Relocation Guide · Sullivan’s Island, SC
Moving to Sullivan’s Island, SC
Sullivan’s Island is a small barrier-island town where floodplain rules, historic preservation, building permits, trees and land use can materially affect a property. Before buying or moving, understand the address—not just the view.
Floodplain
The Town says the entire island is within a Special Flood Hazard Area.
ZIP Code
Sullivan’s Island addresses use ZIP code 29482.
Water & Sewer
The Town manages local water billing and wastewater service.
Historic Review
Changes to a designated historic property require a Certificate of Appropriateness.
Before you buy
Four questions to answer before the closing table
Sullivan’s Island’s Building Department advises buyers and real-estate agents to contact the Building Official before purchasing a house or lot because floodplain and prior-improvement history can affect what you are allowed to do later.
What is the flood zone and elevation?
Ask for the property’s flood-zone designation and Elevation Certificate, then review the insurance and building implications before closing.
Is the property historically designated?
Verify historic status with the Town. Designated properties require a Certificate of Appropriateness for changes in addition to applicable building permits.
What work has already been permitted?
Prior improvements can matter under floodplain substantial-improvement rules. Pull permit history before assuming a future renovation is straightforward.
How will you use the property?
Primary residence, second home and rental use can have different tax and Town requirements. Confirm the rules for the use you actually intend.
Barrier-island ownership
The floodplain is not a footnote—it is part of owning here.
The Town describes Sullivan’s Island as a low-lying barrier island vulnerable to heavy rain and storm surge and says the entire island lies within a Special Flood Hazard Area. The current Flood Insurance Rate Map became effective January 29, 2021.
Historic properties
Know the preservation rules before planning the renovation.
Sullivan’s Island has locally designated historic properties and districts. The Town says any change to a designated historic property requires a Certificate of Appropriateness, and a Building Permit is also required for applicable construction work.
Do not rely only on a listing description or visible age of the house. The Town specifically asks buyers to verify historic status with Planning and Building before purchasing or beginning work.
Historic Preservation Information
Taxes + ownership
Primary residence and second-home tax treatment are not the same.
South Carolina applies a 4% assessment ratio to qualifying owner-occupied legal residences. Other real estate, including commercial and rental real estate, is generally assessed at 6%. The legal-residence rate is not automatic—you apply through the county assessor.
Your actual tax bill depends on assessed value, applicable millage and exemptions. Before closing, have Charleston County or your tax professional model the expected treatment for your intended use.
After you move in
The practical resident setup is mostly local and straightforward.
Several day-to-day services are handled directly by the Town or coordinated through Charleston County. These are worth setting up early.
Water & Sewer
The Town’s Water & Sewer Department manages local billing and wastewater service. The island’s primary water supply is currently purchased from Charleston Water System.
Garbage & Recycling
Household garbage is collected Tuesdays, with an additional Friday pickup from Memorial Day to Labor Day. Charleston County recycling is every other Wednesday.
Emergency Alerts
Everbridge carries emergency and public-safety notices; TOSI Talks is used for Town news, meetings, closures and service updates.
Schools
Sullivan’s Island Elementary School is physically located on the island and is part of Charleston County School District. Verify current attendance assignments directly with CCSD.
If you plan to renovate or rent
Make the use plan part of the property search.
Building and development work can require Town permits even when the project seems minor. The Town’s permit guidance includes repairs, remodeling, concrete, excavation, filling, clearing and fences—not only new construction.
Rental activity is regulated too. The Town’s current business-license information requires a business license, rental agreement and copy of the lease for long-term rentals, while vacation rentals are subject to separate zoning and licensing rules.
New resident checklist
A cleaner first month on Sullivan’s Island
Real estate directory
Find real-estate professionals serving Sullivan’s Island
Use the directory to compare local real-estate businesses and profiles. Directory inclusion is not an endorsement, and buyers should independently verify licensing, representation agreements, property facts and professional advice.
Make the move with better information
The right Sullivan’s Island property is partly about what you can do with it.
Use official Town records for flood, building and historic questions, then use the local directory to find real-estate and home-service professionals for the next step.