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Single Family ResidenceResidential
$655,474$700 / 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 92How 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

21 RIVERDALE DR

CHARLESTON, SC 29407
2
Beds
1
Baths
936 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1949
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$655K
$604K low$707K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,268 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$14,520 (2024)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$14,520
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$302,200

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.72 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.86%

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.Bungalow
CountyCharleston
Lot (acres)The size of the land the home sits on, from county records.0.26
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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 · 161 ft²

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

E
St. Andrew's School of Math & ScienceB+
Elementary · Grades PK–5 · 0.4 mi
H
West Ashley High SchoolB
High · Grades 9–12 · 6.0 mi
M
C.E. Williams Middle SchoolC
Middle · Grades 6–8 · 6.0 mi

District: Charleston County School District

Neighborhood · ZIP 29407These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.349

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.37,520
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,108 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,865
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$108,457
Average tempThe average temperature here across a full year.66°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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

21 Riverdale 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.

  • Costs more per square foot than 96% of homes in Charleston 29407
  • Smaller than 91% of homes in Charleston County
  • Older than 91% of homes in Charleston County

What homes are worth in Charleston 29407

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

This home
$222K$2.2M

This home is worth more than 62% of homes in Charleston 29407.

How it measures up in Charleston 29407

The dot is this home. The mark in the middle is the typical home in Charleston 29407.

Estimated value$655,474
CheaperTypical $573,273Pricier

Pricier than 62% of homes nearby

Price per ft²$700
CheaperTypical $355Pricier

Pricier than 96% of homes nearby

Living area936 ft²
SmallerTypical 1,555 ft²Bigger

Bigger than 10% of homes nearby

Lot size0.26 ac
SmallerTypical 0.26 acBigger

Bigger than 51% of homes nearby

Year built1949
OlderTypical 1964Newer

Newer than 10% of homes nearby

How 21 Riverdale Dr ranks against every home in each area.
MeasureThis homeCharleston 29407Charleston County
Estimated valuepricier than$655,47462% of homes54% of homes
Price per ft²pricier than$70096% of homes86% of homes
Living areabigger than936 ft²10% of homes9% of homes
Lot sizebigger than0.26 ac51% of homes57% of homes
Year builtnewer than194910% of homes9% of homes

About 21 Riverdale Dr

How much is 21 Riverdale Dr, Charleston, SC worth?

The TopHap Estimate for 21 Riverdale Dr, Charleston, SC is $655,474 as of Aug 30, 2026. The likely range is $604,414 to $706,534. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Riverdale Dr, Charleston, SC last sell?

21 Riverdale Dr, Charleston, SC last sold on Feb 14, 2003, according to the county's recorded deed.

How big is 21 Riverdale Dr, Charleston, SC?

21 Riverdale Dr, Charleston, SC has 2 bedrooms, 1 bathrooms, 936 square feet of living space and a 0.26-acre lot.

When was 21 Riverdale Dr, Charleston, SC built?

21 Riverdale Dr, Charleston, SC was built in 1949, making it 77 years old. It is a bungalow home. The building has 1 story.

What schools serve 21 Riverdale Dr, Charleston, SC?

21 Riverdale Dr, Charleston, SC is assigned to St. Andrew's School of Math & Science (elementary), rated B+; West Ashley High School (high), rated B; C.E. Williams Middle School (middle), rated C. All sit in Charleston County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Riverdale Dr, Charleston, SC compare to other homes in Charleston 29407?

Among the 12,242 homes in Charleston 29407, it is worth more than 62% of them ($655,474 against a typical $573,273), its price per square foot is higher than 96% of them ($700 against a typical $355), it is bigger than 10% of them (936 ft² against a typical 1,555 ft²), its lot is bigger than 51% of them (0.26 ac against a typical 0.26 ac) and it is newer than 10% of them (1949 against a typical 1964). Measured against all of Charleston County, it is worth more than 54% 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 21 Riverdale Dr, Charleston, SC?

The 2024 property tax bill for 21 Riverdale Dr, Charleston, SC was $4,268. The county assessed it at $14,520.

More homes on Riverdale Dr

Closest homes

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Assigned schools

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