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Single Family ResidenceResidential
$512,181$458 / 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 95How 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

1139 I ST

ARCATA, CA 95521
3
Beds
1
Baths
1,118 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1906
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$512K
$487K low$537K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,443 (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.$110,986 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$33,724
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$77,262
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$110,986

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyHumboldt
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.1952
Lot (acres)The size of the land the home sits on, from county records.0.12
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Floor/Wall Furnace
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(12)

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
Arcata High SchoolA+
High · Grades 9–12 · 0.4 mi
E
Arcata Elementary SchoolC
Elementary · Grades KG–5 · 0.8 mi
M
Sunny Brae Middle SchoolB
Middle · Grades 6–8 · 1.4 mi

District: Northern Humboldt Union High School District

Neighborhood · ZIP 95521These 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.113
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.641

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.26%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.20,920
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.271 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$48,337
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$66,702
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.76 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.51%

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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

1139 I St 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 75% of homes in Humboldt County
  • Costs more per square foot than 95% of homes in Humboldt County
  • Smaller than 79% of homes in Arcata Heights / Northtown
  • Has a smaller lot than 93% of homes in Humboldt County
  • Older than 96% of homes in Arcata 95521

What homes are worth in Arcata 95521

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

This home
$229K$933K

This home is worth more than 62% of homes in Arcata 95521.

How it measures up in Arcata 95521

The dot is this home. The mark in the middle is the typical home in Arcata 95521.

Estimated value$512,181
CheaperTypical $466,779Pricier

Pricier than 62% of homes nearby

Price per ft²$458
CheaperTypical $352Pricier

Pricier than 90% of homes nearby

Living area1,118 ft²
SmallerTypical 1,404 ft²Bigger

Bigger than 27% of homes nearby

Lot size0.11 ac
SmallerTypical 0.19 acBigger

Bigger than 8% of homes nearby

Year built1906
OlderTypical 1958Newer

Newer than 4% of homes nearby

How 1139 I St ranks against every home in each area.
MeasureThis homeArcata Heights / NorthtownArcata 95521Humboldt County
Estimated valuepricier than$512,18137% of homes62% of homes75% of homes
Price per ft²pricier than$45882% of homes90% of homes95% of homes
Living areabigger than1,118 ft²21% of homes27% of homes22% of homes
Lot sizebigger than0.11 ac21% of homes8% of homes7% of homes
Year builtnewer than190623% of homes4% of homes6% of homes

About 1139 I St

How much is 1139 I St, Arcata, CA worth?

The TopHap Estimate for 1139 I St, Arcata, CA is $512,181 as of Aug 30, 2026. The likely range is $486,962 to $537,400. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 1139 I St, Arcata, CA?

1139 I St, Arcata, CA has 3 bedrooms, 1 bathrooms, 1,118 square feet of living space and a 0.12-acre lot.

When was 1139 I St, Arcata, CA built?

1139 I St, Arcata, CA was built in 1906, making it 120 years old. The building has 1 story.

What schools serve 1139 I St, Arcata, CA?

1139 I St, Arcata, CA is assigned to Arcata High School (high), rated A+; Arcata Elementary School (elementary), rated C; Sunny Brae Middle School (middle), rated B. All sit in Northern Humboldt Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1139 I St, Arcata, CA compare to other homes in Arcata 95521?

Among the 5,321 homes in Arcata 95521, it is worth more than 62% of them ($512,181 against a typical $466,779), its price per square foot is higher than 90% of them ($458 against a typical $352), it is bigger than 27% of them (1,118 ft² against a typical 1,404 ft²), its lot is bigger than 8% of them (0.11 ac against a typical 0.19 ac) and it is newer than 4% of them (1906 against a typical 1958). Measured against all of Humboldt County, it is worth more than 75% 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 1139 I St, Arcata, CA?

The 2025 property tax bill for 1139 I St, Arcata, CA was $1,443. The county assessed it at $110,986.

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