Charleston Area STR Market Report: Where the Numbers Still Work in 2026

Thomas Garner
5 days ago
10 min read

Updated: 5 days ago

Charleston's short-term rental market is not a single market — it is a patchwork of jurisdictions where regulation matters more than ADR in determining where capital and effort still work. AirROI, AirDNA, and Airbtics disagree on occupancy and revenue because they measure different footprints and use different methodologies; this report reconciles these ranges and ranks sub-markets by openness versus yield.

Explore Charleston reported roughly 7.9 million visitors and $14.35 billion economic impact in 2025 — growth driven by higher per-trip spend ($1,212 per adult), not volume explosions. Directional STR figures below — re-verify all metrics at publish.

Metro Headlines — Supply Growth, ADR Ladder, and the Legal Overlay

Charleston city on AirROI trailing-twelve-month data (Jun 2025–May 2026) shows approximately 1,920 listings, an average occupancy of 51.2%, a $427 ADR, $67,858 in average annual revenue, with +9.1% revenue growth and +12.7% supply growth. Peninsula investor whole-home STRs are effectively illegal under owner-occupancy and four-adult cap rules — headline revenue reflects a broader city footprint than legal peninsula inventory.

The ADR ladder on AirROI runs Sullivan's $914, IOP's $768, Kiawah's $651, Folly's $610, Johns's $449, Charleston's $427, Mount Pleasant's $326, and James's $252. Occupancy ladder, on average: Mount Pleasant and James 53.3%, Charleston 51.2%, Folly 45.7%, Sullivan's 42.7%, IOP 41.7%, Johns 39.7%, Seabrook 34.4%, Kiawah 33.2%. Beaches trade occupancy for ADR; mainland trades ADR for year-round occupancy.

Platform pages show numbers without legal context. Operators should confirm jurisdiction before underwriting, match seasonality strategy to city spring versus beach summer peaks, treat Johns Island and IOP supply growth as yield-dilution risks, and price capped markets (Folly, Mount Pleasant) for scarcity durability rather than trough-discounting peak weeks.

Sub-Market Scorecard — Where Rules Let You Compete

Regulation determines whether revenue tables are actionable — this scorecard pairs legal posture with AirROI revenue notes and new-entrant feasibility.

*Table 1 — Charleston-area sub-market regulatory and revenue scorecard (AirROI 2026 vintage).*

Sub-market	Regulatory posture	Typical guest	Revenue note (AirROI)	New entrant feasibility
Peninsula	Owner-occupied, 4 adults, Cat 1/2/3	Couples, heritage, food	Premium ADR, tiny legal supply	Closed to investors
Folly Beach	800 ISTR cap, waitlist	Surf, dogs, families	~$86K–$109K range	Waitlist / buy-with-license
Isle of Palms	No cap, business license	Family weeks, golf	~$87K–$132K range	Open but competitive
Mount Pleasant	400 cap, 2026 renewals closed	Families, events	~$55K	Waitlist
Sullivan's Island	28-night minimum	Mid-term only	Grandfathered only	Closed
Kiawah	Zone density, 30-day patterns	Golf luxury	~$54K	License + KICA
Seabrook	557+110 permit caps	Quiet luxury	~$36K	Permit-limited
Johns Island (county)	72/144 day caps	Weddings, gateway	~$44K	Day-cap ceiling
North Charleston	60/district (~600)	Value urban	~$36K–$47K	District-dependent

Peninsula headline ADR looks attractive until you read the owner-occupancy requirement. Sullivan's $914 ADR is a case of grandfathered scarcity, not open opportunity. Johns Island and North Charleston require day-cap and district-level due diligence before any revenue projection.

Demand Context — Feeders, Seasonality Split, and 2026 Watch Items

Feeder markets include Charlotte, Atlanta, NYC, DC, Raleigh, and Florida metros — drive markets supply core Carolinas and Atlanta demand; CHS record 6.34 million passengers (2025) supports fly-in premium demand for peninsula heritage trips and island family weeks.

Seasonality splits sharply by jurisdiction. Charleston city revenue peaks in the spring (March–May); beaches peak in the summer (June–August); January is the universal trough across every sub-market. Mount Pleasant is the flattest year-round market with roughly 45% low-season occupancy. Hosts should not copy peninsula event calendars on island inventory or beach summer minimums on city spring peaks.

2026 watch items include Folly 800-cap ordinance review; Mount Pleasant renewal halt; Charleston County enforcement loophole closure; SC legislative activity (Bill 442 cited in research — re-verify at publish). Beach renourishment fees are a rising cost-of-doing-business signal across IOP and Folly that operators should model into net yield, not guest-facing ADR alone.

