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Provided by NWMLS, Listed by Joan C. Bayley, 425-643-5500 at Windermere Real Estate/East
5 Beds
5 Baths
5,535 sqft

$6,880,000

4102 100th Avenue SE, Mercer Island WA, 98040

Price per sqft$1,243.00
Built in2002
Property size5,535 sqft
Property typeResidential

Overview

Pending

Listed Aug 21, 2026

Updated 8 days ago

Undeniably the best waterfront value of the summer! Invest in not one home but two: a 5 bedrm main residence with an apartment/office suite plus a separate 1 bedrm guest house right at the water’s edge. This Northend Retreat showcases 90 ft of shoreline, a pancake flat lawn, a newer dock. 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!

$45,773/mo

Est. mortgage payment based on a $6,880,000 home price.

All estimates are provided by Luxury Presence for informational purposes only. Actual amounts may vary.

Additional information

MLS® ID
2572498

Interior Features

Bedrooms
5
Bathrooms
5
Fireplace
Yes
Cooling
Yes
Heating
Yes
Basement
Yes

Exterior Features

Lot Size
0.51 Acres

Other Property Details

Taxes
$41,749
Tax Frequency
Annually
Garage
Yes
View
Yes
Waterfront
Yes
55+/Senior Community
No
MLS provider logo

Provided by NWMLS, Listed by Joan C. Bayley, 425-643-5500 at Windermere Real Estate/East

The IDX display presents information sourced from the Northwest Multiple Listing Service as of 9/21/2026. The data is intended for personal, non-commercial use and should not be used for any other purpose except to identify potential properties for purchase. While the MLS data displayed is generally deemed reliable, it is NOT guaranteed to be accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and are advised to conduct their own investigations or seek professional assistance. Other sources besides the Listing Agent may have contributed to the MLS data presented. Unless expressly specified in writing, the Broker/Agent has not confirmed any information obtained from external sources. The Broker/Agent may or may not have acted as the Listing and/or Selling Agent and cannot guarantee the accuracy of property locations displayed on any map. The property locations displayed on any map are merely best approximations and exact locations should be independently verified. Based on information submitted to the MLS GRID as of 9/21/2026 at 10:43 AM UTC . 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.

©2026 Northwest Multiple Listing Service all rights reserved.

Data last updated on 9/21/2026 at 10:43 AM UTC 

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