The granite manor house is surrounded by 560,000 square metres (6,027,790 sq ft) of park, belonging to the property.

When Kordelin died in 1917 the manor's ownership shifted to the University of Turku and, in 1922, the Finnish Parliament voted to acquire it for use as the president's summer residence.

The parks around the manor, containing approximately a thousand square metres of greenhouse and a garden with 3,500 roses called Medaljonki ('medallion'), are open to the public.

The scent and colour of these roses are at their peak in the middle of the summer,[citation needed] when the President and family and their guests come to Naantali for the holidays.

The parkland to the north of Kultaranta is in practically a natural state,[citation needed] though a few sandy pathways have been built there, and the woodland is kept in good condition.