Whatcom County, WA Duplexes for sale

Updated: Sep 1

New Construction Duplex with Garages

110 Baker Street # A & B, Everson, WA 98247

$874,500

3,388 sqft

New construction completed in 2025
Two 1,694‑square‑foot units; 3,388 square feet combined
Each unit has 3 bedrooms, 2.5 baths, and a flexible upper‑level loft or bonus room
Quartz countertops, stainless steel appliances, and luxury vinyl plank flooring
Three mini‑split systems per unit provide AC and heat

View details

Updated: Aug 29

Two-Story Duplex with Private Patios

2828 2830 Valencia St, Bellingham, WA 98226

$660,000

2,176 sqft

2,176 SF duplex built in 1992
Two 1,088 SQFT units, each with 2 bedrooms and 2 bathrooms
Two‑story floor plans with a bedroom and bathroom on each level
Private patios and lawn areas for both residences
Covered parking, storage shed access, and laundry areas

View details

Two-Story Duplex with Covered Parking

2818 Valencia St 2816, Bellingham, WA 98226

$625,000

2,216 sqft

Both residences include private outdoor space and dedicated laundry utility rooms.

View details

See what stands out in Whatcom 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.

Cap Rate available after sign in

NOI available after sign in

Local Demand available after sign in

Two-Unit Duplex with Private Entrances

541 545 D St, Blaine, WA 98230

$515,000

1,410 sqft

Tenant-occupied property with covered carports, storage rooms, and a partially fenced yard.

View details

Duplex with Remodeled Unit

401 N 9th Street A & B, Lynden, WA 98264

$785,000

2,892 sqft

Two three-bedroom residences offer open living areas, in-unit laundry, storage, and private outdoor space.

View details

Duplex with Private Baths

1406 Franklin, Bellingham, WA 98225

$950,000

3,455 sqft

Fully occupied duplex with two residential sides, in-unit laundry, private bathrooms, and off-street parking.

View details

Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center

Remodeled Duplex with Two Units

1007 22nd St, Bellingham, WA 98225

$599,900

1,456 sqft

Updated upper and lower residences include separate entrances, complete appliance packages, and shared laundry equipment.

View details

Occupied Two-Unit Duplex

2210 Wilson Ave, Bellingham, WA 98225

$695,000

2,272 sqft

Two tenant-occupied residences include private outdoor areas, in-unit laundry, storage, and separate parking.

View details

Duplex with Attached Garages

517 Colton, Everson, WA 98247

$865,000

2,994 sqft

Two contemporary residences offer open layouts, upgraded finishes, and private fenced outdoor areas.

View details

Duplex with Two-Car Garages

2316 Xenia St, Bellingham, WA 98229

$795,000

2,470 sqft

Two residential units each provide three bedrooms, two bathrooms, and a two-car garage.

View details

Renovated Duplex with Townhouse Units

1100 23RD, Bellingham, WA 98225

$899,000

1,848 sqft

Two fully renovated units feature covered decks, quartz countertops, fireplaces, and in-unit laundry.

View details

Duplex with Recent Roof

1826 Valencia St, Bellingham, WA 98229

$825,000

2,900 sqft 0.19 AC lot

Matching two-story units combine residential layouts with private laundry, fireplaces, and outdoor living areas.

View details

Duplex with Three-Bay Shop

7380 Woodland, Ferndale, WA 98248

$925,000

2,722 sqft

Single-story primary home with a two-bedroom, two-bath accessory dwelling unit and multiple outdoor improvements.

View details

Craftsman Duplex with Two-Car Garage

1405 Foxtail St Unit A & B, Lynden, WA 98264

$899,000

4,264 sqft

Two well-appointed residences offer open interiors, private outdoor areas, and convenient in-unit laundry.

View details

Multi-Family

151 Bay Lyn Dr, Lynden, WA 98264

$1,149,000

2,804 sqft

Duplexes · 2,804 SF

View details

Updated Duplex

3261 Hollywood Ave, Bellingham, WA 98225

$615,000

1,440 sqft

Extensive recent improvements include roofing, appliances, flooring, insulation, paint, and crawl-space work.

View details

Duplex Property Assembly

610 Mead, Everson, WA 98247

$3,871,669

1.49 AC lot

Multi-building residential income property with renovated units, newer construction, garages, and dedicated parking.

View details

Duplex with One-Bedroom ADU

3216 Edwards Street, Bellingham, WA 98229

$900,000

Two residences include an updated main home and a zero-step-entry accessory dwelling unit.

View details

Duplex with Detached Garage-Shop

5331 Evergreen Dr, Bellingham, WA 98226

$750,000

Attached two-bedroom unit, expansive grounds, and a separate garage-shop provide residential flexibility and substantial storage.

View details

Whatcom County, WA Duplexes Market Trends and Statistics

Explore 19 duplexes for sale in Whatcom County, WA, showcased through 19 active listings on our real estate platform. These investment opportunities span a total of 40,707 square feet of properties for sale, with an estimated market value of $18,198,069.

Sale prices for duplexes in Whatcom County, WA start at $515,000, averaging $957,793, and reaching up to $3,871,669 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.