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Single Family ResidenceResidential
$282,064$542 / 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 87How 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
Last sold for $365,000 on Apr 13, 2012

170 BIG ROCK RD

MAD RIVER, CA 95552
1
Baths
520 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.
40 ac
Lot SizeThe size of the land the home sits on, from county records.
2007
Year BuiltThe year the home was originally built, according to county records.

Valuation

$282K
$245K low$319K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$365,000 · Apr 13, 2012
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$282,064
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$225,651

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,277 (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.$499,791 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$370,533
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$129,258
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$493,483

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.84 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.possible but undetermined

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
CountyTRINITY
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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
Southern Trinity High School
High · Grades 9–12 · 1.5 mi
E
Van Duzen Elementary SchoolA
Elementary · Grades KG–8 · 1.5 mi

District: Southern Trinity Joint Unified School District

Neighborhood · ZIP 95552These 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.132
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 100.241

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.67%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.20%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.4%
PopulationHow many people live in this area.1,159
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$25,785
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$47,970
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.69 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.51%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

170 Big Rock 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 77% of homes in Mad River 95552
  • Costs more per square foot than 97% of homes in Mad River 95552
  • Smaller than 94% of homes in Trinity County
  • Has a bigger lot than 94% of homes in Trinity County
  • Newer than 89% of homes in Trinity County

What homes are worth in Mad River 95552

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

This home
$86K$549K

This home is worth more than 77% of homes in Mad River 95552.

How it measures up in Mad River 95552

The dot is this home. The mark in the middle is the typical home in Mad River 95552.

Estimated value$282,064
CheaperTypical $190,447Pricier

Pricier than 77% of homes nearby

Price per ft²$542
CheaperTypical $190Pricier

Pricier than 97% of homes nearby

Living area520 ft²
SmallerTypical 1,092 ft²Bigger

Bigger than 10% of homes nearby

Lot size40 ac
SmallerTypical 9.22 acBigger

Bigger than 88% of homes nearby

Year built2007
OlderTypical 1987Newer

Newer than 83% of homes nearby

How 170 Big Rock Rd ranks against every home in each area.
MeasureThis homeMad River 95552Trinity County
Estimated valuepricier than$282,06477% of homes63% of homes
Price per ft²pricier than$54297% of homes97% of homes
Living areabigger than520 ft²10% of homes6% of homes
Lot sizebigger than40 ac88% of homes94% of homes
Year builtnewer than200783% of homes89% of homes

About 170 Big Rock Rd

How much is 170 Big Rock Rd, Mad River, CA worth?

The TopHap Estimate for 170 Big Rock Rd, Mad River, CA is $282,064 as of Jul 14, 2026. The likely range is $244,969 to $319,159. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 170 Big Rock Rd, Mad River, CA last sell?

170 Big Rock Rd, Mad River, CA last sold on Apr 13, 2012 for $365,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 170 Big Rock Rd, Mad River, CA?

170 Big Rock Rd, Mad River, CA has 1 bathrooms and 520 square feet of living space.

When was 170 Big Rock Rd, Mad River, CA built?

170 Big Rock Rd, Mad River, CA was built in 2007, making it 19 years old.

What schools serve 170 Big Rock Rd, Mad River, CA?

170 Big Rock Rd, Mad River, CA is assigned to Southern Trinity High School (high); Van Duzen Elementary School (elementary), rated A. All sit in Southern Trinity Joint Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 170 Big Rock Rd, Mad River, CA compare to other homes in Mad River 95552?

Among the 479 homes in Mad River 95552, it is worth more than 77% of them ($282,064 against a typical $190,447), its price per square foot is higher than 97% of them ($542 against a typical $190), it is bigger than 10% of them (520 ft² against a typical 1,092 ft²), its lot is bigger than 88% of them (40 ac against a typical 9.22 ac) and it is newer than 83% of them (2007 against a typical 1987). Measured against all of Trinity County, it is worth more than 63% 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 170 Big Rock Rd, Mad River, CA?

The 2025 property tax bill for 170 Big Rock Rd, Mad River, CA was $5,277. The county assessed it at $499,791.

More homes on Big Rock Rd

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Assigned schools

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