7909 78th Avenue Se, Mercer Island, WA 98040

Local realty services provided by:Knipe Realty ERA Powered
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 two 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 waterfront living in a singular setting.

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Home facts

  • Year built:1996
  • Listing ID #:2420036
  • Updated:December 17, 2025 at 10:43 PM

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)
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