Property Details
4102 100th Avenue SE
Mercer Island, WA 98040
$8,495,000
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About This Home
Get on the lake this summer and jump into one of the best waterfront investment opportunities on Lake Washington. This Northend Retreat showcases 90 ft of shoreline, a pancake flat lawn, a newer dock, and a guest house at the water’s edge. Inside, craftsmanship reigns w/triple crown molding + rich millwork & board & batten details. An epic Great Room awaits, flowing effortlessly through a fully opening retractable window wall & triple sets of French doors to multiple deck spaces & a covered outdoor living area w/ TV, frplc and built in BBQ. At its heart sits an Epicurean kitchen—a true command center for serious cooking & unforgettable gatherings. Private upper wing hosts an apartment suite w/ kitchenette ideal for work or multigenerational living. Retreat to the main flr primary, a sanctuary in itself, w/ soaring ceilings, stunning views, his/hers closets & its own laundry. 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 beach house w/ upper view loft that could be the perfect art studio or massive storage space for all of the outdoor toys. 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
Jun 22, 2026
Structure Type
House
Parcel Number
4131900045
Tax & HOA
Annual Property Tax
$41,749 (2025)
Est. Monthly Tax
$3,479/mo
Interior Features
Bedrooms
5
Bathrooms
4.3
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
Community & Access
Directions
From E Mercer Way, turn onto 100th Ave SE then turn on first driveway on the left.
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)
Mortgage Calculator
Estimated Monthly Payment
$0
Down Payment
$0
Loan Amount
$0
Provided by Beyond Real Estate, LLC
Based on information submitted to the MLS GRID as of June 23, 2026 10:04 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.
