7909 78th Avenue Se, Mercer Island, WA 98040

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
$7,800,000
  • 7 Beds
  • 11 Baths
  • 9,340 sq. ft.
  • Single family
  • Active

Price summary

  • Price:$7,800,000
  • Price per sq. ft.:$835.12

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:February 24, 2026 at 01:30 AM

Rooms and interior

  • Bedrooms:7
  • Total bathrooms:11
  • Full bathrooms:4
  • Half bathrooms:3
  • Living area:9,340 sq. ft.

Heating and cooling

  • Cooling:90%+ High Efficiency, Central A/C
  • Heating:90%+ High Efficiency, Forced Air, Heat Pump

Structure and exterior

  • Roof:Tile
  • Year built:1996
  • Building area:9,340 sq. ft.
  • Lot area:0.54 Acres

Schools

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

Utilities

  • Water:Public
  • Sewer:Sewer Connected

Finances and disclosures

  • Price:$7,800,000
  • Price per sq. ft.:$835.12
  • Tax amount:$32,248 (2025)
MLS LogoListings courtesy of Northwest MLS as distributed by MLS GRID. Based on information submitted to the MLS GRID as of February 24, 2026. 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. Listing information is provided for consumers' personal, non-commercial use, solely to identify prospective properties for potential purchase; all other use is strictly prohibited and may violate relevant federal and state law. Information deemed reliable but not guaranteed. Copyright © 2026 MLS GRID. All Rights Reserved.

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