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Single Family ResidenceResidential
$163,001$243 / 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 87How 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 SOUTH ST

RAPID CITY, SD 57701
3
Beds
1
Baths
672 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.
3,485 ft²
Lot SizeThe size of the land the home sits on, from county records.
1908
Year BuiltThe year the home was originally built, according to county records.

Valuation

$163K
$142K low$184K 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.$163,001
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$130,401

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,314 (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.$173,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$38,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$135,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$173,300

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.Bungalow
CountyPennington
Lot (acres)The size of the land the home sits on, from county records.0.08
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 138 ft²Porch · 144 ft²

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

E
South Park Elementary SchoolD+
Elementary · Grades KG–5 · 0.8 mi
H
Central High SchoolD
High · Grades 9–12 · 0.9 mi
M
South Middle SchoolD+
Middle · Grades 6–8 · 1.0 mi

District: Rapid City Area Schools

Neighborhood · ZIP 57701These 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.129
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.30

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.5%
PopulationHow many people live in this area.45,780
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.728 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$54,251
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$68,885
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.18 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.63%

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.No

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 South St 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.

  • Among the least valuable homes in Pennington County
  • Costs less per square foot than 84% of homes in Pennington County
  • Smaller than 98% of homes in Pennington County
  • Has a smaller lot than 98% of homes in Rapid City 57701
  • Among the oldest homes in Rapid City 57701

What homes are worth in Rapid City 57701

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

This home
$168K$801K

This home is worth more than 2% of homes in Rapid City 57701.

How it measures up in Rapid City 57701

The dot is this home. The mark in the middle is the typical home in Rapid City 57701.

Estimated value$163,001
CheaperTypical $301,549Pricier

Pricier than 2% of homes nearby

Price per ft²$243
CheaperTypical $286Pricier

Pricier than 25% of homes nearby

Living area672 ft²
SmallerTypical 1,145 ft²Bigger

Bigger than 3% of homes nearby

Lot size3,485 ft²
SmallerTypical 0.19 acBigger

Bigger than 2% of homes nearby

Year built1908
OlderTypical 1972Newer

Older than almost all homes nearby

How 421 South St ranks against every home in each area.
MeasureThis homeRapid City 57701Pennington County
Estimated valuepricier than$163,0012% of homesalmost no homes
Price per ft²pricier than$24325% of homes16% of homes
Living areabigger than672 ft²3% of homes2% of homes
Lot sizebigger than3,485 ft²2% of homes2% of homes
Year builtnewer than1908almost no homesalmost no homes

About 421 South St

How much is 421 South St, Rapid City, SD worth?

The TopHap Estimate for 421 South St, Rapid City, SD is $163,001 as of Jul 14, 2026. The likely range is $141,934 to $184,068. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 421 South St, Rapid City, SD?

421 South St, Rapid City, SD has 3 bedrooms, 1 bathrooms, 672 square feet of living space and a 0.08-acre lot.

When was 421 South St, Rapid City, SD built?

421 South St, Rapid City, SD was built in 1908, making it 118 years old. It is a bungalow home.

What schools serve 421 South St, Rapid City, SD?

421 South St, Rapid City, SD is assigned to South Park Elementary School (elementary), rated D+; Central High School (high), rated D; South Middle School (middle), rated D+. All sit in Rapid City Area Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 South St, Rapid City, SD compare to other homes in Rapid City 57701?

Among the 13,906 homes in Rapid City 57701, it is worth more than 2% of them ($163,001 against a typical $301,549), its price per square foot is higher than 25% of them ($243 against a typical $286), it is bigger than 3% of them (672 ft² against a typical 1,145 ft²), its lot is bigger than 2% of them (3,485 ft² against a typical 0.19 ac) and it is newer than almost none of them (1908 against a typical 1972). Measured against all of Pennington County, it is worth more than almost no 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 South St, Rapid City, SD?

The 2025 property tax bill for 421 South St, Rapid City, SD was $2,314. The county assessed it at $173,300.

More homes on South St

Closest homes

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Assigned schools

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