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Single Family ResidenceResidential
$626,965$276 / 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 90How 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 $156,600 on Mar 4, 1991

4020 SW 321ST ST

FEDERAL WAY, WA 98023
4
Beds
1.8
Baths
2,270 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1972
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

$627K
$567K low$687K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$156,600 · Mar 4, 1991

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,369 (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.$231,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$390,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$602,000
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

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.42 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

Scores 0–100; higher = greater projected risk.

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.0.18
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 · 80 ft²

Transaction History(1)

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
Twin Lakes Elementary SchoolA-
Elementary · Grades KG–5 · 0.3 mi
H
Decatur High SchoolC-
High · Grades 9–12 · 0.8 mi
M
Lakota Middle SchoolC+
Middle · Grades 6–8 · 1.4 mi

District: Federal Way School District

Neighborhood · ZIP 98023These 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.63
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 100.255

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.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.5%
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.52,813
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,507 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$98,962
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$120,405
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.41 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

4020 Sw 321st 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 72% of homes in Twin Lakes
  • Costs less per square foot than 93% of homes in King County
  • Bigger than 77% of homes in Twin Lakes
  • Has a smaller lot than 65% of homes in Federal Way 98023
  • Older than 74% of homes in Federal Way 98023

What homes are worth in Federal Way 98023

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

This home
$244K$1.1M

This home is worth more than 62% of homes in Federal Way 98023.

How it measures up in Federal Way 98023

The dot is this home. The mark in the middle is the typical home in Federal Way 98023.

Estimated value$626,965
CheaperTypical $591,123Pricier

Pricier than 62% of homes nearby

Price per ft²$276
CheaperTypical $314Pricier

Pricier than 26% of homes nearby

Living area2,270 ft²
SmallerTypical 1,890 ft²Bigger

Bigger than 70% of homes nearby

Lot size0.18 ac
SmallerTypical 0.2 acBigger

Bigger than 35% of homes nearby

Year built1972
OlderTypical 1979Newer

Newer than 26% of homes nearby

How 4020 Sw 321st St ranks against every home in each area.
MeasureThis homeTwin LakesFederal Way 98023King County
Estimated valuepricier than$626,96572% of homes62% of homes30% of homes
Price per ft²pricier than$27626% of homes26% of homes7% of homes
Living areabigger than2,270 ft²77% of homes70% of homes66% of homes
Lot sizebigger than0.18 ac36% of homes35% of homes43% of homes
Year builtnewer than197230% of homes26% of homes43% of homes

About 4020 Sw 321st St

How much is 4020 Sw 321st St, Federal Way, WA worth?

The TopHap Estimate for 4020 Sw 321st St, Federal Way, WA is $626,965 as of Aug 30, 2026. The likely range is $566,604 to $687,326. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4020 Sw 321st St, Federal Way, WA last sell?

4020 Sw 321st St, Federal Way, WA last sold on Mar 4, 1991 for $156,600, according to the county's recorded deed.

How big is 4020 Sw 321st St, Federal Way, WA?

4020 Sw 321st St, Federal Way, WA has 4 bedrooms, 1.8 bathrooms, 2,270 square feet of living space and a 0.18-acre lot.

When was 4020 Sw 321st St, Federal Way, WA built?

4020 Sw 321st St, Federal Way, WA was built in 1972, making it 54 years old. The building has 1 story.

What schools serve 4020 Sw 321st St, Federal Way, WA?

4020 Sw 321st St, Federal Way, WA is assigned to Twin Lakes Elementary School (elementary), rated A-; Decatur High School (high), rated C-; Lakota Middle School (middle), rated C+. All sit in Federal Way School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4020 Sw 321st St, Federal Way, WA compare to other homes in Federal Way 98023?

Among the 13,923 homes in Federal Way 98023, it is worth more than 62% of them ($626,965 against a typical $591,123), its price per square foot is higher than 26% of them ($276 against a typical $314), it is bigger than 70% of them (2,270 ft² against a typical 1,890 ft²), its lot is bigger than 35% of them (0.18 ac against a typical 0.2 ac) and it is newer than 26% of them (1972 against a typical 1979). Measured against all of King County, it is worth more than 30% 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 4020 Sw 321st St, Federal Way, WA?

The 2026 property tax bill for 4020 Sw 321st St, Federal Way, WA was $6,369. The county assessed it at $621,000.

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