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    Contra Costa County, CA Duplexes for Sale

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    Duplex with Detached Residences
    Updated: Sep 15
    Duplex with Detached Residences

    363-365 Pinole Ave, Rodeo, CA 94572

    $649,000
    984 sqft 0.20 AC lot
    Two detached residences, each with 2 bedrooms and 1 bathroom
    0.2032‑acre parcel
    Primary home at 365 Pinole Ave has an attached one‑car garage
    Updated kitchen and new luxury vinyl plank flooring in the primary residence
    Access to Highway 4 and Highway 80
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    Corner-Lot Duplex with Garages
    Updated: Sep 18
    Corner-Lot Duplex with Garages

    569 18th Street, Richmond, CA 94801

    $599,000
    1,544 sqft 0.11 AC lot
    1,544‑square‑foot side‑by‑side duplex on a 0.1148‑acre corner lot
    Each unit has a private backyard with direct access
    Detached garage provides one garage space per unit
    Each unit also includes an additional driveway parking spot
    Long‑term tenants are already in place
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    Detached Two-Home Duplex
    Detached Two-Home Duplex

    946 Hough Avenue, Lafayette, CA 94549

    $1,695,000
    1,890 sqft 0.29 AC lot

    Two single-level residences provide separate living areas, kitchens, and private outdoor spaces on one Lafayette lot.

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    Single-Story Duplex
    Single-Story Duplex

    2313 Manzanita Way, Antioch, CA 94509

    $650,000
    1,963 sqft 0.16 AC lot

    Both residences are leased and have received interior or system updates in recent years.

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    Duplex with Attached Garages
    Duplex with Attached Garages

    2313 Manzanita WAY, Antioch, CA 94509

    $650,000
    1,963 sqft 0.16 AC lot

    Two occupied residences have single-level layouts, with garage space available for parking and storage.

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    Duplex with Attached Garages
    Duplex with Attached Garages

    1299 Sheppard Ct, Walnut Creek, CA 94598

    $1,448,000
    2,958 sqft 0.20 AC lot

    Both residences offer indoor laundry, vaulted ceilings, and a private yard.

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    Duplex with Private Backyards
    Duplex with Private Backyards

    Oak Grove Rd 1950 & 1952, Walnut Creek, CA 94598

    $1,300,000
    2,758 sqft 0.22 AC lot

    One residence is vacant, while the other is tenant-occupied, offering flexibility in how the property is used.

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    Two-Story Duplex with Strait Views
    Two-Story Duplex with Strait Views

    722-724 Edwards St, Crockett, CA 94525

    $609,000
    1,462 sqft

    Two residential units offer vintage character, private laundry rooms, storage, and access to landscaped outdoor space.

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    Duplex With Attached ADU
    Duplex With Attached ADU

    3692 Sundale, Lafayette, CA 94549

    $1,595,000
    3,282 sqft 0.23 AC lot

    Main residence and accessory apartment support flexible rental, household, or home-office arrangements.

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    Duplex with Vacant Unit
    Duplex with Vacant Unit

    3008 Center Avenue, Richmond, CA 94804

    $589,000
    1,614 sqft 0.12 AC lot

    Two-unit property with one residence ready for occupancy and a second unit suited for rental use.

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    Duplex with Attached Garages
    Duplex with Attached Garages

    1299 Sheppard Ct, Walnut Creek, CA 94598

    $1,448,000
    2,958 sqft

    Income property with two residences, private yards, indoor laundry, and convenient access to transit, shopping, trails, and downtown Walnut Creek.

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    Historic Duplex
    Historic Duplex

    213 Nicholl Ave, Richmond, CA 94801

    $729,900
    1,836 sqft 0.06 AC lot

    Both residences are occupied, with public water and sewer serving the property.

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    Three-Story Townhome Development and Rentals
    Three-Story Townhome Development and Rentals

    230 Cleaveland rd, Pleasant Hill, CA 94523

    $1,689,999
    2,799 sqft 0.43 AC lot

    Planned unit development site with rental income and approved townhome plans featuring attached garage parking.

