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Single Family ResidenceResidential
$639,410$229 / 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 89How 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

186 GASSMAN RD

CASTLE ROCK, WA 98611
5
Beds
3
Baths
2,796 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.
1.3 ac
Lot SizeThe size of the land the home sits on, from county records.
1980
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

$639K
$572K low$707K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,272 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$638,470 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$64,270
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$574,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$631,070
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$638,470

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCowlitz
Lot (acres)The size of the land the home sits on, from county records.1.30
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
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

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

H
Castle Rock High SchoolD+
High · Grades 9–12 · 1.0 mi
M
Castle Rock Middle SchoolC-
Middle · Grades 6–8 · 1.8 mi
E
Castle Rock Elementary SchoolD+
Elementary · Grades PK–5 · 1.9 mi

District: Castle Rock School District

Neighborhood · ZIP 98611These 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.85
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.172

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.12%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.0%
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.10,313
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.84 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$81,330
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$96,543
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.61 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.35%

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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

186 Gassman 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 more than 87% of homes in Cowlitz County
  • Costs less per square foot than 84% of homes in Castle Rock 98611
  • Bigger than 95% of homes in Cowlitz County
  • Has a smaller lot than 73% of homes in Castle Rock 98611

What homes are worth in Castle Rock 98611

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

This home
$217K$882K

This home is worth more than 82% of homes in Castle Rock 98611.

How it measures up in Castle Rock 98611

The dot is this home. The mark in the middle is the typical home in Castle Rock 98611.

Estimated value$639,410
CheaperTypical $467,213Pricier

Pricier than 82% of homes nearby

Price per ft²$229
CheaperTypical $293Pricier

Pricier than 16% of homes nearby

Living area2,796 ft²
SmallerTypical 1,572 ft²Bigger

Bigger than 94% of homes nearby

Lot size1.3 ac
SmallerTypical 2.65 acBigger

Bigger than 27% of homes nearby

Year built1980
OlderTypical 1980Newer

Newer than 50% of homes nearby

How 186 Gassman Rd ranks against every home in each area.
MeasureThis homeCastle Rock 98611Cowlitz County
Estimated valuepricier than$639,41082% of homes87% of homes
Price per ft²pricier than$22916% of homes18% of homes
Living areabigger than2,796 ft²94% of homes95% of homes
Lot sizebigger than1.3 ac27% of homes53% of homes
Year builtnewer than198050% of homes58% of homes

About 186 Gassman Rd

How much is 186 Gassman Rd, Castle Rock, WA worth?

The TopHap Estimate for 186 Gassman Rd, Castle Rock, WA is $639,410 as of Sep 24, 2026. The likely range is $571,594 to $707,226. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 186 Gassman Rd, Castle Rock, WA?

186 Gassman Rd, Castle Rock, WA has 5 bedrooms, 3 bathrooms, 2,796 square feet of living space and a 1.30-acre lot.

When was 186 Gassman Rd, Castle Rock, WA built?

186 Gassman Rd, Castle Rock, WA was built in 1980, making it 46 years old. The building has 1 story.

What schools serve 186 Gassman Rd, Castle Rock, WA?

186 Gassman Rd, Castle Rock, WA is assigned to Castle Rock High School (high), rated D+; Castle Rock Middle School (middle), rated C-; Castle Rock Elementary School (elementary), rated D+. All sit in Castle Rock School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 186 Gassman Rd, Castle Rock, WA compare to other homes in Castle Rock 98611?

Among the 4,437 homes in Castle Rock 98611, it is worth more than 82% of them ($639,410 against a typical $467,213), its price per square foot is higher than 16% of them ($229 against a typical $293), it is bigger than 94% of them (2,796 ft² against a typical 1,572 ft²), its lot is bigger than 27% of them (1.3 ac against a typical 2.65 ac) and it is newer than 50% of them (1980 against a typical 1980). Measured against all of Cowlitz County, it is worth more than 87% 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 186 Gassman Rd, Castle Rock, WA?

The 2025 property tax bill for 186 Gassman Rd, Castle Rock, WA was $5,272. The county assessed it at $638,470.

More homes on Gassman Rd

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Assigned schools

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