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$6,800,000
7909 78th Avenue SE, Mercer Island, WA 98040
Mercer Island, WA, 98040
Active · 13 days on market
6Beds
11Baths
9,340Sq Ft
1996Year built
0.5411Lot (acres)
Single Family ResidenceType

About this home

Exceptional South Mercer Island living with Lake Washington and Mount Rainier views. Set on an expansive 23,000+ square foot lot, this impressive 9,340-square-foot residence offers remarkable scale, privacy and resort-style amenities designed for both everyday living and unforgettable entertaining. Generous gathering spaces flow throughout the home, while walls of windows capture beautiful views. Enjoy year-round recreation with an indoor swimming pool and private sport court—creating your own retreat without leaving home. Multiple indoor and outdoor entertaining areas provide space to host on any scale, from relaxed gatherings to special celebrations. A separate guest apartment above the garage offers exceptional flexibility for guests, au pair, home office or additional living space. Ideally located on the south end of Mercer Island with convenient access to shopping, dining, parks and highly regarded Mercer Island schools. A rare combination of views, space, recreation and convenience in one extraordinary island property.

Interior features

Second Kitchen
Bath Off Primary
Built-In Vacuum
Dbl Pane/Storm Window
Fireplace
Fireplace (Primary Bedroom)
High Tech Cabling
Hot Tub/Spa
Indoor Pool
Jetted Tub
Pantry
Sauna
Security System
Sprinkler System
Vaulted Ceiling(s)
Walk-In Closet(s)
Water Heater
Wet Bar
Wine Cellar
Wine/Beverage Refrigerator
Wired for Generator

Exterior features

Stone
Stucco

Appliances

Dishwasher
Disposal
Dryer
Microwave
Refrigerator
Stove(s)/Range(s)
Washer

Parking

Attached Garage

Schools

Elementary: Lakeridge Elem
Middle: Islander Mid
High: Mercer Isl High
District: Mercer Island

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Courtesy of COMPASS. The data relating to real estate for sale on this site comes in part from the Northwest Multiple Listing Service (NWMLS). Listings held by brokerage firms other than this brokerage are marked by the three-tree symbol; detailed information about such listings includes the name of the listing brokerage. This information is provided for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties. All information is deemed reliable but not guaranteed and should be independently verified.

Based on information from the Northwest Multiple Listing Service as of September 24, 2026.

ARAgencyOne RealtyAgencyOne Realty · Questions about this home?