Duplex

Contra Costa County, CA Duplexes for Sale

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Two-Unit Residential Income Property
Updated: Apr 16
Two-Unit Residential Income Property

709 W 8Th St, Antioch, CA 94509

$600,000
1,952 sqft 0.11 AC lot
Two‑unit property built in 1950
Public water service
Stucco construction
Indoor laundry rooms in both units
Large, open kitchens in both units
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709 W 8Th St, Antioch, CA 94509

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Lafayette Duplex with Attached ADU
Updated: May 28
Lafayette Duplex with Attached ADU

3692 Sundale, Lafayette, CA 94549

$1,675,000
3,282 sqft 0.23 AC lot
Largest Lafayette duplex setup with 2430 SF main unit plus an attached 854 SF 2 bed/1 bath ADU
Cosmetically refreshed with new interior paint, flooring, and inset lights; hardwood flooring in the main unit upper level and throughout the ADU
Bathroom upgrades noted from 2022 to 2026
Heating includes gravity; cooling includes central air plus window/wall AC units
Fireplace present; includes storage and a back yard
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Dual-Residence Duplex Estate
Dual-Residence Duplex Estate

1009 - 1011 Froyd Rd, Concord, CA 94521

$1,499,000
3,384 sqft 0.65 AC lot

Turnkey two-home property with fully remodeled interiors and private decks for flexible multi-generational or rental use.

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Duplex with Vacant Move-In Unit
Duplex with Vacant Move-In Unit

3008 Center Avenue, Richmond, CA 94804

$589,000
1,614 sqft 0.12 AC lot

One unit is vacant and move-in ready, supporting owner-occupancy while the other unit provides rental income.

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Richmond Duplex: Investment and Living
Richmond Duplex: Investment and Living

1003-1011 Lassen St, Richmond, CA 94805

$750,000
1,332 sqft 0.11 AC lot

Well-maintained Richmond duplex with income potential and updated features.

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Mixed-Use Residential Beer Garden Property
Mixed-Use Residential Beer Garden Property

809 W 2Nd St, Antioch, CA 94509

$800,000
2,773 sqft 0.16 AC lot

Mixed-use property with two residential units and a ground-floor beer garden on a 5-year lease beginning May 2024.

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Main Home With Independent Guest House
Main Home With Independent Guest House

1746 Agadir Ct, Concord, CA 94518

$999,000
1,923 sqft 0.17 AC lot

Updated home with a 3-bedroom main residence and a self-sufficient one-bedroom guest house with separate entrance.

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Walnut Creek Multifamily with ADU
Walnut Creek Multifamily with ADU

1465 Cortez Ct, Walnut Creek, CA 94598

$1,650,000
2,606 sqft 0.12 AC lot

Multifamily property with assumable low-interest loan and ADU.

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Renovated 2-Unit Residential Income
Renovated 2-Unit Residential Income

423 Silver Ave, Richmond, CA 94805

$690,000
1,974 sqft 0.17 AC lot

Completely renovated duplex with two 3-bedroom, 1-bath units, each with appliances and in-unit laundry.

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Classic Spanish-Style Duplex with Patios
Classic Spanish-Style Duplex with Patios

1532 Mariposa St, Richmond, CA 94804

$695,000
1,630 sqft 0.11 AC lot

Well-maintained duplex with two separate units, private entries, garages, and outdoor space—ready for immediate occupancy or rental.

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Luxury Duplex with Two Residences
Luxury Duplex with Two Residences

1009 - 1011 Froyd Rd, Concord, CA 94521

$1,499,000
3,384 sqft 0.65 AC lot

Two fully remodeled homes offer separate living with modern interiors, fireplaces, private garages, and upgraded electrical and windows.

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Two-Unit Duplex with Private Entrances
Two-Unit Duplex with Private Entrances

1003-1011 Lassen St, Richmond, CA 94805

$750,000
1,332 sqft

Well-maintained duplex with two separate 2-bedroom, 1-bath units, each with its own entrance, garage, laundry area, and private backyard.

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

809 W 2Nd St St, Antioch, CA 94509

$800,000

Ground-floor beer garden plus two rental residences on a double lot, offering diversified income in Downtown Antioch.

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Spanish Style Duplex with Private Garages
Spanish Style Duplex with Private Garages

1532 Mariposa St, Richmond, CA 94804

$695,000
1,630 sqft

Move-in ready duplex with separate entries, garages, and private outdoor space in a Richmond Annex setting.

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Based on your search, we've compiled 14 Potential Opportunities for your consideration. Besides 14 Active listings in Contra Costa County, CA, we suggest exploring several alternatives:

Contra Costa County, CA Duplexes Market Trends and Statistics

Explore 14 duplexes for sale in Contra Costa County, CA, showcased through 14 active listings on our real estate platform. These investment opportunities span a total of 28,816 square feet of properties for sale, with an estimated market value of $12,891,000.

Sale prices for duplexes in Contra Costa County, CA start at $589,000, averaging $991,615, and reaching up to $1,675,000 — 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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