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4102 100th Avenue SE

Mercer Island, WA 98040
  • $8,495,000
  • STATUS: Active
  • ID#: 2543693
UPDATED: 48 min ago
$8,495,000
  • 5
    BEDS
  • 0.5
    ACRES
  • 4
    BATHS
  • 1
    1/2 BATHS
  • 5,535
    SQFT
  • $1,535
    $/SQFT
Neighborhood:
Type:
Single-Family Home
Built:
2010
County:

School Information

Elementary School:
Middle School:
High School:
School District:
Northwest MLS logo Listing courtesy of Northwest MLS as distributed by MLS GRID. Listing courtesy of Windermere Real Estate/East.
Mortgage Calculator is provided by BoomTown.

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!

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MLS Grid logo

IDX information is provided exclusively for consumers’ personal noncommercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.The listing data relating to real estate for sale on this web site comes in part from the Northwest Multiple Listing Service. Real estate listings held by brokerage firms other than Keller Williams Western Realty are marked by the "three tree" symbol; detailed information about such listings includes the names of the listing brokers. The three tree icon refers to an NWMLS listing. Data last updated 2026-07-11T18:17:44.433. The "Days on Site" data field is calculated by BoomTown and is the number of days since the listing was originally received in our system. It is not the equivalent of "Days on Market".
Based on information submitted to the MLS GRID as of 2026-07-11T18:17:44.433. 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.

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www.kwbellingham.net/homes/178024760
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4102 100th Avenue SE Mercer Island, WA 98040

  • Price: $8,495,000
  • Status: Active
  • On Site: Days
  • Updated: 48 min ago
  • ID#: 2543693
5
Beds
4
Baths
1
½ Baths
0.5
Acres
5,535
SQFT
$1,535
$/SQFT
2010
Built
Neighborhood:
North End
County:
King
Area:
Mercer Island
Elementary School:
Buyer To Verify
Middle School:
Islander Mid
High School:
Mercer Isl High
School District:
Mercer Island
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!
Exterior Features

Architectural Style Craftsman Attached Garage YN Yes Carport YN No Construction Methods Standard Frame Covered Spaces 3 Exterior Features StoneWood Garage YN Yes Levels Two Lot Features Dead End StreetPaved Open Parking YN No Parking Features Attached GarageRV Parking Parking Total 3 Roof Composition Structure Type House Style Code 18 - 2 Stories w/Bsmnt Topography LevelPartial Slope Vegetation Garden Space View LakeMountains View YN Yes Waterfront Features Medium Bank Waterfront Footage 90 Waterfront YN Yes

Interior Features

ADUBaths 1 ADUBeds 1 Appliances DishwasherDisposalDouble OvenDryerMicrowaveRefrigeratorStove(s)/Range(s)Washer Appliances Included Dishwasher(s)Double OvenDryer(s)Garbage DisposalMicrowave(s)Refrigerator(s)Stove(s)/Range(s)Washer(s) Basement DaylightFinished Baths Full Garage 0 Baths Full Lower 2 Baths Full Main 1 Baths Full Upper 0 Baths Half Garage 0 Baths Half Lower 0 Baths Half Main 1 Baths Half Upper 0 Baths Three Quarter Garage 0 Baths Three Quarter Lower 0 Baths Three Quarter Main 0 Baths Three Quarter Upper 1 Bedrooms Lower 3 Bedrooms Upper 1 Building Area Total 5535 Cooling Central AirHeat Pump Cooling YN Yes Fireplace YN Yes Fireplaces Lower 2 Fireplaces Main 2 Fireplaces Total 4 Flooring Ceramic TileHardwoodSlateCarpet Heating 90%+ High Efficiency Heating YN Yes Interior Features 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 Living Area 5535 Main Level Bedrooms 1 Rooms Bedroom (Lower Level) Bedroom (Lower Level) Bedroom (Lower Level) Primary Bedroom (Main Level) Bedroom (Second Level) Bathroom Full (Lower Level) Bathroom Full (Lower Level) Bathroom Three Quarter (Second Level) Extra Fin Room (Lower Level) Utility Room (Lower Level) Great Room (Main Level) Den/Office (Main Level) Rec Room (Lower Level) Family Room (Main Level) Bathroom Full (Main Level) Bathroom Half (Main Level) Square Footage Finished 5535 Square Footage Unfinished 0

Property Features

Association Fee 0 Association YN No Building Information Built On Lot Building Name Lakeholm Addition Direction Faces East Down Payment Resource YN No Energy Source Natural Gas FIRPTAYN No First Right Of Refusal No Foundation Details Poured Concrete Inclusions Dishwasher(s)Double OvenDryer(s)Garbage DisposalMicrowave(s)Refrigerator(s)Stove(s)/Range(s)Washer(s) Irrigation Water Rights YN No Land Lease YN No Listing Terms CashConventional New Construction YN No Possession Closing Power Company Puget Sound Energy Power Production Type Natural Gas Property Condition Very Good Property Sub Type Single Family Residence Security Features Partially FencedSecurity System Senior Community YN No Senior Exemption No Sewer Sewer Connected Sewer Company City of Mercer Island Site Features Cable TVDeckDockFenced-PartiallyGas AvailableIrrigationMoorageOutdoor FireplacePatioRV ParkingSprinkler System Special Listing Conditions None Tax Annual Amount 41749 Tax Year 2025 Water Company City of Mercer Island Water Heater Location Mechanical Room Water Heater Type Gas (3) Water Source Public Zoning Jurisdiction City

MLS Grid logo

IDX information is provided exclusively for consumers’ personal noncommercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.The listing data relating to real estate for sale on this web site comes in part from the Northwest Multiple Listing Service. Real estate listings held by brokerage firms other than Keller Williams Western Realty are marked by the "three tree" symbol; detailed information about such listings includes the names of the listing brokers. The three tree icon refers to an NWMLS listing. Data last updated 2026-07-11T18:17:44.433. The "Days on Site" data field is calculated by BoomTown and is the number of days since the listing was originally received in our system. It is not the equivalent of "Days on Market".
Based on information submitted to the MLS GRID as of 2026-07-11T18:17:44.433. 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.

Digital Millennium Copyright Act
 
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Keller Williams Western Realty
2211 Rimland Drive, Suite 124
Bellingham WA, 98226
Northwest MLS logo Listing courtesy of Northwest MLS as distributed by MLS GRID. Listing courtesy of Windermere Real Estate/East.
Mortgage Calculator is provided by BoomTown.