Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$789,311$389 / 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 95How 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 $500,000 on Sep 29, 2017

421 SW 129TH ST

BURIEN, WA 98146
4
Beds
1.8
Baths
2,030 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.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1958
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

$789K
$748K low$831K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$500,000 · Sep 29, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,409 (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.$626,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$265,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$361,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$630,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$626,000

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.46 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.0.22
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 · 140 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
Hazel Valley Elementary SchoolB
Elementary · Grades KG–5 · 0.1 mi
M
Cascade Middle SchoolC-
Middle · Grades 6–8 · 1.1 mi
H
Highline High SchoolD-
High · Grades 9–12 · 1.5 mi

District: Highline School District

Neighborhood · ZIP 98146These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.294

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.25%
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.1.4%
PopulationHow many people live in this area.30,787
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,812 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$96,919
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,992
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.39 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.43%

Owner Tools

Do you own this home?
Claim this home

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

421 Sw 129th 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 93% of homes in Evansville
  • Costs less per square foot than 72% of homes in King County
  • Bigger than 82% of homes in Evansville
  • Has a bigger lot than 68% of homes in Seattle 98146
  • Newer than 74% of homes in Evansville

What homes are worth in Seattle 98146

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

This home
$252K$2M

This home is worth more than 66% of homes in Seattle 98146.

How it measures up in Seattle 98146

The dot is this home. The mark in the middle is the typical home in Seattle 98146.

Estimated value$789,311
CheaperTypical $693,461Pricier

Pricier than 66% of homes nearby

Price per ft²$389
CheaperTypical $440Pricier

Pricier than 33% of homes nearby

Living area2,030 ft²
SmallerTypical 1,620 ft²Bigger

Bigger than 69% of homes nearby

Lot size0.22 ac
SmallerTypical 0.19 acBigger

Bigger than 68% of homes nearby

Year built1958
OlderTypical 1956Newer

Newer than 56% of homes nearby

How 421 Sw 129th St ranks against every home in each area.
MeasureThis homeEvansvilleSeattle 98146King County
Estimated valuepricier than$789,31193% of homes66% of homes47% of homes
Price per ft²pricier than$38948% of homes33% of homes28% of homes
Living areabigger than2,030 ft²82% of homes69% of homes57% of homes
Lot sizebigger than0.22 ac66% of homes68% of homes56% of homes
Year builtnewer than195874% of homes56% of homes27% of homes

About 421 Sw 129th St

How much is 421 Sw 129th St, Burien, WA worth?

The TopHap Estimate for 421 Sw 129th St, Burien, WA is $789,311 as of Aug 30, 2026. The likely range is $747,869 to $830,753. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Sw 129th St, Burien, WA last sell?

421 Sw 129th St, Burien, WA last sold on Sep 29, 2017 for $500,000, according to the county's recorded deed.

How big is 421 Sw 129th St, Burien, WA?

421 Sw 129th St, Burien, WA has 4 bedrooms, 1.8 bathrooms, 2,030 square feet of living space and a 0.22-acre lot.

When was 421 Sw 129th St, Burien, WA built?

421 Sw 129th St, Burien, WA was built in 1958, making it 68 years old. The building has 1 story.

What schools serve 421 Sw 129th St, Burien, WA?

421 Sw 129th St, Burien, WA is assigned to Hazel Valley Elementary School (elementary), rated B; Cascade Middle School (middle), rated C-; Highline High School (high), rated D-. All sit in Highline School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Sw 129th St, Burien, WA compare to other homes in Seattle 98146?

Among the 8,258 homes in Seattle 98146, it is worth more than 66% of them ($789,311 against a typical $693,461), its price per square foot is higher than 33% of them ($389 against a typical $440), it is bigger than 69% of them (2,030 ft² against a typical 1,620 ft²), its lot is bigger than 68% of them (0.22 ac against a typical 0.19 ac) and it is newer than 56% of them (1958 against a typical 1956). Measured against all of King County, it is worth more than 47% 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 421 Sw 129th St, Burien, WA?

The 2026 property tax bill for 421 Sw 129th St, Burien, WA was $7,409. The county assessed it at $626,000.

More homes on Sw 129th St

Closest homes

More homes in Burien 98146

Assigned schools

Explore the area

See this home in context

Open 421 Sw 129th St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map