4102 100th Avenue SE, Mercer Island, WA 98040 (MLS # 2543693)
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Listing provided courtesy of Northwest MLS; Windermere Real Estate/East
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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!
| LAST UPDATED | 6/22/2026 | TRACT | North End |
|---|---|---|---|
| YEAR BUILT | 2010 | COMMUNITY | North End |
| COUNTY | King | STATUS | Active |
| PROPERTY TYPE(S) | Single Family |
| Elementary School | Buyer To Verify |
|---|---|
| Jr. High School | Islander Mid |
| High School | Mercer Isl High |
| ADDITIONAL DETAILS | |
| AIR | Central Air, Heat Pump |
|---|---|
| AIR CONDITIONING | Yes |
| APPLIANCES | Dishwasher, Disposal, Double Oven, Dryer, Gas Water Heater, Microwave, Refrigerator, Washer, Water Heater |
| AREA | 510 - Mercer Island |
| BASEMENT | Daylight, Finished, Yes |
| CONSTRUCTION | Stone, Wood Siding |
| EXTERIOR | Garden |
| FIREPLACE | Yes |
| GARAGE | Attached Garage, Yes |
| HEAT | Natural Gas |
| INTERIOR | Bath Off Primary, Built-In Vacuum, Dbl Pane/Storm Window, Dining Room, Fireplace, French Doors, High Tech Cabling, Loft, Pantry, Second Kitchen, Security System, Skylight(s), SMART Wired, Sprinkler System, Vaulted Ceiling(s), Walk-In Closet(s), Water Heater, Wine Cellar, Wine/Beverage Refrigerator |
| LOT | 0.505 acre(s) |
| LOT DESCRIPTION | Dead End Street, Paved |
| MLS STATUS | Active |
| PARKING | Attached, RV Access/Parking |
| STORIES | 2 |
| STYLE | 18 - 2 Stories w/Bsmnt |
| SUBDIVISION | North End |
| TAXES | 41749 |
| UTILITIES | Cable Available, Sewer Connected |
| VIEW | Yes |
| VIEW DESCRIPTION | Lake, Mountain(s) |
| WATER | Public |
| WATERFRONT | Yes |
| WATERFRONT DESCRIPTION | Waterfront |
| SATELLITE VIEW |
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Properties with the 
icon are courtesy of Northwest MLS.
Listings courtesy of Northwest MLS as distributed by MLS GRID. Based on information submitted to the MLS GRID as of 6/22/26 5:10 PM PDT. All data is obtained from various sources and may not have been verified by broker or MLS GRID. 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. 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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