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Single Family ResidenceResidential
$599,174$293 / 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 83How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

18042 IRWIN ST SW

ROCHESTER, WA 98579
3
Beds
3 / 2
Baths
2,046 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.
5.42 ac
Lot SizeThe size of the land the home sits on, from county records.
1992
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$599K
$497K low$701K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$98 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$651,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$225,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$426,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$627,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$651,600

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.19
60
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
25
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
11
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.24 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.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
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyThurston
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1994
Lot (acres)The size of the land the home sits on, from county records.5.42
ConstructionThe main material the home's frame and walls are built from.Wood Frame
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 240 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Rochester Middle SchoolB
Middle · Grades 6–8 · 1.8 mi
H
Rochester High SchoolC
High · Grades 9–12 · 1.9 mi
E
Rochester Primary School
Elementary · Grades PK–2 · 2.1 mi

District: Rochester School District

Neighborhood · ZIP 98579These 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.81
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.201

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.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.3%
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.12,480
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.138 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,547
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$104,823
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.56 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

18042 Irwin St Sw 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 78% of homes in Rochester 98579
  • Bigger than 81% of homes in Rochester 98579
  • Has a bigger lot than 95% of homes in Thurston County

What homes are worth in Rochester 98579

Each bar is how many homes fall in that price range. The marker is this home.

This home
$200K$919K

This home is worth more than 78% of homes in Rochester 98579.

How it measures up in Rochester 98579

The dot is this home. The mark in the middle is the typical home in Rochester 98579.

Estimated value$599,174
CheaperTypical $487,482Pricier

Pricier than 78% of homes nearby

Price per ft²$293
CheaperTypical $299Pricier

Pricier than 45% of homes nearby

Living area2,046 ft²
SmallerTypical 1,544 ft²Bigger

Bigger than 81% of homes nearby

Lot size5.42 ac
SmallerTypical 1.21 acBigger

Bigger than 86% of homes nearby

Year built1992
OlderTypical 1995Newer

Newer than 45% of homes nearby

How 18042 Irwin St Sw ranks against every home in each area.
MeasureThis homeRochester 98579Thurston County
Estimated valuepricier than$599,17478% of homes78% of homes
Price per ft²pricier than$29345% of homes63% of homes
Living areabigger than2,046 ft²81% of homes66% of homes
Lot sizebigger than5.42 ac86% of homes95% of homes
Year builtnewer than199245% of homes53% of homes

About 18042 Irwin St Sw

How much is 18042 Irwin St Sw, Rochester, WA worth?

The TopHap Estimate for 18042 Irwin St Sw, Rochester, WA is $599,174 as of Aug 30, 2026. The likely range is $496,920 to $701,428. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 18042 Irwin St Sw, Rochester, WA?

18042 Irwin St Sw, Rochester, WA has 3 bedrooms, 3 bathrooms, 2,046 square feet of living space and a 5.42-acre lot.

When was 18042 Irwin St Sw, Rochester, WA built?

18042 Irwin St Sw, Rochester, WA was built in 1992, making it 34 years old. It is a ranch home. The building has 1 story.

What schools serve 18042 Irwin St Sw, Rochester, WA?

18042 Irwin St Sw, Rochester, WA is assigned to Rochester Middle School (middle), rated B; Rochester High School (high), rated C; Rochester Primary School (elementary). All sit in Rochester School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18042 Irwin St Sw, Rochester, WA compare to other homes in Rochester 98579?

Among the 5,059 homes in Rochester 98579, it is worth more than 78% of them ($599,174 against a typical $487,482), its price per square foot is higher than 45% of them ($293 against a typical $299), it is bigger than 81% of them (2,046 ft² against a typical 1,544 ft²), its lot is bigger than 86% of them (5.42 ac against a typical 1.21 ac) and it is newer than 45% of them (1992 against a typical 1995). Measured against all of Thurston County, it is worth more than 78% 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 18042 Irwin St Sw, Rochester, WA?

The 2026 property tax bill for 18042 Irwin St Sw, Rochester, WA was $98. The county assessed it at $651,600.

More homes on Irwin St Sw

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Assigned schools

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