Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,150,364$449 / 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 88How 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 $125,000 on Dec 1, 1999

20815 WESTSIDE HWY SW

VASHON, WA 98070
3
Beds
2.3
Baths
2,560 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.
3.47 ac
Lot SizeThe size of the land the home sits on, from county records.
2008
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

$1.2M
$1M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$125,000 · Dec 1, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,160 (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.$1,004,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$253,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$751,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,037,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,004,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyKING
HeatingThe type of heating system in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.Elevator

Transaction History(4)

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.

H
Vashon Island High SchoolA+
High · Grades 9–12 · 2.2 mi
M
McMurray Middle SchoolA
Middle · Grades 6–8 · 2.4 mi
E
Chautauqua Elementary SchoolA-
Elementary · Grades PK–5 · 2.5 mi

District: Vashon Island School District

Neighborhood · ZIP 98070These 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.152
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.263

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.83%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.11,184
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.225 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,056
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$140,428
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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

20815 Westside Hwy 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 more than 72% of homes in Vashon 98070
  • Costs less per square foot than 80% of homes in Mid Vashon
  • Bigger than 79% of homes in Vashon 98070
  • Has a bigger lot than 92% of homes in King County
  • Newer than 94% of homes in Vashon 98070

What homes are worth in Vashon 98070

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

This home
$431K$2.1M

This home is worth more than 72% of homes in Vashon 98070.

How it measures up in Vashon 98070

The dot is this home. The mark in the middle is the typical home in Vashon 98070.

Estimated value$1,150,364
CheaperTypical $938,752Pricier

Pricier than 72% of homes nearby

Price per ft²$449
CheaperTypical $537Pricier

Pricier than 26% of homes nearby

Living area2,560 ft²
SmallerTypical 1,790 ft²Bigger

Bigger than 79% of homes nearby

Lot size3.47 ac
SmallerTypical 1.01 acBigger

Bigger than 75% of homes nearby

Year built2008
OlderTypical 1972Newer

Newer than 94% of homes nearby

How 20815 Westside Hwy Sw ranks against every home in each area.
MeasureThis homeMid VashonVashon 98070King County
Estimated valuepricier than$1,150,36461% of homes72% of homes69% of homes
Price per ft²pricier than$44920% of homes26% of homes38% of homes
Living areabigger than2,560 ft²75% of homes79% of homes75% of homes
Lot sizebigger than3.47 ac67% of homes75% of homes92% of homes
Year builtnewer than200893% of homes94% of homes88% of homes

About 20815 Westside Hwy Sw

How much is 20815 Westside Hwy Sw, Vashon, WA worth?

The TopHap Estimate for 20815 Westside Hwy Sw, Vashon, WA is $1,150,364 as of Sep 24, 2026. The likely range is $1,006,594 to $1,294,134. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20815 Westside Hwy Sw, Vashon, WA last sell?

20815 Westside Hwy Sw, Vashon, WA last sold on Dec 1, 1999 for $125,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 20815 Westside Hwy Sw, Vashon, WA?

20815 Westside Hwy Sw, Vashon, WA has 3 bedrooms, 2.3 bathrooms and 2,560 square feet of living space.

When was 20815 Westside Hwy Sw, Vashon, WA built?

20815 Westside Hwy Sw, Vashon, WA was built in 2008, making it 18 years old. The building has 1 story.

What schools serve 20815 Westside Hwy Sw, Vashon, WA?

20815 Westside Hwy Sw, Vashon, WA is assigned to Vashon Island High School (high), rated A+; McMurray Middle School (middle), rated A; Chautauqua Elementary School (elementary), rated A-. All sit in Vashon Island School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20815 Westside Hwy Sw, Vashon, WA compare to other homes in Vashon 98070?

Among the 5,181 homes in Vashon 98070, it is worth more than 72% of them ($1,150,364 against a typical $938,752), its price per square foot is higher than 26% of them ($449 against a typical $537), it is bigger than 79% of them (2,560 ft² against a typical 1,790 ft²), its lot is bigger than 75% of them (3.47 ac against a typical 1.01 ac) and it is newer than 94% of them (2008 against a typical 1972). Measured against all of King County, it is worth more than 69% 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 20815 Westside Hwy Sw, Vashon, WA?

The 2026 property tax bill for 20815 Westside Hwy Sw, Vashon, WA was $11,160. The county assessed it at $1,004,000.

More homes on Westside Hwy Sw

Closest homes

More homes in Vashon 98070

Assigned schools

Explore the area

See this home in context

Open 20815 Westside Hwy Sw 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