What makes a house a duplex?

A duplex is a residential property with two living units. They usually have one owner but can be occupied by two households. Owners have the option to live in one unit and rent out the other, rent out both, or occupy both units.

What is the difference between a simplex and a duplex?

Simplex townhouses refer to properties in sectional title developments constructed on a single level. Duplex refers to properties stacked one above the other and is also the sectional title.

What's the difference between a duplex, a condo, and a townhouse?

The main difference between duplexes, condos, and townhouses is who owns the units. Both units in a duplex (and all three in a triplex, all four in a quadplex, etc.) are owned by a single owner, whereas the units in a condo are owned by individual owners and common structural elements and amenities have shared ownership. Duplexes are similar to townhomes in that both share a connecting wall with another home and have their own individual exterior entrances, but townhouses have different owners, and many townhouses are sold as if they are condos and thus are also subject to similar shared ownership rights and responsibilities for certain shared structures such as roofs and utility connections. Because of the singular owner, the units in a duplex would not generally be subject to the rules and regulations of a homeowner's association the way condos and townhouses would be (although depending on the neighborhood, all the properties in the area including the duplex as a whole may be part of an HOA, such as in a planned neighborhood development).

What are some benefits to buying a duplex?

Turning one (or both) of the units into income-generating rental property can help offset the cost of a mortgage, which may make it more affordable to buy and live in one unit of a duplex than buying and living in a single-family home You may be able to earn tax deductions for repairs and maintenance made to the income-generating rental unit, whereas you would not be able to do so for repairs you make to your own single-family home The multi-family nature of a duplex may be an ideal arrangement if you want to live close to family and relatives while maintaining some degree of privacy and separation of households

What are some risks to buying a duplex?

Depending on the market, a duplex is likely to be more expensive than a single-family home If you turn one or both units into income-generating rental property, you are responsible for landlord- required repairs, whereas you have the choice to defer repairs in your single-family home A weak rental market and/or difficulty finding tenants can make it more difficult to afford your mortgage payment If you live in one unit and another household lives in the other, there will be less privacy

How many duplex-for-sale are for sale in King County, WA?

There are 251 Duplex currently for sale in King County, WA.

Duplex Homes for Sale in King County, WA

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Browse duplexes and duplex homes for sale in King County, WA.
A duplex is a multifamily residential property with two living units. The units typically either share a wall (arranged side-by-side) or a ceiling/floor (one on top of the other). The units each have their own individual entrances and do not have an interior connection. Exterior spaces such as backyards or the driveway may be shared, depending on how the property is arranged. Crucially, both units have the same owner and are on the same lot/parcel. Owners have the option to live in one unit and rent out the other, rent out both, or occupy both units.

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Showing 1 - 20 of 251 Homes

5 bed • 2.5 bath • 3130 sqft • First time on the market in years. vintage duplex with a great capitol hill location, blocks to washington and volunteer parks, eats and shopping. easy to freeways. two units, 1 with a three bedrooms and the other with two bedrooms. great opportunity for a great investment.

Listing provided by NWMLS

4 bed • 2 bath • 2540 sqft • Excellent ballard/crown hill location. duplex is close to grocery stores, cafes, coffee shop and more. all duplexes live like a home, units are side by side, each with two floors. rapid ride bus stop on the same block. these duplexes are on a flat lot with alley access and off-street parking, zoned nc2-55. many updates have been completed; value can be added with more updates or as a development opportunity incorporating both lots (see mls 1721328), market rents are $1995+.

Listing provided by NWMLS

4 bed • 2 bath • 2540 sqft • Excellent ballard/crown hill location. these two duplexes are close to grocery stores, cafes, coffee shop and more. all duplexes live like a home, units are side by side, each with two floors. rapid ride bus stop on the same block. these duplexes are on a flat lot with alley access and off-street parking, zoned nc2-55. many updates have been completed; value can be added with more updates or as a development opportunity incorporating both lots (see mls 1721347). current rents are well below market, pro-forma rents used $3990.

Listing provided by NWMLS

6 bed • 5.5 bath • 2580 sqft • Alki beach waterfront duplex! this waterfront duplex on beach drive (with three kitchens - all with separate entries) is a rare offering! the lower duplex unit is a total of 1720 sq.ft. on 2 levels with 2 bedrooms, 2 baths, large waterfront patio, with laundry and a second kitchen & separate entry on lower level; upper unit is 860 sf., 2 bed, 1 bath, a large view deck & laundry. close to bus lines, several parks, alki beach and the alaska junction! the seawall/bulkhead for this property was recently updated for added peace of mind! make your waterfront investment dreams come true! aloha from alki!

