4102 100th Avenue SE, Mercer Island, WA 98040

• 5 beds |
• 5 baths |
• 5,535 sqft

Property Description

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!

Listing Status:

Active

Data Last Updated:

July 5, 2026 at 3:22AM

Listing Office:

Windermere Real Estate/East : 425-643-5500

Listing Agent:

Joan C. Bayley : 425-643-5500

MLS ID:

2543693

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
• Style: Craftsman
• 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