Prevu by reAlpha
BuySellBlogBrowse Listings
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
7909 78th Avenue SE, Mercer Island WA 98040
Washington>Mercer Island>South End

7909 78th Avenue SEMercer Island, WA 98040

For Sale

$7,800,000

Smart Buyer Rebate $78,000

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.

Listed by Helena Chen

·

eXp Realty

Last updated December 03, 2025

·

Source: NWMLS #2420036

Listing Facts

  • TypeSingle-family
  • NeighborhoodSouth End
  • Bedrooms7
  • Bathrooms11
  • Days on Prevu114
  • Taxes$32,247.72/year
  • Size9,340 sqft
  • Price per sqft$835

Amenities

  • Pets Allowed
  • Parking
  • Swimming Pool

Location

Mortgage Calculator

Listing History

11/26/2025
Price Decreased
$7,800,000
09/10/2025
Price Decreased
$7,980,000
08/18/2025
Listed by eXp Realty
$8,488,000

Property Details for 7909 78th Avenue SE

Exterior

Construction

  • Roof: Tile
  • Structure Type: House
  • Year Built: 1996
  • Construction Materials: Stone, Stucco
  • Entry Location: Main
  • Exterior Features: Stone, Stucco

Features

  • Pool Features: Indoor
  • View: Lake, Mountain(s), Territorial

Measurements

  • Building Area Total: 9,340
  • Building Area Units: Square Feet
  • Lot Features: Dead End Street, Paved
  • Lot Size Acres: 0.54
  • Lot Size Square Feet: 23,571
  • Lot Size Units: Square Feet

Financial

Taxes

  • Parcel Number: 2524049014
  • Tax Annual Amount: $32,247.72
  • Tax Year: 2025

Interior

Features

  • Appliances: Dishwasher(s), Disposal, Dryer(s), Microwave(s), Refrigerator(s), Stove(s)/Range(s), Washer(s)
  • Fireplace Features: Gas
  • Fireplace: Yes
  • Fireplaces Total: 2
  • Flooring: Ceramic Tile, Hardwood, Carpet
  • Interior Features: 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
  • Spa: Yes

Measurements

  • Living Area: 9,340

Rooms

  • Basement: Daylight, Finished
  • Bathrooms Full: 4
  • Bathrooms Half: 3
  • Bathrooms Three Quarter: 4
  • Bathrooms Total Integer: 11
  • Bedrooms Total: 7
  • Main Level Bathrooms: 3
  • Main Level Bedrooms: 1

Other

Location

  • Subdivision Name: Mercer Island

Parking

Parking

  • Attached Garage: Yes
  • Covered Spaces: 4
  • Garage Spaces: 4
  • Garage: Yes
  • Parking Features: Attached Garage
  • Parking Total: 4

Schools

Elementary School

  • Elementary School: Lakeridge Elem

High School

  • High School: Mercer Isl High
  • High School District: Mercer Island

Middle or Junior School

  • Middle Or Junior School: Islander Mid

Utilities

Equipment

  • Has Cooling: Yes
  • Has Heating: Yes
  • Sewer: Sewer Connected
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 7 bedrooms and 11 bathrooms in this single-family home at 7909 78th Avenue SE.

What schools are nearby to 7909 78th Avenue SE?

Nearby schools include the Lakeridge Elem Elementary School, Islander Mid Middle School, and Mercer Isl High.

Does this single-family home have parking?

Yes, there are 4 parking spaces available for 7909 78th Avenue SE.

What are the annual taxes for 7909 78th Avenue SE?

Annual taxes for this single-family home are estimated at $32,247.

How does 7909 78th Avenue SE compare to other single-family homes in South End?

This single-family home is listed 62% above the average price for single-family homes in South End and has been on the market for 54 more days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 9,340 sqft.

7909 78th Avenue SE is a 7-bedroom, 11-bath single-family home for sale in Mercer Island WA 98040. Available on Prevu for 114 days at $7,800,000. This includes a recent price decrease of $180,000. This home features 9,340 square feet of living space, located in South End. The median listing price for single-family homes in this area is $3,365,000. Nearby schools include Lakeridge Elem Elementary School, Islander Mid Middle School, and Mercer Isl High. The home offers pets allowed, parking, and swimming pool. Explore more single-family home listings in Mercer Island.

Based on information from NWMLS and/or other sources. All data, including all measurements and calculations of area, is obtained from various sources and has not been, and will not be, verified by Prevu or the MLS. Information is provided exclusively for consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumer may be interested in purchasing.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.