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Single Family ResidenceResidential
$576,031$339 / 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 85How 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 $190,120 on Aug 16, 1999

8525 S 121ST ST

SEATTLE, WA 98178
4
Beds
2.5
Baths
1,700 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.
3,000 ft²
Lot SizeThe size of the land the home sits on, from county records.
1999
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$576K
$491K low$661K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$190,120 · Aug 16, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,987 (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.$621,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$249,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$372,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$638,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$621,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyKING
Lot (acres)The size of the land the home sits on, from county records.0.07
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, Attached
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.Porch · 40 ft²

Transaction History(3)

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
Bryn Mawr Elementary SchoolB-
Elementary · Grades KG–5 · 0.4 mi
M
Dimmitt Middle SchoolB-
Middle · Grades 6–8 · 0.4 mi
H
Renton High SchoolD-
High · Grades 9–12 · 1.0 mi

District: Renton School District

Neighborhood · ZIP 98178These 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.88
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.113
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.285

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.26,556
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,215 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$96,863
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$135,182
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.38 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

8525 S 121st 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 76% of homes in King County
  • Costs less per square foot than 83% of homes in King County
  • Among the smallest lots in Bryn Mawr
  • Newer than 90% of homes in Bryn Mawr

What homes are worth in Seattle 98178

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

This home
$277K$1.3M

This home is worth more than 45% of homes in Seattle 98178.

How it measures up in Seattle 98178

The dot is this home. The mark in the middle is the typical home in Seattle 98178.

Estimated value$576,031
CheaperTypical $596,387Pricier

Pricier than 45% of homes nearby

Price per ft²$339
CheaperTypical $360Pricier

Pricier than 42% of homes nearby

Living area1,700 ft²
SmallerTypical 1,780 ft²Bigger

Bigger than 47% of homes nearby

Lot size3,000 ft²
SmallerTypical 0.17 acBigger

Smaller than almost all homes nearby

Year built1999
OlderTypical 1955Newer

Newer than 88% of homes nearby

How 8525 S 121st St ranks against every home in each area.
MeasureThis homeBryn MawrSeattle 98178King County
Estimated valuepricier than$576,03125% of homes45% of homes24% of homes
Price per ft²pricier than$33931% of homes42% of homes17% of homes
Living areabigger than1,700 ft²38% of homes47% of homes43% of homes
Lot sizebigger than3,000 ft²almost no homesalmost no homes6% of homes
Year builtnewer than199990% of homes88% of homes76% of homes

About 8525 S 121st St

How much is 8525 S 121st St, Seattle, WA worth?

The TopHap Estimate for 8525 S 121st St, Seattle, WA is $576,031 as of Aug 30, 2026. The likely range is $491,468 to $660,594. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8525 S 121st St, Seattle, WA last sell?

8525 S 121st St, Seattle, WA last sold on Aug 16, 1999 for $190,120, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 8525 S 121st St, Seattle, WA?

8525 S 121st St, Seattle, WA has 4 bedrooms, 2.5 bathrooms, 1,700 square feet of living space and a 0.07-acre lot.

When was 8525 S 121st St, Seattle, WA built?

8525 S 121st St, Seattle, WA was built in 1999, making it 27 years old. The building has 2 stories.

What schools serve 8525 S 121st St, Seattle, WA?

8525 S 121st St, Seattle, WA is assigned to Bryn Mawr Elementary School (elementary), rated B-; Dimmitt Middle School (middle), rated B-; Renton High School (high), rated D-. All sit in Renton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 8525 S 121st St, Seattle, WA compare to other homes in Seattle 98178?

Among the 7,748 homes in Seattle 98178, it is worth more than 45% of them ($576,031 against a typical $596,387), its price per square foot is higher than 42% of them ($339 against a typical $360), it is bigger than 47% of them (1,700 ft² against a typical 1,780 ft²), its lot is bigger than almost none of them (3,000 ft² against a typical 0.17 ac) and it is newer than 88% of them (1999 against a typical 1955). Measured against all of King County, it is worth more than 24% 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 8525 S 121st St, Seattle, WA?

The 2026 property tax bill for 8525 S 121st St, Seattle, WA was $3,987. The county assessed it at $621,000.

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