This home's estimate is 14.9% higher than the average sale price ($3.79M) of 5 comparable homes.
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4520 Ferncroft Rd, Mercer Island, WA 98040
About this home
One of a Kind…This iconic Mercer Island estate offers breathtaking East facing Lake Washington vistas and seamlessly blends the charm from its original 1934 construction with modern amenities and exceptional custom updates. The historic main house offers a dramatic primary suite that spans the entire top floor, convenient main floor guest suite plus 2 additional bedrooms in the daylight basement. The storybook 1/2 acre+ grounds feature a tranquil creek with footbridge, generous lawn space, gardens and meandering pathways to appreciate this private setting. The detached carriage house also enjoys the same jaw dropping views and includes a full kitchen plus 3/4 bath-a perfect space for out of town guests, work from home or live-in au pair.

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Market trends in 98040, WA
Last updated July 2026
Buyer's Market
Seller's Market
Seller's market
- OPEN SUN, 12PM TO 2PM$2,100,0004 beds2.5 baths3,120 sq ft7921 E Mercer Way, Mercer Island, WA 98040Grace Currier • Windermere Real Estate/East
- OPEN SUN, 1PM TO 4PM$3,785,0004 beds4.5 baths5,140 sq ft4715 81st Ave SE, Mercer Island, WA 98040Lori Scott • John L. Scott, Inc.
- $409,0002 beds1 bath866 sq ft3055 80th Ave SE #107, Mercer Island, WA 98040Gerald Chew • Coldwell Banker Bain
- OPEN TODAY, 2PM TO 4PM$5,586,0005 beds5.5 baths6,140 sq ft3410 W Mercer Way, Mercer Island, WA 98040Janice Cai • Windermere Bellevue Commons
- OPEN TODAY, 1PM TO 4PM$649,0002 beds2 baths1,145 sq ft3218 80th Ave SE #6, Mercer Island, WA 98040Stacey Koutlas • Coldwell Banker Danforth
- OPEN TODAY, 1PM TO 4PM$1,895,0003 beds2 baths1,400 sq ft2434 73rd Ave SE, Mercer Island, WA 98040Lori Scott • John L. Scott, Inc.
- OPEN TODAY, 2PM TO 4PM$2,100,0004 beds3 baths3,180 sq ft4859 86th Ave SE, Mercer Island, WA 98040Sam Chapin • Engel & Voelkers Mercer Island
- OPEN SUN, 1PM TO 4PM$3,495,0005 beds4.5 baths4,580 sq ft7429 E Mercer Way, Mercer Island, WA 98040Lori Scott • John L. Scott, Inc.
- OPEN TODAY, 1PM TO 4PM$3,250,0005 beds3 baths3,050 sq ft8340 Avalon Dr, Mercer Island, WA 98040Marc Khalili Moftakhari Khalil • Windermere Bellevue Commons
- OPEN TODAY, 3PM TO 5PM$3,550,0005 beds5.5 baths4,901 sq ft2227 77th Ave SE, Mercer Island, WA 98040Grace Yu • The Agency Seattle/Eastside
See all
Provided by Redfin
Sale history for 4520 Ferncroft Rd
$887/sq ft
$938/sq ft
$433/sq ft
$433/sq ft
$468/sq ft
$228/sq ft
$246/sq ft
$35/sq ft
Tax history for 4520 Ferncroft Rd
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
- Public record
- Zoning
R-15
Single-Family Residential District
The purpose of the residential chapter is to identify land uses and to establish development standards that are appropriate within the residential zoning designations. The development standards provide a framework for a site to be developed consistent with the policy direction of the adopted Mercer Island Comprehensive Plan.Include but are not limited to:
- Religious facility
- Housing-Single unit
- Educational/school
- Recreation
- Park & open space
Property details
Parking
- Parking Information
- Covered Spaces: 4
- Parking Features: Attached Carport, Driveway, Detached Garage
- Garage Spaces: 4
- Has Carport
- Has Garage
Interior
- Bedroom Information
- # of Bedrooms: 5
- # of Beds Upper: 1
- # of Bedrooms Main: 2
- # of Beds Lower: 2
- Bedrooms Possible: 5
- Bathroom Information
- # of Full Baths (Total): 2
- # of Three Quarter Baths (Total): 3
- # of Half Baths (Total): 1
- # of Full Baths (Upper): 1
- # of Full Baths (Main): 1
- # of Half Baths (Main): 1
- # of Three Quarter Baths (Main): 1
- # of Three Quarter Baths (Lower): 2
- # of Bathtubs: 2
- # of Showers: 5
- Room 1 Information
- Room Type: Bonus Room
- Room Level: Lower
- Room 2 Information
- Room Type: Den/Office
- Room Level: Main
- Room 3 Information
- Room Type: Dining Room
- Room Level: Main
- Room 4 Information
- Room Type: Entry Hall
- Room Level: Main
- Room 5 Information
- Room Type: Family Room
- Room Level: Lower
- Room 6 Information
- Room Type: Great Room
- Room Level: Main
- Room 7 Information
- Room Type: Kitchen With Eating Space
- Room Level: Main
- Room 8 Information
- Room Type: Living Room
- Room Level: Main
- Room 9 Information
- Room Type: Primary Bedroom
- Room Level: Second
- Room 10 Information
- Room Type: Studio
- Room Level: Lower
- Room 11 Information
- Room Type: Utility Room
- Room Level: Lower
- Room 12 Information
- Room Type: Bathroom Full
- Room Level: Second
- Room 13 Information
- Room Type: Bathroom Full
- Room Level: Main
- Room 14 Information
- Room Type: Bathroom Half
- Room Level: Main
