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Single Family ResidenceResidential
$614,852$364 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $87,000 on Mar 22, 2017

401 MONAHAN RD

CASTLE ROCK, WA 98611
3
Beds
2
Baths
1,687 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.
10.02 ac
Lot SizeThe size of the land the home sits on, from county records.
2019
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$615K
$573K low$657K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$87,000 · Mar 22, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,969 (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.$484,230 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$46,220
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$438,010
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$473,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$549,190

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
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

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.

H
Castle Rock High SchoolC-
High · Grades 9–12 · 3.5 mi
M
Castle Rock Middle SchoolD-
Middle · Grades 6–8 · 3.9 mi
E
Castle Rock Elementary SchoolD+
Elementary · Grades PK–5 · 4.0 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%

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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

401 Monahan 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 85% of homes in Cowlitz County
  • Costs more per square foot than 89% of homes in Cowlitz County
  • Has a bigger lot than 97% of homes in Cowlitz County
  • Newer than 95% 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
$236K$936K

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$614,852
CheaperTypical $470,740Pricier

Pricier than 77% of homes nearby

Price per ft²$364
CheaperTypical $291Pricier

Pricier than 85% of homes nearby

Living area1,687 ft²
SmallerTypical 1,593 ft²Bigger

Bigger than 55% of homes nearby

Lot size10.02 ac
SmallerTypical 2.44 acBigger

Bigger than 93% of homes nearby

Year built2019
OlderTypical 1980Newer

Newer than 93% of homes nearby

How 401 Monahan Rd ranks against every home in each area.
MeasureThis homeCastle Rock 98611Cowlitz County
Estimated valuepricier than$614,85277% of homes85% of homes
Price per ft²pricier than$36485% of homes89% of homes
Living areabigger than1,687 ft²55% of homes60% of homes
Lot sizebigger than10.02 ac93% of homes97% of homes
Year builtnewer than201993% of homes95% of homes

About 401 Monahan Rd

How much is 401 Monahan Rd, Castle Rock, WA worth?

The TopHap Estimate for 401 Monahan Rd, Castle Rock, WA is $614,852 as of Oct 21, 2026. The likely range is $572,982 to $656,722. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 401 Monahan Rd, Castle Rock, WA last sell?

401 Monahan Rd, Castle Rock, WA last sold on Mar 22, 2017 for $87,000, according to the county's recorded deed.

How big is 401 Monahan Rd, Castle Rock, WA?

401 Monahan Rd, Castle Rock, WA has 3 bedrooms, 2 bathrooms and 1,687 square feet of living space.

When was 401 Monahan Rd, Castle Rock, WA built?

401 Monahan Rd, Castle Rock, WA was built in 2019, making it 7 years old. The building has 1 story.

What schools serve 401 Monahan Rd, Castle Rock, WA?

401 Monahan Rd, Castle Rock, WA is assigned to Castle Rock High School (high), rated C-; Castle Rock Middle School (middle), rated D-; 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 401 Monahan Rd, Castle Rock, WA compare to other homes in Castle Rock 98611?

Among the 4,409 homes in Castle Rock 98611, it is worth more than 77% of them ($614,852 against a typical $470,740), its price per square foot is higher than 85% of them ($364 against a typical $291), it is bigger than 55% of them (1,687 ft² against a typical 1,593 ft²), its lot is bigger than 93% of them (10.02 ac against a typical 2.44 ac) and it is newer than 93% of them (2019 against a typical 1980). Measured against all of Cowlitz County, it is worth more than 85% 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 401 Monahan Rd, Castle Rock, WA?

The 2025 property tax bill for 401 Monahan Rd, Castle Rock, WA was $3,969. The county assessed it at $484,230.

More homes on Monahan Rd

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More homes in Castle Rock 98611

Assigned schools

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