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Single Family ResidenceResidential
$567,578$273 / 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 74How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

3900 WESTSIDE HWY

CASTLE ROCK, WA 98611
3
Beds
3
Baths
2,080 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.
10.75 ac
Lot SizeThe size of the land the home sits on, from county records.
2007
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$568K
$420K low$715K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$132,578
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$106,062
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.73%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$435,000
MANN MORTGAGE LLC · recorded Nov 13, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,047 (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.$871,680 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$106,560
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$765,120
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$723,580
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$871,680

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.197 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

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
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Mixed

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 · 1.3 mi
M
Castle Rock Middle SchoolC-
Middle · Grades 6–8 · 1.4 mi
H
Castle Rock High SchoolD+
High · Grades 9–12 · 2.2 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

3900 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 83% of homes in Cowlitz County
  • Bigger than 81% of homes in Cowlitz County
  • Has a bigger lot than 96% of homes in Cowlitz County
  • Newer than 88% of homes in Cowlitz County

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
$198K$878K

This home is worth more than 77% 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$567,578
CheaperTypical $432,590Pricier

Pricier than 77% of homes nearby

Price per ft²$273
CheaperTypical $268Pricier

Pricier than 53% of homes nearby

Living area2,080 ft²
SmallerTypical 1,566 ft²Bigger

Bigger than 78% of homes nearby

Lot size10.75 ac
SmallerTypical 2.8 acBigger

Bigger than 92% of homes nearby

Year built2007
OlderTypical 1980Newer

Newer than 82% of homes nearby

How 3900 Westside Hwy ranks against every home in each area.
MeasureThis homeCastle Rock 98611Cowlitz County
Estimated valuepricier than$567,57877% of homes83% of homes
Price per ft²pricier than$27353% of homes60% of homes
Living areabigger than2,080 ft²78% of homes81% of homes
Lot sizebigger than10.75 ac92% of homes96% of homes
Year builtnewer than200782% of homes88% of homes

About 3900 Westside Hwy

How much is 3900 Westside Hwy, Castle Rock, WA worth?

The TopHap Estimate for 3900 Westside Hwy, Castle Rock, WA is $567,578 as of Jul 14, 2026. The likely range is $420,160 to $714,996. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 3900 Westside Hwy, Castle Rock, WA?

3900 Westside Hwy, Castle Rock, WA has 3 bedrooms, 3 bathrooms and 2,080 square feet of living space.

When was 3900 Westside Hwy, Castle Rock, WA built?

3900 Westside Hwy, Castle Rock, WA was built in 2007, making it 19 years old. The building has 2 stories.

What schools serve 3900 Westside Hwy, Castle Rock, WA?

3900 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 3900 Westside Hwy, Castle Rock, WA compare to other homes in Castle Rock 98611?

Among the 4,447 homes in Castle Rock 98611, it is worth more than 77% of them ($567,578 against a typical $432,590), its price per square foot is higher than 53% of them ($273 against a typical $268), it is bigger than 78% of them (2,080 ft² against a typical 1,566 ft²), its lot is bigger than 92% of them (10.75 ac against a typical 2.8 ac) and it is newer than 82% of them (2007 against a typical 1980). Measured against all of Cowlitz County, it is worth more than 83% 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 3900 Westside Hwy, Castle Rock, WA?

The 2025 property tax bill for 3900 Westside Hwy, Castle Rock, WA was $6,047. The county assessed it at $871,680.

Closest homes

More homes in Castle Rock 98611

Assigned schools

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