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Rural ResidenceResidential
$655,782$806 / 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 Sep 24, 2026
Last sold for $60,000 on May 17, 1993

40500 MATTOLE RD

PETROLIA, CA 95558
0
Baths
814 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.
19.86 ac
Lot SizeThe size of the land the home sits on, from county records.
2011
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$656K
$543K low$768K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$60,000 · May 17, 1993

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,494 (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.$420,033 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$224,198
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$195,835
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$420,033

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.47 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.Rural Residence
CountyHumboldt
Lot (acres)The size of the land the home sits on, from county records.19.86
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Honeydew Elementary School
Elementary · Grades KG–8 · 2.9 mi
H
Mattole Triple Junction High School
High · Grades 9–12 · 7.6 mi
M
Mattole Elementary SchoolA-
Middle · Grades KG–8 · 7.6 mi

District: Mattole Unified School District

Neighborhood · ZIP 95558These 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.139
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.375

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.81%
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.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.532
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$66,569
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$113,400
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.72 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

40500 Mattole 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 95% of homes in Petrolia 95558
  • Among the highest price per square foot in Petrolia 95558
  • Smaller than 94% of homes in Humboldt County
  • Has a bigger lot than 95% of homes in Humboldt County
  • Newer than 96% of homes in Humboldt County

What homes are worth in Petrolia 95558

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

This home
$114K$737K

This home is worth more than 95% of homes in Petrolia 95558.

How it measures up in Petrolia 95558

The dot is this home. The mark in the middle is the typical home in Petrolia 95558.

Estimated value$655,782
CheaperTypical $333,990Pricier

Pricier than 95% of homes nearby

Price per ft²$806
CheaperTypical $273Pricier

Pricier than almost all homes nearby

Living area814 ft²
SmallerTypical 1,224 ft²Bigger

Bigger than 18% of homes nearby

Lot size19.86 ac
SmallerTypical 9.2 acBigger

Bigger than 60% of homes nearby

Year built2011
OlderTypical 1970Newer

Newer than 94% of homes nearby

How 40500 Mattole Rd ranks against every home in each area.
MeasureThis homePetrolia 95558Humboldt County
Estimated valuepricier than$655,78295% of homes89% of homes
Price per ft²pricier than$806almost all homesalmost all homes
Living areabigger than814 ft²18% of homes6% of homes
Lot sizebigger than19.86 ac60% of homes95% of homes
Year builtnewer than201194% of homes96% of homes

About 40500 Mattole Rd

How much is 40500 Mattole Rd, Petrolia, CA worth?

The TopHap Estimate for 40500 Mattole Rd, Petrolia, CA is $655,782 as of Sep 24, 2026. The likely range is $543,192 to $768,372. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 40500 Mattole Rd, Petrolia, CA last sell?

40500 Mattole Rd, Petrolia, CA last sold on May 17, 1993 for $60,000, according to the county's recorded deed.

How big is 40500 Mattole Rd, Petrolia, CA?

40500 Mattole Rd, Petrolia, CA has 814 square feet of living space and a 19.86-acre lot.

When was 40500 Mattole Rd, Petrolia, CA built?

40500 Mattole Rd, Petrolia, CA was built in 2011, making it 15 years old. The building has 2 stories.

What schools serve 40500 Mattole Rd, Petrolia, CA?

40500 Mattole Rd, Petrolia, CA is assigned to Honeydew Elementary School (elementary); Mattole Triple Junction High School (high); Mattole Elementary School (middle), rated A-. All sit in Mattole Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 40500 Mattole Rd, Petrolia, CA compare to other homes in Petrolia 95558?

Among the 195 homes in Petrolia 95558, it is worth more than 95% of them ($655,782 against a typical $333,990), its price per square foot is higher than almost all of them ($806 against a typical $273), it is bigger than 18% of them (814 ft² against a typical 1,224 ft²), its lot is bigger than 60% of them (19.86 ac against a typical 9.2 ac) and it is newer than 94% of them (2011 against a typical 1970). Measured against all of Humboldt County, it is worth more than 89% 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 40500 Mattole Rd, Petrolia, CA?

The 2025 property tax bill for 40500 Mattole Rd, Petrolia, CA was $4,494. The county assessed it at $420,033.

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