Castro Valley, CA Duplexes for sale

Updated: Aug 31

Duplex with Private Garages

20275 Stanton Ave, Castro Valley, CA 94546

$999,000

1,680 sqft 0.11 AC lot

Two 2‑bedroom, 1‑bathroom units within a 1,680‑square‑foot duplex
Private one‑car garage and driveway parking for each residence
Front unit has been recently remodeled
Rear unit includes a private backyard for gardening or outdoor use
Built in 1937 on a 0.1148‑acre parcel

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Updated: Jul 24

Two-Unit Duplex with Detached Garage

20843 Chester St, Castro Valley, CA 94546

$1,409,800

1,590 sqft 0.26 AC lot

Approximately 1,590 square feet of living area on a 0.26‑acre lot
Unit mix includes one 2‑bedroom, 1‑bath unit and one 1‑bedroom, 1‑bath unit
Detached 2‑car garage plus storage improvements
Alameda County Planner indicates the lot can potentially accommodate 5 Accessory Dwelling Units
Walking distance to schools, shops, restaurants, BART, and public transportation

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Remodeled Duplex with Cottage ADU

4231 Somerset Ave, Castro Valley, CA 94546

$999,950

1,285 sqft 0.12 AC lot

Updated primary residence with a separately fenced detached cottage, private outdoor space, and flexible additional living accommodations.

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Scored against comparables nationwide. These are worth a look.

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Two-Unit Duplex with Garages

Castro Valley, CA 94546

$999,000

Remodeled front residence and private rear-unit backyard add distinct features to this established income property.

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Based on your search, we've compiled 8 Potential Opportunities for your consideration. Besides 4 Active listings in Castro Valley, CA, we suggest exploring several alternatives: 4 properties in Nearby Cities

Opportunities in Nearby Cities

Here are 4 Similar properties we found in Nearby Locations for your consideration.

Duplex With Detached Two-Car Garage

15291-15293 Central Avenue, San Leandro, CA 94578

$799,000

1,760 sqft

Updated two-unit property with separate utility metering, one vacant residence, and one occupied unit.

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Detached Duplex Compound

21492 Montgomery Avenue, Hayward, CA 94541

$1,100,000

1,908 sqft 0.34 AC lot

Two residences offer separate utilities, newer roofs, indoor laundry, and convenient access to Hayward BART.

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Duplex with Private Garages

San Leandro, CA 94578

$508,000

1,600 sqft

San Leandro duplex with two tenant-occupied 2BR/1BA units, each with a private enclosed garage and a large shared yard.

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Two-Unit Spanish-Style Duplex

1245 Cotter Way, Hayward, CA 94541

$875,000

Two residences share one parcel, with an extensively improved main home and a recently refreshed rear unit.

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Castro Valley, CA Duplexes Market Trends and Statistics

Explore 4 duplexes for sale in Castro Valley, CA, showcased through 4 active listings on our real estate platform. These investment opportunities span a total of 4,555 square feet of properties for sale, with an estimated market value of $4,407,750.

Sale prices for duplexes in Castro Valley, CA start at $999,000, averaging $1,101,937, and reaching up to $1,409,800 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

Neighborhood	Average Price
94546	$1.1M

Neighborhood

Average Price

94546

$1.1M