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Single Family ResidenceResidential
$231,047$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 90How 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

12 21ST ST N

GREAT FALLS, MT 59401
4
Beds
2
Baths
648 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.
3,746 ft²
Lot SizeThe size of the land the home sits on, from county records.
1937
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$231K
$208K low$254K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,285 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$214,700 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$189,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$214,700

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Historical
CountyCASCADE
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.1995
Lot (acres)The size of the land the home sits on, from county records.0.09
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 18 ft²

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.

H
Great Falls High SchoolD-
High · Grades 9–12 · 0.3 mi
E
Giant Springs Elementary SchoolD-
Elementary · Grades KG–6 · 0.9 mi
M
East Middle SchoolC+
Middle · Grades 7–8 · 1.6 mi

District: Great Falls Elementary School District

Neighborhood · ZIP 59401These 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.122
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.46

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.23%
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.13,474
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,643 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$54,638
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$67,270
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.14 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.61%

Owner Tools

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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

12 21st St N 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 89% of homes in Cascade County
  • Costs more per square foot than 92% of homes in Great Falls 59401
  • Smaller than 97% of homes in Great Falls 59401
  • Has a smaller lot than 94% of homes in Cascade County
  • Older than 82% of homes in Cascade County

What homes are worth in Great Falls 59401

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

This home
$163K$513K

This home is worth more than 16% of homes in Great Falls 59401.

How it measures up in Great Falls 59401

The dot is this home. The mark in the middle is the typical home in Great Falls 59401.

Estimated value$231,047
CheaperTypical $298,394Pricier

Pricier than 16% of homes nearby

Price per ft²$357
CheaperTypical $257Pricier

Pricier than 92% of homes nearby

Living area648 ft²
SmallerTypical 1,138 ft²Bigger

Bigger than 3% of homes nearby

Lot size3,746 ft²
SmallerTypical 0.17 acBigger

Bigger than 10% of homes nearby

Year built1937
OlderTypical 1930Newer

Newer than 54% of homes nearby

How 12 21st St N ranks against every home in each area.
MeasureThis homeGreat Falls 59401Cascade County
Estimated valuepricier than$231,04716% of homes11% of homes
Price per ft²pricier than$35792% of homes81% of homes
Living areabigger than648 ft²3% of homes3% of homes
Lot sizebigger than3,746 ft²10% of homes6% of homes
Year builtnewer than193754% of homes18% of homes

About 12 21st St N

How much is 12 21st St N, Great Falls, MT worth?

The TopHap Estimate for 12 21st St N, Great Falls, MT is $231,047 as of Sep 24, 2026. The likely range is $208,438 to $253,656. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12 21st St N, Great Falls, MT last sell?

12 21st St N, Great Falls, MT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 12 21st St N, Great Falls, MT?

12 21st St N, Great Falls, MT has 4 bedrooms, 2 bathrooms, 648 square feet of living space and a 0.09-acre lot.

When was 12 21st St N, Great Falls, MT built?

12 21st St N, Great Falls, MT was built in 1937, making it 89 years old. It is a historical home. The building has 1 story.

What schools serve 12 21st St N, Great Falls, MT?

12 21st St N, Great Falls, MT is assigned to Great Falls High School (high), rated D-; Giant Springs Elementary School (elementary), rated D-; East Middle School (middle), rated C+. All sit in Great Falls Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12 21st St N, Great Falls, MT compare to other homes in Great Falls 59401?

Among the 4,418 homes in Great Falls 59401, it is worth more than 16% of them ($231,047 against a typical $298,394), its price per square foot is higher than 92% of them ($357 against a typical $257), it is bigger than 3% of them (648 ft² against a typical 1,138 ft²), its lot is bigger than 10% of them (3,746 ft² against a typical 0.17 ac) and it is newer than 54% of them (1937 against a typical 1930). Measured against all of Cascade County, it is worth more than 11% 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 12 21st St N, Great Falls, MT?

The 2026 property tax bill for 12 21st St N, Great Falls, MT was $1,285. The county assessed it at $214,700.

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