Buying guide
How Much Does a Private Island Cost?
There is no single answer, because an island's price reflects location, access, buildability and tenure far more than acreage. Two islands of the same size in the same country can differ by an order of magnitude.
The more useful question is what drives the number, and what the land price omits.
By Private Island Listings Editorial Team · Last updated 2026-08-20
The variables that set the price
- Travel time from a serviceable airport, and how that journey is made
- Whether the island can legally be built on, and whether permits already exist
- Buildable upland area, excluding tidal, mangrove or protected land
- Existing infrastructure: dock, power, water production, buildings
- Tenure: freehold, long lease or concession, and the security of the register
- Climate exposure and the resulting construction and insurance costs
Why acreage is a poor guide
A large, steep, forested island in a remote channel can be worth less than a small flat cay twenty minutes from an international airport. Buyers pay for usability, not for area.
Budget the whole project, not the purchase
| Cost category | Notes |
|---|---|
| Purchase price | The visible number, and often not the largest |
| Transaction costs | Transfer taxes, legal, survey, registration, structuring |
| Access works | Dock, landing, moorings, mainland base |
| Services | Water production, power, wastewater, fuel storage |
| Construction | Materially higher per square metre than mainland building |
| Annual operation | Caretaking, insurance, taxes, transport, maintenance |
A realistic way to compare opportunities
Price each shortlisted island as a total programme: acquisition plus the work needed to reach your intended standard of use. Comparing islands on that basis regularly reverses the ranking suggested by asking prices alone.
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Frequently asked questions
Are island prices published?
Asking prices are sometimes public, but achieved prices frequently are not, particularly at the upper end where transactions are private. Comparable evidence is therefore thinner than in mainland markets.