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Single Family ResidenceResidential
$1,012,034$872 / 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 87How 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 $1,005,000 on Jul 14, 2026

8430 SW QUARTERMASTER DR

VASHON, WA 98070
2
Beds
2.3
Baths
1,160 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.
1.81 ac
Lot SizeThe size of the land the home sits on, from county records.
1943
Year BuiltThe year the home was originally built, according to county records.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1M
$883K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,005,000 · Jul 14, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,087 (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.$904,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$442,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$462,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$881,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$904,000

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.Heat Pump
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.Elevator

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.

H
Vashon Island High SchoolA+
High · Grades 9–12 · 1.4 mi
E
Chautauqua Elementary SchoolA-
Elementary · Grades PK–5 · 1.5 mi
M
McMurray Middle SchoolA
Middle · Grades 6–8 · 1.6 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%

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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

8430 Sw Quartermaster Dr 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.

  • Costs more per square foot than 94% of homes in King County
  • Smaller than 84% of homes in Mid Vashon
  • Has a bigger lot than 89% of homes in King County
  • Older than 85% of homes in King County

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
$426K$2.1M

This home is worth more than 59% 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$1,012,034
CheaperTypical $936,146Pricier

Pricier than 59% of homes nearby

Price per ft²$872
CheaperTypical $536Pricier

Pricier than 93% of homes nearby

Living area1,160 ft²
SmallerTypical 1,790 ft²Bigger

Bigger than 20% of homes nearby

Lot size1.81 ac
SmallerTypical 1 acBigger

Bigger than 61% of homes nearby

Year built1943
OlderTypical 1971Newer

Newer than 27% of homes nearby

How 8430 Sw Quartermaster Dr ranks against every home in each area.
MeasureThis homeMid VashonVashon 98070King County
Estimated valuepricier than$1,012,03445% of homes59% of homes61% of homes
Price per ft²pricier than$87289% of homes93% of homes94% of homes
Living areabigger than1,160 ft²16% of homes20% of homes19% of homes
Lot sizebigger than1.81 ac50% of homes61% of homes89% of homes
Year builtnewer than194326% of homes27% of homes15% of homes

About 8430 Sw Quartermaster Dr

How much is 8430 Sw Quartermaster Dr, Vashon, WA worth?

The TopHap Estimate for 8430 Sw Quartermaster Dr, Vashon, WA is $1,012,034 as of Sep 24, 2026. The likely range is $882,577 to $1,141,491. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8430 Sw Quartermaster Dr, Vashon, WA last sell?

8430 Sw Quartermaster Dr, Vashon, WA last sold on Jul 14, 2026 for $1,005,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 8430 Sw Quartermaster Dr, Vashon, WA?

8430 Sw Quartermaster Dr, Vashon, WA has 2 bedrooms, 2.3 bathrooms and 1,160 square feet of living space.

When was 8430 Sw Quartermaster Dr, Vashon, WA built?

8430 Sw Quartermaster Dr, Vashon, WA was built in 1943, making it 83 years old.

What schools serve 8430 Sw Quartermaster Dr, Vashon, WA?

8430 Sw Quartermaster Dr, Vashon, WA is assigned to Vashon Island High School (high), rated A+; Chautauqua Elementary School (elementary), rated A-; McMurray Middle School (middle), rated A. All sit in Vashon Island School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 8430 Sw Quartermaster Dr, Vashon, WA compare to other homes in Vashon 98070?

Among the 5,181 homes in Vashon 98070, it is worth more than 59% of them ($1,012,034 against a typical $936,146), its price per square foot is higher than 93% of them ($872 against a typical $536), it is bigger than 20% of them (1,160 ft² against a typical 1,790 ft²), its lot is bigger than 61% of them (1.81 ac against a typical 1 ac) and it is newer than 27% of them (1943 against a typical 1971). Measured against all of King County, it is worth more than 61% 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 8430 Sw Quartermaster Dr, Vashon, WA?

The 2026 property tax bill for 8430 Sw Quartermaster Dr, Vashon, WA was $10,087. The county assessed it at $904,000.

More homes on Sw Quartermaster Dr

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Assigned schools

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