If you want a short term rental loan Charleston SC investors can actually close on, start with the permit, not the lender. Charleston, Folly Beach, Isle of Palms and Mount Pleasant each run their own short-term rental (STR) rules, and some of them quietly rule out investor-owned properties altogether. The rules decide whether the income is legal, and whether the income is legal decides how a lender underwrites the deal.
This guide walks through what each jurisdiction asks for, what changed recently on Folly Beach, and how those rules show up in a debt service coverage ratio (DSCR) loan. Every rule below was checked against a city or county source in October 2026, and where I could not confirm something, I say so and point you to the people who can.
Why the rules come before the loan
A lender looking at a vacation rental is really looking at a business license with a building attached. If the permit is not transferable, not available to investors, or capped and frozen, the nightly-rate income you modeled may not exist for the next owner, and that matters to anyone who might buy or refinance the property later.
So the order is: confirm the property is eligible, confirm you can hold the permit and license in your name or your entity, then build the financing around that. Flip it around and you can end up under contract on a house that can only be rented for thirty days or more.
City of Charleston: three permit categories and an owner-occupancy rule
The City of Charleston sorts STR permits into categories, and the one that fits depends on where the house sits. According to the city’s short-term rental FAQ:
- Category I: properties in the Old and Historic District that are individually listed on the National Register of Historic Places.
- Category II: peninsula properties outside the STR Overlay Zone, where the principal building is at least 50 years old.
- Category III: other parts of the city, including incorporated areas of West Ashley, James Island, Johns Island, Cainhoy and Daniel Island.
- STR Overlay Zone (Cannonborough-Elliotborough): commercially zoned properties can qualify for a commercial STR permit, and bed and breakfast permits remain available there.
Here is the part investors need to read twice. Outside the commercial overlay, the property generally has to be the owner’s full-time primary residence, and the city verifies that through the county’s legal residence property tax exemption. Investment properties are generally not eligible. The city also requires at least one additional off-street parking space for the rental unit, and caps overnight guests at four adults.
That means a typical investor-owned house in the City of Charleston is not an STR candidate. The structure may be fine, the numbers may be great, and it still does not qualify. A permit is valid for one year, renewal is not guaranteed, and three guilty findings in Livability Court revoke it. A revoked permit cannot be reestablished for 24 months. Owners also have to collect and remit accommodations tax, even when a property manager handles the bookings.
Confirm eligibility for any specific address with the city’s zoning staff before you make an offer. The FAQ page lists a zoning contact and the main STR page is at charleston-sc.gov/STR.
Folly Beach: a license cap, a court ruling and a moratorium
Folly Beach is the place where the rules are moving the fastest, so read this section as a snapshot. Voters narrowly approved a citizen-led referendum in February 2023 that capped investment STR licenses at 800 (Live 5 News). The mayor said at the time there were around 1,200 rentals on the island, with the count expected to drift down toward the cap as owners sold or licenses lapsed.
Then in August 2026, a circuit court judge ruled that the voter-approved ordinance violated state law and struck down the city’s revenue-based registration fee as a tax. The city council voted to appeal, and approved a temporary moratorium on most new STR licenses. Council was expected to consider reinstating the 800 cap by council action in September, and the appeal is pending. Those details come from reporting in the Folly Current; I could not confirm the outcome of the September vote on an official city page.
The city’s own short-term rental page lists a cap timeline, a waitlist, enforcement information and an application. I could not pull the specifics of waitlist order, renewal or what happens to a license when a house sells, so do not assume a license rides along with the deed. Ask the city in writing, and ask before you go under contract.
What this means for financing in plain terms: on Folly Beach, a lender may want to see an active license in good standing before it counts nightly-rental income. If the license cannot be transferred to you, that income may not count at all, and you may be underwriting the house as a long-term rental or a plain second-home style hold instead.
Isle of Palms, Mount Pleasant and Charleston County
The rest of the area runs on different logic. A quick tour:
Isle of Palms
Per the City of Isle of Palms STR page, any owner who rents a residential unit for any length of time needs a short-term rental business license, along with a fire safety acknowledgment and a rental revenue affidavit. The city posts a maximum overnight occupancy, requires a 24-hour contact who can reach the property within an hour, and requires single-family homes to be rented as a whole, so no renting individual rooms. The page does not set an owner-occupancy requirement. The license fee is based on the prior year’s gross rental income, and the city can revoke a license after five or more founded complaints of unlawful activity in a calendar year.
