Island Property FOR SALE
Septic Permit issued by King County Public Health: 24 December 2025.
Septic install completed: Friday, 16 January 2026.
King County Inspection approved: Tuesday, 27 January 2026
NWMLS Parcel #322303-9155 Click here
2 Houses. 2 Separate Addresses. Main 883 sqft + DADU 366 sqft = 1249 sqft. 1 Parcel. <1/3 Acre.
Vashon Island… a short ferry ride from Seattle (King County), Tacoma (Pierce County), or the Key Peninsula (Kitsap County).
100-year-old homes. Two separate addresses. Shared water. Shared septic.
View the new Septic design —> Brand new, state-of-the-art, OSCAR XO2
Transforming this island property—with brand new 4-bedroom OSS—offers long term peace of mind.
Two 1,000 gal tanks piped to Oscar XO2 Drainfield. Install completed 16 January 2026
Oscar XO2 Drainfield install completed January 2026. These purple hoses carry reclaimed, recycled wastewater. I call these “purple hula hoops” “soaker hoses” as they slowly—with an even release—disperse treated wastewater into an engineered sand media bed (“sand pit”). They are essentially perforated distribution tubing. Additional layers of sand will cover following inspection, which passed on 27 January 2026. 
Approximately 1/3 acre parcel just minutes from favorite island beaches, trails, amenities, and the north end ferry to Seattle. 
Prior to the new septic install: Fence removed. Patio removed. Lawn dug up. Prior 750-gal grandfathered concrete septic tank decommissioned. Entire backyard has been dug up and prepared for the new two 1000-gal tanks buried under the ground (lounge chair and fence posts as visual markers) with the OSS components connecting the plumbing under the house's slab (entrance near back door.) 
Blank slate for next buyers to implement your vision for landscaping, gardening, and planting! The possibilities are endless! - 30 January 2026 (scroll down for more "before photos" for inspiration!)
For the past 19 years, this property has been lovingly cared for and enjoyed as a main residence, personal retreat haven, Airbnb, Furnished Finder stay, and long-term rental. With a proven track record as a successful short-term rental, it generated over $30,000 in gross receipts in 2024 from Airbnb alone. Both homes have been thoughtfully managed as either short- or long-term rentals, with the seller maintaining Superhost status on Airbnb for the past eight years. Each home has earned the coveted distinction of Guest Favourite—recognized by Airbnb as “one of the most loved homes according to guests.”
Brand new, state-of-the-art, OSCAR XO2 septic system now scheduled for late December installation.
By Appointment Only (206) 679-1389
Call, text, WhatsApp, or email:
By Appointment Only (206) 679-1389
Karen du Four des Champs, Seller
Aerial view looking east. 1.7 miles to closest public beach, KVI. Photos by Clarity Northwest Photography.
Aerial view looking south. The main house (18115) east-facing. Hot tub on deck along south border. DADU (18111) separated by bamboo fencing for added privacy, looks west, facing horse pasture. Meditation hut in SW corner.
UPDATES to photos at time of original MLS listing: Concrete patio removed to expose new path for the septic tanks. Red sheds and raised vegetable bed removed to accommodate new Oscar XO2 drainfield. New black shed placed at end of L shape front driveway.
“In 2006, on a drizzling February day so typical of the Pacific Northwest, I stepped into this home and was immediately greeted by light streaming through the west-facing windows and skylights above. In that instant, I knew this would be my new home. With a tenant in the cabin and a third of an acre to shape into perennial beds, vegetable gardens, and outdoor living spaces, I could already see the possibilities unfolding—this would be my “base” on Vashon Island, no matter where my work carried me. Over the years, I have delighted in bringing those visions to life: hosting gatherings, creating a retreat haven for clients, designing an outdoor massage space for those seeking renewal, welcoming solo travelers, offering a quiet, contemplative sanctuary for couples wishing to reconnect, and nurturing long-term tenants. Each step has been the manifestation of a dream, transforming possibility into lived reality.”
883 sqft
2 bedrooms, 1 full bath (walk-in closet in main bedroom)
Open concept with vaulted ceilings
Skylights in LR and bathroom
Bank of windows bringing in the Western sun
East-facing, full kitchen
W/D, dishwasher, new water heater (2024)
East-facing expansive front porch
5-person Hot Spring Prodigy jacuzzi hot tub (purchased March 2004) with steps and private deck
366 sqft legal, nonconforming DADU * (cabin aka cottage aka “MiKo’s Guest House”)
1 bedroom, 1 bath (shower with mini tub)
Warm wooden interior with high ceilings
Skylight in bathroom
Full kitchen
Cozy wood stove
New water heater (2025)
Private retreat-like setting
Adjacent to 10-acre horse pasture
Western exposure
*as per letter from King County DDES Land Use dated Sept 2011
Property Features
Shy 1/3 acre lot. 1 Parcel. (cannot be divided)
1 Water District #19 water share services both residences*
Grandfathered shared septic system (King County re-approved June 6, 2025)
Both structures built in 1925 - Historic charm
40 feet and bamboo privacy fencing separates the 2 homes
High-speed internet - eero across entire property
Google camera mounted on main house’s front porch
Certified Wildlife Habitat
Mature, organic perennial gardens
Less than 1 mile to the town of Vashon, amenities
Near schools, pools, athletic club, sandy beaches
Nearby unpublished meandering trail off Soper Road
Fruits trees (apple, crabapple)
Berry bushes (strawberries, blackberry, raspberry)
Meditation hut
Western light exposure
Brand-new, state-of-the-art Oscar XO2 Septic System scheduled for install November 2025.
King County Certificate of Water Availability states “the existing connection supports two residences, 18115 &18111 Beall Road SW,” signed by Water District #19 GM” June 2025
By Appointment Only (206) 679 -1389
