Buying guide
Private Island Due Diligence Checklist
Island diligence is broader than mainland conveyancing because you are verifying both the legal interest and the physical feasibility of using it. Use this checklist as a framework to agree scope with your advisers.
By Private Island Listings Editorial Team · Last updated 2026-08-20
Legal
- Full title or lease documentation and registry search
- Chain of ownership and any historic claims
- Encumbrances, easements, covenants and access rights
- Foreign ownership permits or consents required
- Corporate records where the island is company-held
Physical and environmental
- Current survey with boundaries marked on the ground
- Elevation, tidal range and storm surge exposure
- Buildable upland versus tidal, wetland or protected land
- Protected species, habitat designations and marine park boundaries
- Erosion history, ideally using dated aerial imagery
Infrastructure and access
- Water source feasibility and quality testing
- Power options and fuel logistics
- Wastewater treatment feasibility and approvals
- Dock or landing feasibility, permits and construction cost
- Mainland base: parking, slip, storage, contractor availability
Commercial
- Two to three years of actual operating costs where the island is developed
- Insurance history and current availability
- Staff arrangements and employment obligations
- Licences for any commercial use and whether they transfer
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