- Room 15 Information
- Room Type: Bathroom Three Quarter
- Room Level: Lower
- Room 16 Information
- Room Type: Bathroom Three Quarter
- Room Level: Lower
- Room 17 Information
- Room Type: Bedroom
- Room Level: Lower
- Room 18 Information
- Room Type: Bathroom Three Quarter
- Room Level: Main
- Room 19 Information
- Room Type: Bedroom
- Room Level: Lower
- Room 20 Information
- Room Type: Bedroom
- Room Level: Main
- Basement Information
- Basement Features: Daylight, Finished
- Fireplace Information
- Has Fireplace
- # of Fireplaces: 3
- Fireplace Features: Gas, Wood Burning
- # of Fireplaces Main: 2
- # of Fireplaces Lower: 1
- Heating & Cooling
- Has Heating
- Heating Information: Forced Air, Heat Pump, Stove/Free Standing, Wall Unit(s)
- Has Cooling
- Cooling Information: Central A/C
- Interior Features
- Interior Features: Hardwood, Wall to Wall Carpet, Dining Room, French Doors, High Tech Cabling, Security System, Skylight(s), SMART Wired, Vaulted Ceiling(s), Walk-In Pantry, Wine Cellar, Fireplace, Water Heater
- Appliances: Double Oven, Dryer, Washer
- Flooring: Hardwood, Marble, Travertine, Carpet
- Appliances Included: Dishwasher,Double Oven,Dryer,Garbage Disposal,Refrigerator,StoveRange,Washer
- Second Living Quarters Information
- ADU # of Beds: 1
- ADU # of Baths: 1
Exterior
- Building Information
- Building Information: Built On Lot
- Roof: Composition
- Exterior Features
- Exterior Features: Stone, Wood
- Property Information
- Energy Source: Electric,Natural Gas
- Sq. Ft. Finished: 4,680
- Style Code: 18 - 2 Stories w/Bsmnt
- Property Type: Residential
- Property Sub Type: Single Family Residence
- Has View
- Land Information
- Vegetation: Garden Space
- Lot Information
- MLS Lot Size Source: KCR
- Site Features: Cable TV,Deck,Fenced-Partially,Gas Available,High Speed Internet,Outbuildings,Patio,Sprinkler System
- Lot Features: Alley, Dead End Street, Paved
- Lot Size Units: Square Feet
- Lot Size Acres: 0.5234
- Elevation Units: Feet
Financial
- Tax Information
- Tax Annual Amount: $22,838
- Tax Year: 2023
- Financial Information
- Listing Terms: Cash Out, Conventional, FHA, VA Loan
- Buyer Financing: Conventional
Utilities
- Utility Information
- Water Source: Public
- Water Company: City of Mercer Island
- Power Company: Puget Sound Energy
- Sewer: Sewer Connected
- Sewer Company: City of Mercer Island
- Water Heater Location: Lower Level (2)
- Water Heater Type: Gas
Location
- School Information
- Elementary School: Island Park Elem
- Middle Or Junior High School: Islander Mid
- High School: Mercer Isl High
- High School District: Mercer Island
- Location Information
- Bus Line Nearby: true
- Directions: From East Mercer Way, turn down Ferncroft lane, then turn Right down private lane to 4520 Ferncroft Road.
- Topography: Level,PartialSlope,Terraces
- Community Information
- Senior Exemption: false
Public facts
- Beds: 4
- Baths: 4.5
- Sq. Ft.: 4,100
- Stories: 1.5
- Lot Size: 0.52 acres
- Style: Single Family Residential
- Year Built: 1934
- Year Renovated: 1979
- County: King County
- APN: 004610 0504
Other
- Listing Information
- Mls Status: Sold
- Listing Date Information
- On Market Date: Friday, September 22, 2023
- Green Information
- Power Production Type: Electric, Natural Gas
- Home Information
- Living Area: 4,680
- Living Area Units: Square Feet
- Calculated Square Footage: 4681
- MLS Square Footage Source: KCR
- Building Area Total: 4680
- Building Area Units: Square Feet
- Foundation Details: Poured Concrete
- Building Name: Mercer Island
- Year Built Effective: 2009
- Effective Year Built Source: Public Records
- Structure Type: House
- Levels: Two
- Entry Location: Main
Around this home
Schools
Public PreK-5 • Assigned • 0.9mi
Public 6-8 • Assigned • 2.1mi
Public 9-12 • Assigned • 0.7mi
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
Minimal risk of a flood reaching the building in the next 30 years
Unlikely to be in a wildfire in next 30 years
7 days above 87° expected this year, 15 days in 30 years
Minimal risk of severe winds over next 30 years
10 unhealthy days expected this year, 12 days in 30 years
Sun exposure
In this area, properties receive around 8.8 hours in June and 1.7 hours in December, placing it below the U.S. average for solar exposure.
Nearby similar homes
New listings for sale in 98040
Home values near 4520 Ferncroft Rd
| Address | Redfin Estimate |
|---|---|
5 Beds | 3.5 Baths | 3520 Sq. Ft. | $5,260,630 |
4 Beds | 2 Baths | 1990 Sq. Ft. | $2,723,140 |
| Address | Redfin Estimate |
|---|---|
5 Beds | 7 Baths | 6279 Sq. Ft. | $11,010,896 |
4 Beds | 4 Baths | 3430 Sq. Ft. | $3,917,778 |
| Address | Redfin Estimate |
|---|---|
6 Beds | 4.5 Baths | 4500 Sq. Ft. | $3,118,217 |
3 Beds | 2.5 Baths | 3550 Sq. Ft. | $2,315,838 |
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