For Sale231d on market
7909 78th Avenue SE
Mercer Island, WA, 98040 • 98040 • King County
$7,580,000
$812/sqft
-$220,000 since Feb 26, 2026
Down payment assistance available
7Beds
11Baths
9,340Sqft
0.54 acLot
1996Built
Property DNA
Waterfront Property
Direct water access
Scenic Views
Lake · Territorial
2 Stories w/Bsmnt Style
Built 1996 · 30 years of history
Mercer Island
98040
Outdoor Living
Second Kitchen · Bath Off Primary · Built-In Vacuum · Dbl Pane/Storm Window · Dining Room · Fireplace · Fireplace (Primary Bedroom) · French Doors · 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
2 Fireplaces
Gas · Main Level: 1 · Upper Level: 1 · Fireplace
Garage
Attached Garage
Ceramic Tile & Hardwood Floors
Quality flooring throughout
This home is getting attention
Listed 231 days ago · 2,044 views · 64 saves
Market activity
Demand and pricing signals for this listing
2,044 views
People checking out this listing
64 saves
Buyers have saved this home
231 days on market
Established listing
$812/sqft
Price per square foot
About this home
Single Family · Built 1996
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.
Standout features identified
Our analysis highlights indoor pool, wine cellar, and serene lake backdrop as key attractions of this home.
Estimated monthly payment
Based on current rates
$47,200/month
Principal & Interest$37,093
Property Tax$7,580
Insurance$2,527
Down payment20% ($1,516,000)
3%50%
Est. 6.19% rate · 30yr fixed · $6,064,000 loan
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At a glance
Key facts and listing details
TypeSingle Family Residence
Year Built1996
HeatingFireplace, 90%+ High Efficiency, Forced Air, Heat Pump, Electric, Natural Gas
Cooling90%+ High Efficiency
Parking4 Attached Garage spaces
Lot0.54 Acres
Days on Zillow231 Days
Price/sqft$812
Property
Home typeSingle Family
Sub-typeSingle Family Residence
Style2 Stories w/Bsmnt
Year built1996
Stories2
Systems
HeatingFireplace, 90%+ High Efficiency, Forced Air, Heat Pump, Electric, Natural Gas
Cooling90%+ High Efficiency
RoofTile
ConstructionStone, Stucco
Water / SewerPublic, Company: City of Mercer Island / Sewer Connected, Company: City of Mercer Island
Parking & Outdoor
ParkingAttached Garage
BasementDaylight,Finished
Fireplaces2
Lot0.54 Acres
Location & Tax
Neighborhood98040
ZoningR-15
Annual tax$32,247
Parcel2524049014
Bathrooms & Fees
Full baths4
Features & details
14 categories of property features
Interior Features
Interior
Bath Off Primary
Central Vacuum
Dining Room
High Tech Cabling
Pantry
Sauna
Appliances
Dishwasher
Disposal
Dryer
Microwave
Refrigerator
Stove(s)/Range(s)
Washer
Dishwasher(s)
Dryer(s)
Garbage Disposal
Microwave(s)
Refrigerator(s)
Washer(s)
Water Heater: Gas
Water Heater Location: Basement
Flooring
Ceramic Tile
Hardwood
Carpet
Heating
Fireplace
90%+ High Efficiency
Forced Air
Heat Pump
Electric
Natural Gas
Cooling
90%+ High Efficiency
Fireplace
Gas
Main Level: 1
Upper Level: 1
Fireplace
Windows
Dbl Pane/Storm Window
Exterior Features
Parking
Attached Garage
Construction
Stone
Stucco
Patio & Porch
Second Kitchen
Bath Off Primary
Built-In Vacuum
Dbl Pane/Storm Window
Dining Room
Fireplace
Fireplace (Primary Bedroom)
French Doors
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
Lot Features
Dead End Street
Paved
Athletic Court
Cable TV
Deck
Gas Available
Hot Tub/Spa
Security
Security System
Views
Lake
Territorial
Pool Features
Indoor
Room details
18 rooms detailed
Master Bedroom
SecondBathroom Full
SecondBathroom Full
SecondBathroom Full
LowerBathroom Full
MainBathroom Three Quarter
SecondListing insights
Market data and value estimates
StatusFor Sale
Days on market231
Est. value$7,117,200
Est. rent$7,232/mo
Tax rate0.82%
Price/sqft$812
On marketMar 1, 2025
PostedAug 19, 2025
Last sold$2,330,000
MLS statusActive
MLS updatedMar 27, 2026
Tour days9
Views2,044
Favorites64
How are the schools in Mercer Island?
