Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$272,615$357 / 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 68How 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

5257 E 21ST S

AMMON, ID 83401
1
Beds
1
Baths
764 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1945
Year BuiltThe year the home was originally built, according to county records.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$273K
$184K low$361K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$921 (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.$197,694 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$96,097
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$101,597
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$197,694

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.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
40
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
58
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
19
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
98
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
CountyBONNEVILLE
Lot (acres)The size of the land the home sits on, from county records.0.46
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.None
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
Rimrock Elementary SchoolA
Elementary · Grades KG–6 · 0.3 mi
M
Black Canyon Middle SchoolD+
Middle · Grades 7–8 · 1.4 mi
H
Thunder Ridge High SchoolA
High · Grades 9–12 · 1.4 mi

District: Bonneville Joint School District 93

Neighborhood · ZIP 83401These 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.81
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 100.129

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.54,367
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.273 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$73,220
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$93,243
Average tempThe average temperature here across a full year.42°F
Annual precipHow much rain and melted snow falls here in a typical year.17 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.64%

Owner Tools

Do you own this home?
Claim this home

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

5257 E 21st S 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 less than 67% of homes in Bonneville County
  • Among the highest price per square foot in Idaho Falls 83401
  • Smaller than 98% of homes in Idaho Falls 83401
  • Has a bigger lot than 76% of homes in Bonneville County
  • Older than 92% of homes in Idaho Falls 83401

What homes are worth in Idaho Falls 83401

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

This home
$138K$739K

This home is worth more than 43% of homes in Idaho Falls 83401.

How it measures up in Idaho Falls 83401

The dot is this home. The mark in the middle is the typical home in Idaho Falls 83401.

Estimated value$272,615
CheaperTypical $291,021Pricier

Pricier than 43% of homes nearby

Price per ft²$357
CheaperTypical $148Pricier

Pricier than almost all homes nearby

Living area764 ft²
SmallerTypical 1,977 ft²Bigger

Bigger than 2% of homes nearby

Lot size0.46 ac
SmallerTypical 0.28 acBigger

Bigger than 74% of homes nearby

Year built1945
OlderTypical 1993Newer

Newer than 8% of homes nearby

How 5257 E 21st S ranks against every home in each area.
MeasureThis homeIdaho Falls 83401Bonneville County
Estimated valuepricier than$272,61543% of homes33% of homes
Price per ft²pricier than$357almost all homes98% of homes
Living areabigger than764 ft²2% of homes3% of homes
Lot sizebigger than0.46 ac74% of homes76% of homes
Year builtnewer than19458% of homes9% of homes

About 5257 E 21st S

How much is 5257 E 21st S, Ammon, ID worth?

The TopHap Estimate for 5257 E 21st S, Ammon, ID is $272,615 as of Jul 14, 2026. The likely range is $184,262 to $360,968. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 5257 E 21st S, Ammon, ID last sell?

5257 E 21st S, Ammon, ID last sold on Jan 24, 2011, according to the county's recorded deed.

How big is 5257 E 21st S, Ammon, ID?

5257 E 21st S, Ammon, ID has 1 bedrooms, 1 bathrooms, 764 square feet of living space and a 0.46-acre lot.

When was 5257 E 21st S, Ammon, ID built?

5257 E 21st S, Ammon, ID was built in 1945, making it 81 years old.

What schools serve 5257 E 21st S, Ammon, ID?

5257 E 21st S, Ammon, ID is assigned to Rimrock Elementary School (elementary), rated A; Black Canyon Middle School (middle), rated D+; Thunder Ridge High School (high), rated A. All sit in Bonneville Joint School District 93. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 5257 E 21st S, Ammon, ID compare to other homes in Idaho Falls 83401?

Among the 15,390 homes in Idaho Falls 83401, it is worth more than 43% of them ($272,615 against a typical $291,021), its price per square foot is higher than almost all of them ($357 against a typical $148), it is bigger than 2% of them (764 ft² against a typical 1,977 ft²), its lot is bigger than 74% of them (0.46 ac against a typical 0.28 ac) and it is newer than 8% of them (1945 against a typical 1993). Measured against all of Bonneville County, it is worth more than 33% 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 5257 E 21st S, Ammon, ID?

The 2025 property tax bill for 5257 E 21st S, Ammon, ID was $921. The county assessed it at $197,694.

More homes on E 21st S

Closest homes

More homes in Ammon 83401

Assigned schools

Explore the area

See this home in context

Open 5257 E 21st S 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