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Single Family ResidenceResidential
$1,213,403$595 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $270,000 on Feb 25, 2020

23040 SE 21ST ST

SAMMAMISH, WA 98075
4
Beds
1.8
Baths
2,040 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.
1.24 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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.2M
$1.1M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$270,000 · Feb 25, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,173 (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.$1,118,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$813,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$305,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$995,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,118,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyKING
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.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 160 ft²Elevator

Transaction History(5)

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

Foreclosure Filings(1)

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

E
Discovery Elementary SchoolA+
Elementary · Grades KG–5 · 0.2 mi
H
Skyline High SchoolA+
High · Grades 9–12 · 0.6 mi
M
Pine Lake Middle SchoolA+
Middle · Grades 6–8 · 0.8 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

23040 Se 21st 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 less than 89% of homes in Sammamish 98075
  • Costs more per square foot than 69% of homes in King County
  • Smaller than 85% of homes in Sammamish 98075
  • Has a bigger lot than 90% of homes in Sammamish 98075
  • 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
$526K$4M

This home is worth more than 11% 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$1,213,403
CheaperTypical $1,785,366Pricier

Pricier than 11% of homes nearby

Price per ft²$595
CheaperTypical $584Pricier

Pricier than 57% of homes nearby

Living area2,040 ft²
SmallerTypical 3,060 ft²Bigger

Bigger than 15% of homes nearby

Lot size1.24 ac
SmallerTypical 0.26 acBigger

Bigger than 90% of homes nearby

Year built1960
OlderTypical 1999Newer

Newer than 3% of homes nearby

How 23040 Se 21st St ranks against every home in each area.
MeasureThis homeSammamish 98075King County
Estimated valuepricier than$1,213,40311% of homes72% of homes
Price per ft²pricier than$59557% of homes69% of homes
Living areabigger than2,040 ft²15% of homes58% of homes
Lot sizebigger than1.24 ac90% of homes86% of homes
Year builtnewer than19603% of homes30% of homes

About 23040 Se 21st St

How much is 23040 Se 21st St, Sammamish, WA worth?

The TopHap Estimate for 23040 Se 21st St, Sammamish, WA is $1,213,403 as of Sep 24, 2026. The likely range is $1,131,061 to $1,295,745. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 23040 Se 21st St, Sammamish, WA last sell?

23040 Se 21st St, Sammamish, WA last sold on Feb 25, 2020 for $270,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 23040 Se 21st St, Sammamish, WA?

23040 Se 21st St, Sammamish, WA has 4 bedrooms, 1.8 bathrooms and 2,040 square feet of living space.

When was 23040 Se 21st St, Sammamish, WA built?

23040 Se 21st St, Sammamish, WA was built in 1960, making it 66 years old. The building has 1 story.

What schools serve 23040 Se 21st St, Sammamish, WA?

23040 Se 21st St, Sammamish, WA is assigned to Discovery 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 23040 Se 21st St, Sammamish, WA compare to other homes in Sammamish 98075?

Among the 7,995 homes in Sammamish 98075, it is worth more than 11% of them ($1,213,403 against a typical $1,785,366), its price per square foot is higher than 57% of them ($595 against a typical $584), it is bigger than 15% of them (2,040 ft² against a typical 3,060 ft²), its lot is bigger than 90% of them (1.24 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 72% 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 23040 Se 21st St, Sammamish, WA?

The 2026 property tax bill for 23040 Se 21st St, Sammamish, WA was $10,173. The county assessed it at $1,118,000.

More homes on Se 21st St

Closest homes

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Assigned schools

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