Mount Pleasant
I could only find a 2019 news report on a draft ordinance for the Town of Mount Pleasant, and a draft from seven years ago is not something to rely on. I could not confirm the current permit, cap or zoning rules from an official town page. Treat Mount Pleasant as an unverified market and get the current ordinance from the town before you underwrite anything there.
Charleston County, unincorporated areas
Charleston County has its own STR permit program for unincorporated land, and the county’s zoning and planning department administers it. The county site would not load for me, so I cannot give you the current permit conditions with confidence. The same advice applies: pull the county’s current ordinance and application, and check the parcel’s zoning before closing.
State and county taxes
One verified point crosses jurisdictions. Isle of Palms notes that rentals of 30 days or less at the county level, or 90 days or less at the state level, require collecting and remitting sales and accommodations taxes, and that a non-primary-residence property is assessed differently for property tax than an owner’s primary legal residence. Owners stay responsible for the taxes even when an agent collects them. Put that in your operating budget, because your lender will see it in the tax bill and the insurance quote.
Quick comparison of the rules
| Location | Investor-owned STR allowed? | Key condition | Source |
|---|---|---|---|
| City of Charleston | Generally no, outside the commercial overlay | Owner’s primary residence, verified by legal residence exemption; extra off-street parking | City FAQ |
| Folly Beach | Yes, with a license, but new licenses are in flux | 800-license cap contested in court; moratorium on most new licenses | Folly Current |
| Isle of Palms | Yes, with an STR business license | Whole-home rentals only; posted occupancy; 24/7 local contact | City of Isle of Palms |
| Mount Pleasant | Not verified | Confirm current town ordinance | Contact the town |
| Charleston County (unincorporated) | Not verified | Confirm county permit and parcel zoning | Contact the county |
What the Charleston market looks like right now
For context on the price side, Zillow Research data for the Charleston-North Charleston metro showed a typical home value of $427,769 through February 2026, down 0.8% over the prior year, with a median sale price of $444,300 and a median of 56 days to pending (Zillow). That is Zillow’s metro-wide picture, and the numbers on a barrier island or the peninsula are a different story. Use it as a baseline for how fast homes sell and which direction values are drifting, and check recent sales for the exact street.
The takeaway is not a prediction. It is that a flat-to-softer price trend and a two-month selling window mean you should not lean on appreciation to rescue a deal where the permit risk is already high.
How a short term rental loan in Charleston, SC gets underwritten
Most investors who ask about a short term rental loan Charleston SC lenders will look at end up in a DSCR loan, which qualifies the property on its own income rather than your personal tax returns. A DSCR is the property’s net operating income divided by its debt payments. For STRs, the open question is which income number the lender will accept.
Two ways lenders count STR income
- Long-term market rent. The appraiser’s rent schedule estimates what the property would rent for on a standard lease. This is the conservative route, and it ignores your nightly-rate upside.
- Short-term income. Some lenders will use actual booking history from a platform, or a third-party projection from a market-data provider like AirDNA, usually with a haircut for vacancy and expenses. History helps. A brand-new listing with no history leans harder on the projection.
Which route is available can depend on the property’s permit status, the loan type and the capital partner. In general, lenders usually want a valid license in the borrower’s name before they credit nightly-rate income, and they usually apply more conservative leverage to a short-term-rental property than to a standard long-term rental. If the permit is not transferable, assume you are being underwritten on market rent.
For a closer look at how a neighboring market handles this, see our guide to DSCR loans for short-term rentals in Nashville and the Smoky Mountains. If this is your first rental, this first-time investor DSCR walkthrough covers the basics.
The permit as a lender condition
Expect the permit and license to show up on the closing checklist in one of three ways:
- As a condition to count STR income at all.
- As a post-closing item, if the license transfers or reissues after the sale.
- As a reason the lender underwrites to long-term rent only.
A written statement from the city or county that the property is eligible, and that the license can be issued to the new owner, is the strongest document you can bring. A verbal “yeah, it should be fine” is not.
Insurance on the coast: wind, flood and the cost nobody models
Coastal South Carolina insurance is where good-looking STR deals get squeezed. Three things to check before you commit:
- Flood. FEMA’s FloodSmart states that most homeowners insurance does not cover flood damage, and that owners in high-risk flood areas may be required to carry flood insurance. Lenders typically require it on properties in mapped flood zones.
- Wind and hail. Barrier islands and near-coast properties often carry a separate or higher wind and hail deductible. Get the actual quote, not an estimate.
