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.
Active
Listed by:
Helena Chen,
eXp Realty
Price cut: $180K (11/26)
$7,800,000
7909 78th Avenue SE, Mercer Island, WA 98040
7beds
9,340sqft
Est.:
Single Family Residence
Built in 1996
0.54 Acres Lot
$7,358,200 Zestimate®
$835/sqft
$-- HOA
What's special
Indoor poolWine cellarSerene lake backdropExpansive viewsProfessionally landscaped groundsSport courtExquisite cherry millwork
- 116 days |
- 1,218 |
- 70 |
Zillow last checked: 8 hours ago
Listing updated: 21 hours ago
Listed by:
Helena Chen,
eXp Realty
Source: NWMLS,MLS#: 2420036
Tour with a local agent
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 7
- Bathrooms: 11
- Full bathrooms: 4
- 3/4 bathrooms: 4
- 1/2 bathrooms: 3
- Main level bathrooms: 3
- Main level bedrooms: 1
Bedroom
- Level: Lower
Bedroom
- Level: Main
Bathroom full
- Level: Lower
Bathroom full
- Level: Main
Bathroom three quarter
- Level: Lower
Other
- Level: Lower
Other
- Level: Lower
Other
- Level: Main
Other
- Level: Main
Bonus room
- Level: Lower
Den office
- Level: Main
Dining room
- Level: Main
Entry hall
- Level: Main
Family room
- Level: Main
Kitchen with eating space
- Level: Main
Living room
- Level: Main
Rec room
- Level: Lower
Utility room
- Level: Main
Heating
- Fireplace, 90%+ High Efficiency, Forced Air, Heat Pump, Electric, Natural Gas
Cooling
- 90%+ High Efficiency, Central Air
Appliances
- Included: Dishwasher(s), Disposal, Dryer(s), Microwave(s), Refrigerator(s), Stove(s)/Range(s), Washer(s), Garbage Disposal, Water Heater: Gas, Water Heater Location: Basement
Features
- Bath Off Primary, Central Vacuum, Dining Room, High Tech Cabling, Sauna, Walk-In Pantry
- Flooring: Ceramic Tile, Hardwood, Carpet
- Doors: French Doors
- Windows: Double Pane/Storm Window
- Basement: Daylight,Finished
- Number of fireplaces: 2
- Fireplace features: Gas, Main Level: 1, Upper Level: 1, Fireplace
Interior area
- Total structure area: 9,340
- Total interior livable area: 9,340 sqft
Video & virtual tour
Property
Parking
- Total spaces: 4
- Parking features: Attached Garage
- Attached garage spaces: 4
Features
- Levels: Two
- Stories: 2
- Entry location: Main
- Patio & porch: Second Kitchen, Bath Off Primary, Built-In Vacuum, Double Pane/Storm Window, Dining Room, Fireplace, Fireplace (Primary Bedroom), French Doors, High Tech Cabling, Hot Tub/Spa, Indoor Pool, Jetted Tub, Sauna, Security System, Sprinkler System, Vaulted Ceiling(s), Walk-In Closet(s), Walk-In Pantry, Water Heater, Wet Bar, Wine Cellar
- Pool features: Indoor
- Has spa: Yes
- Spa features: Indoor, Bath
- Has view: Yes
- View description: Lake, Mountain(s), Territorial
- Has water view: Yes
- Water view: Lake
Lot
- Size: 0.54 Acres
- Features: Dead End Street, Paved, Athletic Court, Cable TV, Deck, Gas Available, Hot Tub/Spa
- Topography: Partial Slope,Terraces
- Residential vegetation: Fruit Trees, Garden Space
Details
- Parcel number: 2524049014
- Zoning: R-15
- Zoning description: Jurisdiction: City
- Special conditions: Standard
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Single Family Residence
Materials
- Stone, Stucco
- Foundation: Poured Concrete
- Roof: Tile
Condition
- Year built: 1996
- Major remodel year: 1996
Utilities & green energy
- Electric: Company: Puget Sound Energy
- Sewer: Sewer Connected, Company: City of Mercer Island
- Water: Public, Company: City of Mercer Island
Community & HOA
Community
- Security: Security System
- Subdivision: Mercer Island
Location
- Region: Mercer Island
Financial & listing details
- Price per square foot: $835/sqft
- Tax assessed value: $4,925,000
- Annual tax amount: $32,247
- Date on market: 3/1/2025
- Cumulative days on market: 287 days
- Listing terms: Cash Out,Conventional
- Inclusions: Dishwasher(s), Dryer(s), Garbage Disposal, Microwave(s), Refrigerator(s), Stove(s)/Range(s), Washer(s)
Estimated market value
$7,358,200
$6.99M - $7.73M
$7,232/mo
Price history
Price history
| Date | Event | Price |
|---|---|---|
| 11/26/2025 | Price change | $7,800,000-2.3%$835/sqft |
Source:  NWMLS #2420036 Report a problem | ||
| 9/10/2025 | Price change | $7,980,000-6%$854/sqft |
Source: NWMLS #2420036 Report a problem | ||
| 8/19/2025 | Listed for sale | $8,488,000-5.5%$909/sqft |
Source: NWMLS #2420036 Report a problem | ||
| 7/2/2025 | Listing removed | $8,980,000$961/sqft |
Source: John L Scott Real Estate #2321050 Report a problem | ||
| 4/2/2025 | Price change | $8,980,000-4.3%$961/sqft |
Source: John L Scott Real Estate #2321050 Report a problem | ||
Public tax history
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | $32,248 +1.3% | $4,925,000 +6.5% |
| 2023 | $31,838 +0.4% | $4,625,000 -10.6% |
| 2022 | $31,718 +11.4% | $5,172,000 +33.8% |
Find assessor info on the county website
BuyAbility℠ payment
Est. payment
$46,916/mo
Principal & interest
$38856
Property taxes
$5330
Home insurance
$2730
Climate risks
Neighborhood: 98040
Nearby schools
GreatSchools rating
- 9/10Lakeridge Elementary SchoolGrades: K-5Distance: 0.3 mi
- 8/10Islander Middle SchoolGrades: 6-8Distance: 0.5 mi
- 10/10Mercer Island High SchoolGrades: 9-12Distance: 2.9 mi
Schools provided by the listing agent
- Elementary: Lakeridge Elem
- Middle: Islander Mid
- High: Mercer Isl High
Source: NWMLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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