Sullivans Island, Charleston County, South Carolina Property Taxes
Median Sullivans Island, SC effective property tax rate: 0.45%, significantly lower than the national median of 1.02%, but lower than the SC state median of 0.72%.
Median Sullivans Island, SC home value: $1,756,450
Median annual Sullivans Island, SC tax bill: $11,095, $8,695 higher than the national median property tax bill of $2,400.
How are property taxes in Charleston calculated?
Property taxes in Sullivans Island, SC are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Sullivans Island’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Sullivans Island, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Sullivans Island, Charleston County, South Carolina Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.45%
Estimate Property Tax Bill
$7,904
$7,335
Property Tax Rates Across Sullivans Island, Charleston County, South Carolina
Local government entities set tax rates, which can vary widely within a state. Each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate. While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
In Sullivans Island, Charleston County, the effective property tax rate is notably lower compared to the national median of 1.02%. With a rate of 0.45%, residents benefit from one of the more favorable tax environments in the country. This is significant when considering that the median property tax bill in the U.S. is $2,400. Sullivans Island’s rate is consistent across the region, offering predictability for homeowners. This uniformity can be a relief for property owners who prefer stable and predictable expenses. The lower tax rate can make Sullivans Island an attractive option for those looking to optimize their property investments.
Property Tax Rates Across Sullivans Island, Charleston County, South Carolina
Source: Ownwell

0.37%
1.09%
1.81%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Sullivans Island Tax Rate
0.45%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Charleston County Tax Rate
0.53%
Median Effective South Carolina Tax Rate
0.72%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Sullivans Island, Charleston County, South Carolina
Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
29482 | 0.35% | 0.41% | 0.45% | 1.39% | 1.57% |
Source: Ownwell
Property Tax Assessment Values Across Sullivans Island, Charleston County, South Carolina
When examining property taxes in Sullivans Island, SC, understanding the distinction between "market value" and "assessed value" is crucial. The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Charleston County Assessor's Office estimates the market value for tax purposes. The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
In Charleston County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of April. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Sullivans Island. For example, the median home price in Sullivans Island is $1,756,450, with tax bills ranging significantly across the county. Zip code 29482 has the highest median home price at $1,756,450.
Property Tax Assessment Values Across Sullivans Island, Charleston County, South Carolina
Source: Ownwell

$25,350
$890,900
$1,756,450
Median Sullivans Island Market Value
$1,756,450
Median Charleston County Market Value
$305,700
Median South Carolina Market Value
$140,000
Median United States Market Value
$235,294
Property Tax Assessment Values Across Sullivans Island, Charleston County, South Carolina
Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
29482 | $925,000 | $1,191,250 | $1,756,450 | $2,748,750 | $3,601,500 |
Source: Ownwell
Property Tax Bills Across Sullivans Island, Charleston County, South Carolina
In Sullivans Island, located in Charleston County, SC, property tax bills are determined by multiplying the assessed value of a home by the local tax rate. The assessed value is a percentage of the property's market value, which is influenced by factors such as location, size, and amenities. For homeowners in Sullivans Island, the median home price is $1,756,450, leading to tax bills that can be significantly higher than the national median property tax bill of $2,400. In this area, the median tax bill is $11,095, with the 25th percentile at $6,231 and the 75th percentile reaching $20,838.
High property tax bills can be burdensome for homeowners, but Ownwell offers a solution. By providing property tax appeal and exemption services, Ownwell helps homeowners potentially reduce their tax bills. Our experts analyze property assessments to identify discrepancies and file appeals on behalf of homeowners. This service can lead to significant savings, making homeownership more affordable in high-tax areas like Sullivans Island.
Property Tax Bills Across Sullivans Island, Charleston County, South Carolina
Source: Ownwell

$366
$5,731
$11,095
Median Sullivans Island Tax Bill
$11,095
Median Charleston County Tax Bill
$1,751
Median South Carolina Tax Bill
$1,086
Median United States Tax Bill
$2,400
Property Tax Bills Across Sullivans Island, Charleston County, South Carolina
Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
29482 | $3,888 | $6,231 | $11,095 | $20,838 | $41,419 |
Source: Ownwell