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A brick fourplex and a duplex on a Capitol Hill side street in Seattle

Seattle, WA · 2–4 unit multifamily

Seattle duplexes, triplexes and fourplexes for sale

104 active NWMLS listings right now · 120 closed in the last 12 months at a median $1.02M. Refreshed hourly.

See the listingsWhat is my building worth?

This page lists every Seattle NWMLS listing filed as Residential Income with two, three or four units, refreshed hourly. 120 such buildings closed in Seattle in the last twelve months at a median $1,020,000 ($409 per square foot, 37 median days on market). Small multifamily is valued on the actual rent roll and on these closings; RexMont underwrites with its property-management team, which runs buildings like these in Seattle, and lists them with the rent roll, leases and permit file prepared.

Adriano ToriWritten by Adriano Tori, Founder & Designated Broker · WA Lic. #27660Reviewed 2026-10-231,244+ five-star Google reviews

The last 12 months

What duplexes, triplexes and fourplexes sold for in Seattle, Oct 2025 to Oct 2026

Every closed NWMLS sale of duplexes, triplexes and fourplexes in Seattle in the window, compiled by RexMont from the listing records. This is the comparable set a buyer should be offering against and a seller should be pricing from.

Closed sales
120
Median price
$1.02M
Median $/sq ft
$409
Median days on market
37
Sale-to-list
97.2%
Sold at or over asking
36.7%

Sales by price

  • Under $750K19
  • $750K–$1M38
  • $1M–$1.5M41
  • $1.5M–$2M14
  • $2M–$3M5
  • $3M+3

Where they sold (NWMLS area)

  • Ballard/Greenlake35
  • Queen Anne/Magnolia21
  • West Seattle18
  • Central Seattle16
  • North Seattle13
  • Southeast Seattle12

Duplexes 61, triplexes 45, fourplexes 14. Range $600K to $6.32M; median home 2,630 sq ft, median year built 1942.

Information and statistics derived from Northwest Multiple Listing Service. Window Oct 2025–Oct 2026; refreshed monthly.

How this market works

What a Seattle duplex, triplex or fourplex buyer is really buying

Seattle's duplexes, triplexes and fourplexes are where owner-occupants become landlords: a two-to-four-unit building finances like a house, the other units' rents count toward the loan, and the owner lives in one door while the building pays for itself. They are also the inventory that small investors compete for, because five units and up means commercial lending.

I buy and sell these buildings on the actual numbers. The rent roll and the leases, not the pro-forma; the permitted unit count, not the one in the listing; the roof, sewer and electrical service as one building, not four homes. Seattle's rental rules (registration, just-cause eviction, first-in-time, the 180-day rent-increase notice) and Washington's 2025 rent-stabilization law go into the underwriting, and RexMont's property-management team reviews the leases with you.

Seattle's middle-housing code now allows up to four homes on most residential lots, so a duplex on a large lot in a good location can carry development value beyond its rents. When we list one, we price both.

New listing alerts

New Seattle 2–4 unit buildings, the day they list.

Add an email and a RexMont agent sends each new Seattle duplex, triplex or fourplex listing as it hits the NWMLS, with the rent roll requested the same day.

Watching: Seattle 2–4 unit Residential Income listings

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Seattle duplexes, triplexes and fourplexes for sale right now

Active NWMLS listings of duplexes, triplexes and fourplexes in Seattle (104 active). Refreshed hourly.

See every listing →

Based on information submitted to the MLS GRID as of October 23, 2026 at 2:25 AM PT (date and time MLS GRID Data was obtained). All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

Listing information courtesy of Northwest Multiple Listing Service (NWMLS). The listing data relating to real estate for sale on this web site comes in part from the Northwest Multiple Listing Service. Real estate listings held by brokerage firms other than RexMont Real Estate are marked with the “Listing courtesy of NWMLS” designation. Information provided is for the consumer’s personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Some IDX listings have been excluded from this website.

© 2026 Northwest Multiple Listing Service. All rights reserved. Listing information deemed reliable but not guaranteed.

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Where to look

Where Seattle's small multifamily is

Capitol Hill and the Central District

Brick fourplexes and converted mansions of the 1900s–1920s on the streetcar grid; the densest stock of 2–4 unit buildings in the city.

Ballard, Fremont and Wallingford

1920s duplexes and 1960s–70s four-unit walk-ups a short walk from the commercial strips; strong rents, strong competition.

Beacon Hill, Columbia City and Rainier Valley

Duplexes and triplexes near the light-rail stations, where cap rates are highest and the middle-housing code opens the most lots.

