Beside the mall, is the condominium built by the same developer of ION Orchard. The condominium is known as The Orchard Residence.
The Orchard Residences will be the tallest building along the shopping district, standing at 218 metres. This residential building will have a total of 175 residential units from the ninth floor to the 54th floor once completed, four of which are penthouses. During the first phase of the sale of 98 units, the units were sold for an average of S$3213 per sq ft.
It is so expensive, it means that each unit is about a few million dollars. You can read more about it from source. The highest floor are the penthouses which cost so much more than the lower units.
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