Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential

18 21ST AVE

ISLE OF PALMS, SC 29451
3
Beds
2
Baths
2,364 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.
0.43 ac
Lot SizeThe size of the land the home sits on, from county records.
1962
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,468 (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.$16,980 (2024)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$16,980
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$575,000

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.63 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
CountyCharleston
Lot (acres)The size of the land the home sits on, from county records.0.43
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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 · 204 ft²

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

E
Sullivan's Island Elementary SchoolA+
Elementary · Grades PK–5 · 3.9 mi
M
Moultrie Middle SchoolA+
Middle · Grades 6–8 · 5.1 mi
H
Wando High SchoolA+
High · Grades 9–12 · 6.7 mi

District: Charleston County School District

Neighborhood · ZIP 29451These 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.130
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.80
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.291

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.55%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.5,565
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.443 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$158,034
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$228,227
Average tempThe average temperature here across a full year.65°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.63%

Owner Tools

Do you own this home?
Claim this home

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

18 21st Ave 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.

  • Bigger than 74% of homes in Charleston County
  • Has a bigger lot than 80% of homes in Isle of Palms 29451
  • Older than 92% of homes in Isle of Palms 29451

How it measures up in Isle of Palms 29451

The dot is this home. The mark in the middle is the typical home in Isle of Palms 29451.

Living area2,364 ft²
SmallerTypical 2,048 ft²Bigger

Bigger than 60% of homes nearby

Lot size0.43 ac
SmallerTypical 0.25 acBigger

Bigger than 80% of homes nearby

Year built1962
OlderTypical 1986Newer

Newer than 8% of homes nearby

How 18 21st Ave ranks against every home in each area.
MeasureThis homeIsle of Palms 29451Charleston County
Living areabigger than2,364 ft²60% of homes74% of homes
Lot sizebigger than0.43 ac80% of homes78% of homes
Year builtnewer than19628% of homes18% of homes

About 18 21st Ave

When did 18 21st Ave, Isle Of Palms, SC last sell?

18 21st Ave, Isle Of Palms, SC last sold on Feb 27, 1984, according to the county's recorded deed.

How big is 18 21st Ave, Isle Of Palms, SC?

18 21st Ave, Isle Of Palms, SC has 3 bedrooms, 2 bathrooms, 2,364 square feet of living space and a 0.43-acre lot.

When was 18 21st Ave, Isle Of Palms, SC built?

18 21st Ave, Isle Of Palms, SC was built in 1962, making it 64 years old. The building has 2 stories.

What schools serve 18 21st Ave, Isle Of Palms, SC?

18 21st Ave, Isle Of Palms, SC is assigned to Sullivan's Island Elementary School (elementary), rated A+; Moultrie Middle School (middle), rated A+; Wando 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 18 21st Ave, Isle Of Palms, SC compare to other homes in Isle of Palms 29451?

Among the 4,578 homes in Isle of Palms 29451, it is bigger than 60% of them (2,364 ft² against a typical 2,048 ft²), its lot is bigger than 80% of them (0.43 ac against a typical 0.25 ac) and it is newer than 8% of them (1962 against a typical 1986). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 18 21st Ave, Isle Of Palms, SC?

The 2024 property tax bill for 18 21st Ave, Isle Of Palms, SC was $1,468. The county assessed it at $16,980.

More homes on 21st Ave

Closest homes

More homes in Isle Of Palms 29451

Assigned schools

Explore the area

See this home in context

Open 18 21st Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map