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    King County, WA Triplexes for Sale

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    Occupied Triplex with Alley Parking
    Updated: Jul 15
    Occupied Triplex with Alley Parking

    3438 14th Avenue W, Seattle, WA 98119

    $1,150,000
    Three occupied units with in‑unit laundry
    Four parking stalls accessed from a private dead‑end alley
    330 SF flexible basement for additional storage
    LR1(M) zoning on a 6,000 SF lot
    Standing metal roof and copper plumbing
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    Renovated Mixed-Use Investment Property
    Updated: Jun 3
    Renovated Mixed-Use Investment Property

    11427 Rainier Avenue South, Seattle, WA 98178

    $1,995,000
    6,440 sqft
    6,440 SF mixed‑use building on 5,700 SF of land in Seattle, WA
    4 ground‑floor commercial units with NNN leases
    3 second‑floor one‑bedroom apartment units, 100% occupied
    Fully stabilized with all 7 units currently 100% occupied
    Comprehensive renovation completed in 2020: new roof and wood siding facade, remodeled apartments with updated kitchens and in‑unit laundry
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    Updated 3-Unit Triplex
    Updated 3-Unit Triplex

    12317 35th Ave NE, Seattle, WA 98125

    $1,216,800
    3,300 sqft

    Three-bedroom residences offer separate laundry, individual utility responsibility, and seven off-street parking spaces.

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    See what stands out in King County

    We check every for-sale listing in the county against comparable properties across the country. Most price about where you would expect. A few are worth a second look.

    We check every listing here. A few are worth a second look.

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    Occupied Triplex with Off-Alley Parking
    Occupied Triplex with Off-Alley Parking

    4207 S Bateman Street, Seattle, WA 98118

    $860,000
    2,740 sqft

    Fully occupied multifamily property with a two-bedroom-type mix, in-unit appliances, air conditioning, and documented maintenance history.

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    Townhome-Style Triplex in Meadow Brooke Estates
    Townhome-Style Triplex in Meadow Brooke Estates

    1019 18th St NE, Auburn, WA 98002

    $935,000
    3,560 sqft

    Well-maintained triplex with strong tenancy in a desirable location.

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    Brick Triplex with Two-Car Garage
    Brick Triplex with Two-Car Garage

    4815 Holly, Seattle, WA 98118

    $1,300,000
    3,200 sqft 0.22 AC lot

    Three two-bedroom residences offer multifamily functionality with parking, storage, and yard space.

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    Triplex With Storage
    Triplex With Storage

    14001 35TH, Seattle, WA 98125

    $1,100,000
    5,220 sqft

    Three-unit residential property with access to neighborhood retail, transit, and outdoor recreation.

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    Occupied Triplex with Private Parking
    Occupied Triplex with Private Parking

    3438 14th Ave W, Seattle, WA 98119

    $1,150,000
    3,110 sqft 0.14 AC lot

    Three occupied units feature in-unit laundry, northwest-facing decks, and access to four parking stalls.

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    Updated Triplex with Parking
    Updated Triplex with Parking

    1522 Taylor, Seattle, WA 98109

    $1,575,000
    2,920 sqft

    Updated units include in-unit laundry, dedicated parking, and mini-split systems in the owner's residence.

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    Turnkey Ballard Triplex
    Turnkey Ballard Triplex

    6301 22nd Avenue NW, Seattle, WA 98107

    $1,599,950
    3,030 sqft

    Remodeled triplex with three 2BR/1BA units and a fourth remodeled unit needing permits to be legalized.

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    Triplex with Redevelopment Permits
    Triplex with Redevelopment Permits

    118 27TH, Seattle, WA 98144

    $1,150,000
    1,570 sqft 0.11 AC lot

    Existing triplex on a corner lot with separate meters, supporting interim income while an 8-unit townhouse project advances with the city.

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    Mixed-Use Corner Development Building
    Mixed-Use Corner Development Building

    45 Tolt Ave, Carnation, WA 98014

    $950,000
    11,455 sqft 0.35 AC lot

    Permit-ready mixed-use building with retail, office space, and apartments plus on-site parking for multiple revenue streams.

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    Renovated Triplex with Parking
    Renovated Triplex with Parking

    812 E Gwinn Pl, Seattle, WA 98102

    $1,375,000
    3,580 sqft

    Owner-occupiable property with updated systems, outdoor space, storage, and dedicated electric parking.

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    Mostly Completed 3-Unit Condo
    Mostly Completed 3-Unit Condo

    A-12017 5th Ave Sw, Seattle, WA 98104

    $950,000
    3,776 sqft

    Mostly completed future 3-unit condominium with plans for SFR plus ADA unit and DADU, sold as-is.

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    Triplex with Detached Accessory Dwelling Unit
    Triplex with Detached Accessory Dwelling Unit

    228 21st Avenue E, Seattle, WA 98112

    $1,900,000

    2024 triplex with detached DADU featuring mini-splits, solar panels, and full appliance packages.

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    Legal Triplex with Shared Laundry
    Legal Triplex with Shared Laundry

    267 E Newton St, Seattle, WA 98109

    $1,149,000

    For sale triplex in Seattle, configured as a legal triplex with shared storage and laundry space.

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    Mixed-Use Property with Triplex
    Mixed-Use Property with Triplex

    1322 S Bayview, Seattle, WA 98144

    $2,100,000

    A sanctuary with classrooms, kitchen, and an attached three-unit residential component.

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    North Beach Ballard Triplex
    North Beach Ballard Triplex

    9922 Triton Dr NW, Seattle, WA 98117

    Contact for pricing
    2,903 sqft

    Triplex with Sound and Olympic views in North Beach.

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    Lake-View Triplex
    Lake-View Triplex

    2215 Yale Avenue, Seattle, WA 98102

    $1,475,000

    Three-unit property with decks, a patio, and a townhouse-style penthouse featuring an office loft.

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    Brick Triplex With Attached Garage
    Brick Triplex With Attached Garage

    921 N 85th Street, Seattle, WA 98103

    $1,250,000

    Three-unit property with updated roof, in-unit laundry, hardwood flooring, and fenced outdoor space.

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    Fully Occupied Triplex with Development Zoning
    Fully Occupied Triplex with Development Zoning

    1409 NW 54th St, Seattle, WA 98107

    Contact for pricing
    0.11 AC lot

    Triplex currently fully rented on a lot zoned IG2-U65, allowing industrial unlimited with use and height limits.

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    Triplex with Rooftop Deck
    Triplex with Rooftop Deck

    132 30th Ave, Seattle, WA 98122

    Contact for pricing

    Two-level penthouse includes a flexible office and elevated water views.

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    Upgraded Triplex with Off-Street Parking
    Upgraded Triplex with Off-Street Parking

    1812 N 40th St, Seattle, WA 98103

    Contact for pricing

    Each unit offers 3 bedrooms and 1 bathroom with off-street parking for three vehicles.

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    Queen Anne Triplex with Water Views
    Queen Anne Triplex with Water Views

    634 W Nickerson St, Seattle, WA 98119

    Contact for pricing

    Three-unit residential income property near Seattle Pacific University with access to major Seattle employment centers and neighborhoods.

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    King County, WA Triplexes Market Trends and Statistics

    Explore 29 triplexes for sale in King County, WA, showcased through 29 active listings on our real estate platform. These investment opportunities span a total of 56,804 square feet of properties for sale, with an estimated market value of $25,180,750.

    Sale prices for three-family homes in King County, WA start at $860,000, averaging $1,325,302, and reaching up to $2,100,000 — 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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