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Residential - Vacant LandResidential
$105,074$105 / 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 97How 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 $175,000 on Jan 30, 2003

231 BLACK DIAMOND RD

STONYFORD, CA 95979
0
Baths
1,000 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.
0.35 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$105K
$102K low$108K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$175,000 · Jan 30, 2003

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$352 (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.$33,208 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,371
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$25,837
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$32,558

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.52
18
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
92
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
47
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
47
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
57
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.14 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.Residential - Vacant Land
CountyCOLUSA
Lot (acres)The size of the land the home sits on, from county records.0.35
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.

Foreclosure Filings(1)

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

H
Maxwell Sr High SchoolC+
High · Grades 9–12 · 16.7 mi
M
Maxwell Middle SchoolC-
Middle · Grades 6–8 · 17.0 mi
E
Maxwell Elementary SchoolC+
Elementary · Grades KG–5 · 17.0 mi

District: Maxwell Unified School District

Neighborhood · ZIP 95979These 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.144
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.218

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.70%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.10%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.2.4%
PopulationHow many people live in this area.1,340
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$50,844
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$63,577
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

231 Black Diamond 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.

  • Among the least valuable homes in Colusa County
  • Among the lowest price per square foot in Colusa County
  • Smaller than 85% of homes in Colusa County
  • Has a smaller lot than 75% of homes in Stonyford 95979

What homes are worth in Stonyford 95979

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

This home
$88K$400K

This home is worth more than 7% of homes in Stonyford 95979.

How it measures up in Stonyford 95979

The dot is this home. The mark in the middle is the typical home in Stonyford 95979.

Estimated value$105,074
CheaperTypical $181,016Pricier

Pricier than 7% of homes nearby

Price per ft²$105
CheaperTypical $150Pricier

Pricier than 6% of homes nearby

Living area1,000 ft²
SmallerTypical 1,248 ft²Bigger

Bigger than 29% of homes nearby

Lot size0.35 ac
SmallerTypical 1 acBigger

Bigger than 25% of homes nearby

How 231 Black Diamond Rd ranks against every home in each area.
MeasureThis homeStonyford 95979Colusa County
Estimated valuepricier than$105,0747% of homesalmost no homes
Price per ft²pricier than$1056% of homesalmost no homes
Living areabigger than1,000 ft²29% of homes15% of homes
Lot sizebigger than0.35 ac25% of homes75% of homes

About 231 Black Diamond Rd

How much is 231 Black Diamond Rd, Stonyford, CA worth?

The TopHap Estimate for 231 Black Diamond Rd, Stonyford, CA is $105,074 as of Sep 24, 2026. The likely range is $102,406 to $107,742. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 231 Black Diamond Rd, Stonyford, CA last sell?

231 Black Diamond Rd, Stonyford, CA last sold on Jan 30, 2003 for $175,000, according to the county's recorded deed.

How big is 231 Black Diamond Rd, Stonyford, CA?

231 Black Diamond Rd, Stonyford, CA has 1,000 square feet of living space and a 0.35-acre lot.

What schools serve 231 Black Diamond Rd, Stonyford, CA?

231 Black Diamond Rd, Stonyford, CA is assigned to Maxwell Sr High School (high), rated C+; Maxwell Middle School (middle), rated C-; Maxwell Elementary School (elementary), rated C+. All sit in Maxwell Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 231 Black Diamond Rd, Stonyford, CA compare to other homes in Stonyford 95979?

Among the 297 homes in Stonyford 95979, it is worth more than 7% of them ($105,074 against a typical $181,016), its price per square foot is higher than 6% of them ($105 against a typical $150), it is bigger than 29% of them (1,000 ft² against a typical 1,248 ft²) and its lot is bigger than 25% of them (0.35 ac against a typical 1 ac). Measured against all of Colusa County, it is worth more than almost no 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 231 Black Diamond Rd, Stonyford, CA?

The 2025 property tax bill for 231 Black Diamond Rd, Stonyford, CA was $352. The county assessed it at $33,208.

More homes on Black Diamond Rd

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Assigned schools

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