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Single Family ResidenceResidential
$664,388$274 / 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 Sep 24, 2026

521 RIVER RUN DR

MARYVILLE, TN 37804
3
Baths
2,421 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.
0.7 ac
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$664K
$579K low$750K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,017 (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.$126,825 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$23,625
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$103,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$126,825
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$507,300

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.103 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
CountyBlount
Lot (acres)The size of the land the home sits on, from county records.0.70
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Footing
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Package
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Finished
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 · 448 ft²Patio · 448 ft²Porch · 389 ft²

Transaction History(3)

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
Heritage High SchoolB+
High · Grades 9–12 · 0.8 mi
M
Heritage Middle SchoolD+
Middle · Grades 6–8 · 1.0 mi
E
Porter Elementary SchoolA
Elementary · Grades PK–5 · 2.0 mi

District: Blount County School District

Neighborhood · ZIP 37804These 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.91
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.160

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.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.5%
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.28,243
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.838 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$71,951
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$81,068
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.51 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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

521 River Run Dr 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 93% of homes in Maryville 37804
  • Costs more per square foot than 86% of homes in Maryville 37804
  • Bigger than 87% of homes in Maryville 37804
  • Has a bigger lot than 76% of homes in Maryville 37804
  • Newer than 85% of homes in Maryville 37804

What homes are worth in Maryville 37804

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

This home
$153K$898K

This home is worth more than 93% of homes in Maryville 37804.

How it measures up in Maryville 37804

The dot is this home. The mark in the middle is the typical home in Maryville 37804.

Estimated value$664,388
CheaperTypical $341,381Pricier

Pricier than 93% of homes nearby

Price per ft²$274
CheaperTypical $224Pricier

Pricier than 86% of homes nearby

Living area2,421 ft²
SmallerTypical 1,520 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.7 ac
SmallerTypical 0.4 acBigger

Bigger than 76% of homes nearby

Year built2006
OlderTypical 1981Newer

Newer than 85% of homes nearby

How 521 River Run Dr ranks against every home in each area.
MeasureThis homeMaryville 37804Blount County
Estimated valuepricier than$664,38893% of homes86% of homes
Price per ft²pricier than$27486% of homes74% of homes
Living areabigger than2,421 ft²87% of homes83% of homes
Lot sizebigger than0.7 ac76% of homes56% of homes
Year builtnewer than200685% of homes83% of homes

About 521 River Run Dr

How much is 521 River Run Dr, Maryville, TN worth?

The TopHap Estimate for 521 River Run Dr, Maryville, TN is $664,388 as of Sep 24, 2026. The likely range is $578,652 to $750,124. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 River Run Dr, Maryville, TN last sell?

521 River Run Dr, Maryville, TN last sold on Jun 1, 2005, according to the county's recorded deed.

How big is 521 River Run Dr, Maryville, TN?

521 River Run Dr, Maryville, TN has 3 bathrooms, 2,421 square feet of living space and a 0.70-acre lot.

When was 521 River Run Dr, Maryville, TN built?

521 River Run Dr, Maryville, TN was built in 2006, making it 20 years old. The building has 1 story.

What schools serve 521 River Run Dr, Maryville, TN?

521 River Run Dr, Maryville, TN is assigned to Heritage High School (high), rated B+; Heritage Middle School (middle), rated D+; Porter Elementary School (elementary), rated A. All sit in Blount County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 River Run Dr, Maryville, TN compare to other homes in Maryville 37804?

Among the 10,758 homes in Maryville 37804, it is worth more than 93% of them ($664,388 against a typical $341,381), its price per square foot is higher than 86% of them ($274 against a typical $224), it is bigger than 87% of them (2,421 ft² against a typical 1,520 ft²), its lot is bigger than 76% of them (0.7 ac against a typical 0.4 ac) and it is newer than 85% of them (2006 against a typical 1981). Measured against all of Blount County, it is worth more than 86% 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 521 River Run Dr, Maryville, TN?

The 2025 property tax bill for 521 River Run Dr, Maryville, TN was $2,017. The county assessed it at $126,825.

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