Free tool
What will your island actually cost?
The listing price is typically 40–60% of the real number. This calculator shows the rest: infrastructure, permits, legal fees, and annual maintenance.
Purchase details
Region affects legal fees, construction costs, and tax rates
Infrastructure
10–15 kW covers a typical residence. 0 = grid/generator only.
Buildings
Set to 0 if residence already exists or not needed
Cost breakdown
Listing price$2,400,000
Stamp duty & legal$0
Permits & registration$0
Solar system$0
Desalination$0
Dock$0
Residence$0
Septic & wastewater$0
Contingency (10%)$0
Estimated total
$0
Estimates based on regional construction data and comparable island projects. Actual costs vary by contractor, logistics, and design. Use as a planning range, not a quote.
Annual operating costs
Property tax (est.)$0
Insurance$0
Maintenance$0
Caretaker / staff$0
Annual total
$0
1.0×
true cost vs. listing price