Data Methodology — Why Vendors Disagree and How to Read Each

AirROI serves as the primary source for this report, using trailing 12-month windows (Jun 2025–May 2026 cited), sub-market geographic boundaries, and average occupancy and ADR. AirROI tends to be conservative in its revenue averages because it includes newer, underperforming listings in the market-wide calculation.

AirDNA MarketMinder often shows higher medians for beach sub-markets — different active-listing filters and revenue estimation models make it useful for comp sets, but dangerous for legal-overlay underwriting alone. Airbtics frequently cites $105K–$132K medians on Folly and IOP versus AirROI $86K averages — median versus mean divergence in skewed luxury tails.

Explore Charleston tourism data (2025): 7.9 million visitors, $14.35 billion in impact, and $1,212 per adult per trip in spend — demand is growing through spend per trip, not just headcount. STR revenue growth (+9.1% city, +26.8% IOP) tracks tourism spend growth, not unlimited new visitor volume. Cite ranges across vendors; never blend methodologies into one official number.

Yield Compression Signals — Supply Growth vs. Revenue Growth

When supply growth outpaces revenue growth, RevPAR compresses even in strong demand markets. This table flags sub-markets where differentiation spend is mandatory, not optional.

*Table 2 — Supply growth versus revenue growth signals (AirROI YoY, 2026 vintage).*

Sub-market	Supply YoY	Revenue YoY	Signal
Johns Island	+127.9%	mixed	Red flag — differentiation mandatory
IOP	+30.5%	+26.8%	Yellow — still absorbing, competition rising
Seabrook	+25.7%	+13.1%	Yellow/red — quiet luxury oversupply risk
Folly	+18.9%	+8.9%	Green/yellow — cap limits supply; revenue still rising
Charleston city	+12.7%	+9.1%	Green — owner-occ brake limits investor flood

Operators in yellow and red cells should budget for marketing spend, a photo refresh, and amenity upgrades — not passive reliance on the calendar. Johns Island's +127.9% supply growth with mixed revenue response is the clearest yield-compression warning in the metro. IOP still absorbs supply, but independent hosts face rising photo and amenity bars daily.

RevPAR Mental Math — Occupancy × ADR Tells the Real Story

RevPAR proxy equals ADR multiplied by occupancy rate — the figure that tells you what a booked night actually earns on average across the calendar.

IOP: $768 × 41.7% = roughly $320 effective RevPAR per night. Folly: $610 × 45.7% = roughly $279. Kiawah: $651 × 33.2% = roughly $216 — resort seasonality, not weak demand. Mount Pleasant: $326 × 53.3% = roughly $174 — year-round floor.

Kiawah's lower RevPAR reflects luxury minimum-stay and golf-season concentration, not market failure. Hosts should optimize for May–July ADR peaks and spring and fall golf shoulders, not peak-beach occupancy parity with Folly. Sullivan's $914 ADR with 42.7% occupancy produces strong RevPAR on grandfathered inventory — but that math is irrelevant to new nightly STR entrants blocked by the 28-night minimum.

2026 Regulatory Watch List — Confirmed Items

Five regulatory items shape Charleston-area underwriting in 2026 and deserve monitoring through the publish date.

Folly's 800 cap was upheld in COA-2026-UP-075 (March 2026), with city ordinance review ongoing. Mount Pleasant renewal halt continues with waitlist via str@tompsc.com — functionally closed to new entrants for 2026. North Charleston's 60-per-district cap was adopted in February 2025; districts 5, 6, 8, and 10 remain blocked.

Charleston County enforcement of day-cap violations on James and Johns Islands drew 2026 news coverage — operators on the county inventory should verify the 72-day and 144-day Extended Home Rental caps before marketing. Seabrook's May 2025 regime established 557+110 permit caps, activity logs, and April 30 renewal deadlines that continue maturing through 2026.

CHS Airport, Drive-Market Split, and Professional Management Share

Charleston International (CHS) handled 6.34 million passengers in 2025 — record throughput supporting fly-in premium demand. Drive markets (Charlotte, Atlanta, Raleigh, Columbia, Greenville) supply weekend and week-long bookings with 3–5 hour access assumptions. Hosts should merchandise feeder market in copy: Atlanta families book IOP July weeks; Charlotte couples book peninsula spring weekends; Northeast golf groups book Kiawah with 99-day lead times.

Professional management share varies sharply by sub-market and sets the quality bar independents must match. Kiawah runs at 84% pro-managed; Seabrook at 77.1%; James Island at 84.7% Superhost share. Folly is mixed — licensed scarcity offsets some pressure. Independents in high-pro-management markets must budget for an annual photo refresh and dynamic pricing tools, not static calendars.

