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Duplex (2 Units, Any Combination)Residential
Last sold for $510,000 on Jul 20, 2021

21 DUNCAN ST

CHARLESTON, SC 29403
6
Beds
2
Baths
1,638 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.
1,742 ft²
Lot SizeThe size of the land the home sits on, from county records.
1840
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$510,000 · Jul 20, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,888 (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.$30,600 (2024)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$30,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$510,000

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.59 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.99%

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
CountyCharleston
Lot (acres)The size of the land the home sits on, from county records.0.04
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.Heat Pump
CoolingThe type of cooling or air conditioning in the home.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.Deck · 9 ft²Patio · 9 ft²Porch · 200 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.

E
Memminger School Of Global StudiesD-
Elementary · Grades PK–5 · 0.4 mi
M
Simmons-Pinckney Middle SchoolC-
Middle · Grades 6–8 · 0.9 mi
H
Burke High SchoolF
High · Grades 9–12 · 0.9 mi

District: Charleston County School District

Neighborhood · ZIP 29403These 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.136
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.337

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.77%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.21%
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.22,498
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,949 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$69,730
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,723
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 Duncan St 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.

  • Among the smallest lots in Charleston County
  • Among the oldest homes in Charleston County

How it measures up in Charleston 29403

The dot is this home. The mark in the middle is the typical home in Charleston 29403.

Living area1,638 ft²
SmallerTypical 1,546 ft²Bigger

Bigger than 55% of homes nearby

Lot size1,742 ft²
SmallerTypical 4,104 ft²Bigger

Bigger than 6% of homes nearby

Year built1840
OlderTypical 1938Newer

Newer than 3% of homes nearby

How 21 Duncan St ranks against every home in each area.
MeasureThis homeRadcliffeboroughCharleston 29403Charleston County
Living areabigger than1,638 ft²58% of homes55% of homes47% of homes
Lot sizebigger than1,742 ft²11% of homes6% of homesalmost no homes
Year builtnewer than184014% of homes3% of homesalmost no homes

About 21 Duncan St

When did 21 Duncan St, Charleston, SC last sell?

21 Duncan St, Charleston, SC last sold on Jul 20, 2021 for $510,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 21 Duncan St, Charleston, SC?

21 Duncan St, Charleston, SC has 6 bedrooms, 2 bathrooms, 1,638 square feet of living space and a 0.04-acre lot.

When was 21 Duncan St, Charleston, SC built?

21 Duncan St, Charleston, SC was built in 1840, making it 186 years old. The building has 2 stories.

What schools serve 21 Duncan St, Charleston, SC?

21 Duncan St, Charleston, SC is assigned to Memminger School Of Global Studies (elementary), rated D-; Simmons-Pinckney Middle School (middle), rated C-; Burke High School (high), rated F. All sit in Charleston County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Duncan St, Charleston, SC compare to other homes in Charleston 29403?

Among the 6,405 homes in Charleston 29403, it is bigger than 55% of them (1,638 ft² against a typical 1,546 ft²), its lot is bigger than 6% of them (1,742 ft² against a typical 4,104 ft²) and it is newer than 3% of them (1840 against a typical 1938). 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 Duncan St, Charleston, SC?

The 2024 property tax bill for 21 Duncan St, Charleston, SC was $8,888. The county assessed it at $30,600.

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Assigned schools

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