Listing provided by NWMLS

6 bed • 3 bath • 2340 sqft • Build now, final permits in hand! renovated duplex w/stable cash flow and fully permitted for two additional townhouses! located in opportunity zone for significant tax benefits. existing duplex fully renovated. long term tenants w/no vacancy or turnover in 3 years. main level unit (a) features 4 br, 2 ba, kitchen w/ stainless steel appliances, and w/d. upper unit (b) features 2 br, 1 ba, kitchen w/ stainless steel appliances & w/d. additional land in rear of lot; final permits received from city of seattle to build two 4 bedroom townhomes for substantial value enhancement. pricing is derived from 6.0% cap rate on existing duplex, plus $100k land value for each townhouse unit. duplex next door at 9257 51st ave s (mls # 1723062) also listed.

Listing provided by NWMLS

4 bed • 1.5 bath • 2820 sqft • Conveniently located home in wonderful vibrant community! large 2700+ square foot home features open floor plan with all new windows for tons of natural light! charming, vintage home features, such as coved ceilings and arched entry ways. 4 large bedrooms, 2 on main floor & 2 upstairs along with half bath. kitchen w/ lovely eating space, corner windows, and opens to huge deck. large basement is accessed from interior and/or exterior, perfect for adding more bedrooms or converting to mil/duplex/triplex or leave as large bonus room. newer hardwood floors, and newer windows. walking distance to schools, & mins from freeways, downtown, & more! great opportunity for multi-family buyers!

Listing provided by NWMLS

4 bed • 2 bath • 3355 sqft • Attention investors! duplex in hip columbia city with views of lake washington and mountains! 2 units with vintage charm. hardwood flooring with double-paned windows, 1,000 sq ft basement with w/d, shop and storage. 2-car garage with alley access. each unit accessible from front and rear of property. near light rail, farmer's market, lake washington, parks, library, restaurants, shops and express metro bus!

3924 S Angeline Street

Seattle, WA

$849k

5 days ago

Listing provided by NWMLS

3 bed • 2 bath • 1660 sqft • One of two mid-century duplexes, side by side, on large ~7500 sf lot. hardwood floors, original condition w/charm intact. great location-just blocks to alaska st junction, whole foods & trader joe's, and fairmount park elementary. seller prefers to sell concurrently with adjacent property at 5045-5047 fauntleroy way sw. lr1 zoning for future development, or keep as longterm investment or owner occupied duplex(es).

5039 Fauntleroy Way SW

Seattle, WA

$875k

1 month ago

Listing provided by NWMLS

3 bed • 2 bath • 1660 sqft • One of two mid-century duplexes, side by side, on large ~7800 sf lot. hardwood floors, original condition w/charm intact. great location-just blocks to alaska st junction, whole foods & trader joe's, and fairmount park elementary. seller prefers to sell concurrently with adjacent property at 5039-5041 fauntleroy way sw. lr1 zoning for future development, or keep as longterm investment or owner occupied duplex(es).

5045 Fauntleroy Way SW

Seattle, WA

$875k

1 month ago

Listing provided by NWMLS

9 bed • 1.5 bath • 2780 sqft • Prime location! this turnkey renovated duplex is centrally located and minutes to downtown, seattle u, providence med center, capitol hill & more. two units, including spacious six bedroom, two bath apartment plus three bedroom, one bath unit are fully occupied, bringing in $8895/mo in gross income. both units have refinished hardwood floors, updated kitchens and baths, new interior paint, light fixtures and more. off street parking accessed from the alley. two car garage fronts cherry.

Listing provided by NWMLS

3 bed • 2 bath • 1377 sqft • Huge versitility and oppourtunity in this downtown duplex. can be used as residential duplex, or live in one side and run your business out of the other. how's that for a short commute? skylights, full bath, newer floors and paint in both units. unit b features updated kitchen. great location close to downtown renton, the landing, boeing, new satori elementary school, lowes, uwajimaya, coulon park, lake washington, 15 minutes to airport or downtown bellevue and much more. don't miss out on this rare oppourtunity!

214 Park Avenue N #A&B

Renton, WA

$500k

2 months ago

Listing provided by NWMLS

3230 40th Avenue SW, Seattle, WA, 98116,

Today @ 08:00 PM - 11:00 PM

5 bed • 2.75 bath • 3606 sqft • This duplex boasts an english-like tranquil surrounding and classic interior. located in one of the most desirable neighborhoods of west seattle. hardwood floors, three levels. add square footage to the duplex by finishing the basement and add a dadu in the back! this investment's value add is substantial! on a large lot with 2 car garage and ample off street parking, the possibilities are endless. owner occupy and rent out additional unit(s) or add units and rent as a very profitable investment. huge potential awaits you for this move in ready and value add opportunity!

Listing provided by NWMLS

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Duplex Homes for Sale in King County, WA | 251 Duplexes and Duplex Houses in King County, WA for Sale | ZeroDown

Duplex Homes for Sale in King County, WA

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Frequently Asked Questions for Duplex Homes for Sale in King County, WA

What makes a house a duplex?

What is the difference between a simplex and a duplex?

What's the difference between a duplex, a condo, and a townhouse?

What are some benefits to buying a duplex?

What are some risks to buying a duplex?

How many duplex-for-sale are for sale in King County, WA?

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