January Trough, Cash Reserves, and the Action Matrix

Every sub-market troughs in January — city roughly $5,024 monthly revenue, Folly roughly $4,353, IOP roughly $4,784 on AirROI. Operators without a shoulder-season strategy and event-calendar pricing should model two lean months of mortgage and utility carry per year, especially island investors with higher debt service.

If you hold legal inventory: match seasonality tactics to your jurisdiction (city spring versus beach summer), refresh photos if supply growth in your sub-market exceeds revenue growth, and display permit numbers in all marketing. If you are buying, lead with jurisdiction due diligence — revenue tables are meaningless on Sullivan's nightly STR purchases or peninsula non-owner-occupied investments.

If you are capped (Folly ISTR, Mount Pleasant permit): price for scarcity durability in peak months; do not trough-discount your way out of July premium weeks. Generic "Southeast guests" copy misses filterable search intent — name feeder markets and event calendars in listing architecture.

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Frequently Asked Questions

How much do Airbnbs make in Charleston? Range roughly $59K–$74K city average depending on vendor; beach islands run $86K–$132K+ on IOP and Folly. Legal status and product type matter more than metro averages — peninsula owner-occupied units, capped Folly ISTRs, and IOP oceanfront compounds sit in different economic worlds despite sharing a metro label. Always pair the revenue range with the permit status before underwriting.

Why do AirDNA and AirROI disagree? Different market boundaries, active-versus-available listing definitions, and average-versus-median occupancy methodologies produce divergent figures. AirDNA tends higher on beach medians; AirROI includes newer underperformers in market-wide averages. Cite ranges across vendors; do not blend methodologies into one official number for lender conversations or acquisition models.

What is the best Charleston sub-market for STR? Depends entirely on license access: Isle of Palms for open whole-home investment; Folly and Mount Pleasant for capped scarcity if you hold permits; peninsula only for owner-occupants meeting Category 1/2/3 criteria. Sullivan's Island is closed to new nightly entrants. Johns Island works within county day caps for wedding and estate segments. There is no universal best — only best fit for your legal status and capital profile.

Is Charleston STR supply saturated? Supply grew +12.7% (city) to +30.5% (IOP) year-over-year, while revenue still rose — demand is absorbing supply in premium tiers. Yield compression risk is real on Johns Island (+127.9% supply) and rising on Seabrook (+25.7% supply versus +13.1% revenue). Capped markets (Folly, Mount Pleasant) face supply constraints that uncapped IOP does not.

When is peak season in Charleston? City of Charleston peaks in spring (March–May) around Spoleto, Wine + Food, and wedding season. Beach islands peak in summer (June–August), with July being the highest on Folly and IOP. January is the softest everywhere — model two lean months of carry costs. Mount Pleasant is the exception with the flattest year-round curve at roughly 45% low-season occupancy.

What changed in Charleston STR regulation in 2026? Folly's 800-license cap was upheld by the SC Court of Appeals (COA-2026-UP-075, March 2026) with ordinance review ongoing. Mount Pleasant renewals remain closed with an active waitlist via str@tompsc.com. North Charleston's 60-per-district cap (adopted in February 2025) continues to shape buyer geography. Charleston County day-cap enforcement on James and Johns islands intensified.

Where can new Charleston-area investors still buy legally? Isle of Palms (no numeric cap, business license required), portions of Johns Island within county 72-day and 144-day caps, and owner-occupied City of Charleston categories — not non-resident peninsula investment or Sullivan's Island nightly stays. North Charleston depends on district-level availability under the 60-per-district cap. Folly and Mount Pleasant require an existing license or a waitlist position.

Which Charleston sub-market has the best RevPAR for licensed hosts? Folly and IOP beachfront products typically lead on rate-times-occupancy for legal inventory — IOP roughly $320 effective RevPAR, Folly roughly $279. Peninsula owner-occupied units trade lower volume for premium event-season ADR when Category 1/2 criteria are met. Kiawah's roughly $216 RevPAR reflects resort seasonality, not failure — optimize for golf-season ADR peaks, not beach-parity occupancy.

About the Authors

Crest & Cove Creative is a Southeast-focused short-term rental marketing agency founded by Thomas Garner and Jacob Mishalanie. We build direct-booking brands, listing-optimization systems, and market-specific content strategies for independent STR operators across the Gulf Coast, Appalachian Mountains, Coastal Georgia, the Carolinas, Virginia, and the Southeast lake country.