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Single Family ResidenceResidential
$1,056,194$454 / 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 93How 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
Last sold for $1,100,000 on Mar 24, 2022

13634 HIGHWAY 40

KEYSTONE, SD 57751
3
Beds
2 / 1
Baths
2,325 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.
3.45 ac
Lot SizeThe size of the land the home sits on, from county records.
2000
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.1M
$983K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,100,000 · Mar 24, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,165 (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.$893,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$148,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$744,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$893,100

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.197 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 percent flood zone

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.Rustic
CountyPENNINGTON
Lot (acres)The size of the land the home sits on, from county records.3.45
ConstructionThe main material the home's frame and walls are built from.Log
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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 · 238 ft²

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

E
Hermosa Elementary - 04B-
Elementary · Grades PK–6 · 7.1 mi
H
Custer High School - 01C+
High · Grades 9–12 · 14.3 mi

District: Custer School District 16-1

Neighborhood · ZIP 57751These 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.109
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 100.39

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.78%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.6%
PopulationHow many people live in this area.794
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.12 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$111,312
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$130,793
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.20 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.63%

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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

13634 Highway 40 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 more than 97% of homes in Pennington County
  • Costs more per square foot than 92% of homes in Pennington County
  • Bigger than 80% of homes in Pennington County
  • Has a bigger lot than 91% of homes in Pennington County
  • Newer than 71% of homes in Pennington County

What homes are worth in Keystone 57751

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

This home
$241K$1.9M

This home is worth more than 89% of homes in Keystone 57751.

How it measures up in Keystone 57751

The dot is this home. The mark in the middle is the typical home in Keystone 57751.

Estimated value$1,056,194
CheaperTypical $641,188Pricier

Pricier than 89% of homes nearby

Price per ft²$454
CheaperTypical $443Pricier

Pricier than 54% of homes nearby

Living area2,325 ft²
SmallerTypical 1,600 ft²Bigger

Bigger than 79% of homes nearby

Lot size3.45 ac
SmallerTypical 3.19 acBigger

Bigger than 55% of homes nearby

Year built2000
OlderTypical 1996Newer

Newer than 58% of homes nearby

How 13634 Highway 40 ranks against every home in each area.
MeasureThis homeKeystone 57751Pennington County
Estimated valuepricier than$1,056,19489% of homes97% of homes
Price per ft²pricier than$45454% of homes92% of homes
Living areabigger than2,325 ft²79% of homes80% of homes
Lot sizebigger than3.45 ac55% of homes91% of homes
Year builtnewer than200058% of homes71% of homes

About 13634 Highway 40

How much is 13634 Highway 40, Keystone, SD worth?

The TopHap Estimate for 13634 Highway 40, Keystone, SD is $1,056,194 as of Sep 24, 2026. The likely range is $982,636 to $1,129,752. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 13634 Highway 40, Keystone, SD last sell?

13634 Highway 40, Keystone, SD last sold on Mar 24, 2022 for $1,100,000, according to the county's recorded deed.

How big is 13634 Highway 40, Keystone, SD?

13634 Highway 40, Keystone, SD has 3 bedrooms, 2 bathrooms, 2,325 square feet of living space and a 3.45-acre lot.

When was 13634 Highway 40, Keystone, SD built?

13634 Highway 40, Keystone, SD was built in 2000, making it 26 years old. It is a rustic home.

What schools serve 13634 Highway 40, Keystone, SD?

13634 Highway 40, Keystone, SD is assigned to Hermosa Elementary - 04 (elementary), rated B-; Custer High School - 01 (high), rated C+. All sit in Custer School District 16-1. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 13634 Highway 40, Keystone, SD compare to other homes in Keystone 57751?

Among the 447 homes in Keystone 57751, it is worth more than 89% of them ($1,056,194 against a typical $641,188), its price per square foot is higher than 54% of them ($454 against a typical $443), it is bigger than 79% of them (2,325 ft² against a typical 1,600 ft²), its lot is bigger than 55% of them (3.45 ac against a typical 3.19 ac) and it is newer than 58% of them (2000 against a typical 1996). Measured against all of Pennington County, it is worth more than 97% 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 13634 Highway 40, Keystone, SD?

The 2025 property tax bill for 13634 Highway 40, Keystone, SD was $11,165. The county assessed it at $893,100.

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