Koh Rong and Cambodia’s Islands: A Coastal Development Guide

Cambodia’s islands are the most seductive property pitch in the country and the one that punishes naïveté hardest. Powder-sand beaches, a bungalow resort, a bar on the water — the dream sells itself. Underneath it sits the toughest set of property realities Cambodia offers: land you usually can’t get clean title to, infrastructure you have to build and run yourself, an economy that closes for the monsoon, and an exit that may not exist. This guide is deliberately unromantic.

It complements our Sihanoukville guide — the mainland gateway the islands depend on — and the Kampot and Kep coastal overview. Islands are their own category, riskier than either. Citations are marked [S-NNN]; the source list is at the end.

Orient yourself

The islands sit off Sihanoukville, reached by ferry from the mainland (30–45 minutes to Koh Rong) [S-108]. Two dominate:

• Koh Rong — at ~78 square kilometres Cambodia’s second-largest island [S-108]; the larger, livelier of the pair, a backpacker hub slowly adding boutique and mid-market stays. It has been under a Royal Group 99-year development lease since 2008, which has so far produced a $35 million road network and — after years of slow progress — a ~$300 million “eco-tourism” international airport project (planned at 4C category) that began moving in 2024 [S-108]. In mid-2026 the momentum stepped up: the province reviewed a $39 million project pipeline, set a formal eco-tourism / high-end / wellness vision, and restated an undersea power-transmission plan — tracked in our Koh Rong Development Watch, which explains why none of it changes the diligence below.
• Koh Rong Sanloem — quieter, more boutique and barefoot-luxury in feel, and the island whose recent history every buyer should study before going near either (below).

Around them are smaller islands at various stages of tourism development, several tied up in large resort concessions. Across all of them the economy is purely tourism, and tourism here is downstream of Sihanoukville’s fortunes — when the gateway stumbled through its casino boom and bust, the islands felt it.

The title reality — read this first

This is the part the beach photos never mention. On the islands, ordinary foreign-ownership limits are compounded by a harder problem: much island land is untitled, soft-title, or held under state tourism concessions. You are often not looking at clean, registrable freehold at all.

In practice that means island “ownership” is usually one of:

• a lease or sub-lease of concession or soft-title land,
• buying an operating business (a resort/bungalow venture) whose underlying land right is a lease or concession, not owned title, or
• a unit in a developer’s master-planned concession — which is a bet on that developer and that concession holding, not a land purchase.

The standard foreign land-holding structures still apply, but the foundation underneath them is shakier than on the mainland. Verifying exactly what right is being sold, who granted it, and for how long is the entire deal. Anyone selling you “island land” without a clear, documented, durable legal right is selling you a problem.

And this is not theoretical. Koh Rong Sanloem demonstrated it in 2023: two 99-year concessions signed back in 2008 — Emario Shonan Marine (1,124 ha) and Koh Rong Sanloem Island Resort (1,120 ha) — turned out to cover nearly the entire 2,400-hectare island, and when the concession-holders moved, provincial authorities ordered businesses and resorts off with weeks of notice. Landowners got compensation; operators renting their plots largely did not — one resort that had invested $200,000 settled for $10,000 under pressure, while others with $300,000–400,000 sunk refused to leave without settlement [S-109]. Every “beach bar on a handshake lease” on these islands sits downstream of paper like that. Read the Sanloem episode as the base case for what an undocumented or junior right is worth when the senior concession asserts itself.

The infrastructure you have to provide

Mainland services largely don’t reach the islands. A property here typically has to generate its own:

• Power — limited or no grid; solar arrays and diesel generators are the norm, with real capital and running cost.
• Fresh water — scarce; rainwater capture, wells, and desalination are part of operating a property, not optional extras.
• Waste and sewage — your responsibility, with genuine environmental sensitivity on small islands.
• Connectivity — improving via mobile networks, workable but not guaranteed.
• Medical — none for anything serious; an emergency means a boat to the mainland and onward. This shapes who can realistically live or operate here.

Underwrite the off-grid capex and the ongoing cost of running your own utilities; it is frequently what turns an attractive headline yield into a thin real one.

Seasonality and the tourism cycle

The monsoon materially shuts down island tourism for months — ferries get rough, occupancy collapses, some operators close entirely for the wet season. Any revenue case built on high-season numbers is fiction. Model a full year, including the dead months, and remember the whole island economy is a leveraged bet on Cambodian coastal tourism recovering and holding — the same single-driver risk as Siem Reap, with worse liquidity.

It’s a business, not a land play

On the islands, more than anywhere else in Cambodia, you are almost never buying passive titled real estate. You are buying an operating hospitality business sitting on a lease or concession. There is essentially no strata-condo market to buy into in your own name. That reframes everything: vet it as a business (occupancy across a full year, cost of off-grid operations, staffing, the durability of the land right) and apply the developer-vetting lens to any concession-based master plan, exactly as you would a mainland off-plan project. Underwrite the hospitality numbers honestly — our rental-yields guide on the gap between gross and net applies with extra force once you add generators and boats.

Who this suits — and who it doesn’t

• Suits: hands-on hospitality operators with capital, patience, and appetite for off-grid complexity and a long, illiquid hold; people buying a life and a business, not a passive asset.
• Doesn’t: anyone wanting titled freehold, passive income, a clean exit, reliable services, or a low-risk store of value. For that, the islands are the wrong place in the wrong country.

The reliable island story is a well-run business on a documented, durable lease, operated by someone who wants to be there. The ruinous island story is paying land prices for an undocumented right to a beach. Buy the first, never the second.

Diligence specific to the islands

On top of every standard Cambodian check:

• Establish the exact land right — title vs soft title vs lease vs concession — and who has authority to grant it, in writing, with duration and renewal terms.
• Cost the off-grid infrastructure — power, water, waste — as capex and ongoing opex, and build it into the return.
• Model a full-year occupancy including the monsoon shutdown, not a high-season snapshot.
• Treat concessions and master plans as developer bets, with the diligence that implies, including what happens to your right if the concession changes hands or lapses.
• Assume near-zero liquidity. The buyer pool for an island business is tiny; plan the exit before you enter, and assume you may hold a long time.

The takeaway

Cambodia’s islands offer something genuinely rare — and demand more clear-eyed diligence than anywhere else in the country. The land right is usually a lease or concession rather than clean title, the infrastructure is yours to build and run, the season is half the year, and the exit is thin to nonexistent. Approached as a hospitality business on a documented, durable legal right — vetted, fully costed, and held for the long term — an island property can be a wonderful thing to own. Approached as a beachfront land bargain, it is how people lose money in paradise. None of this is investment or legal advice; verify the current detail with a qualified local professional before you act.

Sources

• [S-108] Wikipedia — Koh Rong — island size and villages; the Royal Group 99-year lease (2008); road network; the ~$300M airport project; ferry access.
• [S-109] CamboJA News — Businesses ordered to leave Koh Rong Sanloem — the 2023 evictions; the two 2008 concessions covering ~2,244 of 2,400 hectares; documented compensation outcomes for renters.