Hilton Head Vacation Rental Investment: Three STR Data Platforms, Three Different Answers, and What the Town's Own Numbers Don't Resolve Either

Three Platforms, Three Different Pictures of the Same Market

Here are the three most-cited third-party STR data platforms for Hilton Head Island, reported exactly as each one presents its own numbers, labeled by source and pull date, with no averaging or blending performed. Rabbu, as of April 27, 2026, reports 1,567 active listings, an average daily rate (ADR) of $269, 34% occupancy, and average annual revenue of $54,487. AirROI, for the same market, reports 4,740 active listings, a $437 ADR, 36.5% occupancy, average annual revenue of $36,451, and RevPAR (revenue per available rental, a metric that blends rate and occupancy into one number) of $162. AirDNA reports 10,937 active listings - a figure it says spans Airbnb, Vrbo, and Booking.com combined, not Airbnb alone - a $483 ADR, 58% occupancy, average annual revenue of roughly $45,500, and RevPAR of $288.

Look at those three listing counts together and the gap is not a minor discrepancy: 1,567 to 10,937 is nearly a 7x range for what should be a countable, verifiable fact about the same physical island at roughly the same point in time. Occupancy tells the same story from a different angle - 34% at the low end (Rabbu) to 58% at the high end (AirDNA), a spread of 24 percentage points on a metric that directly drives revenue projections. None of the three platforms publishes a methodology that explains why its count or its occupancy figure lands where it does relative to the other two - whether that's differences in which listing types get counted (whole-home only versus shared rooms, active versus dormant listings, single-platform versus multi-platform scraping), differences in the trailing period each figure covers, or something else entirely. This page is not going to average these three numbers into one falsely precise "consensus" figure, because averaging three numbers that disagree by a factor of seven does not produce a meaningful answer - it produces a fourth number nobody can defend. The honest takeaway is that the range itself, not any single point inside it, is the real data point a buyer should be working with.

Cross-Checking Against the Town's Own Permit Registry - Which Doesn't Match Either

If the three data platforms disagreed with each other but one of them lined up with the Town of Hilton Head Island's own official registration count, that would at least offer a tiebreaker. It doesn't work out that way. The Town's own STR permit registry counted 7,112 registered short-term rental permits as of a late-January reporting date - and that figure sits between Rabbu's 1,567 and AirROI's 4,740 on one side and AirDNA's 10,937 on the other, without cleanly matching any of them. A registered permit and an "active listing" on a booking platform are not strictly the same thing - a permitted property could sit unlisted for a season, and a listing could theoretically operate without a current permit - but a gap this size, in both directions, is still worth naming plainly rather than treating any one number as the settled truth.

The Town's own enforcement data adds a further wrinkle: roughly one in three registered permit holders were reported behind on their permit fees as of that same reporting period, and Hilton Head's own mayor was quoted by the Post and Courier describing STR enforcement on the island as the "wild wild west." That is not third-party speculation - that's the Town's own elected leadership describing the state of its own regulatory data. Put together, the honest picture is this: the Town's registry, which ought to be the most authoritative count available, is itself in a state of acknowledged enforcement disarray, behind on collections from a third of its own registrants, and still doesn't reconcile against any of the three commercial data platforms. Anyone telling you they know the precise number of active Hilton Head short-term rentals, with confidence, is telling you more than the available data actually supports.

What It Actually Costs to Operate Legally: Permit Fees and the New Rules Effective May 1, 2026

Whatever the true listing count turns out to be, the cost and requirements of operating a short-term rental legally on Hilton Head are concrete and directly affect investment returns, so they belong on this page in full. A short-term rental requires a permit in addition to a standard business license, at $150 per bedroom per year. That fee is non-refundable and non-transferable, runs on an annual term from May 1 through April 30, and is renewed through the Town's GovOS online permitting system.

A new set of rules takes effect May 1, 2026, and materially raises the compliance bar for owners. The permit number must appear in all advertising for the property - on the listing itself, not just on file with the Town. The application must be made in an individual person's name, not a corporate entity, which is a meaningful change for owners who currently hold rental property through an LLC or similar structure and will need to work out how that requirement applies to their specific situation. Written authorization from the property's HOA or POA is now required as part of the application. Every bedroom counted toward the per-bedroom fee must actually meet building-code standards for sleeping purposes - a den or converted space advertised as a bedroom online has to hold up to that code standard, not just to marketing copy. A maximum of six vehicles is allowed in the driveway at the property. Properties of 3,600 square feet or larger must have monitored fire-alarm and smoke-detection systems installed. And propane grills at the property require 60-minute automatic shutoff valves, plus detection alarms where applicable.

