Listed by eXp Realty
$8,488,000
OPEN SAT 2:30PM - 4:30PM

7909 78th Ave SE Mercer Island, WA 98040

Island Point Neighborhood

Estimated payment $48,936/month

Total Views 1,074
7 Beds
11 Baths
9,340 Sq Ft
$909 Price per Sq Ft

Highlights

  • Popular Property
  • Second Kitchen
  • Wine Cellar
  • Lakeridge Elementary School Rated A
  • Indoor Pool
  • Sauna

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.

Listing Agent

Helena Chen

eXp Realty License #24024734 Listed on: 08/18/2025

eXp Realty

Source: Northwest Multiple Listing Service (NWMLS)

MLS#: 2420036

Northwest Multiple Listing Service (NWMLS)

Open House Schedule

Home Details

Home Type

  • Single Family

Est. Annual Taxes

  • $32,248

Year Built

  • Built in 1996

Lot Details

  • 0.54 Acre Lot
  • Street terminates at a dead end
  • Terraced Lot
  • Sprinkler System
  • Fruit Trees
  • Garden

Parking

  • 4 Car Attached Garage

Property Views

  • Lake
  • Mountain
  • Territorial

Home Design

  • Poured Concrete
  • Tile Roof
  • Stone Siding
  • Stucco
  • Stone

Interior Spaces

  • 9,340 Sq Ft Home
  • 2-Story Property
  • Wet Bar
  • Central Vacuum
  • Vaulted Ceiling
  • 2 Fireplaces
  • Gas Fireplace
  • French Doors
  • Wine Cellar
  • Dining Room
  • Sauna
  • Finished Basement
  • Natural lighting in basement

Kitchen

  • Second Kitchen
  • Walk-In Pantry
  • Stove
  • Microwave
  • Dishwasher
  • Disposal

Flooring

  • Wood
  • Carpet
  • Ceramic Tile

Bedrooms and Bathrooms

  • Fireplace in Primary Bedroom
  • Walk-In Closet
  • Bathroom on Main Level
  • Hydromassage or Jetted Bathtub
  • Spa Bath

Laundry

  • Dryer
  • Washer

Home Security

  • Home Security System
  • Storm Windows

Pool

  • Indoor Pool
  • Spa

Outdoor Features

  • Sport Court
  • Deck

Schools

  • Lakeridge Elementary School
  • Islander Mid Middle School
  • Mercer Isl High School

Utilities

  • High Efficiency Air Conditioning
  • Forced Air Heating and Cooling System
  • High Efficiency Heating System
  • Heat Pump System
  • Water Heater
  • High Tech Cabling
  • Cable TV Available

Community Details

  • No Home Owners Association
  • Mercer Island Subdivision

Listing and Financial Details

  • Assessor Parcel Number 2524049014

Home Details

Home Type

Single Family

Est. Annual Taxes

$32,248

Year Built

Built in 1996

Lot Details

0

Parking

4

Listing Details

  • Property Type: Residential
  • Property Sub Type: Single Family Residence
  • StyleCode: 18 - 2 Stories w/Bsmnt
  • Year Built: 1996
  • Inclusions: Dishwasher(s),Dryer(s),Garbage Disposal,Microwave(s),Refrigerator(s),Stove(s)/Range(s),Washer(s)
  • MLS Status: Active
  • Prev Status: Active
  • Unit Levels: Two
  • New Construction: No
  • CalculatedSquareFootage: 9340
  • EffectiveYearBuiltSource: Public Records
  • SeniorExemption: false
  • Special Features: 4097
  • Cumulative Days on Market: 173

