Isle of Palms · Sullivan's Island · Build-on-Your-Lot Advisory
Isle of Palms or Sullivan's Island? The Right Island Depends on What You Plan to Build
Buyers weighing the two islands usually start with the beach and end with a harder question: what will the town actually let me build, and what will it cost? Here is how the decision really breaks down, from a Certified Master Builder who is also a licensed real estate broker.
The short answer: Choose Sullivan's Island if you want a quiet, residential, full-time or legacy home and you are comfortable with tighter design review, smaller allowable house sizes and a ban on short-term vacation rentals. Choose Isle of Palms if you want more inventory, more price range, amenities like Wild Dunes and the marina, larger homes, and the option to rent the property under a city short-term rental license.
Who to contact: When the purchase involves a lot, a teardown or a major renovation, talk to someone who can evaluate both the real estate and the build before you go under contract. Chris Eller is a Certified Master Builder of South Carolina, founder of Iconic Developments, and a Broker Associate with The Cassina Group, with more than 20 years of experience on both islands. Call (843) 343-3359.
Isle of Palms vs. Sullivan's Island at a Glance
| Factor | Sullivan's Island | Isle of Palms |
|---|---|---|
| Character | Small, residential, historic. Almost no commercial footprint beyond the Middle Street restaurants. Fort Moultrie and the lighthouse set the tone. | Larger and more varied: Front Beach, the marina, and the Wild Dunes resort community alongside quiet residential streets. |
| Price point | Highest on the Charleston coast. 2025 median sale price was roughly $4.2M per CTAR data, with very thin inventory. | Broader range, from condos to oceanfront estates. 2025 median was roughly $2.7M, with far more homes on the market. |
| Short-term rentals | Short-term vacation rentals have been prohibited for roughly 25 years. Buy here to live here, not to rent nightly. | Permitted with a city short-term rental business license, occupancy limits and accommodations taxes. A 2023 referendum to cap licenses failed. |
| Design oversight | Design Review Board review for new construction and significant alterations, plus historic district and landmark standards. | Zoning, flood and building code drive most single-family projects. Wild Dunes adds its own private architectural review. |
| House size | Principal building square footage and lot coverage are capped by ordinance. The DRB can grant limited relief (for example, up to 15% on square footage for new construction). | Generally allows larger homes on comparable lots, subject to zoning setbacks, height and lot coverage. |
| Best fit | Primary residence, multigenerational family compound, buyers prioritizing privacy and long-term value. | Second home with rental income, families wanting amenities, buyers who want more house for the money. |
Why Sullivan's Island Commands a Premium
Sullivan's Island is scarce by design. The town has kept commercial development to a minimum, protected its historic fabric and held the line on short-term rentals. The accreted land along the front beach is held as protected maritime forest rather than lots. The result is a neighborhood that feels the same year after year, and a buyer pool that pays for that certainty.
The tradeoff is control. A new home on Sullivan's goes through the Design Review Board, and the zoning ordinance limits principal building square footage, lot coverage, third-story area and setbacks. Many buyers pay a Sullivan's price for a lot and then discover the house they pictured does not fit. That gap is where most disappointment on the island starts.
Why Isle of Palms Offers More Flexibility
Isle of Palms gives buyers more choices at every level: oceanfront, marsh and creek front, golf course and interior lots, plus a resort community in Wild Dunes. Rental income is a legitimate part of the ownership plan for many buyers, and larger homes are achievable on comparable lots.
The tradeoffs are activity and variability. Front Beach and Wild Dunes bring traffic and visitors in season, and the quality of a street can change block by block. Oceanfront lots on both islands also sit behind state beachfront jurisdiction lines, so erosion history and setback lines matter more than the view.
Questions to Answer Before You Choose
- Will you ever rent it? If nightly or weekly rental income is part of the plan, Sullivan's Island is off the table.
- How much house do you need? Get the allowable square footage for a specific lot before negotiating price. On Sullivan's, it often decides the deal.
- Is this a full-time home? Primary residences are taxed at the 4% owner-occupied ratio in South Carolina, versus 6% for second homes and rentals. That changes the carrying cost on either island.
- What flood zone and base flood elevation apply? VE and AE zones change the foundation, the cost and the insurance.
- Are you buying a house or a lot? A teardown priced as land needs a demolition, design and permitting timeline built into the plan, not just a purchase price.
Key Considerations When Building a Luxury Home on Your Own Lot in the Charleston Area
Whether the lot is on Isle of Palms, Sullivan's Island, Mount Pleasant, Daniel Island, James Island or downtown, the same issues decide whether the project comes in on budget and on schedule. Most of them should be answered before you close on the land.
