4102 100th Avenue SE, Mercer Island, WA 98040

• 5 beds |
• 5 baths |
• 5,535 sqft

Property Description

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!

Listing Status:

Active

Data Last Updated:

May 1, 2026 at 10:19PM

Listing Office:

Windermere Real Estate/East : 425-643-5500

Listing Agent:

Joan C. Bayley : 425-643-5500

MLS ID:

2501508

Interior

• General: Second KitchenBath Off PrimaryBuilt-In VacuumDbl Pane/Storm WindowDining RoomFireplaceFrench DoorsHigh Tech CablingLoftPantrySecurity SystemSkylight(s)SMART WiredSprinkler SystemVaulted Ceiling(s)Walk-In Closet(s)Water HeaterWine CellarWine/Beverage Refrigerator
• Appliances: DishwasherDisposalDouble OvenDryerMicrowaveRefrigeratorStove(s)/Range(s)Washer
• Basement: DaylightFinished
• Flooring: Ceramic TileHardwoodSlateCarpet
• A/C: Central AirHeat Pump
• Heating: 90%+ High Efficiency
• Fireplace: GasWood BurningFireplaceFireplaces: 4

Exterior

• General: StoneWood
• Parking: Attached GarageRV ParkingParking spaces: 3

Construction

• Roofing: Composition
• General: Standard FrameTwoPoured Concrete

Location

• HOA Amenities: 0.0
• Originating MLS: nwmls
• School District: Mercer Island
• County: King

Lot

• Topography: LevelPartial Slope
• Zoning: 4131900045
• View: LakeMountainsView
• Waterfront: 90

Utilities

• Water: Public
• Sewer: Sewer Connected

Financial

• Source: nwmls