$8,495,000
Active

4102 100th Avenue SE

Mercer Island, WA 98040
Browse more homes in Mercer Island, WA
5
Beds
4
Baths
5,535
SqFt
2010
Built
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!
4102 100th Avenue SE
MORTGAGE CALCULATOR
$42,955
Estimate only — not a loan offer. Consult a lender for actual terms.

LISTING SNAPSHOT

Price$8,495,000
Bedrooms5
Full Baths3
Half Baths2
Inside Area (SqFt)5,535 sqft
Lot Size0.505 Acres
Year Built2010
MLS® Number2543693
StatusActive
Property Tax41749
HOA/Condo/Coop FeesN/A

GENERAL

Acres0.505
Attached GarageYes
Direction FacesEast
GarageYes
Land LeaseNo
LevelsTwo
ParkingAttached, RV Access/Parking
Parking Spaces3
Property Sub TypeSingle Family Residence
SecuritySecurity System
SqFt Total5535
StyleCraftsman
UtilitiesCable Available, Sewer Connected
Water SourcePublic

INTERIOR

AppliancesDishwasher, Double Oven, Dryer, Microwave, Refrigerator, Disposal, Gas Water Heater, Washer, Water Heater
BasementDaylight, Finished
CoolingCentral Air, Heat Pump
FireplaceYes
Fireplace FeaturesGas, Wood Burning
Fireplaces4
FlooringCeramic Tile, Hardwood, Slate, Carpet
HeatingNatural Gas
InteriorCentral Vacuum, Walk-In Closet(s), Pantry, Vaulted Ceiling(s)
Main Level Bedrooms1
Window FeaturesSkylight(s)
Bathroom FullLevel - Lower
Bathroom HalfLevel - Main
Bathroom Three QuarterLevel - Second
BedroomLevel - Lower
DenLevel - Main
Extra Fin RoomLevel - Lower
Family RoomLevel - Main
Great RoomLevel - Main
Master BedroomLevel - Main
Rec RoomLevel - Lower
Utility RoomLevel - Lower

EXTERIOR

Construction DetailsStone, Wood Siding
ExteriorGarden
FencingPartial
Lot FeaturesLevel, Paved, Waterfront
Patio And PorchDeck, Patio
RoofComposition
ViewLake, Mountain(s)
WaterfrontYes
Waterfront FeaturesWaterfront
WaterviewLake, Mountain(s)
Windows/DoorsSkylight(s)

COMMUNITY

Financing Terms AvailableCash, Conventional
MLS Area510 - Mercer Island
School DistrictMercer Island

SCHOOLS

School DistrictMercer Island
Elementary SchoolBuyer To Verify
Middle SchoolIslander Mid
High SchoolMercer Isl High

RECENT ACTIVITY

June 22, 2026Active

Listing courtesy of Windermere Real Estate/East

Courtesy of NWMLS
Listing courtesy of Joan C. Bayley of Windermere Real Estate/East



Listing information is provided by Participants of the Northwest MLS. IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed. Copyright 2026, Northwest MLS.
All data is obtained from various sources and may not have been verified by the 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.
Last checked: 2026-07-15 08:54 AM PDT

Comps

Limited comparable sales data available in this area.

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