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Single Family ResidenceResidential
$440,183$230 / 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 85How 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

3421 WESTSIDE HWY

CASTLE ROCK, WA 98611
2
Beds
2 / 1
Baths
1,917 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.
12.97 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
8
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$440K
$375K low$506K 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.$440,183
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$352,146

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,287 (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.$444,770 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$65,110
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$379,660
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$466,280
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$444,770

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

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
Lot (acres)The size of the land the home sits on, from county records.12.97
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Electric
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, Detached

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 · 2.1 mi
M
Castle Rock Middle SchoolC-
Middle · Grades 6–8 · 2.1 mi
H
Castle Rock High SchoolD+
High · Grades 9–12 · 2.9 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%

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

3421 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 65% of homes in Cowlitz County
  • Costs less per square foot than 73% of homes in Castle Rock 98611
  • Bigger than 74% of homes in Cowlitz County
  • Has a bigger lot than 97% of homes in Cowlitz County
  • Older than 86% 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
$195K$866K

This home is worth more than 52% 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$440,183
CheaperTypical $429,997Pricier

Pricier than 52% of homes nearby

Price per ft²$230
CheaperTypical $268Pricier

Pricier than 27% of homes nearby

Living area1,917 ft²
SmallerTypical 1,566 ft²Bigger

Bigger than 71% of homes nearby

Lot size12.97 ac
SmallerTypical 2.8 acBigger

Bigger than 94% of homes nearby

Year built1940
OlderTypical 1980Newer

Newer than 14% of homes nearby

How 3421 Westside Hwy ranks against every home in each area.
MeasureThis homeCastle Rock 98611Cowlitz County
Estimated valuepricier than$440,18352% of homes65% of homes
Price per ft²pricier than$23027% of homes33% of homes
Living areabigger than1,917 ft²71% of homes74% of homes
Lot sizebigger than12.97 ac94% of homes97% of homes
Year builtnewer than194014% of homes17% of homes

About 3421 Westside Hwy

How much is 3421 Westside Hwy, Castle Rock, WA worth?

The TopHap Estimate for 3421 Westside Hwy, Castle Rock, WA is $440,183 as of Jul 14, 2026. The likely range is $374,726 to $505,640. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 3421 Westside Hwy, Castle Rock, WA?

3421 Westside Hwy, Castle Rock, WA has 2 bedrooms, 2 bathrooms, 1,917 square feet of living space and a 12.97-acre lot.

When was 3421 Westside Hwy, Castle Rock, WA built?

3421 Westside Hwy, Castle Rock, WA was built in 1940, making it 86 years old. The building has 1 story.

What schools serve 3421 Westside Hwy, Castle Rock, WA?

3421 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 3421 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 52% of them ($440,183 against a typical $429,997), its price per square foot is higher than 27% of them ($230 against a typical $268), it is bigger than 71% of them (1,917 ft² against a typical 1,566 ft²), its lot is bigger than 94% of them (12.97 ac against a typical 2.8 ac) and it is newer than 14% of them (1940 against a typical 1980). Measured against all of Cowlitz County, it is worth more than 65% 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 3421 Westside Hwy, Castle Rock, WA?

The 2025 property tax bill for 3421 Westside Hwy, Castle Rock, WA was $3,287. The county assessed it at $444,770.

Closest homes

More homes in Castle Rock 98611

Assigned schools

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