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Single Family ResidenceResidential
$537,715$498 / 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 $515,000 on Nov 20, 2024

31618 9TH PL SW

FEDERAL WAY, WA 98023
3
Beds
1.8
Baths
1,080 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
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

$538K
$502K low$573K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$515,000 · Nov 20, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,398 (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.$527,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$159,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$368,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$446,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$527,000

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.0.17
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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 · 70 ft²

Transaction History(6)

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.

M
Lakota Middle SchoolD
Middle · Grades 6–8 · 0.4 mi
E
Lake Grove Elementary SchoolD-
Elementary · Grades KG–5 · 0.6 mi
H
Federal Way High SchoolD
High · Grades 9–12 · 1.6 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%

Owner Tools

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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

31618 9th Pl Sw 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 83% of homes in King County
  • Costs more per square foot than 97% of homes in Federal Way 98023
  • Smaller than 89% of homes in Federal Way 98023
  • Has a smaller lot than 81% of homes in Mirror Lake
  • Newer than 87% of homes in Mirror Lake

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
$270K$1.2M

This home is worth more than 27% 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$537,715
CheaperTypical $610,681Pricier

Pricier than 27% of homes nearby

Price per ft²$498
CheaperTypical $323Pricier

Pricier than 97% of homes nearby

Living area1,080 ft²
SmallerTypical 1,890 ft²Bigger

Bigger than 11% of homes nearby

Lot size0.17 ac
SmallerTypical 0.2 acBigger

Bigger than 25% of homes nearby

Year built1987
OlderTypical 1979Newer

Newer than 69% of homes nearby

How 31618 9th Pl Sw ranks against every home in each area.
MeasureThis homeMirror LakeFederal Way 98023King County
Estimated valuepricier than$537,71562% of homes27% of homes17% of homes
Price per ft²pricier than$49889% of homes97% of homes48% of homes
Living areabigger than1,080 ft²28% of homes11% of homes16% of homes
Lot sizebigger than0.17 ac19% of homes25% of homes39% of homes
Year builtnewer than198787% of homes69% of homes61% of homes

About 31618 9th Pl Sw

How much is 31618 9th Pl Sw, Federal Way, WA worth?

The TopHap Estimate for 31618 9th Pl Sw, Federal Way, WA is $537,715 as of Sep 24, 2026. The likely range is $502,036 to $573,394. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 31618 9th Pl Sw, Federal Way, WA last sell?

31618 9th Pl Sw, Federal Way, WA last sold on Nov 20, 2024 for $515,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 31618 9th Pl Sw, Federal Way, WA?

31618 9th Pl Sw, Federal Way, WA has 3 bedrooms, 1.8 bathrooms, 1,080 square feet of living space and a 0.17-acre lot.

When was 31618 9th Pl Sw, Federal Way, WA built?

31618 9th Pl Sw, Federal Way, WA was built in 1987, making it 39 years old. The building has 1 story.

What schools serve 31618 9th Pl Sw, Federal Way, WA?

31618 9th Pl Sw, Federal Way, WA is assigned to Lakota Middle School (middle), rated D; Lake Grove Elementary School (elementary), rated D-; Federal Way High School (high), rated D. All sit in Federal Way School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 31618 9th Pl Sw, Federal Way, WA compare to other homes in Federal Way 98023?

Among the 13,913 homes in Federal Way 98023, it is worth more than 27% of them ($537,715 against a typical $610,681), its price per square foot is higher than 97% of them ($498 against a typical $323), it is bigger than 11% of them (1,080 ft² against a typical 1,890 ft²), its lot is bigger than 25% of them (0.17 ac against a typical 0.2 ac) and it is newer than 69% of them (1987 against a typical 1979). Measured against all of King County, it is worth more than 17% 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 31618 9th Pl Sw, Federal Way, WA?

The 2026 property tax bill for 31618 9th Pl Sw, Federal Way, WA was $5,398. The county assessed it at $527,000.

More homes on 9th Pl Sw

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