7909 78th Avenue Se, Mercer Island, WA 98040

Mercer Island
Local realty services provided by:RSVP Brokers ERA
Listed by: helena chen
Office: exp realty
MLS#:2420036
Source:NWMLS
7909 78th Avenue Se,Mercer Island, WA 98040
$7,580,000
  • 7 Beds
  • 11 Baths
  • 9,340 sq. ft.
  • Single family
  • Active

Price summary

  • Price:$7,580,000
  • Price per sq. ft.:$811.56

About this home

Perched above Lake Washington with expansive views, this custom estate showcases exquisite cherry millwork throughout. The main-level primary suite opens to a private patio, and upstairs, an additional primary suite with its own terrace complements three more ensuites. Entertain effortlessly in the gourmet kitchen with high-end appliances and butler’s pantry. The lower level transforms into a resort-style retreat with indoor pool, spa, sauna, gym, theater, billiards room, and wine cellar. Outside, expansive decks, a sport court, putting green, and professionally landscaped grounds frame the serene lake backdrop. Experience refined luxury living in a singular setting.

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Home facts

  • Year built:1996
  • Listing ID #:2420036
  • Updated:May 24, 2026 at 11:06 AM

Rooms and interior

  • Bedrooms:7
  • Total bathrooms:11
  • Full bathrooms:4
  • Half bathrooms:3
  • Flooring:Carpet, Ceramic Tile Floor, Hardwood
  • Kitchen Description:Dishwasher, Disposal, Microwave, Refrigerator
  • Bedroom Description:Lower Level Bedrooms : 1, Main Level Bedrooms : 1, Upper Level Bedrooms : 5
  • Basement:Yes
  • Basement Description:Daylight, Finished
  • Living area:9,340 sq. ft.

Heating and cooling

  • Cooling:90%+ High Efficiency
  • Heating:90%+ High Efficiency, Forced Air, Heat Pump
  • Central air:Yes

Structure and exterior

  • Roof:Tile
  • Year built:1996
  • Building area:9,340 sq. ft.
  • Lot area:0.54 Acres
  • Lot Features:Dead-end Street, Paved
  • Construction Materials:Stone Exterior Finish, Stucco Exterior Finish
  • Exterior Features:Athletic Court, Deck
  • Foundation Description:Daylight, Finished
  • Levels:2 Story

Schools

  • High school:Mercer Isl High
  • Middle school:Islander Mid
  • Elementary school:Lakeridge Elem

Utilities

  • Water:Public
  • Sewer:Sewer Connected

Finances and disclosures

  • Price:$7,580,000
  • Price per sq. ft.:$811.56
  • Tax amount:$32,248 (2025)

Features and amenities

  • Appliances:Dishwasher, Refrigerator, Washer
  • Laundry features:Dryer, Washer
  • Amenities:Athletic Court, Built-In Vacuum, Cable TV, French Doors, Gas Available, Pantry, Security System, Sprinkler System, Vaulted Ceiling(s), Walk-In Closet(s), Water Heater, Wine Cellar

Parking

  • Parking description:Attached Garage
  • Garage:Yes
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