Enforcement carries escalating fines: $250 for a first offense, $500 for a second, and $1,000 for a third or subsequent offense, according to Avalara/MyLodgeTax's coverage of the 2026 rules. That figure comes with an honest caveat: it could not be independently confirmed against the actual Municode ordinance text for Hilton Head Island, which was not accessible during this research. An earlier Post and Courier article from February 2025 cited a different fine schedule - $500 for a first offense and $1,000 thereafter - which appears to reflect an earlier draft stage of the ordinance and is likely superseded by the time the 2026 rules take effect, but "likely superseded" is not the same as confirmed. Anyone budgeting for compliance risk on a specific property should verify the current, final fine schedule directly with the Town rather than relying on either secondhand figure.

The Plantation Layer: A Second Rulebook You Have to Check Separately

Roughly 70% of Hilton Head Island, including most of its tourist-facing real estate, sits inside one of eleven named gated communities locally called "plantations" - Hilton Head Plantation, Palmetto Hall Plantation, Port Royal, Palmetto Dunes Plantation, Indigo Run Plantation, Windmill Harbour Plantation, Spanish Wells Plantation, Wexford Plantation, Long Cove Plantation, Shipyard Plantation, and Sea Pines Plantation. Everything above in this page - the $150-per-bedroom fee, the May 2026 rule changes, the fine schedule - describes Town of Hilton Head Island rules that apply island-wide. It does not describe, and cannot substitute for, whatever separate rules the specific plantation's property owners' association (POA) may impose on top of the Town's requirements.

Many of these communities have their own STR restrictions, written into their own covenants and enforced by their own boards, entirely apart from what the Town permits or prohibits - and a property that is fully compliant with the Town's registry and fee schedule can still be barred from short-term rental use, or subject to additional restrictions, fees, or approval processes, under its own POA's rules. This research did not find - and no source consulted turned up - a reliable plantation-by-plantation breakdown of which of the eleven communities currently restrict or prohibit short-term rentals and which don't; that information changes as boards revisit their own covenants and was not something this page could responsibly fabricate. The practical takeaway for a buyer: before assuming any specific Hilton Head property can legally operate as a short-term rental, confirm that directly with the property's specific POA, in addition to the Town's own permit office. A "yes" from the Town does not guarantee a "yes" from the plantation.

The Price Baseline: What a Hilton Head Property Actually Costs to Buy

Any return-on-investment calculation starts with an accurate purchase-price baseline, and here too, two legitimate but different metrics are both worth citing rather than picking one. Zillow's ZHVI (Zillow Home Value Index), a smoothed, seasonally adjusted measure of typical home value across the market, puts Hilton Head Island at $787,147, up 2.7% year over year, with data through May 31, 2026. Houzeo's figure, drawn from actual closed transactions, puts the median sale price at $801,250 as of March 2026, flat (0% year over year), with homes selling at 95.9% of asking price after an average 54 days on market, and a 2-4% appreciation forecast for 2026.

These are not competing numbers describing the same thing - ZHVI is an index-based estimate of value across the entire housing stock, while median sale price reflects only the transactions that actually closed in a given window, which skews toward whatever mix of homes happened to sell. Both are legitimate, both are cited here with their source and date, and a buyer modeling ROI should understand which one they're using and why: ZHVI is closer to "what is a typical home here worth," while median sale price is closer to "what did homes that actually sold recently go for."

The Honest Bottom Line: Don't Trust Anyone's Single Expected-Income Number

Put the whole picture together and the pattern is unmistakable: three commercial STR data platforms disagree with each other by nearly 7x on listing counts and by 24 percentage points on occupancy; the Town's own official permit registry doesn't cleanly reconcile with any of the three; the Town's own mayor describes enforcement of that registry as the "wild wild west"; and a real, separate layer of plantation-level POA restrictions can override Town-level permission entirely on a property-by-property basis. Given that scale of disagreement across every available data source - commercial and governmental alike - anyone who hands you a single, confident "expected STR income" number for a Hilton Head property is almost certainly oversimplifying, whether they realize it or not.

The responsible path for a buyer evaluating a specific property is not to pick whichever of Rabbu's, AirROI's, or AirDNA's market-wide averages sounds most flattering and plug it into a spreadsheet. It's to pull actual, current, comparable-property performance data for the specific type of home and location you're considering - either through a licensed local property manager who can show trailing performance for similar properties they actually manage, or by requesting real trailing-twelve-month revenue and occupancy data on the specific address you're evaluating, if it's already operating as a rental. A market-wide average, from any one of these three platforms, is not a substitute for that - and given how far apart the three platforms already are from each other, treating any single one of them as gospel for your specific deal is a real, avoidable risk. Confirm the Town permit status, the specific plantation's POA rules, and actual comparable performance data before making any purchase or income projection. Nothing on this page is investment, legal, or financial advice.