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$6,800,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 6 Beds
  • 4 Full Baths
  • 7 Partial Baths
  • 9,340 Sq. Ft.
  • Updated 3 days ago

Listed by Tere Foster | Compass | (425) 242-6440 and Robert Pong | Realogics Sotheby's Int'l Rlty | (425) 800-0310

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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.

Full Property Details for 7909 78th Ave SE

General

  • Price: $6,800,000
  • Taxes: $37,420 (2026)
  • Status: Active
  • Type: Single Family
  • Source: NWMLS
  • MLS ID: 2580194
  • Updated: 9/11/2026
  • Added to Site: 6 day(s) ago

Interior

  • 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
  • Fireplace: Yes
  • Number of Fireplaces: 2
  • Fireplace(s): Gas
  • Appliances: Dishwasher(s), Dryer(s), Garbage Disposal, Microwave(s), Refrigerator(s), Stove(s)/Range(s), Washer(s)
  • Flooring: Ceramic Tile, Hardwood, Travertine, Carpet

Rooms

Bathrooms

  • Total Bathrooms: 11
  • Full Bathrooms: 4
  • 3/4 Bathrooms: 4
  • Half Bathrooms: 3
  • Upper - Full Baths: 2
  • Upper - 3/4 Baths: 3
  • Main Floor Baths: 3
  • Main - 1/2 Baths: 2
  • Lower - Full Baths: 1
  • Lower - 3/4 Baths: 1
  • Lower - 1/2 Baths: 1

Bedrooms

  • Total Bedrooms: 6
  • Bedrooms Upper: 4
  • Bedrooms Lower: 1
  • Bedrooms Main: 1

Additional Information

  • Amenities: Athletic Court, Cable TV, Deck, Fenced-Partially, Gas Available, High Speed Internet, Hot Tub/Spa, Patio, Sprinkler System
  • Pool: Yes
  • Pool Description: Indoor
  • Spa: Yes
  • Security/Safety: Partially Fenced, Security System

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Covered Spaces: 4
  • Parking Features: Attached Garage

Location

  • Area: 510 - Mercer Island
  • County: King
  • Subdivision: Mercer Island
  • Driving Directions: Please call with any questions.

School Information

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

Heating & Cooling

  • Air Conditioning: Yes
  • Cooling Type: 90%+ High Efficiency, Central Air
  • Heating Type: 90%+ High Efficiency, Forced Air, Heat Pump
  • Water Heater: Gas

Utilities

  • Sewer: Sewer Connected
  • Water: Public

Structural Information

  • Structure Type: House
  • Exterior Const.: Stone, Stucco
  • Basement Desc.: Daylight, Finished
  • Foundation: Poured Concrete
  • Roof: Tile
  • Entry Location: Main
  • Square Feet: 9,340
  • Finished Total: 9,340 Sq. Ft.
  • Year Built: 1996

Lot Features

  • Property View: Lake, Mountains, Territorial
  • Lot Size (Acres): 0.5411
  • Lot Size (Sq. Ft.): 23,571
  • Lot Size Source: Public Records
  • Topography: Partial Slope, Terraces
  • Lot Features: Dead End Street, Paved
  • Trees/Vegetation: Fruit Trees, Garden Space

Financial Considerations

  • Tax Amount: $37,420.23
  • Tax Year: 2026
  • Terms: Cash, Conventional

Disclosures and Reports

  • Special Conditions: None
  • Inclusions: Dishwasher(s), Dryer(s), Garbage Disposal, Microwave(s), Refrigerator(s), Stove(s)/Range(s), Washer(s)
  • Property ID: 2524049014
  • Lot Number: 3

Listed by Tere Foster | Compass | (425) 242-6440 and Robert Pong | Realogics Sotheby's Int'l Rlty | (425) 800-0310

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Schools serving 7909 78th Ave SE

School District:Mercer Island School District
NameGradesDistance
Lakeridge Elementary School, Mercer Island, WA
8215 Southeast 78th Street, Mercer Island, WA 98040
K-50.3 mi
Northwood Elementary School, Mercer Island, WA
4030 86th Avenue Southeast, Mercer Island, WA 98040
K-53 mi
Islander Middle School
8225 Southeast 72nd Street, Mercer Island, WA 98040
6-80.5 mi
Mercer Island High School
9100 Southeast 42nd Street, Mercer Island, WA 98040
9-122.9 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 7909 78th Ave SE Get Price Alerts and Save Property

Date
Details
Price
Change
Source
9/11/2026
Listed
$6,800,000
191.85%
MLS
8/19/2011
Sold
$2,330,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 7909 78th Ave SE

Year
Property Taxes
Change
Tax Assessment
Change
2026
$37,420
16%
$5,744,000
17%
2025
$32,248
1%
$4,925,000
-5%
2024
$31,838
—
$5,172,000
—
2022
$31,718
16%
$5,172,000
34%
2021
$27,325
—
$3,866,000
13%
2021
$27,325
-1%
$3,414,000
-2%
2020
$27,526
7%
$3,485,000
2%
2019
$25,630
-4%
$3,411,000
11%
2018
$26,702
18%
$3,078,000
11%
2017
$22,551
7%
$2,771,000
10%
2016
$20,978
4%
$2,510,000
9%
2015
$20,214
16%
$2,311,000
21%
2014
$17,486
—
$1,914,000
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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Listed by Tere Foster | Compass | (425) 242-6440 and Robert Pong | Realogics Sotheby's Int'l Rlty | (425) 800-0310

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7909 78th Avenue SE, Mercer Island, WA 98040 (MLS# 2580194) is a Single Family property with 6 bedrooms, 4 full bathrooms and 7 partial bathrooms. 7909 78th Avenue SE is currently listed for $6,800,000 and was received on September 11, 2026. Want to learn more about 7909 78th Avenue SE? Do you have questions about finding other Single Family real estate for sale in Mercer Island? You can browse all Mercer Island real estate or contact a Coldwell Banker agent to request more information.

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