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    King County, WA Quadplexes for Sale

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    Remodeled Four-Unit Quadplex
    Updated: Aug 26
    Remodeled Four-Unit Quadplex

    4617 S 189th St, Seatac, WA 98188

    $1,799,948
    3,960 sqft
    Four‑unit building with 3,960 square feet, built in 1970
    Each residence includes three bedrooms and open‑concept living space
    Comprehensive renovation with new electrical, plumbing, and mini‑split systems
    One ADA‑compliant unit included
    Upper units have private balconies; lower units feature covered patios
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    Updated 4-Unit Apartment Property
    Updated: Aug 15
    Updated 4-Unit Apartment Property

    3838 D Pl SE, Auburn, WA 98002

    $1,100,000
    3,840 sqft
    Four 2‑BD/1‑BTH units, each measuring 960SF
    3,840‑square‑foot multifamily property built in 1981
    Interior renovations completed in 3/4 units
    Private patio or balcony and fireplace in every unit
    Full‑sized washer and dryer in each residence
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    Four-Unit Apartment Building
    Four-Unit Apartment Building

    3842 D Pl SE, Auburn, WA 98002

    $950,000
    3,840 sqft

    Corner-lot property with private outdoor space, fireplaces, and full-size washer and dryer sets in every residence.

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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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    Four-Unit Quadplex with Fireplaces
    Four-Unit Quadplex with Fireplaces

    34005 1 St Cir S, Federal Way, WA 98003

    $990,000
    3,904 sqft

    Each residence offers two bedrooms, one-and-a-half baths, laundry equipment, and a covered parking space.

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    Renovated Quadplex with Studio Unit
    Renovated Quadplex with Studio Unit

    6635 Carleton, Seattle, WA 98108

    $1,399,000
    2,910 sqft

    Renovated quadplex features one studio and three 1–2 bedroom units with updated kitchens and modern fixtures.

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    Fully Occupied Four-Unit Quadplex
    Fully Occupied Four-Unit Quadplex

    34019 1st Circle S, Federal Way, WA 98003

    $799,000
    2,712 sqft

    Professionally managed multifamily property with a varied unit mix, private outdoor areas, and covered parking.

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    Well-Maintained 4-Plex with Garages
    Well-Maintained 4-Plex with Garages

    903 31ST, Auburn, WA 98002

    $1,000,000
    3,806 sqft

    Fully occupied 4-plex with townhome-style layouts, each unit featuring 2 bed/1 bath and a 1-car garage.

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    Remodeled 4-Unit Quadplex
    Remodeled 4-Unit Quadplex

    701 Kenyon Street, Seattle, WA 98108

    $975,000
    2,880 sqft

    Unit mix includes three two-bedroom apartments and one one-bedroom apartment, each with one full bath.

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    4-Unit Quadplex with Garages
    4-Unit Quadplex with Garages

    911 30th St NE, Auburn, WA 98002

    $1,249,000
    3,806 sqft

    Fully occupied four-unit property with individual garages, laundry, and on-site parking.

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    Four-Unit Multifamily Property
    Four-Unit Multifamily Property

    2657 Thorndyke, Seattle, WA 98199

    $1,192,000
    2,880 sqft

    Three units are leased, while one remains vacant for showing and leasing flexibility.

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    Fourplex with Private Balconies
    Fourplex with Private Balconies

    34214 1st Place S, Federal Way, WA 98003

    $899,950
    3,056 sqft

    Four independently served units each offer 2 bedrooms, 1 bathroom, and in-unit washer and dryer.

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    Renovated Four-Unit Property
    Renovated Four-Unit Property

    4206 Dayton Ave N, Seattle, WA 98103

    $2,450,000
    35,020 sqft

    Grandfathered multifamily asset with two two-bedroom units, two studios, off-street parking, and extensive building-wide improvements.

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    Managed 4-Unit Quadplex
    Managed 4-Unit Quadplex

    120 S 339th Cir, Federal Way, WA 98003

    $1,200,000
    3,600 sqft

    On-site property management is in place for all units.

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    Updated Four-Unit Apartment Building
    Updated Four-Unit Apartment Building

    4811 S 252nd Pl, Kent, WA 98032

    $900,000
    2,980 sqft

    Recent upgrades include building systems, roofing, and interior finishes.

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    Updated Quadplex with New Roof
    Updated Quadplex with New Roof

    4809 S 252nd Pl, Kent, WA 98032

    $900,000
    2,760 sqft

    Four-unit income property with refreshed building systems and modernized interior finishes.

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    Four-Unit Multifamily Property
    Four-Unit Multifamily Property

    27 S 342nd Pl, Federal Way, WA 98003

    $1,200,000
    3,600 sqft

    Income-producing residential property with on-site management and access to bus, light rail, shopping, dining, and major roadways.

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    Four-Unit Quadplex with Laundry
    Four-Unit Quadplex with Laundry

    2250 I St NE, Auburn, WA 98002

    $900,000
    3,000 sqft

    Fully rented quadplex with assigned parking and a community coin-operated laundry room.

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    Well-Maintained Fourplex with Tile Roof
    Well-Maintained Fourplex with Tile Roof

    34120 1st Place S, Federal Way, WA 98003

    $899,000
    3,600 sqft

    Fourplex with four spacious 2-bedroom, 1-bath units and a tile roof replacement completed in 2022.

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    Four-Unit Quadplex
    Four-Unit Quadplex

    136 McKean Ct, Enumclaw, WA 98022

    $1,150,000
    4,092 sqft

    Each residence includes two bedrooms, one-and-a-half bathrooms, in-unit laundry, and a private outdoor area.

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    Multi-Family
    Multi-Family

    812 29th Ave S, Seattle, WA 98144

    $2,200,000
    6,400 sqft

    Multifamily properties · 6,400 SF

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    Fourplex with Alley Parking
    Fourplex with Alley Parking

    2021 15TH, Seattle, WA 98144

    $1,395,000
    4,230 sqft 0.12 AC lot

    Four-unit property with varied layouts, an updated kitchen, and gated backyard access.

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    Four-Unit Quadplex with Views
    Four-Unit Quadplex with Views

    604 W Kinnear Pl, Seattle, WA 98119

    $4,200,000
    5,430 sqft

    Upgraded residences feature private balconies, gas fireplaces, premium appliances, and in-unit laundry.

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    4-Unit Quadplex Property
    4-Unit Quadplex Property

    120 339TH, Federal Way, WA 98003

    $1,200,000
    3,600 sqft

    On-site management covers all four units, supporting streamlined day-to-day operations.

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    Four-Unit Quadplex with On-Site Management
    Four-Unit Quadplex with On-Site Management

    27 342ND, Federal Way, WA 98003

    $1,200,000
    3,600 sqft

    1979 multifamily property near transit, retail, dining, and major regional routes.

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    King County, WA Quadplexes Market Trends and Statistics

    Explore 45 quadplexes for sale in King County, WA, showcased through 45 active listings on our real estate platform. These investment opportunities span a total of 169,026 square feet of properties for sale, with an estimated market value of $54,777,346.

    Sale prices for four-unit buildings in King County, WA start at $799,000, averaging $1,369,433, and reaching up to $4,200,000 — 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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