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Single Family ResidenceResidential
$1,193,689$1,049 / 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 91How 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 $1,000,000 on Aug 16, 2023

12 DUNCAN ST

CHARLESTON, SC 29403
2
Beds
2
Baths
1,138 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.
1850
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$1.2M
$1.1M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,000,000 · Aug 16, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,086 (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.$40,000 (2024)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$16,830
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,000,000

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.53 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.Single Family Residence
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.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 · 210 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

12 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.

  • Worth more than 80% of homes in Charleston County
  • Costs more per square foot than 96% of homes in Radcliffeborough
  • Smaller than 80% of homes in Charleston County
  • Among the smallest lots in Charleston County
  • Among the oldest homes in Charleston County

What homes are worth in Charleston 29403

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

This home
$303K$2.6M

This home is worth more than 72% of homes in Charleston 29403.

How it measures up in Charleston 29403

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

Estimated value$1,193,689
CheaperTypical $905,063Pricier

Pricier than 72% of homes nearby

Price per ft²$1049
CheaperTypical $643Pricier

Pricier than 96% of homes nearby

Living area1,138 ft²
SmallerTypical 1,546 ft²Bigger

Bigger than 24% of homes nearby

Lot size1,742 ft²
SmallerTypical 4,104 ft²Bigger

Bigger than 6% of homes nearby

Year built1850
OlderTypical 1938Newer

Newer than 4% of homes nearby

How 12 Duncan St ranks against every home in each area.
MeasureThis homeRadcliffeboroughCharleston 29403Charleston County
Estimated valuepricier than$1,193,68969% of homes72% of homes80% of homes
Price per ft²pricier than$104996% of homes96% of homes96% of homes
Living areabigger than1,138 ft²30% of homes24% of homes20% of homes
Lot sizebigger than1,742 ft²11% of homes6% of homesalmost no homes
Year builtnewer than185016% of homes4% of homesalmost no homes

About 12 Duncan St

How much is 12 Duncan St, Charleston, SC worth?

The TopHap Estimate for 12 Duncan St, Charleston, SC is $1,193,689 as of Aug 30, 2026. The likely range is $1,086,649 to $1,300,729. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12 Duncan St, Charleston, SC last sell?

12 Duncan St, Charleston, SC last sold on Aug 16, 2023 for $1,000,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 12 Duncan St, Charleston, SC?

12 Duncan St, Charleston, SC has 2 bedrooms, 2 bathrooms, 1,138 square feet of living space and a 0.04-acre lot.

When was 12 Duncan St, Charleston, SC built?

12 Duncan St, Charleston, SC was built in 1850, making it 176 years old. The building has 2 stories.

What schools serve 12 Duncan St, Charleston, SC?

12 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 12 Duncan St, Charleston, SC compare to other homes in Charleston 29403?

Among the 6,405 homes in Charleston 29403, it is worth more than 72% of them ($1,193,689 against a typical $905,063), its price per square foot is higher than 96% of them ($1049 against a typical $643), it is bigger than 24% of them (1,138 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 4% of them (1850 against a typical 1938). Measured against all of Charleston County, it is worth more than 80% 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 12 Duncan St, Charleston, SC?

The 2024 property tax bill for 12 Duncan St, Charleston, SC was $5,086. The county assessed it at $40,000.

More homes on Duncan St

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