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Single Family ResidenceResidential
$398,591$361 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

421 DECLARATION AVE

BILLINGS, MT 59105
3
Beds
2 / 1
Baths
1,104 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.
0.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1981
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$399K
$373K low$424K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,817 (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.$357,200 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$300,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$357,200

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.15
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
45
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
30
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Split Level
CountyYellowstone
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.2010
Lot (acres)The size of the land the home sits on, from county records.0.25
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Prefab
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.Deck · 192 ft²Porch · 24 ft²

Transaction History(4)

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
Sandston Elementary SchoolC+
Elementary · Grades KG–5 · 0.2 mi
M
Castle Rock Middle SchoolC-
Middle · Grades 6–8 · 0.5 mi
H
Skyview High SchoolC-
High · Grades 9–12 · 1.1 mi

District: Billings Elementary School District

Neighborhood · ZIP 59105These 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.67
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.32

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.33,530
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.349 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$77,395
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$96,841
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.15 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.60%

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

421 Declaration 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.

  • Costs more per square foot than 91% of homes in Billings 59105
  • Smaller than 81% of homes in Billings 59105

What homes are worth in Billings 59105

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

This home
$227K$690K

This home is worth more than 54% of homes in Billings 59105.

How it measures up in Billings 59105

The dot is this home. The mark in the middle is the typical home in Billings 59105.

Estimated value$398,591
CheaperTypical $389,900Pricier

Pricier than 54% of homes nearby

Price per ft²$361
CheaperTypical $276Pricier

Pricier than 91% of homes nearby

Living area1,104 ft²
SmallerTypical 1,379 ft²Bigger

Bigger than 19% of homes nearby

Lot size0.25 ac
SmallerTypical 0.25 acBigger

Bigger than 51% of homes nearby

Year built1981
OlderTypical 1987Newer

Newer than 41% of homes nearby

How 421 Declaration Ave ranks against every home in each area.
MeasureThis homeBillings 59105Yellowstone County
Estimated valuepricier than$398,59154% of homes56% of homes
Price per ft²pricier than$36191% of homes88% of homes
Living areabigger than1,104 ft²19% of homes27% of homes
Lot sizebigger than0.25 ac51% of homes58% of homes
Year builtnewer than198141% of homes52% of homes

About 421 Declaration Ave

How much is 421 Declaration Ave, Billings, MT worth?

The TopHap Estimate for 421 Declaration Ave, Billings, MT is $398,591 as of Aug 30, 2026. The likely range is $373,373 to $423,809. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Declaration Ave, Billings, MT last sell?

421 Declaration Ave, Billings, MT last sold on Sep 24, 2009, according to the county's recorded deed.

How big is 421 Declaration Ave, Billings, MT?

421 Declaration Ave, Billings, MT has 3 bedrooms, 2 bathrooms, 1,104 square feet of living space and a 0.25-acre lot.

When was 421 Declaration Ave, Billings, MT built?

421 Declaration Ave, Billings, MT was built in 1981, making it 45 years old. It is a split level home. The building has 2 stories.

What schools serve 421 Declaration Ave, Billings, MT?

421 Declaration Ave, Billings, MT is assigned to Sandston Elementary School (elementary), rated C+; Castle Rock Middle School (middle), rated C-; Skyview High School (high), rated C-. All sit in Billings Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Declaration Ave, Billings, MT compare to other homes in Billings 59105?

Among the 12,504 homes in Billings 59105, it is worth more than 54% of them ($398,591 against a typical $389,900), its price per square foot is higher than 91% of them ($361 against a typical $276), it is bigger than 19% of them (1,104 ft² against a typical 1,379 ft²), its lot is bigger than 51% of them (0.25 ac against a typical 0.25 ac) and it is newer than 41% of them (1981 against a typical 1987). Measured against all of Yellowstone County, it is worth more than 56% 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 Declaration Ave, Billings, MT?

The 2025 property tax bill for 421 Declaration Ave, Billings, MT was $1,817. The county assessed it at $357,200.

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