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    Duplex with Large Yard
    Duplex with Large Yard

    2344 Scenic Ave, Martinez, CA 94553

    $577,000
    1,637 sqft

    Two-level configuration includes a city-certified lower studio and an upper residence with a scenic outlook.

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    Updated Duplex with Detached Unit
    Updated Duplex with Detached Unit

    2024 Thompson Ln, El Sobrante, CA 94803

    $999,000
    2,892 sqft 0.31 AC lot

    Two residences provide separate entrances, utility metering, and flexible occupancy arrangements.

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    Two-Unit Duplex with Basement
    Two-Unit Duplex with Basement

    29 Solano Ave, Bay Point, CA 94565

    $859,000
    2,562 sqft 0.16 AC lot

    Two detached residences provide separate living areas, with a seven-bedroom, four-bathroom configuration across the property.

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    Remodeled Duplex with ADU Plans
    Remodeled Duplex with ADU Plans

    1377 Monterey St, Richmond, CA 94804

    $798,800
    1,241 sqft

    Two renovated residences include separate utilities, detached garage access, and permit-ready plans for a detached ADU.

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    Two-Unit Duplex with Side Yard
    Two-Unit Duplex with Side Yard

    619 2nd St, Richmond, CA 94801

    $665,000
    1,657 sqft 0.09 AC lot

    Each residence offers two bedrooms and one bathroom, with convenient access to transit, schools, groceries, and regional routes.

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    Duplex With Attached Garage
    Duplex With Attached Garage

    2048-2050 Donald Dr, Moraga, CA 94556

    $1,350,000
    1,620 sqft

    Two-unit residential property with fenced exterior space, private parking, and in-unit laundry equipment.

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    Mixed-Use Property with Beer Garden
    Mixed-Use Property with Beer Garden

    809 W 2Nd St, Antioch, CA 94509

    $800,000
    2,773 sqft

    Two updated residential units complement leased ground-floor commercial space in a flexible income-producing configuration.

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    Detached Duplex with Attached Garage
    Detached Duplex with Attached Garage

    365 Pinole Ave, Rodeo, CA 94572

    $649,000
    0.20 AC lot

    Two separate residences share a large parcel, with an updated primary home and a second unit suited for renovation.

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    Duplex with Long-Term Tenants
    Duplex with Long-Term Tenants

    2217 Manzanita Way, Antioch, CA 94509

    $649,999
    2,072 sqft

    Two occupied units offer a two-bedroom layout, with one including one-and-a-half baths.

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    Updated Duplex With Detached Unit
    Updated Duplex With Detached Unit

    El Sobrante, CA 94803

    $930,000

    Two separate homes offer flexible living arrangements, independent utilities, and distinct access points on an expansive residential lot.

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    Detached Two-Home Duplex
    Detached Two-Home Duplex

    946 Hough Avenue, Lafayette, CA 94549

    $1,695,000

    Separate residences offer private outdoor areas and flexible occupancy options on one parcel.

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    Contra Costa County, CA Duplexes Market Trends and Statistics

    Explore 35 duplexes for sale in Contra Costa County, CA, showcased through 35 active listings on our real estate platform. These investment opportunities span a total of 44,465 square feet of properties for sale, with an estimated market value of $32,603,698.

    Sale prices for two-family homes in Contra Costa County, CA start at $495,000, averaging $931,534, and reaching up to $1,695,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

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    Featured Contra Costa County Real Estate Agencies

    Realmo connects you with licensed Contra Costa County CRE brokers providing property specifications, local market pricing, and commercial transaction underwriting support.

    Security Pacific Real Estate
    3223 Blume Drive Richmond, CA 94806
    Phone: 15106628502
    www.spre.com
    Keller Williams Realty Danville
    760 Camino Ramon, Suite 200 Danville, CA 94526
    Phone: 19258558333
    www.kwdanville.com
    Village Associates Real Estate
    93 Moraga Way, Suite # 103 Orinda, CA 94563
    Phone: 19252540505
    www.villageassociates.com
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