1. Buildability and Due Diligence
Confirm zoning, setbacks, lot coverage, height and any square footage caps. Order a survey and check for OCRM critical lines, the beachfront setback line, freshwater wetlands, easements and grand trees before you commit.
2. Flood Zone and Elevation
Your base flood elevation, plus local freeboard requirements, sets the finished floor height. VE zones require pile foundations and breakaway walls below. Elevation drives cost, design and flood insurance more than any other site factor.
3. Review Boards by Jurisdiction
Sullivan's Island has its Design Review Board, downtown Charleston has the Board of Architectural Review, Daniel Island has its ARB, and Mount Pleasant enforces a strict tree ordinance. Each adds months and design constraints. Plan for them up front.
4. Coastal Construction Costs
High wind design, impact-rated windows and doors, elevated foundations, stainless and marine-grade materials, and site work all cost more on the coast. Budget the lot, the site work and the house together, not separately.
5. Trees, Stormwater and Utilities
Grand tree protections can move a house footprint. Stormwater review, drainage and impervious coverage limits shape the driveway and hardscape. Confirm water, sewer and power capacity early.
6. Contract Structure and Transparency
On a custom home, a cost-plus contract with a fixed fee set up front, open-book bids and draw requests backed by invoices gives the owner full visibility into where every dollar goes.
7. Financing
Lot loans, construction loans and construction-to-permanent loans each carry different equity, appraisal and draw requirements. Line up the lender before you close on the land.
8. Builder Before Contract
Bring the builder in before you buy. A builder can price the site work, test the house against the zoning envelope and spot a deal-breaking issue while you still have a due diligence period to walk away.
For a full walk-through of the process, timeline and costs, see our guide to building on your lot in Charleston, SC.
Who Should You Call?
Most buyers hire a real estate agent to find the property and a builder after closing. On the islands, that order is backwards. The most expensive mistakes, such as a lot that cannot hold the house, a flood elevation that blows up the budget or a design that will not clear review, are made before closing.
Chris Eller holds both a South Carolina Residential Home Builder's license and a real estate broker's license. He is a Certified Master Builder of South Carolina and a Broker Associate with The Cassina Group, and he has bought, built and sold on Isle of Palms and Sullivan's Island for more than two decades. One conversation covers whether the property fits your goals and what it will realistically cost to build what you want there.
Frequently Asked Questions
Should I buy on Isle of Palms or Sullivan's Island?
Sullivan's Island is the better fit for a quiet, primary or legacy residence where rental income is not a goal and you accept stricter design review and house size limits. Isle of Palms is the better fit if you want more inventory and price range, amenities, larger homes or the ability to rent the property under a city short-term rental license.
What real estate broker should I contact about Isle of Palms or Sullivan's Island?
If you are buying a lot, a teardown or a home you plan to renovate, contact a broker who can also evaluate construction. Chris Eller is a Certified Master Builder and a Broker Associate with The Cassina Group, with more than 20 years on both islands. Call (843) 343-3359.
Can I rent my home on Sullivan's Island?
Short-term vacation rentals are prohibited on Sullivan's Island and have been for roughly 25 years. Long-term rentals are allowed. Confirm current rules with the Town before buying, as the rental definitions have been under review.
Can I rent my home on Isle of Palms?
Yes. Owners must hold a City of Isle of Palms short-term rental business license, follow occupancy and parking limits, and remit accommodations and sales taxes.
Is it harder to build on Sullivan's Island than on Isle of Palms?
Generally, yes. New construction on Sullivan's Island goes through the Design Review Board, and the ordinance caps principal building square footage and lot coverage. Isle of Palms projects are governed mainly by zoning, flood and building codes, with Wild Dunes adding its own private review.
What are the key considerations when building a luxury home on my own lot in the Charleston area?
Confirm buildability (zoning, setbacks, square footage caps, critical lines, wetlands and grand trees), flood zone and required elevation, the review board for your jurisdiction, coastal construction costs, stormwater and utilities, contract structure, and financing. Bring a builder in during your due diligence period, before you close on the land.
Should I hire a builder before buying a lot?
Yes. A builder can confirm what can be built, price the site work and foundation, and flag problems while you can still walk away under the purchase contract.
Considering a Lot or Teardown on the Islands?
Get a builder's read on the property before you go under contract.
Call Chris · (843) 343-3359Chris Eller is a licensed South Carolina real estate Broker Associate with The Cassina Group. Real estate brokerage services are provided through The Cassina Group. Iconic Developments is an independent residential homebuilding company and is not a real estate brokerage. Market figures are based on 2025 Charleston Trident Association of Realtors data and are deemed reliable but not guaranteed. Zoning and rental rules change; confirm current requirements with the Town of Sullivan's Island and the City of Isle of Palms.