West Seattle

Post-war duplexes and small fourplexes in the Junction, Admiral and Delridge; the light-rail extension is the long-term story.

University District and Roosevelt

Student-rental triplexes and fourplexes near the UW and the Roosevelt station; vacancy follows the academic calendar.

North Seattle

Lake City, Northgate and Greenwood: 1960s–80s buildings with the most room in the price, close to the Northgate station.

Before you write

What to check before buying a Seattle 2–4 unit building

Rent roll and leases, not pro-forma

Value the building on the rents it collects today, the lease terms and the deposits held, then on comparable sales. A pro-forma is a hope.

Permitted units

A fourplex with a fifth basement unit is a fourplex with a problem. Match the unit count to the permit and assessor records before you price it.

Seattle's rental rules in the numbers

RRIO registration, just-cause eviction, first-in-time screening, 180-day rent-increase notice and Washington's 2025 rent-stabilization limits all belong in the underwriting. RexMont's property-management team reviews them with buyers.

Owner-occupied financing

Living in one unit opens conventional and FHA loans with low down payments and lets a share of the other rents count toward qualifying; that is how many Seattle investors buy their first building.

Zoning and the lot

Seattle's middle-housing code allows up to four homes on most residential lots and more near frequent transit; a duplex on a large lot may carry development value beyond its rents.

The systems are shared

One roof, one sewer line, often one boiler and one electrical service for several households. Inspect them as a building, and budget reserves as a landlord.

Selling

Selling a duplex, triplex or fourplex in Seattle?

The buyers for a duplex, triplex or fourplex search for exactly this page, and they compare your home with the closings listed above, not with the city median. RexMont prices from this set, prepares the file the buyer's inspector and lender will ask for, and markets to the audience that is already looking.

Adriano Tori, RexMont's founder and designated broker, prepares the value personally for every home in this niche: the closings, the current competition, and the number that gets the home sold, in writing, within one business day.

Your buyers are comparing you with the 120 duplexes, triplexes and fourplexes that closed in Seattle in the last 12 months, median $1.02M.

What is my duplex, triplex or fourplex worth?

Adriano ToriPrepared by Adriano ToriFounder & Designated Broker · WA Lic. #27660

A written value within one business day.

The address, your timing, and anything you want us to know. Adriano prepares the value from the Seattle duplexes, triplexes and fourplexes closings and sends it in writing.

Your request goes to Adriano Tori and the RexMont team. No obligation, no automated estimate.

Common questions

Seattle duplexes, triplexes and fourplexes FAQ

What is on this page?
Every NWMLS listing in Seattle filed as Residential Income with two, three or four units: duplexes, triplexes and fourplexes, plus the twelve months of closings behind them. Five-plus-unit buildings are commercial listings and are not here.
How do I finance a Seattle duplex, triplex or fourplex?
Two to four units can be financed like a house: a conventional loan or an FHA loan with a low down payment if you live in one unit, and investor financing at a higher down payment if you do not. Lenders count a share of the rent from the other units toward qualifying. Five units and up is commercial lending.
What Seattle rental rules apply to a small multifamily owner?
Seattle requires rental registration (RRIO), just-cause eviction, first-in-time tenant screening, 180 days' notice for rent increases, and relocation assistance in some cases; Washington's 2025 rent-stabilization law limits annual increases on most existing rentals. None of this stops a well-run building from performing; all of it belongs in the numbers before you write. RexMont's property-management team runs small buildings in Seattle and reviews leases and rent rolls with buyers.
How do I value a Seattle fourplex?
On income and on comparable sales. Gross rent multiplier and cap rate from the actual rent roll (not pro-forma), then the price per unit and per square foot from the closings on this page. Deferred maintenance, below-market leases and unpermitted units move the number more than the neighborhood does.
Can I add units to a Seattle lot?
Seattle's middle-housing code (adopted 2025 under HB 1110) allows up to four homes on most residential lots, more near frequent transit and with affordable units, and the city has allowed two ADUs per lot since 2019. A duplex on a large lot may carry development value beyond its rents; your agent checks the zoning and the lot before you price it.

Buying

Talk to a Seattle duplex, triplex or fourplex specialist before you tour.

Tell us the budget and the sub-market, and whether you are buying only or selling first. A RexMont agent who works this niche sets the call, with the current listings and the twelve-month closings already pulled.

Talk to a duplex, triplex or fourplex specialist

Budget, timing, the area you want. We set the call.

Your request goes to the RexMont team. No obligation.

Keep going

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