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Single Family ResidenceResidential
$194,343$202 / 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

421 TAMMY DR

POWELL, TN 37849
3
Beds
1
Baths
960 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.
1.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1975
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
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

$194K
$168K low$220K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$647 (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.$41,650 (2025)
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$166,600

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.Ranch
CountyKNOX
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.2014
Lot (acres)The size of the land the home sits on, from county records.1.32
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.No Foundation
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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.Porch · 60 ft²

Transaction History(2)

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
Brickey-McCloud Elementary SchoolB+
Elementary · Grades KG–5 · 2.0 mi
H
Powell High SchoolB-
High · Grades 9–12 · 2.3 mi
M
Powell Middle SchoolC-
Middle · Grades 6–8 · 3.2 mi

District: Knox County School District

Neighborhood · ZIP 37849These 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.116
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.149

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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.3%
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.28,630
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.727 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$77,070
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$93,980
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.54 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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 Tammy 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 less than 96% of homes in Powell 37849
  • Costs less per square foot than 66% of homes in Knox County
  • Smaller than 93% of homes in Powell 37849
  • Has a bigger lot than 86% of homes in Knox County
  • Older than 69% of homes in Powell 37849

What homes are worth in Powell 37849

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

This home
$161K$767K

This home is worth more than 4% of homes in Powell 37849.

How it measures up in Powell 37849

The dot is this home. The mark in the middle is the typical home in Powell 37849.

Estimated value$194,343
CheaperTypical $369,662Pricier

Pricier than 4% of homes nearby

Price per ft²$202
CheaperTypical $213Pricier

Pricier than 38% of homes nearby

Living area960 ft²
SmallerTypical 1,676 ft²Bigger

Bigger than 7% of homes nearby

Lot size1.32 ac
SmallerTypical 0.47 acBigger

Bigger than 80% of homes nearby

Year built1975
OlderTypical 1992Newer

Newer than 31% of homes nearby

How 421 Tammy Dr ranks against every home in each area.
MeasureThis homePowell 37849Knox County
Estimated valuepricier than$194,3434% of homes8% of homes
Price per ft²pricier than$20238% of homes34% of homes
Living areabigger than960 ft²7% of homes9% of homes
Lot sizebigger than1.32 ac80% of homes86% of homes
Year builtnewer than197531% of homes40% of homes

About 421 Tammy Dr

How much is 421 Tammy Dr, Powell, TN worth?

The TopHap Estimate for 421 Tammy Dr, Powell, TN is $194,343 as of Sep 24, 2026. The likely range is $168,410 to $220,276. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Tammy Dr, Powell, TN last sell?

421 Tammy Dr, Powell, TN last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 421 Tammy Dr, Powell, TN?

421 Tammy Dr, Powell, TN has 3 bedrooms, 1 bathrooms, 960 square feet of living space and a 1.32-acre lot.

When was 421 Tammy Dr, Powell, TN built?

421 Tammy Dr, Powell, TN was built in 1975, making it 51 years old. It is a ranch home. The building has 1 story.

What schools serve 421 Tammy Dr, Powell, TN?

421 Tammy Dr, Powell, TN is assigned to Brickey-McCloud Elementary School (elementary), rated B+; Powell High School (high), rated B-; Powell Middle School (middle), rated C-. All sit in Knox County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Tammy Dr, Powell, TN compare to other homes in Powell 37849?

Among the 10,745 homes in Powell 37849, it is worth more than 4% of them ($194,343 against a typical $369,662), its price per square foot is higher than 38% of them ($202 against a typical $213), it is bigger than 7% of them (960 ft² against a typical 1,676 ft²), its lot is bigger than 80% of them (1.32 ac against a typical 0.47 ac) and it is newer than 31% of them (1975 against a typical 1992). Measured against all of Knox County, it is worth more than 8% 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 Tammy Dr, Powell, TN?

The 2025 property tax bill for 421 Tammy Dr, Powell, TN was $647. The county assessed it at $41,650.

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