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Single Family ResidenceResidential
$2,764,101$1,147 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 89How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $2,800,000 on Sep 15, 2025

21905 SE 20TH ST

SAMMAMISH, WA 98075
3
Beds
3.5
Baths
2,410 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
1.85 ac
Lot SizeThe size of the land the home sits on, from county records.
1960
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2.8M
$2.5M low$3.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,800,000 · Sep 15, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$19,439 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$2,192,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,326,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$866,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,950,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,192,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyKING
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1989
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Lake
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 220 ft²ElevatorPorch · 190 ft²Boat access

Transaction History(4)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Creekside Elementary SchoolA+
Elementary · Grades KG–5 · 0.8 mi
H
Skyline High SchoolA+
High · Grades 9–12 · 1.0 mi
M
Pine Lake Middle SchoolA
Middle · Grades 6–8 · 1.0 mi

District: Issaquah School District

Neighborhood · ZIP 98075These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.21
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.112
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.270

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.26,781
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,106 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$199,615
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$239,168
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.43%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

21905 Se 20th St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth more than 97% of homes in King County
  • Among the highest price per square foot in King County
  • Smaller than 75% of homes in Sammamish 98075
  • Has a bigger lot than 97% of homes in Pine Lake
  • Older than 97% of homes in Sammamish 98075

What homes are worth in Sammamish 98075

Each bar is how many homes fall in that price range. The marker is this home.

This home
$519K$3.5M

This home is worth more than 96% of homes in Sammamish 98075.

How it measures up in Sammamish 98075

The dot is this home. The mark in the middle is the typical home in Sammamish 98075.

Estimated value$2,764,101
CheaperTypical $1,722,315Pricier

Pricier than 96% of homes nearby

Price per ft²$1147
CheaperTypical $566Pricier

Pricier than 98% of homes nearby

Living area2,410 ft²
SmallerTypical 3,060 ft²Bigger

Bigger than 25% of homes nearby

Lot size1.85 ac
SmallerTypical 0.26 acBigger

Bigger than 92% of homes nearby

Year built1960
OlderTypical 1999Newer

Newer than 3% of homes nearby

How 21905 Se 20th St ranks against every home in each area.
MeasureThis homePine LakeSammamish 98075King County
Estimated valuepricier than$2,764,10193% of homes96% of homes97% of homes
Price per ft²pricier than$114798% of homes98% of homesalmost all homes
Living areabigger than2,410 ft²34% of homes25% of homes71% of homes
Lot sizebigger than1.85 ac97% of homes92% of homes88% of homes
Year builtnewer than196013% of homes3% of homes29% of homes

About 21905 Se 20th St

How much is 21905 Se 20th St, Sammamish, WA worth?

The TopHap Estimate for 21905 Se 20th St, Sammamish, WA is $2,764,101 as of Aug 30, 2026. The likely range is $2,455,337 to $3,072,864. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21905 Se 20th St, Sammamish, WA last sell?

21905 Se 20th St, Sammamish, WA last sold on Sep 15, 2025 for $2,800,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21905 Se 20th St, Sammamish, WA?

21905 Se 20th St, Sammamish, WA has 3 bedrooms, 3.5 bathrooms and 2,410 square feet of living space.

When was 21905 Se 20th St, Sammamish, WA built?

21905 Se 20th St, Sammamish, WA was built in 1960, making it 66 years old. The building has 1 story.

What schools serve 21905 Se 20th St, Sammamish, WA?

21905 Se 20th St, Sammamish, WA is assigned to Creekside Elementary School (elementary), rated A+; Skyline High School (high), rated A+; Pine Lake Middle School (middle), rated A. All sit in Issaquah School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21905 Se 20th St, Sammamish, WA compare to other homes in Sammamish 98075?

Among the 7,994 homes in Sammamish 98075, it is worth more than 96% of them ($2,764,101 against a typical $1,722,315), its price per square foot is higher than 98% of them ($1147 against a typical $566), it is bigger than 25% of them (2,410 ft² against a typical 3,060 ft²), its lot is bigger than 92% of them (1.85 ac against a typical 0.26 ac) and it is newer than 3% of them (1960 against a typical 1999). Measured against all of King County, it is worth more than 97% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 21905 Se 20th St, Sammamish, WA?

The 2026 property tax bill for 21905 Se 20th St, Sammamish, WA was $19,439. The county assessed it at $2,192,000.

More homes on Se 20th St

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Assigned schools

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