Sold329d on market
9505 SE 43rd Street
Mercer Island, WA, 98040 • 98040 • King County
$2,200,000
$772/sqft
4Beds
3Baths
2,850Sqft
0.45 acLot
1969Built
Property DNA
Territorial Views
Territorial
Modern Style
Built 1969 · 57 years of history
East Mercer
98040
Outdoor Living
Bath Off Primary · Double Pane/Storm Window · Dining Room · Fireplace · Hot Tub/Spa · Water Heater
1 Fireplace
Gas · Main Level: 1 · Fireplace
2-Car Garage
Attached Garage
Hardwood Floors
Quality flooring throughout
This home is in high demand
Listed 329 days ago · 28 views · Top 1% likely to sell soon
Market activity
Demand and pricing signals for this listing
28 views
People checking out this listing
329 days on market
Established listing
$772/sqft
Price per square foot
Selling Soon Prediction
Very HighThis home ranks in the top 1% of listings most likely to go under contract soon, based on market activity and demand signals.
Likelihood score
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About this home
Single Family · Built 1969
Perched on a shy half-acre private lot, this architecturally significant mid-century modern home is a true masterpiece. Designed by renowned architect Peder H. Knudson, the home is a showcase of design and sophistication. It features striking floor-to-ceiling walls of windows that flood the interiors with natural light, along with multiple decks that seamlessly connect indoors and outdoor living. Its eclectic charm creates a calming, natural vibe. Surrounded by a Zen-like, park-like tranquility, this urban oasis has filtered water views from the main deck, where soaring eagles abound. The peaceful setting, on a dead-end street, secluded from neighbors, provides the perfect space to entertain or embrace a slower, more mindful lifestyle.
Standout features identified
Our analysis highlights secluded from neighbors, shy half-acre private lot, and multiple decks as key attractions of this home.
Estimated monthly payment
Based on current rates
$13,699/month
Principal & Interest$10,766
Property Tax$2,200
Insurance$733
Down payment20% ($440,000)
3%50%
Est. 6.19% rate · 30yr fixed · $1,760,000 loan
Full calculator →At a glance
Key facts and listing details
TypeSingle Family Residence
Year Built1969
HeatingFireplace, Forced Air, Heat Pump, Electric, Natural Gas, Wood
CoolingForced Air
Parking2 Attached Garage spaces
Lot0.45 Acres
Property
Home typeSingle Family
Sub-typeSingle Family Residence
StyleModern
Year built1969
Stories1
Systems
HeatingFireplace, Forced Air, Heat Pump, Electric, Natural Gas, Wood
CoolingForced Air
RoofTorch Down
ConstructionWood Siding, Wood Products
Water / SewerPublic, Company: City of Mercer Island / Sewer Connected, Company: City of Mercer Island
Parking & Outdoor
ParkingAttached Garage
Garage2 spaces
BasementDaylight,Finished
Fireplaces1
Lot0.45 Acres
Location & Tax
Neighborhood98040
Annual tax$12,616
Parcel0046100013
Bathrooms & Fees
Full baths2
Features & details
12 categories of property features
Interior Features
Interior
Bath Off Primary
Dining Room
Appliances
Dishwasher(s)
Disposal
Dryer(s)
Microwave(s)
Refrigerator(s)
Stove(s)/Range(s)
Washer(s)
Garbage Disposal
Water Heater: Gas
Water Heater Location: Lower Level Mechanical Room
Flooring
Hardwood
Slate
Carpet
Heating
Fireplace
Forced Air
Heat Pump
Electric
Natural Gas
Wood
Cooling
Forced Air
Fireplace
Gas
Main Level: 1
Fireplace
Windows
Double Pane/Storm Window
Exterior Features
Parking
Attached Garage
Construction
Wood Siding
Wood Products
Patio & Porch
Bath Off Primary
Double Pane/Storm Window
Dining Room
Fireplace
Hot Tub/Spa
Water Heater
Lot Features
Cul-De-Sac
Dead End Street
Drought Resistant Landscape
Paved
Secluded
Cable TV
Deck
Gas Available
High Speed Internet
Hot Tub/Spa
Patio
Views
Territorial
Room details
15 rooms detailed
Master Bedroom
LowerBedroom
LowerBedroom
LowerBedroom
LowerBathroom Full
LowerBathroom Full
LowerListing insights
Market data and value estimates
StatusSold
Days on market329
Est. value$2,184,300
Est. rent$5,169/mo
Tax rate0.82%
Price/sqft$772
On marketJun 9, 2025
PostedApr 11, 2025
Last sold$2,200,000
MLS statusSold
MLS updatedJun 12, 2025
Tour days6
Views28
How are the schools in Mercer Island?
3 schools rated nearby
Location
Mercer Island, WA, 98040
Price history
7 events
DateEventPrice$/sqftSource
May 12, 2025Sold$2,200,000$772NWMLS as distributed by MLS GRID
Apr 13, 2025Pending Sale$2,200,000$772NWMLS as distributed by MLS GRID
Apr 11, 2025Listed For Sale$2,200,000$772NWMLS as distributed by MLS GRID
Nov 10, 2015Sold$1,345,000$472NWMLS as distributed by MLS GRID
Sep 19, 2015Listed For Sale$1,150,000$404Ewing & Clark, Inc.
Sep 2, 2005Sold$999,950$351NWMLS as distributed by MLS GRID
Oct 7, 1997Sold$385,000$135Public Record
Sold$2,200,000
May 12, 2025•$772/sqft•NWMLS as distributed by MLS GRID
Pending Sale$2,200,000
Apr 13, 2025•$772/sqft•NWMLS as distributed by MLS GRID
Listed For Sale$2,200,000
Apr 11, 2025•$772/sqft•NWMLS as distributed by MLS GRID
Sold$1,345,000
Nov 10, 2015•$472/sqft•NWMLS as distributed by MLS GRID
Listed For Sale$1,150,000
Sep 19, 2015•$404/sqft•Ewing & Clark, Inc.
Sold$999,950
Sep 2, 2005•$351/sqft•NWMLS as distributed by MLS GRID
Sold$385,000
Oct 7, 1997•$135/sqft•Public Record
Tax history
21 years of records
YearTax paidAssessed value
Apr 7, 2024$12,773$1,949,000
Apr 7, 2023$12,616$1,831,000
Apr 7, 2022—$2,048,000
Apr 7, 2021$10,997$1,492,000
Apr 7, 2020$10,560$1,318,000
Apr 7, 2019$11,423$1,445,000
Apr 7, 2018$10,641$1,415,000
Apr 7, 2017$11,085$1,277,000
Apr 7, 2016$8,186$1,278,000
Apr 7, 2015$8,186$1,015,000
Apr 7, 2014$8,186$935,000
Apr 7, 2013$8,186$791,000
Apr 7, 2012—$730,000
Apr 7, 2011—$721,000
Apr 7, 2010—$779,000
Apr 7, 2009—$779,000
Apr 7, 2007—$612,000
Apr 7, 2006—$568,000
Apr 7, 2005—$518,000
Apr 7, 2001$4,075$426,000
Apr 7, 2000$4,077$386,000
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 14:23:56 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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