Interior Features

  • Fireplaces: 2
  • Basement: Daylight, Finished
  • Private Spa: Yes
  • Appliances: Dishwasher(s), Disposal, Dryer(s), Microwave(s), Refrigerator(s), Stove(s)/Range(s), Washer(s)
  • Full Bathrooms: 4
  • Half Bathrooms: 3
  • Three Quarter Bathrooms: 4
  • Possible Bedrooms: 7
  • Total Bedrooms: 7
  • Entry Location: Main
  • Fireplace Features: Gas
  • Fireplace: Yes
  • Flooring: Ceramic Tile, Hardwood, Carpet
  • Interior Amenities: 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
  • Living Area: 9340
  • Main Level Bathrooms: 3
  • Main Level Bedrooms: 1
  • Bathrooms: 8.5
  • BathsFullMain: 1
  • FireplacesMain: 1
  • SquareFootageFinished: 9340
  • SquareFootageUnfinished: 0
  • BathsFullGarage: 0
  • BathsFullLower: 1
  • BathsFullUpper: 2
  • BathsHalfGarage: 0
  • BathsHalfLower: 1
  • BathsHalfMain: 2
  • BathsHalfUpper: 0
  • BathsThreeQuarterGarage: 0
  • BathsThreeQuarterLower: 1
  • BathsThreeQuarterMain: 0
  • BathsThreeQuarterUpper: 3
  • BedroomsLower: 1
  • BedroomsUpper: 5
  • AppliancesIncluded: Dishwasher(s),Dryer(s),Garbage Disposal,Microwave(s),Refrigerator(s),Stove(s)/Range(s),Washer(s)
  • FireplacesUpper: 1
  • NWM_NumberOfBathtubs: 4
  • NWM_NumberOfShowers: 8

Exterior Features

  • Roof: Tile
  • View: Lake, Mountain(s), Territorial
  • Lot Features: Dead End Street, Paved
  • Pool Features: Indoor
  • View: Yes
  • Waterfront: No
  • Construction Type: Stone, Stucco
  • Exterior Features: Stone, Stucco
  • Foundation Details: Poured Concrete
  • Structure Type: House
  • PoolType: Indoor

Garage/Parking

  • Attached Garage: Yes
  • Carport Y N: No
  • Covered Parking Spaces: 4
  • Garage Spaces: 4
  • Garage Yn: Yes
  • Open Parking: No
  • Parking Features: Attached Garage
  • Total Parking Spaces: 4

Utilities

  • Sewer: Sewer Connected
  • Water Source: Public
  • Security: Security System
  • Cooling: 90%+ High Efficiency, Central A/C
  • Cooling Y N: Yes
  • Heating: 90%+ High Efficiency, Forced Air, Heat Pump
  • Heating Yn: Yes
  • PowerCompany: Puget Sound Energy
  • SewerCompany: City of Mercer Island
  • WaterCompany: City of Mercer Island
  • WaterHeaterLocation: Basement
  • WaterHeaterType: Gas

Condo/Co-op/Association

  • Senior Community: No
  • Association: No

Schools

  • Junior High Dist: Mercer Island
  • High School: Mercer Isl High
  • Middle Or Junior School: Islander Mid

Lot Info

  • Parcel Number: 2524049014
  • Topography: Partial Slope,Terraces
  • Land Lease: No
  • Lot Size Acres: 0.5411
  • Lot Size Sq Ft: 23571
  • Zoning: R-15
  • Irrigation Water Rights: No
  • ShowMapLink: true
  • SiteFeatures: Athletic Court,Cable TV,Deck,Gas Available,Hot Tub/Spa
  • MLSLotSizeSource: Public Records
  • MLSSquareFootageSource: Public Records
  • ZoningJurisdiction: City

Green Features

  • Power Production Type: Electric, Natural Gas

Tax Info

  • Year: 2025
  • Tax Annual Amount: 32247.72

Multi Family

  • EnergySource: Electric,Natural Gas

MLS Schools

  • Elementary School: Lakeridge Elem

Map

Range of Values:

Collateral Analytics

Collateral Analytics Collateral Analytics AVMs (Automated Valuation Model) employ a number of statistical approaches combined with neighborhood-specific comparable selection guarantees the most up-to-date and precise valuations.

Not Available

Collateral Analytics does not have data for the current month. Please view the chart for historical values.

