Property Details
4102 100th Avenue SE, Mercer Island, WA 98040
Mercer Island, WA 98040
$8,998,000
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About This Home
A Modern Craftsman has come available on the desirable north end! Offering 90 feet of sparkling waterfront, a boater's dream dock & an unforgettable beachside guest house, this exceptional property is set on a 1/2 acre of richly manicured grounds w/ a pancake flat lawn stretching right to the water's edge. Inside, experience timeless architectural detail…chubby triple crown molding, board-and-batten 3/4 wainscot, an absolute exquisite level of craftsmanship awaits. Entertain in the Epicurean's dream kitchen where a massive island anchors the rm, offering space for gathering, prepping & entertaining. Flow seamlessly into the Great Rm, where an entire window wall & double sets of French doors open, blurring the line between the outdoors & the in. A separate upper wing hosts an expansive office/apartment suite w/ kitchenette ideal for work, guests, or multigenerational living. Retreat to the main flr primary, a sanctuary in itself, w/ stunning views & bath area reminiscent of a Four Seasons spa. The lower level unfolds into a wonderland of space w/ 3 bdrms (1 an ensuite), exercise + big bonus/billiard rm. At the shoreline, discover a charming 1-bdrm beachhouse w/ upper view loft that could be the perfect music rm, office or art studio. Control 4 smart home. 3 laundry rms. 5 bdrm/4.5 bth, 5,535 sf main house, 1 bdrm/1bth, 950 sf casita. With a 3-car garage, generous auto court & newer boat ready dock, you'll never want to leave. Welcome home to the ultimate in wtrfrnt living!
Property Details
Property Information
Property Type
Residential
Subtype
Single Family Residence
Status
Active
County
King
Neighborhood
North End
Listed
Apr 7, 2026
Interior Features
Bedrooms
5
Bathrooms
5.0
Half Baths
1
Living Area
5,535 sq ft
Basement
Daylight, Finished
Interior Features
Second Kitchen, Bath Off Primary, Built-In Vacuum, Dbl Pane/Storm Window, Dining Room, Fireplace, French Doors, High Tech Cabling, Loft, Pantry, Security System, Skylight(s), SMART Wired, Sprinkler System, Vaulted Ceiling(s), Walk-In Closet(s), Water Heater, Wine Cellar, Wine/Beverage Refrigerator
Exterior & Lot
Lot Size
0.51 sqft
Year Built
2010
Exterior Materials
Stone, Wood
Parking
Attached Garage, RV Parking
Sewer
Sewer Connected
Water Source
Public
Lot Features
Dead End Street, Paved
Exterior Features
Stone, Wood
Location
City
Mercer Island
County
King
Coordinates
47.57257, -122.20421
Schools
School District
Mercer Island
Elementary School
Buyer To Verify
Middle School
Islander Mid
High School
Mercer Isl High
Additional Information
Tax Year
2025
Annual Taxes
$41,749
Possession
Array
Inclusions
Dishwasher(s),Double Oven,Dryer(s),Garbage Disposal,Microwave(s),Refrigerator(s),Stove(s)/Range(s),Washer(s)
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Estimated Monthly Payment
$0
Provided by Beyond Real Estate, LLC
Down Payment Assistance Available
This property may qualify for homebuyer assistance programs
Find out if you’re eligible for down payment assistance programs that could help make this home more affordable. Programs can provide thousands of dollars toward your down payment and closing costs.
Check Your EligibilityBased on information submitted to the MLS GRID as of April 8, 2026 10:45 PM. 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.
IDX information is provided exclusively for consumers’ personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Copyright 2026 NWMLS. All rights reserved.
IDX information is provided exclusively for consumers’ personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Copyright 2026 NWMLS. All rights reserved.
