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Single Family ResidenceResidential
$762,622$454 / 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 Aug 30, 2026

28808 NE BIG ROCK RD

DUVALL, WA 98019
4
Beds
1
Baths
1,680 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.
9.97 ac
Lot SizeThe size of the land the home sits on, from county records.
1934
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$763K
$718K low$807K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,689 (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.$710,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$527,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$183,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$660,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$710,000

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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%

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
HeatingThe type of heating system in the home.Floor/Wall Furnace
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.ElevatorPorch · 100 ft²

Transaction History(2)

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
Cedarcrest High SchoolA+
High · Grades 9–12 · 1.2 mi
E
Stillwater Elementary SchoolA+
Elementary · Grades KG–5 · 2.4 mi
M
Tolt Middle SchoolB
Middle · Grades 6–8 · 5.6 mi

District: Riverview School District

Neighborhood · ZIP 98019These 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.32
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.242

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.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.4%
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.13,767
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.144 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$150,790
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$162,530
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.66 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

28808 Ne Big Rock Rd 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 79% of homes in Duvall 98019
  • Smaller than 77% of homes in Duvall 98019
  • Has a bigger lot than 98% of homes in King County
  • Older than 97% of homes in Duvall 98019

What homes are worth in Duvall 98019

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

This home
$452K$1.6M

This home is worth more than 21% of homes in Duvall 98019.

How it measures up in Duvall 98019

The dot is this home. The mark in the middle is the typical home in Duvall 98019.

Estimated value$762,622
CheaperTypical $931,433Pricier

Pricier than 21% of homes nearby

Price per ft²$454
CheaperTypical $428Pricier

Pricier than 64% of homes nearby

Living area1,680 ft²
SmallerTypical 2,220 ft²Bigger

Bigger than 23% of homes nearby

Lot size9.97 ac
SmallerTypical 0.32 acBigger

Bigger than 96% of homes nearby

Year built1934
OlderTypical 1998Newer

Newer than 3% of homes nearby

How 28808 Ne Big Rock Rd ranks against every home in each area.
MeasureThis homeDuvall 98019King County
Estimated valuepricier than$762,62221% of homes45% of homes
Price per ft²pricier than$45464% of homes42% of homes
Living areabigger than1,680 ft²23% of homes43% of homes
Lot sizebigger than9.97 ac96% of homes98% of homes
Year builtnewer than19343% of homes11% of homes

About 28808 Ne Big Rock Rd

How much is 28808 Ne Big Rock Rd, Duvall, WA worth?

The TopHap Estimate for 28808 Ne Big Rock Rd, Duvall, WA is $762,622 as of Aug 30, 2026. The likely range is $718,165 to $807,079. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 28808 Ne Big Rock Rd, Duvall, WA last sell?

28808 Ne Big Rock Rd, Duvall, WA last sold on Jan 21, 1983, according to the county's recorded deed.

How big is 28808 Ne Big Rock Rd, Duvall, WA?

28808 Ne Big Rock Rd, Duvall, WA has 4 bedrooms, 1 bathrooms and 1,680 square feet of living space.

When was 28808 Ne Big Rock Rd, Duvall, WA built?

28808 Ne Big Rock Rd, Duvall, WA was built in 1934, making it 92 years old. The building has 1 story.

What schools serve 28808 Ne Big Rock Rd, Duvall, WA?

28808 Ne Big Rock Rd, Duvall, WA is assigned to Cedarcrest High School (high), rated A+; Stillwater Elementary School (elementary), rated A+; Tolt Middle School (middle), rated B. All sit in Riverview School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 28808 Ne Big Rock Rd, Duvall, WA compare to other homes in Duvall 98019?

Among the 4,672 homes in Duvall 98019, it is worth more than 21% of them ($762,622 against a typical $931,433), its price per square foot is higher than 64% of them ($454 against a typical $428), it is bigger than 23% of them (1,680 ft² against a typical 2,220 ft²), its lot is bigger than 96% of them (9.97 ac against a typical 0.32 ac) and it is newer than 3% of them (1934 against a typical 1998). Measured against all of King County, it is worth more than 45% 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 28808 Ne Big Rock Rd, Duvall, WA?

The 2026 property tax bill for 28808 Ne Big Rock Rd, Duvall, WA was $7,689. The county assessed it at $710,000.

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