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Single Family ResidenceResidential
$539,435$243 / 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 Jul 14, 2026

340 HEADQUARTERS RD

CASTLE ROCK, WA 98611
3
Beds
2
Baths
2,220 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.
7.98 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
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

$539K
$509K low$570K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,846 (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.$479,620 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$61,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$418,520
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$458,150
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$479,620

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.40 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.7.98
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.Mixed
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 780 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.

E
Castle Rock Elementary SchoolD+
Elementary · Grades PK–5 · 2.9 mi
M
Castle Rock Middle SchoolC-
Middle · Grades 6–8 · 3.0 mi
H
Castle Rock High SchoolD+
High · Grades 9–12 · 3.8 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

340 Headquarters 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 81% of homes in Cowlitz County
  • Costs less per square foot than 65% of homes in Castle Rock 98611
  • Bigger than 85% of homes in Cowlitz County
  • Has a bigger lot than 93% 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
$195K$827K

This home is worth more than 74% 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$539,435
CheaperTypical $426,597Pricier

Pricier than 74% of homes nearby

Price per ft²$243
CheaperTypical $265Pricier

Pricier than 35% of homes nearby

Living area2,220 ft²
SmallerTypical 1,562 ft²Bigger

Bigger than 83% of homes nearby

Lot size7.98 ac
SmallerTypical 2.78 acBigger

Bigger than 86% of homes nearby

Year built1979
OlderTypical 1981Newer

Newer than 49% of homes nearby

How 340 Headquarters Rd ranks against every home in each area.
MeasureThis homeCastle Rock 98611Cowlitz County
Estimated valuepricier than$539,43574% of homes81% of homes
Price per ft²pricier than$24335% of homes43% of homes
Living areabigger than2,220 ft²83% of homes85% of homes
Lot sizebigger than7.98 ac86% of homes93% of homes
Year builtnewer than197949% of homes57% of homes

About 340 Headquarters Rd

How much is 340 Headquarters Rd, Castle Rock, WA worth?

The TopHap Estimate for 340 Headquarters Rd, Castle Rock, WA is $539,435 as of Jul 14, 2026. The likely range is $509,178 to $569,692. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 340 Headquarters Rd, Castle Rock, WA?

340 Headquarters Rd, Castle Rock, WA has 3 bedrooms, 2 bathrooms, 2,220 square feet of living space and a 7.98-acre lot.

When was 340 Headquarters Rd, Castle Rock, WA built?

340 Headquarters Rd, Castle Rock, WA was built in 1979, making it 47 years old. The building has 1 story.

What schools serve 340 Headquarters Rd, Castle Rock, WA?

340 Headquarters Rd, 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 340 Headquarters Rd, 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 74% of them ($539,435 against a typical $426,597), its price per square foot is higher than 35% of them ($243 against a typical $265), it is bigger than 83% of them (2,220 ft² against a typical 1,562 ft²), its lot is bigger than 86% of them (7.98 ac against a typical 2.78 ac) and it is newer than 49% of them (1979 against a typical 1981). Measured against all of Cowlitz County, it is worth more than 81% 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 340 Headquarters Rd, Castle Rock, WA?

The 2025 property tax bill for 340 Headquarters Rd, Castle Rock, WA was $3,846. The county assessed it at $479,620.

More homes on Headquarters Rd

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More homes in Castle Rock 98611

Assigned schools

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