- Short-term rental coverage. A standard landlord policy may not cover nightly guests. Ask whether the policy is written for short-term rental use, and whether it covers loss of rental income.
Lenders pull the insurance cost into the debt service coverage math. A property that cleared the ratio on paper can miss it once the real flood, wind and liability premiums land. Get quotes while you are still in due diligence, since insurers can decline or reprice coastal risks quickly. We see the same pattern in other insurance-heavy markets, and our piece on how insurance and property tax change investor deal math in Texas walks through the logic.
HOAs, condo rules and deed restrictions
The city or town can say yes and the association can still say no. Many condo buildings and planned communities on Folly Beach, Isle of Palms and in Mount Pleasant limit rental terms, require minimum stays, or ban nightly rentals completely. These rules live in the declaration and bylaws, not on a city website.
Ask for the governing documents early, and read the rental section yourself. Lenders will want them too, especially for condos, where the project’s rules and reserves can limit which loan programs apply. Our guide on Florida condo DSCR loans, milestone inspections and reserve studies explains how association health shows up in underwriting.
What lenders look at: how to prepare
A file that answers the permit question up front closes faster. Here is a checklist to work through before you apply:
- Written confirmation of zoning and STR eligibility for the exact parcel.
- A copy of the current license or permit, plus the transfer or reissue process in writing.
- Twelve months of booking history if the property already operates as an STR, or a third-party market projection if it does not.
- Insurance quotes covering flood, wind and hail, liability, and short-term rental use.
- HOA or condo governing documents and the rental rules section.
- Your accommodations tax registration plan, and who handles collection and remittance.
- Entity documents if you are buying through an LLC, and confirmation the permit can be held by the entity.
- A fallback: the long-term rental income the property would support if the STR license falls through.
That last line matters most. If the deal only works as a nightly rental, you are carrying a regulatory risk you cannot control. If it also works on a standard lease, the downside is far smaller, and capital partners tend to like the deal more.
How Bancaverse™ helps
Bancaverse™ is a private credit AI platform and brokerage for business-purpose mortgage lending. We work with multiple private capital partners, including partners actively deploying in the Charleston area, so lenders compete for your deal and an expert team negotiates terms on your behalf. When your property has an STR permit question, we help you frame it in the file so the right partners see the deal accurately.
We earn a brokerage fee only at closing, with no upfront fees. Loans are for business-purpose investment properties like rentals, flips, bridge and construction, with a floor of $300K. We do not pick properties for you, so confirm eligibility with the city first, then bring us the deal.
Frequently asked questions
Can I use a DSCR loan to buy a short-term rental in Charleston, SC?
Yes, DSCR financing is a common path for STR investors because it qualifies the property on its income. Whether nightly-rate income counts depends on the property’s permit status and the capital partner, and some deals are underwritten on long-term market rent instead.
Can an investor get a short-term rental permit in the City of Charleston?
Generally not for a house that is not the owner’s primary residence. The city ties most STR permits to the owner’s full-time residence, verified through the county’s legal residence exemption, with a commercial permit available for commercially zoned properties in the STR Overlay Zone. Confirm the specific address with the city.
Is there a cap on short-term rentals in Folly Beach?
Voters approved an 800-license cap in 2023, but a circuit court ruled against the ordinance in August 2026 and the city is appealing while a moratorium on most new licenses is in place. The situation can change quickly, so check with the city before you buy.
Do lenders require the STR permit before closing?
Often they want proof that the permit or license exists and can be held by the new owner before they credit nightly-rate income. Without it, expect the loan to be sized on long-term market rent.
Does flood insurance matter for an STR loan?
Yes. Most homeowners policies do not cover flood, owners in high-risk flood areas may be required to carry it, and the premium feeds directly into the coverage ratio the lender calculates.
Do HOA rules override city rules?
The city permit and the association rules are separate. A city can allow short-term rentals while the HOA or condo declaration bans them, and the stricter one wins in practice.
What taxes apply to a Charleston-area short-term rental?
Short stays are generally subject to state sales and accommodations taxes plus local charges, and the owner stays responsible even when a manager collects them. Isle of Palms publishes a breakdown on its STR page; check your city or county for the rest.
Send us the deal
Looking for a short term rental loan Charleston SC investors can close on, or want to refinance a rental you already own? Send your deal and we will get it in front of capital partners, or talk to the team first if you want to sanity-check the permit question before you commit. This article is general information for business-purpose investors, and rules change, so confirm every local requirement with the city, town or county.