ICE

ICE Mortgage Technology ICE Mortgage Technology’s AVM (Automated Valuation Model) is a state-of-the-art online residential property valuation tool that provides a quick and accurate estimate of the value of almost any home in the U.S.

Not Available

ICE Mortgage Technology does not have data for the current month. Please view the chart for historical values.

First American

First American First American Data & Analytics’ next-generation AVM combines unrivaled data assets with a blended ensemble of valuation models to produce highly accurate, reliable valuations you can trust.

Not Available

First American does not have data for the current month. Please view the chart for historical values.

Quantarium

Quantarium Quantarium’s valuation service, repeatedly proven the industry’s most accurate and comprehensive, is supercharged with a self-learning and auto-tuning AI engine that continually becomes smarter and more accurate as it processes daily inputs from the industry’s leading RE data lake.

Not Available

Quantarium does not have data for the current month. Please view the chart for historical values.

Average Value
Not Available
List Price
Sold Price
Create a Home Valuation Report for This Property
The Home Valuation Report is an in-depth analysis detailing your home's value as well as a comparison with similar homes in the area

Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Tax History

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2024 $32,248 $4,925,000 $2,211,000 $2,714,000
2023 $31,838 $4,625,000 $2,086,000 $2,539,000
2022 $28,466 $5,172,000 $2,347,000 $2,825,000
2021 $27,325 $3,866,000 $1,932,000 $1,934,000
2020 $27,526 $3,414,000 $1,840,000 $1,574,000
2018 $26,702 $3,411,000 $1,561,000 $1,850,000
2017 $22,551 $3,078,000 $1,412,000 $1,666,000
2016 $20,978 $2,771,000 $1,291,000 $1,480,000
2015 $20,214 $2,510,000 $1,169,000 $1,341,000
2014 -- $2,311,000 $1,081,000 $1,230,000
2013 -- $1,914,000 $952,000 $962,000
Source: Public Records

Property History

Date Event Price Change Sq Ft Price
08/18/2025 08/18/25 For Sale $8,488,000 -- $909 / Sq Ft
Source: Northwest Multiple Listing Service (NWMLS)

Purchase History

Date Type Sale Price Title Company
Warranty Deed $2,330,000 Fidelity Natio
Interfamily Deed Transfer -- Chicago Title
Quit Claim Deed -- --
Warranty Deed $320,000 Transamerica Title
Source: Public Records

Mortgage History

Date Status Loan Amount Loan Type
Open $1,195,000 Adjustable Rate Mortgage/ARM
Closed $1,398,000 Adjustable Rate Mortgage/ARM
Previous Owner $1,400,000 Credit Line Revolving
Previous Owner $1,000,000 Credit Line Revolving
Source: Public Records

Similar Homes in Mercer Island, WA

  • 5044 Butterworth Rd, Mercer Island, WA 98040

    $9,398,000

    • 6 Beds
    • 8 Baths
    • 9,640 Sq Ft
    • 5044 Butterworth Rd
    • Mercer Island, WA

    Iconic Mercer Island Waterfront! Set on 89’ of low-bank Lake Washington shoreline, along the coveted Butterworth Rd, this partially renovated home presents a rare framework to create a signature waterfront masterpiece. Private 95’ seaplane capable dock, 54’ indoor lap pool, and a grand atrium. Embrace East-facing exposure with panoramic water, sunrise and moonrise views. Existing updates provide

    Michael Nix Keller Williams Rlty Bellevue

    Section Image
  • 8260 Avalon Dr, Mercer Island, WA 98040

    $9,890,000

    • 5 Beds
    • 6 Baths
    • 5,390 Sq Ft
    • 8260 Avalon Dr
    • Mercer Island, WA

    Experience superlative Northwest living in this sophisticated and joyous Mercer Island waterfront home. Delight in unobstructed stunning Mt. Rainier views from the private dock and airy and light five bedroom, five bath residence. This classic Cape Cod stunner offers soaring ceilings, hickory hardwood flooring throughout, a chef’s kitchen and three fireplaces. An unusually large, flat lawn and

