Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$626,505$427 / 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 50How 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

21 RIVER AVE

CLAYTON, ID 83227
3
Beds
2
Baths
1,468 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$627K
$312K low$941K high
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.$626,505
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$501,204

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$482 (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.$229,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$22,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$207,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$224,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$229,400

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.60
99
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
58
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
49
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
44
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
50
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.197 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
CountyCUSTER
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.1965
Lot (acres)The size of the land the home sits on, from county records.0.29
RoofThe main material covering the roof, such as asphalt shingle or tile.Galvanized
HeatingThe type of heating system in the home.Floor/Wall Furnace
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Challis Elementary School
Elementary · Grades PK–6 · 19.1 mi
M
Challis Jr/Sr High SchoolF
Middle · Grades 7–12 · 19.3 mi

District: Challis Joint School District 181

Neighborhood · ZIP 83227These 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.138
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.112
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.222

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.40%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.69%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.9%
PopulationHow many people live in this area.130
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.0 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,611
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,385
Average tempThe average temperature here across a full year.36°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.64%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

21 River Ave 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 72% of homes in Custer County
  • Costs more per square foot than 72% of homes in Custer County
  • Has a smaller lot than 98% of homes in Clayton 83227
  • Older than 91% of homes in Clayton 83227

What homes are worth in Clayton 83227

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

This home
$141K$1.8M

This home is worth more than 57% of homes in Clayton 83227.

How it measures up in Clayton 83227

The dot is this home. The mark in the middle is the typical home in Clayton 83227.

Estimated value$626,505
CheaperTypical $562,312Pricier

Pricier than 57% of homes nearby

Price per ft²$427
CheaperTypical $422Pricier

Pricier than 55% of homes nearby

Living area1,468 ft²
SmallerTypical 1,248 ft²Bigger

Bigger than 64% of homes nearby

Lot size0.29 ac
SmallerTypical 4.04 acBigger

Bigger than 2% of homes nearby

Year built1940
OlderTypical 1985Newer

Newer than 9% of homes nearby

How 21 River Ave ranks against every home in each area.
MeasureThis homeClayton 83227Custer County
Estimated valuepricier than$626,50557% of homes72% of homes
Price per ft²pricier than$42755% of homes72% of homes
Living areabigger than1,468 ft²64% of homes53% of homes
Lot sizebigger than0.29 ac2% of homes11% of homes
Year builtnewer than19409% of homes10% of homes

About 21 River Ave

How much is 21 River Ave, Clayton, ID worth?

The TopHap Estimate for 21 River Ave, Clayton, ID is $626,505 as of Jul 14, 2026. The likely range is $311,855 to $941,155. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 River Ave, Clayton, ID last sell?

21 River Ave, Clayton, ID last sold on Jul 31, 2014, according to the county's recorded deed.

How big is 21 River Ave, Clayton, ID?

21 River Ave, Clayton, ID has 3 bedrooms, 2 bathrooms, 1,468 square feet of living space and a 0.29-acre lot.

When was 21 River Ave, Clayton, ID built?

21 River Ave, Clayton, ID was built in 1940, making it 86 years old. The building has 2 stories.

What schools serve 21 River Ave, Clayton, ID?

21 River Ave, Clayton, ID is assigned to Challis Elementary School (elementary); Challis Jr/Sr High School (middle), rated F. All sit in Challis Joint School District 181. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 River Ave, Clayton, ID compare to other homes in Clayton 83227?

Among the 200 homes in Clayton 83227, it is worth more than 57% of them ($626,505 against a typical $562,312), its price per square foot is higher than 55% of them ($427 against a typical $422), it is bigger than 64% of them (1,468 ft² against a typical 1,248 ft²), its lot is bigger than 2% of them (0.29 ac against a typical 4.04 ac) and it is newer than 9% of them (1940 against a typical 1985). Measured against all of Custer County, it is worth more than 72% 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 21 River Ave, Clayton, ID?

The 2025 property tax bill for 21 River Ave, Clayton, ID was $482. The county assessed it at $229,400.

Closest homes

More homes in Clayton 83227

Assigned schools

Explore the area

See this home in context

Open 21 River Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map