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Single Family ResidenceResidential
$529,962$430 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $500,250 on Apr 18, 2025

643 SEMAHT ST

CHARLESTON, SC 29412
3
Beds
2
Baths
1,232 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$530K
$479K low$581K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$500,250 · Apr 18, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,053 (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.$6,750 (2024)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$6,750
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$317,900

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.49 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.98%

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.Ranch
CountyCharleston
Lot (acres)The size of the land the home sits on, from county records.0.34
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
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.Deck · 156 ft²Patio · 156 ft²Porch · 533 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
Murray-LaSaine Montessori SchoolB
Elementary · Grades KG–5 · 0.7 mi
M
Camp Road Middle SchoolA-
Middle · Grades 6–8 · 1.6 mi
H
James Island Charter High SchoolA+
High · Grades 9–12 · 3.8 mi

District: Charleston County School District

Neighborhood · ZIP 29412These 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.75
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.81
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.326

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.2%
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.42,648
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.840 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$101,186
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$128,717
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%

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

643 Semaht 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.

  • Costs more per square foot than 73% of homes in Charleston 29412
  • Smaller than 76% of homes in Charleston 29412
  • Has a bigger lot than 68% of homes in Charleston County

What homes are worth in Charleston 29412

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

This home
$247K$2M

This home is worth more than 37% of homes in Charleston 29412.

How it measures up in Charleston 29412

The dot is this home. The mark in the middle is the typical home in Charleston 29412.

Estimated value$529,962
CheaperTypical $616,938Pricier

Pricier than 37% of homes nearby

Price per ft²$430
CheaperTypical $370Pricier

Pricier than 73% of homes nearby

Living area1,232 ft²
SmallerTypical 1,625 ft²Bigger

Bigger than 24% of homes nearby

Lot size0.34 ac
SmallerTypical 0.29 acBigger

Bigger than 59% of homes nearby

Year built1985
OlderTypical 1985Newer

Newer than 51% of homes nearby

How 643 Semaht St ranks against every home in each area.
MeasureThis homeCharleston 29412Charleston County
Estimated valuepricier than$529,96237% of homes40% of homes
Price per ft²pricier than$43073% of homes67% of homes
Living areabigger than1,232 ft²24% of homes25% of homes
Lot sizebigger than0.34 ac59% of homes68% of homes
Year builtnewer than198551% of homes45% of homes

About 643 Semaht St

How much is 643 Semaht St, Charleston, SC worth?

The TopHap Estimate for 643 Semaht St, Charleston, SC is $529,962 as of Jul 14, 2026. The likely range is $479,341 to $580,583. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 643 Semaht St, Charleston, SC last sell?

643 Semaht St, Charleston, SC last sold on Apr 18, 2025 for $500,250, according to the county's recorded deed.

How big is 643 Semaht St, Charleston, SC?

643 Semaht St, Charleston, SC has 3 bedrooms, 2 bathrooms, 1,232 square feet of living space and a 0.34-acre lot.

When was 643 Semaht St, Charleston, SC built?

643 Semaht St, Charleston, SC was built in 1985, making it 41 years old. It is a ranch home. The building has 2 stories.

What schools serve 643 Semaht St, Charleston, SC?

643 Semaht St, Charleston, SC is assigned to Murray-LaSaine Montessori School (elementary), rated B; Camp Road Middle School (middle), rated A-; James Island Charter High School (high), rated A+. All sit in Charleston County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 643 Semaht St, Charleston, SC compare to other homes in Charleston 29412?

Among the 16,514 homes in Charleston 29412, it is worth more than 37% of them ($529,962 against a typical $616,938), its price per square foot is higher than 73% of them ($430 against a typical $370), it is bigger than 24% of them (1,232 ft² against a typical 1,625 ft²), its lot is bigger than 59% of them (0.34 ac against a typical 0.29 ac) and it is newer than 51% of them (1985 against a typical 1985). Measured against all of Charleston County, it is worth more than 40% 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 643 Semaht St, Charleston, SC?

The 2024 property tax bill for 643 Semaht St, Charleston, SC was $1,053. The county assessed it at $6,750.

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Assigned schools

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