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    King County, WA Triplexes for Sale

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    24 properties
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    Triplex with Northwest-Facing Decks
    Updated: Oct 13
    Triplex with Northwest-Facing Decks

    3438 14th Avenue W, Seattle, WA 98119

    $1,100,000
    Three apartments, all currently occupied
    Four parking stalls with alley access
    330 SF basement for flexible storage
    6,000 SF lot zoned LR1(M)
    Standing metal roof and copper plumbing
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    Updated Triplex with Private Outdoor Spaces
    Updated: Sep 18
    Updated Triplex with Private Outdoor Spaces

    5208 Sand Point Way NE, Seattle, WA 98105

    $1,649,500
    3,510 sqft
    3,510 SF triplex with 3BD/1.75BA, 2BD/1BA, and 1BD/1BA units
    Fresh exterior paint completed in 2025
    Each unit includes a private entrance, in‑unit laundry, fireplace, gas heating, and outdoor space
    Single‑car garages serve the two larger units
    Fenced backyard with rear‑gate access
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    Triplex with Private Decks
    Triplex with Private Decks

    2551 13TH, Seattle, WA 98119

    $1,250,000
    2,720 sqft 0.11 AC lot

    Three residences offer varied bedroom counts, west-facing outdoor space, shared laundry, and on-site parking.

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    Renovated Mixed-Use Investment Property
    Renovated Mixed-Use Investment Property

    11427 Rainier Avenue South, Seattle, WA 98178

    $1,995,000
    6,440 sqft

    Turnkey mixed-use building offers four NNN commercial units and three renovated one-bedroom apartments with current full occupancy.

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    Triplex with Skyline Views
    Triplex with Skyline Views

    1001 1ST, Seattle, WA 98109

    $1,600,000
    3,000 sqft

    Three separately entered apartments include private decks, a coin-operated laundry room, and off-street parking.

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    Triplex with Six-Car Parking
    Triplex with Six-Car Parking

    1145 N 93rd St, Seattle, WA 98103

    $995,000
    2,940 sqft

    LR3-zoned triplex with fireplaces, in-unit laundry, decks, and tandem off-street parking.

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

    4815 S Holly St, Seattle, WA 98118

    $1,300,000
    2,635 sqft 0.22 AC lot

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

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    Turnkey Ballard Triplex
    Turnkey Ballard Triplex

    6301 22nd Ave NW, Seattle, WA 98107

    $1,499,900
    2,880 sqft

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

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    Triplex with In-Unit Laundry
    Triplex with In-Unit Laundry

    5444 Kirkwood Pl N, Seattle, WA 98103

    $999,999
    1,470 sqft

    Three residential units include dedicated washer and dryer appliances.

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    Remodeled Waterfront Triplex
    Remodeled Waterfront Triplex

    1768 Alki Ave SW, Seattle, WA 98116

    $1,295,000
    2,100 sqft

    Three residences include studio, one-bedroom, and two-bedroom layouts with two units currently leased.

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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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    3-Unit Triplex with Patio Spaces
    3-Unit Triplex with Patio Spaces

    3831 17th Ave SW, Seattle, WA 98106

    $769,000
    1,900 sqft

    Dishwashers, washers and dryers, plus patio and yard areas, serve the residential units.

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    Mixed-Use Property with Retail
    Mixed-Use Property with Retail

    305 65TH, Seattle, WA 98115

    $1,650,000
    3,250 sqft 0.12 AC lot

    Combines an operating retail business with three housing units in Seattle’s Green Lake neighborhood.

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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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    80-Unit Multifamily Assemblage
    80-Unit Multifamily Assemblage

    431 14th Ave, Seattle, WA 98112

    $22,000,000
    0.60 AC lot

    Four contiguous parcels combine an operating apartment property with a triplex and two detached houses.

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    Queen Anne View Triplex
    Queen Anne View Triplex

    1001 1st Avenue N, Seattle, WA 98109

    $1,600,000

    Three independently entered apartments include private outdoor space, laundry, parking, and individual storage lockers.

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    Updated Triplex with Parking
    Updated Triplex with Parking

    1522 Taylor Ave N, Seattle, WA 98109

    $1,575,000

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

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

    1322 S Bayview, Seattle, WA 98144

    $1,999,000

    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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    Based on your search, we've compiled Potential Opportunities for your consideration. Besides 24 Active Listings in King County, WA

    King County, WA Triplexes Market Trends and Statistics

    Explore 24 triplexes for sale in King County, WA, showcased through 24 active listings on our real estate platform. These investment opportunities span a total of 64,909 square feet of properties for sale, with an estimated market value of $51,637,399.

    Sale prices for three-family homes in King County, WA start at $769,000, averaging $2,245,104, and reaching up to $22,000,000 — 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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