    Robyn Kimura-Hsu Realogics Sotheby's Int'l Rlty

    Section Image
  • 8066 Avalon Place, Mercer Island, WA 98040

    $8,500,000

    • 5 Beds
    • 4.5 Baths
    • 5,350 Sq Ft
    • 8066 Avalon Place
    • Mercer Island, WA

    This home feels like a Nantucket retreat, yet it is nestled on the shores of Lake Washington and is perfectly positioned with Mt. Rainier as your daily backdrop. Designed for seamless indoor-outdoor living, an open-concept kitchen, great room, living & dining areas flow effortlessly onto a covered deck. Spend summer evenings watching swimmers & sailors. Upstairs, 4 bedrooms include a luxe

    Lori Holden John L. Scott, Inc.

    Section Image
  • 18 Holly Ln, Mercer Island, WA 98040

    $9,995,000

    • 6 Beds
    • 4.5 Baths
    • 5,163 Sq Ft
    • 18 Holly Ln
    • Mercer Island, WA

    Cruise home to a spectacular legacy residence found tucked upon the coveted western shore of Mercer Island. Set upon 137+/- feet of private no bank waterfront, this soul satisfying, custom five bedroom residence was conceived in 1974 with active entertaining in mind. The heart of the nearly 5,200sf home is centered with an updated kitchen allowing a natural flow indoors & out to entertaining

    Scott Richards Windermere Real Estate/East

    Section Image
  • 3840 E Mercer Way, Mercer Island, WA 98040

    $10,300,000

    • 5 Beds
    • 4.5 Baths
    • 6,117 Sq Ft
    • 3840 E Mercer Way
    • Mercer Island, WA

    Magnificent Modern Waterfront! Custom-built & recently transformed into an elevated lakeside oasis: 154’ prime lakefront, re-decked deepwater dock w/ covered boat lift, built-in BBQ & level lawn. Ideal Northend location – dream commute! Spectacular full remodel w/ gourmet kitchen, updated baths, elevator, new fixtures, lighting, windows, flooring, siding & more. Light, bright spaces w/ clean

    Kelly Weisfield COMPASS

    Section Image
  • 7254 N Mercer Way, Mercer Island, WA 98040

    $7,250,000

    • 5 Beds
    • 5.5 Baths
    • 5,100 Sq Ft
    • 7254 N Mercer Way
    • Mercer Island, WA

    A spotless and stunning new-construction home. Sited on the conveniently located north end with easy access to downtown Mercer Island, I-90, Bellevue and Seattle. Captivating lake and city views! Live exceptionally in this perfectly crafted masterpiece, featuring a great room concept with dramatic views which opens to an expansive deck with built-in barbeque and cooking station, two designer

    Patrick Moore Windermere Real Estate/East

    Section Image
See All Homes in Mercer Island

Source: Northwest Multiple Listing Service (NWMLS)

MLS Number: 2420036

Northwest Multiple Listing Service (NWMLS)

APN: 252404-9014

Washington King County Mercer Island 98040 Island Point

7909 78th Ave SE, Mercer Island, WA

This home is located at 7909 78th Ave SE, Mercer Island, WA 98040 and is currently priced at $8,488,000, approximately $908 per square foot. This property was built in 1996. 7909 78th Ave SE is a home located in King County with nearby schools including Lakeridge Elementary School, Islander Middle School, and Mercer Island High School.

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

Northwest Multiple Listing Service (NWMLS) 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 by the Northwest Multiple Listing Service (NWMLS). Property information is based on available data that may include MLS information, county records, and other sources. Listings marked with the 3 tree icon and provided by NWMLS. All properties are subject to prior sale or withdrawal. IDX information is provided exclusively for consumers’ personal noncommercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, that the data is deemed reliable but is not guaranteed by MLS GRID. ©2025 NWMLS.
Based on information submitted to the MLS GRID

Nearby Homes
Helena Chen
Listing Agent
Helena Chen
Section Image
eXp Realty
(206) 895-6982