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Single Family ResidenceResidential
$1,276,237$1,994 / 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 78How 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

421 RIVER RUN DR

KETCHUM, ID 83340
3
Beds
2
Baths
640 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.
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.3M
$996K low$1.6M 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.$1,276,237
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,020,990

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,513 (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.$1,609,511 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,268,936
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$340,575
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,473,702
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,609,511

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyBlaine
Lot (acres)The size of the land the home sits on, from county records.0.39

Transaction History(1)

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
Ernest Hemingway STEAM SchoolB+
Elementary · Grades PK–5 · 0.6 mi
M
Wood River Middle SchoolC-
Middle · Grades 6–8 · 11.5 mi
H
Wood River High SchoolC
High · Grades 9–12 · 12.6 mi

District: Blaine County School District 61

Neighborhood · ZIP 83340These 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.151
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.135

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.55%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.44%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.4,707
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$81,483
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$125,836
Average tempThe average temperature here across a full year.37°F
Annual precipHow much rain and melted snow falls here in a typical year.34 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

421 River Run Dr 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.

  • Costs more per square foot than 95% of homes in Blaine County
  • Smaller than 94% of homes in Blaine County
  • Older than 69% of homes in Blaine County

What homes are worth in Ketchum 83340

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

This home
$278K$7M

This home is worth more than 45% of homes in Ketchum 83340.

How it measures up in Ketchum 83340

The dot is this home. The mark in the middle is the typical home in Ketchum 83340.

Estimated value$1,276,237
CheaperTypical $1,430,191Pricier

Pricier than 45% of homes nearby

Price per ft²$1994
CheaperTypical $902Pricier

Pricier than 92% of homes nearby

Living area640 ft²
SmallerTypical 1,640 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.39 ac
SmallerTypical 0.25 acBigger

Bigger than 63% of homes nearby

Year built1977
OlderTypical 1982Newer

Newer than 36% of homes nearby

How 421 River Run Dr ranks against every home in each area.
MeasureThis homeKetchum 83340Blaine County
Estimated valuepricier than$1,276,23745% of homes58% of homes
Price per ft²pricier than$199492% of homes95% of homes
Living areabigger than640 ft²8% of homes6% of homes
Lot sizebigger than0.39 ac63% of homes56% of homes
Year builtnewer than197736% of homes31% of homes

About 421 River Run Dr

How much is 421 River Run Dr, Ketchum, ID worth?

The TopHap Estimate for 421 River Run Dr, Ketchum, ID is $1,276,237 as of Jul 14, 2026. The likely range is $995,811 to $1,556,663. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 River Run Dr, Ketchum, ID last sell?

421 River Run Dr, Ketchum, ID last sold on Apr 30, 2019, according to the county's recorded deed.

How big is 421 River Run Dr, Ketchum, ID?

421 River Run Dr, Ketchum, ID has 3 bedrooms, 2 bathrooms, 640 square feet of living space and a 0.39-acre lot.

When was 421 River Run Dr, Ketchum, ID built?

421 River Run Dr, Ketchum, ID was built in 1977, making it 49 years old.

What schools serve 421 River Run Dr, Ketchum, ID?

421 River Run Dr, Ketchum, ID is assigned to Ernest Hemingway STEAM School (elementary), rated B+; Wood River Middle School (middle), rated C-; Wood River High School (high), rated C. All sit in Blaine County School District 61. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 River Run Dr, Ketchum, ID compare to other homes in Ketchum 83340?

Among the 4,176 homes in Ketchum 83340, it is worth more than 45% of them ($1,276,237 against a typical $1,430,191), its price per square foot is higher than 92% of them ($1994 against a typical $902), it is bigger than 8% of them (640 ft² against a typical 1,640 ft²), its lot is bigger than 63% of them (0.39 ac against a typical 0.25 ac) and it is newer than 36% of them (1977 against a typical 1982). Measured against all of Blaine County, it is worth more than 58% 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 421 River Run Dr, Ketchum, ID?

The 2025 property tax bill for 421 River Run Dr, Ketchum, ID was $5,513. The county assessed it at $1,609,511.

More homes on River Run Dr

Closest homes

More homes in Ketchum 83340

Assigned schools

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