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Single Family ResidenceResidential
$494,305$210 / 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 84How 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

4005 WESTSIDE HWY

CASTLE ROCK, WA 98611
2
Beds
1.5
Baths
2,354 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.
6.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1963
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$494K
$417K low$572K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,286 (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.$517,230 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$92,730
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$424,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$511,220
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$517,230

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyCOWLITZ
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Heat Pump
CoolingThe type of cooling or air conditioning in the home.Yes
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.Porch · 300 ft²

Transaction History(3)

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
Castle Rock Elementary SchoolD+
Elementary · Grades PK–5 · 1.1 mi
M
Castle Rock Middle SchoolC-
Middle · Grades 6–8 · 1.2 mi
H
Castle Rock High SchoolD+
High · Grades 9–12 · 2.0 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%

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

4005 Westside Hwy 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 69% of homes in Cowlitz County
  • Costs less per square foot than 89% of homes in Castle Rock 98611
  • Bigger than 87% of homes in Cowlitz County
  • Has a bigger lot than 91% of homes in Cowlitz County
  • Older than 75% 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
$216K$890K

This home is worth more than 56% 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$494,305
CheaperTypical $468,430Pricier

Pricier than 56% of homes nearby

Price per ft²$210
CheaperTypical $290Pricier

Pricier than 11% of homes nearby

Living area2,354 ft²
SmallerTypical 1,589 ft²Bigger

Bigger than 86% of homes nearby

Lot size6.1 ac
SmallerTypical 2.59 acBigger

Bigger than 82% of homes nearby

Year built1963
OlderTypical 1980Newer

Newer than 25% of homes nearby

How 4005 Westside Hwy ranks against every home in each area.
MeasureThis homeCastle Rock 98611Cowlitz County
Estimated valuepricier than$494,30556% of homes69% of homes
Price per ft²pricier than$21011% of homes12% of homes
Living areabigger than2,354 ft²86% of homes87% of homes
Lot sizebigger than6.1 ac82% of homes91% of homes
Year builtnewer than196325% of homes36% of homes

About 4005 Westside Hwy

How much is 4005 Westside Hwy, Castle Rock, WA worth?

The TopHap Estimate for 4005 Westside Hwy, Castle Rock, WA is $494,305 as of Sep 24, 2026. The likely range is $416,648 to $571,962. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4005 Westside Hwy, Castle Rock, WA last sell?

4005 Westside Hwy, Castle Rock, WA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 4005 Westside Hwy, Castle Rock, WA?

4005 Westside Hwy, Castle Rock, WA has 2 bedrooms, 1.5 bathrooms and 2,354 square feet of living space.

When was 4005 Westside Hwy, Castle Rock, WA built?

4005 Westside Hwy, Castle Rock, WA was built in 1963, making it 63 years old. The building has 1 story.

What schools serve 4005 Westside Hwy, Castle Rock, WA?

4005 Westside Hwy, Castle Rock, WA is assigned to Castle Rock Elementary School (elementary), rated D+; Castle Rock Middle School (middle), rated C-; Castle Rock High School (high), rated D+. All sit in Castle Rock School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4005 Westside Hwy, Castle Rock, WA compare to other homes in Castle Rock 98611?

Among the 4,435 homes in Castle Rock 98611, it is worth more than 56% of them ($494,305 against a typical $468,430), its price per square foot is higher than 11% of them ($210 against a typical $290), it is bigger than 86% of them (2,354 ft² against a typical 1,589 ft²), its lot is bigger than 82% of them (6.1 ac against a typical 2.59 ac) and it is newer than 25% of them (1963 against a typical 1980). Measured against all of Cowlitz 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 4005 Westside Hwy, Castle Rock, WA?

The 2025 property tax bill for 4005 Westside Hwy, Castle Rock, WA was $4,286. The county assessed it at $517,230.

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