Property Taxes in Dewees Island, South Carolina
Median Dewees Island, South Carolina effective property tax rate: 1.24%, significantly higher than the national median of 1.02%, and higher than the South Carolina state median of 0.66%.
Median Dewees Island, South Carolina home value: $805,000
Median annual Dewees Island, South Carolina tax bill: $6,312, $3,912 higher than the national median property tax bill of $2,400.
How are property taxes in Charleston calculated?
Property taxes in Dewees Island, South Carolina 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 Dewees Island's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Dewees Island, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Dewees Island Property Tax Calculator Work?
Use this Dewees Island property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Dewees Island's median effective tax rate of 1.24% — based on actual property records in Charleston County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Dewees Island's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Dewees Island: rates range from 1.24% in 29451 to 1.24% in 29451, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Dewees Island.
About Dewees Island Property Taxes
About Property Taxes in Dewees Island, Charleston, South Carolina
Dewees Island's median effective property tax rate of 1.24% is lower than the South Carolina state median of 0.66% and higher than the national median of 1.02%. This rate reflects the Charleston County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Dewees Island. Homeowners in the 29451 ZIP code carry a median effective rate of 1.24%, while those in 29451 pay 1.24%. This spread — 0.00 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Charleston County. Understanding which part of Dewees Island you live in can make a meaningful difference to your annual tax bill.
Dewees Island homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the January 15, 2027 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Dewees Island, Charleston County, South Carolina
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, 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.
Below, you can compare Dewees Island's effective property tax rate to other cities in South Carolina and the median property tax rates in South Carolina and the U.S.
Property Tax Rates Across Dewees Island, Charleston County, South Carolina
Source: Ownwell
0.39%
0.90%
1.41%
Our median effective property tax rate (tax bill Ă· 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 Dewees Island Tax Rate
1.24%
Our median effective property tax rate (tax bill Ă· 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
0.66%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Dewees Island, Charleston County, South Carolina
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 29451 | 0.21% | 0.24% | 1.24% | 1.25% | 1.27% |
Source: Ownwell
Property Tax Assessment Values Across Dewees Island, Charleston County, South Carolina
When examining property taxes in Dewees Island, South Carolina, 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 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.
Assessment notices:
In Charleston County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the season.
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 Dewees Island.
For example, the median home price in Dewees Island is $805,000, with tax bills ranging significantly across the county. 29451 has the highest median home price at $805,000.
Property Tax Assessment Values Across Dewees Island, Charleston County, South Carolina
Source: Ownwell
$70,000
$980,775
$1,891,550
Median Dewees Island Market Value
$805,000
Median Charleston County Market Value
$330,300
Median South Carolina Market Value
$188,850
Median United States Market Value
$274,101
Property Tax Assessment Values Across Dewees Island, Charleston County, South Carolina
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 29451 | $448,000 | $560,000 | $805,000 | $1,234,000 | $1,625,000 |
Source: Ownwell
Property Tax Bills Across Dewees Island, Charleston County, South Carolina
Property tax bills in Dewees Island are based on the assessed value of a home, not its market price alone. Local tax rates are applied to that assessed value to determine the final bill, so changes in valuation can directly affect what homeowners owe. For a home with a median price of $805,000, the tax bill can vary widely depending on the assessment and any eligible exemptions.
How much do homeowners pay? The 25th percentile tax bill is $2,121, while the 75th percentile is $11,184 and the 90th percentile reaches $16,482. The median tax bill in ZIP code 29451 is $6,312, which is well above the national median property tax bill of $2,400 and the national median property tax rate of 1.02%.
What does this mean for homeowners? Higher assessed values can lead to larger tax bills, making it important to understand how local assessments work and whether a bill reflects a home’s true taxable value.
Property Tax Bills Across Dewees Island, Charleston County, South Carolina
Source: Ownwell
$637
$6,366
$12,094
Median Dewees Island Tax Bill
$6,312
Median Charleston County Tax Bill
$2,031
Median South Carolina Tax Bill
$1,227
Median United States Tax Bill
$3,209
Property Tax Bills Across Dewees Island, Charleston County, South Carolina
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 29451 | $1,449 | $2,121 | $6,312 | $11,184 | $16,482 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | September 13 |
Links | |
|---|---|
| Charleston Tax Assessor | |
| Website | www.charlestoncounty.org |