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Single Family ResidentialResidential
$357,618
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 85How 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
Last sold for $269,000 on Jun 9, 2025

405 18TH ST NE

WATERTOWN, SD 57201
0
Baths
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.

Valuation

$358K
$305K low$410K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$269,000 · Jun 9, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,195 (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.$205,835 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$47,309
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$158,526
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$205,835

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residential
CountyCODINGTON
Lot (acres)The size of the land the home sits on, from county records.0.26
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Watertown High SchoolC
High · Grades 9–12 · 0.5 mi
E
Lincoln Elementary SchoolA
Elementary · Grades KG–4 · 0.5 mi
M
Watertown Middle SchoolA
Middle · Grades 7–8 · 1.2 mi

District: Watertown School District 14-4

Neighborhood · ZIP 57201These 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.119
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.22

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.93%
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.8.6%
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.26,802
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.81 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$70,378
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$83,941
Average tempThe average temperature here across a full year.43°F
Annual precipHow much rain and melted snow falls here in a typical year.23 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

405 18th St Ne 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.

What homes are worth in Watertown 57201

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

This home
$119K$725K

This home is worth more than 47% of homes in Watertown 57201.

How it measures up in Watertown 57201

The dot is this home. The mark in the middle is the typical home in Watertown 57201.

Estimated value$357,618
CheaperTypical $367,553Pricier

Pricier than 47% of homes nearby

Lot size0.26 ac
SmallerTypical 0.25 acBigger

Bigger than 53% of homes nearby

Year built1985
OlderTypical 1978Newer

Newer than 60% of homes nearby

How 405 18th St Ne ranks against every home in each area.
MeasureThis homeWatertown 57201
Estimated valuepricier than$357,61847% of homes
Lot sizebigger than0.26 ac53% of homes
Year builtnewer than198560% of homes

About 405 18th St Ne

How much is 405 18th St Ne, Watertown, SD worth?

The TopHap Estimate for 405 18th St Ne, Watertown, SD is $357,618 as of Aug 30, 2026. The likely range is $304,994 to $410,242. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 405 18th St Ne, Watertown, SD last sell?

405 18th St Ne, Watertown, SD last sold on Jun 9, 2025 for $269,000, according to the county's recorded deed.

When was 405 18th St Ne, Watertown, SD built?

405 18th St Ne, Watertown, SD was built in 1985, making it 41 years old.

What schools serve 405 18th St Ne, Watertown, SD?

405 18th St Ne, Watertown, SD is assigned to Watertown High School (high), rated C; Lincoln Elementary School (elementary), rated A; Watertown Middle School (middle), rated A. All sit in Watertown School District 14-4. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 405 18th St Ne, Watertown, SD compare to other homes in Watertown 57201?

Among the 10,095 homes in Watertown 57201, it is worth more than 47% of them ($357,618 against a typical $367,553), its lot is bigger than 53% of them (0.26 ac against a typical 0.25 ac) and it is newer than 60% of them (1985 against a typical 1978). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 405 18th St Ne, Watertown, SD?

The 2026 property tax bill for 405 18th St Ne, Watertown, SD was $2,195. The county assessed it at $205,835.

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