Duplex Homes for Sale in King County, WA

Q: 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.

Q: What are some advantages to buying a duplex?

Renting out part or all of your duplex can result in tax deductions, access to multi-family financing, and rental income pays for your investment.

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

There are 66 Duplex currently 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 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.

Washington

Greater Seattle

King County

Showing 1 - 18 of 66 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.

10 bed • 9 bath • 5710 sqft • Two special kirkland duplex's for sale on one tax lot, street addresses for the duplexes are 11918 & 11920. if the buyer is an owner occupied and qualifies, there is owner occupied financing available for the entire complex. one duplex was built in 2017; both units are three bedroom townhouses with garages and with roof top decks with views of lake washington. the 2nd duplex was updated with a new roof and siding in 2017. walk to juanita beach and shopping, historic vacancy rate for the past four years has been zero.

11918 100 Avenue NE #A

Kirkland, WA

$2.6m

3 days ago

3 bed • 2 bath • 1620 sqft • Recent city up zone to c1-55 to allow 5 stories with commercial/retail/multi-family in prime location just north of aurora bridge with pedestrian overpass on the corner. original 1925 brick craftsman house is a good candidate for redevelopment w/ legal duplex rental income. possible views of city, lake union & mt. rainier at higher elevations. frontage to major arterial, access to city center, zoning & neighborhood amenities makes this a great investment. walk score is 91!! located 1 block to fremont shopping & parks.

4 bed • 3 bath • 1886 sqft • Fantastic opportunity for builders & investors! large corner lot w/ an alley in a prime location. property is a duplex. multiple exit plans possible per city of seattle buyer to verify to buyer's own satisfaction the following: 1) rehab property & continue to use as duplex (adding up to 500 sqft could be possible w/ this option, 2) tear down property & rebuild a duplex (per specific time lines), 3) tear down property & build a sfr w/ up to 1000 sqft aadu plus 1000 sqft dadu.

6 bed • 3 bath • 2340 sqft • Builder alert! 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 with 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 5.75% cap rate on the existing duplex, plus $100k land value for each townhouse unit. duplex next door at 9257 51st ave s (mls # 1723062) also listed for sale.

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!

6 bed • 2 bath • 2400 sqft • Investor alert !!! solid duplex, each unit has three bedrooms and one bath. newer roofs, washer/dryers and plenty of parking with upside on rents. conveniently located 10 minutes from downtown seattle with views of the valley. income is pro-forma. interior showings with mutually accepted offer . this single listing is also available with listing # 1730382 four duplex assemblage .

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. brand new furnace, hardwood floors, and newer windows. walking distance to schools, & mins from freeways, downtown, & more! great opportunity for multi-family buyers!

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.

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!

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

29 days ago

4 bed • 3 bath • 2400 sqft • Traditional seattle duplex. great location close to meadowbrook community center and beach. walking distance to shopping and transit. needs some tlc for instant equity. town home style with 1.5 bath. lots of parking with yard space.

4 bed • 4 bath • 2680 sqft • 2 duplexes 909 & 913 on 2 lots. great potential here! total 11,537 sqft lot zoned nc340. urban village. value in land. 2nd lot parcel id 7608700026. parcels #'s 7608700026 & 7608700025

4 bed • 2 bath • 1460 sqft • Amazing opportunity and prime location! great cash-flowing duplex with development potential to build 2 more units with existing duplex or 4 brand new homes! initial feasibility studies completed/transferred with sale to buyer including architectural drawings, drainage and tree study, et. al. 0.33 acres, zoned r-14. desirable mf location in up and coming renton highlands. rents under market. tenants pay all utilities and law maintenance. lt tenants on m-to-m lease. willing to sign lt leases. collect cash while you obtain permits to build, newer roof 2016/2017. buyer to verify. being sold as-is.

2 bed • 1 bath • 680 sqft • Investor alert - value in land! property zoned for mrd (multi-residential-duplex). existing home has tenants for income during early planning stages. convenient access to 167hwy and 5 minutes away from kent station. sold as-is. (buyer to verify all information)

10 bed • 5 bath • 4920 sqft • Renovated duplex w/ stable tenancy & cash flow. convenient location off rainier ave, proximate to transit. tenants are long term with no vacancy or turnover in 3 years. 5.81% cap rate on in-place net operating income. both units fully renovated. upper unit (a) features 5 large bedrooms, 2 full bathrooms, large living room w/ hardwood flooring, large balcony overlooking lake washington, kitchen w/ stainless steel appliances, and washer/dryer. lower unit (b) features 5 bedrooms, kitchen w/ stainless steel appliances, living room, covered wrap-around patio, bonus room, & washer/dryer. garage for additional storage & 2 tandem parking spaces. side sewer recently replaced. duplex next door at 9253 51st ave s (mls # 1723071) also listed for sale.

2 bed • 2 bath • 1660 sqft • Rare opportunity to own a duplex in the queen anne interbay neighborhood. easy access to downtown, expedia, spu, ballard & slu. great walkability to cafes, restaurants, whole foods. potential to add bedroom to the main floor unit. potential for added income with increased rents. listed for below appraisal price! see supplements for appraisal.

7 bed • 3.5 bath • 3420 sqft • 3-unit assemblage consisting of a legal duplex and a 3bed/1.5 bath sfr home on separate, adjacent parcels. located just 3 blocks off lake union in a very desirable area. this is an incredibly unique investment opportunity with lots of options. as-is, a stable income-producing property that brings in close to $9,000/month. as a future development, you have a combined 7,413 sqft lr3-zoned lot for 8-10 townhomes or a 20+ unit apartment with city/lake views. both homes have been very well-maintained with many recent upgrades including kitchen and bath remodels, flooring, interior/exterior paint, newer roof, etc. minutes from slu, fremont, and downtown; this is a high-demand rental with low vacancy. 3d virtual tour available on listing.

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