1 0.83
Anchor Education, Inc. NR Private 3-12 18 1.40
Sterling West San Francisco Campus NR Private 3-11 27 1.41
Anchor Education, Inc. School NR Private 3-12 0 1.41
Stellar Preparatory High School NR Private 9 0 1.54
Redwood Continuation High School 3 Public 9-12 122 1.76

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

Neighbors for 4204 Gem Avenue, Castro Valley, CA

4247 Gem Ave, Castro Valley 4288 Gem Ave, Castro Valley 4207 Gem Ave, Castro Valley 20055 Onyx CT, Castro Valley 20076 Onyx CT, Castro Valley 20054 Onyx CT, Castro Valley 4210 Gem Ave, Castro Valley 20022 Topaz CT, Castro Valley 4253 Gem Ave, Castro Valley 4226 Gem Ave, Castro Valley 4238 Gem Ave, Castro Valley 20059 Garnet CT, Castro Valley 20057 Topaz CT, Castro Valley 20056 Topaz CT, Castro Valley 4272 Gem Ave, Castro Valley 3940 Castro Valley Blvd, Castro Valley 4216 Gem Ave, Castro Valley 4222 Gem Ave, Castro Valley 4232 Gem Ave, Castro Valley 4292 Gem Ave, Castro Valley

Nearby ZIP codes for 4204 Gem 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 4204 Gem Avenue, Castro Valley, CA 94546?

The development at 4204 Gem Avenue, Castro Valley, CA 94546 was built in 1947.

What is the total square footage of 4204 Gem Avenue, Castro Valley, CA 94546?

4204 Gem Avenue, Castro Valley, CA 94546 has a total of 1,978 square feet.

When was 4204 Gem Avenue, Castro Valley, CA 94546 last sold and what was the sale price?

4204 Gem Avenue, Castro Valley, CA 94546 was last sold on 02/10/2014 for $455,000.

What is the assessed value of 4204 Gem Avenue, Castro Valley, CA 94546?

4204 Gem Avenue, Castro Valley, CA 94546 is currently assessed at $624,673.

What are the property taxes for 4204 Gem Avenue, Castro Valley, CA 94546?

The property taxes for 4204 Gem Avenue, Castro Valley, CA 94546 total $7,271.

How many residential units does this building have?

This building has 2 residential unit(s).

Disclaimer

Copyright 2003-2026 by PropertyShark.com

All data comes from government sources. No attempt has been made to validate it. No attempt has been made to validate the accuracy of the programming of this website.

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.

Sign up for a free account