3 schools rated nearby
Location
Mercer Island, WA, 98040
Price history
13 events
DateEventPrice$/sqftSource
Feb 26, 2026Price Change$7,580,000$812NWMLS as distributed by MLS GRID
Nov 26, 2025Price Change$7,800,000$835NWMLS as distributed by MLS GRID
Sep 10, 2025Price Change$7,980,000$854NWMLS as distributed by MLS GRID
Aug 19, 2025Listed For Sale$8,488,000$909NWMLS as distributed by MLS GRID
Jul 2, 2025Listing Removed$8,980,000$961John L Scott Real Estate
Apr 2, 2025Price Change$8,980,000$961John L Scott Real Estate
Jan 14, 2025Listed For Sale$9,380,000$1,004John L Scott Real Estate
Aug 25, 2011Sold$2,330,000$249NWMLS as distributed by MLS GRID
Jun 19, 2011Pending Sale$2,850,000$305John L Scott Real Estate
May 25, 2011Listed For Sale$2,850,000$305John L Scott Real Estate
May 11, 2011Pending Sale$2,850,000$305John L Scott Real Estate
Mar 3, 2011Listed For Sale$2,850,000$305Open House Advertising
Feb 4, 1994Sold$320,000$34Public Record
Price Change$7,580,000
Feb 26, 2026•$812/sqft•NWMLS as distributed by MLS GRID
Price Change$7,800,000
Nov 26, 2025•$835/sqft•NWMLS as distributed by MLS GRID
Price Change$7,980,000
Sep 10, 2025•$854/sqft•NWMLS as distributed by MLS GRID
Listed For Sale$8,488,000
Aug 19, 2025•$909/sqft•NWMLS as distributed by MLS GRID
Listing Removed$8,980,000
Jul 2, 2025•$961/sqft•John L Scott Real Estate
Price Change$8,980,000
Apr 2, 2025•$961/sqft•John L Scott Real Estate
Listed For Sale$9,380,000
Jan 14, 2025•$1,004/sqft•John L Scott Real Estate
Sold$2,330,000
Aug 25, 2011•$249/sqft•NWMLS as distributed by MLS GRID
Pending Sale$2,850,000
Jun 19, 2011•$305/sqft•John L Scott Real Estate
Listed For Sale$2,850,000
May 25, 2011•$305/sqft•John L Scott Real Estate
Pending Sale$2,850,000
May 11, 2011•$305/sqft•John L Scott Real Estate
Listed For Sale$2,850,000
Mar 3, 2011•$305/sqft•Open House Advertising
Sold$320,000
Feb 4, 1994•$34/sqft•Public Record
Tax history
21 years of records
YearTax paidAssessed value
Apr 7, 2024$32,248$4,925,000
Apr 7, 2023$31,838$4,625,000
Apr 7, 2022$31,718$5,172,000
Apr 7, 2021$28,466$3,866,000
Apr 7, 2020$27,325$3,414,000
Apr 7, 2019$27,526$3,485,000
Apr 7, 2018$25,630$3,411,000
Apr 7, 2017$26,702$3,078,000
Apr 7, 2016$20,214$2,771,000
Apr 7, 2015$20,214$2,510,000
Apr 7, 2014$20,214$2,311,000
Apr 7, 2013$20,214$1,914,000
Apr 7, 2012—$1,765,000
Apr 7, 2011—$1,743,000
Apr 7, 2010—$1,826,000
Apr 7, 2009—$1,826,000
Apr 7, 2007—$2,192,000
Apr 7, 2006—$2,189,000
Apr 7, 2005—$1,993,000
Apr 7, 2001$13,189$1,380,000
Apr 7, 2000$12,567$1,191,000
Nearby homes
Neighborhood details
Local context around this listing
Mercer Island, WA • King County
Nearby cities
AuburnBellevueBothellFederal WayKentKirklandRedmondRenton
Nearby zip codes
98040
Similar homes
Based on information submitted to the MLS GRID as of 2026-04-07 11:48:42 PDT. 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. [Click here for more information](/mls-disclaimers/#39)
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