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Single Family ResidenceResidential
$1,396,837$772 / 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 94How 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 $915,000 on May 5, 2020

3909 SW 109TH ST

SEATTLE, WA 98146
3
Beds
1.8
Baths
1,810 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.
1947
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

$1.4M
$1.3M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$915,000 · May 5, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,324 (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.$1,244,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$859,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$385,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,186,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,244,000

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
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
ViewThe type of view from the property, or another feature of the site that affects value.Water View
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 350 ft²

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.

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

E
Arbor Heights Elementary SchoolA-
Elementary · Grades PK–5 · 0.3 mi
H
Chief Sealth International High SchoolC-
High · Grades 9–12 · 1.8 mi
M
Denny International Middle SchoolB+
Middle · Grades 6–8 · 1.9 mi

District: Seattle 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

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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

3909 Sw 109th 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 94% of homes in Seattle 98146
  • Costs more per square foot than 96% of homes in Seattle 98146
  • Has a smaller lot than 67% of homes in Seattle 98146
  • Older than 82% of homes in King County

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
$280K$2.1M

This home is worth more than 94% 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$1,396,837
CheaperTypical $686,489Pricier

Pricier than 94% of homes nearby

Price per ft²$772
CheaperTypical $438Pricier

Pricier than 96% of homes nearby

Living area1,810 ft²
SmallerTypical 1,630 ft²Bigger

Bigger than 59% of homes nearby

Lot size0.17 ac
SmallerTypical 0.19 acBigger

Bigger than 33% of homes nearby

Year built1947
OlderTypical 1956Newer

Newer than 25% of homes nearby

How 3909 Sw 109th St ranks against every home in each area.
MeasureThis homeFauntleroySeattle 98146King County
Estimated valuepricier than$1,396,83772% of homes94% of homes79% of homes
Price per ft²pricier than$77290% of homes96% of homes90% of homes
Living areabigger than1,810 ft²41% of homes59% of homes48% of homes
Lot sizebigger than0.17 ac64% of homes33% of homes39% of homes
Year builtnewer than194730% of homes25% of homes18% of homes

About 3909 Sw 109th St

How much is 3909 Sw 109th St, Seattle, WA worth?

The TopHap Estimate for 3909 Sw 109th St, Seattle, WA is $1,396,837 as of Sep 24, 2026. The likely range is $1,311,894 to $1,481,780. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3909 Sw 109th St, Seattle, WA last sell?

3909 Sw 109th St, Seattle, WA last sold on May 5, 2020 for $915,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 3909 Sw 109th St, Seattle, WA?

3909 Sw 109th St, Seattle, WA has 3 bedrooms, 1.8 bathrooms, 1,810 square feet of living space and a 0.17-acre lot.

When was 3909 Sw 109th St, Seattle, WA built?

3909 Sw 109th St, Seattle, WA was built in 1947, making it 79 years old. The building has 1 story.

What schools serve 3909 Sw 109th St, Seattle, WA?

3909 Sw 109th St, Seattle, WA is assigned to Arbor Heights Elementary School (elementary), rated A-; Chief Sealth International High School (high), rated C-; Denny International Middle School (middle), rated B+. All sit in Seattle School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3909 Sw 109th St, Seattle, WA compare to other homes in Seattle 98146?

Among the 8,258 homes in Seattle 98146, it is worth more than 94% of them ($1,396,837 against a typical $686,489), its price per square foot is higher than 96% of them ($772 against a typical $438), it is bigger than 59% of them (1,810 ft² against a typical 1,630 ft²), its lot is bigger than 33% of them (0.17 ac against a typical 0.19 ac) and it is newer than 25% of them (1947 against a typical 1956). Measured against all of King County, it is worth more than 79% 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 3909 Sw 109th St, Seattle, WA?

The 2026 property tax bill for 3909 Sw 109th St, Seattle, WA was $13,324. The county assessed it at $1,244,000.

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